AUTOFLAME Mk8 MM Manual 

Unit 1-2 Concorde Business Centre Airport Industrial Estate Wireless Road, Biggin Hill Kent TN16 3YN United Kingdom COMBUSTION MANAGEMENT SYSTEMS +44 (0)1959 578 820 Tel: [email protected] Email: www.autoflame.com Web: MK8 MM MANUAL MM80001 19 MAY 2020 This manual and all the information contained herein is copyright of Autoflame Engineering Ltd. It may not be copied in the whole or part without the consent of the Managing Director. Autoflame Engineering Ltd’s policy is one of continuous improvement in both design and manufacture. We therefore reserve the right to amend specifications and/or data without prior notice. All details contained in this manual are correct at the time of going to print.

any of the MM / EGA systems. This is for safety reasons and effective use of the MM / EGA system. Hands on training is required. For details on schedules and fees relating to group training courses and individual instruction, please contact the Autoflame Engineering Ltd. offices at the address listed on the front. Short Form - General Terms and Conditions A full statement of our business terms and conditions are printed on the reverse of all invoices. A copy of these can be issued upon application, if requested in writing. The System equipment and control concepts referred to in this Manual MUST be installed, commissioned and applied by personnel skilled in the various technical disciplines that are inherent to the Autoflame product range, i.e. combustion, electrical and control. The sale of Autoflame’s systems and equipment referred to in this Manual assume that the dealer, purchaser and installer has the necessary skills at his disposal. i.e. A high degree of combustion engineering experience, and a thorough understanding of the local electrical codes of practice concerning boilers, burners and their ancillary systems and equipment. Autoflame’s warranty from point of sale • Two years on all electronic systems and components. • One year on all mechanical systems, components and sensors. The warranty assumes that all equipment supplied will be used for the purpose that it was intended and in strict compliance with our technical recommendations. Autoflame’s warranty and guarantee is limited strictly to product build quality, and design. Excluded absolutely are any claims arising from misapplication, incorrect installation and/or incorrect commissioning.

1.1 Mk8 MM Overview ........................................................................................................................... 13 1.1.1 Mk8 MM Main Features ........................................................................................................... 14 1.1.2 Overview of Micro-Modulation (MM) ........................................................................................ 15 1.1.3 Fixing Holes and Dimensions .................................................................................................. 16 1.2 Wiring Schematic ............................................................................................................................. 17 1.2.1 Main Board ............................................................................................................................... 17 1.2.2 Expansion Board ..................................................................................................................... 18 1.2.3 Fuse Ratings ............................................................................................................................ 19 1.3 Electrical Specifications ................................................................................................................... 20 1.3.1 MM Inputs and Outputs ........................................................................................................... 20 1.3.2 Expansion Board Inputs and Outputs ...................................................................................... 21 1.3.3 Cable Specifications ................................................................................................................ 22 1.3.4 MM Terminals Description ....................................................................................................... 23 1.3.5 Expansion Board Terminals Description ................................................................................. 26 1.4 Connection Between Mk8 MM and Mk8 EGA EVO ........................................................................ 29 1.5 Connection Between Mk8 MM and Mk8 DTI ................................................................................... 30 1.6 Sequencing Connection Diagram .................................................................................................... 31 1.7 Standards......................................................................................................................................... 32 2 OPTIONS AND PARAMETERS................................................................................................... 33 2.1 Options ............................................................................................................................................. 33 2.2 Parameters ...................................................................................................................................... 57 3 COMMISSIONING PROCEDURE ................................................................................................ 67 3.1 Overview .......................................................................................................................................... 67 3.2 Installation Checks ........................................................................................................................... 68 3.2.1 Commissioning Checks ........................................................................................................... 68 3.2.2 Operational Checks ................................................................................................................. 68 3.2.3 Installation Precautions ............................................................................................................ 68 3.2.4 Maintenance and Servicing ..................................................................................................... 68 3.3 Servomotors..................................................................................................................................... 69 3.3.1 Adjusting the Servomotor Potentiometer ................................................................................. 69 3.3.2 Servomotor Feedback Voltage ................................................................................................ 70 3.3.3 Servomotors – Direction Change............................................................................................. 70 3.3.4 Servomotors with Autoflame Valves ........................................................................................ 71 3.4 Commissioning Fuel and Air Positions ............................................................................................ 72 3.4.1 Starting Commissioning ........................................................................................................... 73 3.4.2 Enter CLOSED Position ........................................................................................................... 74 3.4.3 Enter OPEN Position ............................................................................................................... 75 3.4.4 Set up START Position ............................................................................................................ 76 3.4.5 Phase Hold .............................................................................................................................. 77 3.4.6 Add Trim Data During Commissioning .................................................................................... 78 3.4.7 Commissioning VSD ................................................................................................................ 80 3.4.8 Set GOLDEN START Position ................................................................................................. 81 3.4.9 Set FGR Position ..................................................................................................................... 83 3.4.10 Set HIGH Position .................................................................................................................... 85 3.4.11 Set INTER Position .................................................................................................................. 86

3.4.13 Save Commission .................................................................................................................... 88 3.5 Fuel Flow Metering .......................................................................................................................... 89 3.5.1 Commissioning Fuel Flow Through MM .................................................................................. 89 3.5.2 Commissioning Fuel Flow Through 4-20mA Feedback .......................................................... 91 3.5.3 Calorific Fuel Data ................................................................................................................... 92 3.5.4 Conversion Factor for Imperial Gas Flow Meters .................................................................... 93 3.5.5 Correction Factor for Burners Significantly Above Sea Level ................................................. 93 3.5.6 Gas Volume Conversion Factors ............................................................................................. 94 3.6 Gas/ Air Pressure Commission........................................................................................................ 96 3.7 Single Point Change ........................................................................................................................ 97 3.8 Online Changes ............................................................................................................................. 102 3.9 Setpoint Schedule .......................................................................................................................... 103 3.9.1 Setpoint Schedule Overview .................................................................................................. 103 3.9.2 Configuring Setpoint Schedule .............................................................................................. 103 4 FUEL OUTPUT MODES & CHANGEOVER OPTIONS ............................................................ 106 4.1 Overview ........................................................................................................................................ 106 4.2 Fuel Output Modes on the Mk8 MM .............................................................................................. 107 4.3 Single Fuel Output Mode (SFOM) ................................................................................................. 108 4.3.1 Fuel Configuration and Wiring in SFOM ................................................................................ 108 4.3.2 Pressure Sensors in SFOM ................................................................................................... 108 4.3.3 Commissioning in SFOM ....................................................................................................... 108 4.3.4 Fuel Changeover Process in SFOM ...................................................................................... 108 4.4 Dual Fuel Output Mode (DFOM) ................................................................................................... 109 4.4.1 Fuel Configuration and Wiring in DFOM ................................................................................ 109 4.4.2 Pressure Sensors in DFOM ................................................................................................... 109 4.4.3 Commissioning in DFOM ....................................................................................................... 110 4.4.4 Fuel Changeover Process in Dual Fuel Output Mode ........................................................... 110 4.5 Fuel Change on the Fly (COF) ...................................................................................................... 112 4.5.1 Overview ................................................................................................................................ 112 4.5.2 Checks before COF can take place ....................................................................................... 113 4.5.3 COF Changeover Position ..................................................................................................... 113 4.5.4 COF Fuel Changeover ........................................................................................................... 114 4.5.5 Checks after COF Fuel Changeover ..................................................................................... 115 4.5.6 Continuous Pilot with COF ..................................................................................................... 116 4.6 Gas Pressure Sensors and Valve Proving in DFOM with COF ..................................................... 118 4.7 Limitations of DFOM and COF ...................................................................................................... 119 5 PID CONTROL ........................................................................................................................... 120 5.1 Proportional Band .......................................................................................................................... 120 5.2 Integral Control .............................................................................................................................. 121 5.3 Derivative Control .......................................................................................................................... 122 6 MM FEATURES ......................................................................................................................... 123 6.1 Firing Rate Control ......................................................................................................................... 123 6.1.1 Hand Operation...................................................................................................................... 123 6.1.2 Low Flame Hold ..................................................................................................................... 123 6.1.3 Auto Operation ....................................................................................................................... 123 6.2 Using 4-20mA Servomotors........................................................................................................... 125 6.2.1 Overview ................................................................................................................................ 125 6.2.2 External 4-20mA Servomotor Requirements ......................................................................... 125

6.2.4 Settings .................................................................................................................................. 127 6.2.5 Commissioning ...................................................................................................................... 127 6.3 Flame Detection Using Flame Switch ............................................................................................ 128 6.4 Continuous Pilot ............................................................................................................................. 129 6.4.1 Continuous Pilot with Interrupted Pilot Sequence ................................................................. 130 6.4.2 Continuous Pilot with Intermittent Pilot Sequence ................................................................. 131 6.5 Load Sensor Value Calibration ...................................................................................................... 132 6.6 External Modulation ....................................................................................................................... 133 6.7 External Setpoint ........................................................................................................................... 133 6.8 Second Setpoint Select ................................................................................................................. 133 6.9 Start Position Interlock and Purge Position Interlock .................................................................... 134 6.10 Purge Pressure Proving/ Purge Hold ............................................................................................ 135 6.11 No Pre-Purge ................................................................................................................................. 136 7 INTELLIGENT BOILER SEQUENCING .................................................................................... 137 7.1 Sequencing Schematics ................................................................................................................ 137 7.1.1 Hot Water Example ................................................................................................................ 138 7.1.2 Single/ Multi-Burner Examples .............................................................................................. 139 7.1.3 IBS Communications ............................................................................................................. 140 7.2 Sequencing Options and Parameters ............................................................................................ 141 7.3 Hot Water Sequencing ................................................................................................................... 142 7.3.1 Implementing Hot Water Sequencing .................................................................................... 142 7.3.2 Two Port Valve Operation ...................................................................................................... 143 7.4 Steam Sequencing ........................................................................................................................ 144 7.4.1 Warming Steam Boilers ......................................................................................................... 144 7.4.2 Implementing Steam Sequencing .......................................................................................... 144 7.4.3 Low Pressure Steam Sequencing ......................................................................................... 145 7.5 Troubleshooting – Sequencing ...................................................................................................... 146 8 MULTI-BURNER OPERATION .................................................................................................. 147 8.1 Multi-Burner Overview ................................................................................................................... 147 8.2 Configuring Multi-Burner Operation ............................................................................................... 148 8.2.1 Wiring ..................................................................................................................................... 148 8.2.2 Options and Parameters ........................................................................................................ 149 8.2.3 Commissioning in Multi-Burner Operation ............................................................................. 149 8.2.4 Fuel Flow Metering in Multi-Burner Operation ....................................................................... 149 8.2.5 Single Point Change in Multi-Burner Operation ..................................................................... 149 8.3 Multi-Burner Operation Options ..................................................................................................... 150 8.3.1 Fully Linked Operation ........................................................................................................... 150 8.3.2 Independent on Fault ............................................................................................................. 151 8.4 Multi-Burner with Water Level Control ........................................................................................... 152 8.5 Multi-Burner with EGA ................................................................................................................... 153 8.5.1 Multi-Burner with Single EGA ................................................................................................ 153 8.5.2 Multi-Burner with individual EGAs ......................................................................................... 154 8.6 Multi-Burner External Modulation .................................................................................................. 155 8.6.1 Permanent External Modulation ............................................................................................ 155 8.6.2 Switched External Modulation ............................................................................................... 155 9 EXPANSION FEATURES .......................................................................................................... 156

10.1 Overview ........................................................................................................................................ 157 10.1.1 Safety ..................................................................................................................................... 157 10.1.2 Autoflame Water Level Control .............................................................................................. 157 10.1.3 Water Treatment .................................................................................................................... 158 10.2 Water Level Control Expansion Options ........................................................................................ 159 10.3 Water Valves ................................................................................................................................. 165 10.3.1 Specifications ......................................................................................................................... 165 10.3.2 Feed Water Valve Sizing ....................................................................................................... 166 10.3.3 Feed Water Control ............................................................................................................... 167 10.4 Ways of Level Sensing .................................................................................................................. 168 10.4.1 Overview ................................................................................................................................ 168 10.4.2 Configuration.......................................................................................................................... 169 10.5 Capacitance Probes ...................................................................................................................... 172 10.5.1 Overview ................................................................................................................................ 172 10.5.2 Operation ............................................................................................................................... 173 10.5.3 Specification........................................................................................................................... 173 10.5.4 Installation Safety Guidelines ................................................................................................ 175 10.5.5 Configuration.......................................................................................................................... 180 10.5.6 Capacitance Probes Maintenance ......................................................................................... 180 10.6 2nd Low Probe ................................................................................................................................ 181 10.6.1 Overview ................................................................................................................................ 181 10.6.2 Operation ............................................................................................................................... 181 10.6.3 Specifications ......................................................................................................................... 181 10.6.4 Installation and Safety Guidelines ......................................................................................... 183 10.6.5 Configuration.......................................................................................................................... 184 10.7 Analogue Water Level ................................................................................................................... 185 10.8 Auxiliary Alarm Inputs .................................................................................................................... 186 10.9 Commissioning Procedure ............................................................................................................. 187 10.9.1 Commissioning Checks ......................................................................................................... 187 10.9.2 Levels ..................................................................................................................................... 187 10.9.3 Setting End of Probe Level .................................................................................................... 188 10.9.4 Setting 2nd Low Level ............................................................................................................. 190 10.9.5 Setting 1st Low Level .............................................................................................................. 191 10.9.6 Setting Control Point Level .................................................................................................... 192 10.9.7 Setting HIGH Level ................................................................................................................ 193 10.9.8 Save Commissioning ............................................................................................................. 194 10.9.9 Operational Checks ............................................................................................................... 196 10.9.10 Adjust Control Point ........................................................................................................... 197 10.10 Water Level Control Functions .................................................................................................. 198 10.10.1 Pre-Alarms ......................................................................................................................... 198 10.10.2 Pump Bypass ..................................................................................................................... 198 10.10.3 Test Outputs and Shunt Switch ......................................................................................... 199 10.10.4 Sudden Pressure Drop ...................................................................................................... 200 10.11 Faults ......................................................................................................................................... 201 11 TOP BLOWDOWN ..................................................................................................................... 204 11.1 Overview ........................................................................................................................................ 204 11.1.1 Importance of Maintaining TDS ............................................................................................. 204 11.1.2 TDS, Conductivity and Temperature ..................................................................................... 205 11.2 Top Blowdown Expansion Options ................................................................................................ 206

11.4 TDS Probe ..................................................................................................................................... 210 11.4.1 Specification........................................................................................................................... 210 11.4.2 Dimensions ............................................................................................................................ 211 11.4.3 Installation .............................................................................................................................. 212 11.5 Configuration ................................................................................................................................. 213 11.5.1 Wiring ..................................................................................................................................... 213 11.5.2 Top Blowdown PID Controller ................................................................................................ 213 11.6 Ways of Controlling TDS Level ...................................................................................................... 214 11.6.1 Continuous TDS Control ........................................................................................................ 214 11.6.2 Solenoid and Servomotor 2-State TDS Control ..................................................................... 214 11.6.3 TDS Timing Diagram ............................................................................................................. 215 11.6.4 Sample Routine ..................................................................................................................... 216 11.7 Water Hardness Monitoring ........................................................................................................... 217 11.8 Calibrating the TDS Probe ............................................................................................................. 218 11.9 Faults ............................................................................................................................................. 220 12 BOTTOM BLOWDOWN ............................................................................................................. 221 12.1 Overview ........................................................................................................................................ 221 12.2 Bottom Blowdown Expansion Options ........................................................................................... 222 12.3 Bottom Blowdown Reduction ......................................................................................................... 223 12.3.1 Blowdown Energy Savings .................................................................................................... 223 12.3.2 Calculation for Bottom Blowdown Reduction ......................................................................... 224 12.4 Installation Guidance ..................................................................................................................... 226 12.4.1 Bottom Blowdown Valve ........................................................................................................ 227 12.4.2 Bottom Blowdown Using Solenoid Valve ............................................................................... 227 12.4.3 Bottom Blowdown Module ..................................................................................................... 228 12.5 Set-up ............................................................................................................................................ 230 12.5.1 Bottom Blowdown Settings .................................................................................................... 230 12.5.2 Setting Servomotor ................................................................................................................ 231 12.6 Bottom Blowdown Configuration ................................................................................................... 235 12.6.1 Bottom Blowdown Schedule .................................................................................................. 235 12.6.2 Bottom Blowdown Log ........................................................................................................... 237 12.7 Faults ............................................................................................................................................. 238 13 DRAUGHT CONTROL ............................................................................................................... 239 13.1 Overview of Draught Control ......................................................................................................... 239 13.1.1 Parts Required for Draught Control ....................................................................................... 241 13.2 Draught Control Expansion Options .............................................................................................. 242 13.3 Draught Control Operation ............................................................................................................. 244 13.3.1 Operation Overview ............................................................................................................... 244 13.3.2 Deactivation Window ............................................................................................................. 245 13.3.3 Draught Control Trim ............................................................................................................. 246 13.4 Draught Control Set-Up ................................................................................................................. 248 13.4.1 Configuration.......................................................................................................................... 248 13.4.2 Ways of Using Draught Servomotor ...................................................................................... 249 13.5 Commissioning Draught Control .................................................................................................... 250 13.5.1 Commissioning Checks ......................................................................................................... 250 13.5.2 Commissioning Screen .......................................................................................................... 251 13.6 Faults ............................................................................................................................................. 252

14.1 Overview ........................................................................................................................................ 253 14.2 Direct Modbus Expansion Options ................................................................................................ 254 14.3 Setup and Configuration ................................................................................................................ 255 14.4 Modbus Addresses ........................................................................................................................ 256 15 FIRST OUTS............................................................................................................................... 264 15.1 Overview of Firs Outs .................................................................................................................... 264 15.2 First Outs Expansion Options ........................................................................................................ 264 15.3 First Outs Configuration ................................................................................................................. 265 15.3.1 Enabling First Outs ................................................................................................................ 265 15.3.2 Running Interlock Circuit ........................................................................................................ 265 15.3.3 Accessing First Outs .............................................................................................................. 266 15.3.4 First Out Function .................................................................................................................. 267 15.3.5 Edit First Out Label ................................................................................................................ 268 15.3.6 First Outs Interlock ................................................................................................................. 269 16 HEAT FLOW............................................................................................................................... 270 16.1 Overview ........................................................................................................................................ 270 16.2 Expansion Options ......................................................................................................................... 271 16.3 Wiring ............................................................................................................................................. 273 16.4 Heat Flow Function ........................................................................................................................ 274 16.5 Steam Flow Metering ..................................................................................................................... 279 16.5.1 Steam Flow Calculation ......................................................................................................... 279 16.5.2 Steam Flow ............................................................................................................................ 283 16.5.3 Steam Flow with Economiser ................................................................................................ 284 16.5.4 Steam Flow with Deaerator ................................................................................................... 285 16.5.5 Steam Flow with Deaerator and Feed Sensor ....................................................................... 286 16.6 Hot Water Flow Metering ............................................................................................................... 287 16.6.1 Hot Water Flow Calculation ................................................................................................... 287 16.6.2 Hot Water Flow ...................................................................................................................... 289 16.6.3 Hot Water Flow with Economiser........................................................................................... 290 16.7 Spare Temperature Sensor ........................................................................................................... 291 16.7.1 Configuration Options ............................................................................................................ 291 16.7.2 Spare Temperature Sensor Terminal .................................................................................... 291 16.7.3 Exhaust Temperature Shutdown Threshold .......................................................................... 293 16.8 Faults ............................................................................................................................................. 294 17 FULLY METERED COMBUSTION CONTROL ......................................................................... 295 17.1 Overview ........................................................................................................................................ 295 17.1.1 Introduction ............................................................................................................................ 295 17.1.2 Importance of Excess Air ....................................................................................................... 295 17.2 Fully Metered Control Expansion Options ..................................................................................... 296 17.3 Fully Metered Combustion Control Operation ............................................................................... 300 17.3.1 Philosophy ............................................................................................................................. 300 17.3.2 Firing Rate ............................................................................................................................. 300 17.3.3 Control Process ..................................................................................................................... 301 17.3.4 Mass Flow Meters .................................................................................................................. 302 17.3.5 Volume Flow Meters .............................................................................................................. 302 17.4 Set-Up ............................................................................................................................................ 303 17.4.1 Configuration.......................................................................................................................... 303

17.4.3 Commissioning ...................................................................................................................... 305 17.5 Faults ............................................................................................................................................. 308 18 OPERATION............................................................................................................................... 309 18.1 Home Screen ................................................................................................................................. 309 18.1.1 Home Screen Components ................................................................................................... 310 18.1.2 Faults ..................................................................................................................................... 312 18.2 Status Screen ................................................................................................................................ 313 18.2.1 Status ..................................................................................................................................... 313 18.2.2 Status – History...................................................................................................................... 314 18.2.3 Status – Burner Enable/Disable............................................................................................. 315 18.2.4 Status – Low Flame Hold ....................................................................................................... 316 18.2.5 Status – Hand Mode .............................................................................................................. 317 18.3 Fuel-Air Screen .............................................................................................................................. 318 18.3.1 Fuel-Air – Curve ..................................................................................................................... 318 18.3.2 Fuel-Air – Map ....................................................................................................................... 319 18.3.3 Fuel-Air – History ................................................................................................................... 320 18.4 Flame Safeguard Screen ............................................................................................................... 321 18.4.1 Flame Safeguard ................................................................................................................... 321 18.4.2 Flame Safeguard – History .................................................................................................... 322 18.5 Channels Screen ........................................................................................................................... 323 18.5.1 Servomotor ............................................................................................................................ 323 18.5.2 VSD Channel ......................................................................................................................... 324 18.6 Gas Pressure Sensor Screen ........................................................................................................ 325 18.6.1 Gas Pressure ......................................................................................................................... 325 18.6.2 Gas Sensor – History ............................................................................................................. 326 18.7 Air Pressure Sensor Screen .......................................................................................................... 327 18.7.1 Air Pressure ........................................................................................................................... 327 18.7.2 Air Sensor – History ............................................................................................................... 328 18.8 Fuel Flow Screen ........................................................................................................................... 329 18.8.1 Fuel Flow ............................................................................................................................... 329 18.8.2 Fuel Flow – History ................................................................................................................ 330 18.9 Sequencing Screen ....................................................................................................................... 331 18.9.1 IBS – Status ........................................................................................................................... 331 18.9.2 3.9.2 IBS – Lead Boiler .......................................................................................................... 332 18.9.3 IBS – History .......................................................................................................................... 333 18.10 EGA Screen ............................................................................................................................... 334 18.10.1 EGA – Gas ......................................................................................................................... 334 18.10.2 EGA – Temperature ........................................................................................................... 335 18.10.3 EGA – Efficiency ................................................................................................................ 336 18.11 Outside Temperature Compensation Screen ............................................................................ 337 18.12 Water Level Screen ................................................................................................................... 338 18.12.1 Water Level – Status ......................................................................................................... 338 18.12.2 Water Level – History ........................................................................................................ 339 18.13 Top Blowdown Screen ............................................................................................................... 340 18.14 Bottom Blowdown Screen .......................................................................................................... 342 18.15 Steam Flow Screen ................................................................................................................... 343 18.15.1 Steam Flow – Status .......................................................................................................... 343 18.15.2 Steam Flow – History ......................................................................................................... 344 18.16 Draught Screen .......................................................................................................................... 345

18.16.2 Draught Control – History .................................................................................................. 346 18.17 First Outs ................................................................................................................................... 347 18.18 Fully Metered Combustion Control ............................................................................................ 348 18.19 System Configuration Screen .................................................................................................... 349 18.19.1 Language Selection ........................................................................................................... 350 18.19.2 Options ............................................................................................................................... 351 18.19.3 Parameters ........................................................................................................................ 352 18.19.4 Expansion Options ............................................................................................................. 353 18.19.5 Boiler Room Configuration ................................................................................................. 354 18.19.6 Online Changes ................................................................................................................. 361 18.19.7 Set Clock ............................................................................................................................ 362 18.19.8 Run Times .......................................................................................................................... 363 18.19.9 Bottom Blowdown Schedule .............................................................................................. 366 18.19.10 Manual ............................................................................................................................... 367 18.19.11 Commission Data .............................................................................................................. 368 18.19.12 Diagnostics ........................................................................................................................ 369 18.19.13 System Log ........................................................................................................................ 370 19 ERRORS AND LOCKOUTS ...................................................................................................... 371 19.1 Errors ............................................................................................................................................. 371 19.2 Lockouts......................................................................................................................................... 375 19.3 Alarms and Warnings .................................................................................................................... 380 19.4 Settings Conflicts ........................................................................................................................... 388 19.5 Forced Commission Reasons........................................................................................................ 393

Mk8 MM Manual Page | 12 VERY IMPORTANT SAFETY NOTES Please fully read and understand the following notes before commencing with any work related to the Mk8 MM. Failing to do so can result in serious injury or even death, and can cause serious equipment and property damage. Any person working on a boiler must be adequately trained and have a thorough understanding and appreciation of the boiler plant. It is the responsibility of the technician working on the plant to ensure that the system operation meets all local codes and regulations. Options, Parameters and Expansion Options must only be changed by an Autoflame-trained and certified technician who has thorough understanding of the Autoflame combustion control systems and boiler/combustion control in general. Any person changing these settings without undergoing the necessary training and gaining understanding of the boiler plant may place themselves and others in a potentially dangerous situation or cause permanent equipment damage. Modification to the Autoflame system settings should only ever be carried out by qualified combustion engineers. Changes to the Autoflame control system setup has the potential to make the controller operate in an unstable and potentially unsafe manner. Commissioning or burner start-up must only be carried out by a an Autoflame- trained and certified technician. The commissioning procedure as described must be strictly adhered to. Anybody commissioning an Autoflame system must be trained in operating combustion equipment safely. Autoflame products must only be installed, set up, commissioned and adjusted by an Autoflame certified technician. The fundamental idea of the system is to set a fuel valve position and then set a corresponding air damper position. Care must be taken when adjusting the fuel and air positions so as not to create any unstable or hazardous combustion conditions, e.g. moving the fuel valve to the open position without increasing the air damper position. Improper use may result in property damage, serious physical injury or death. Electrical connections are live, incorrect application may result in serious physical injury or death. If you are unclear about anything related to the Autoflame system, please contact Autoflame for technical advice.

Mk8 MM Manual Page | 13 1 MK8 MM OVERVIEW, SPECIFICATIONS AND WIRING 1.1 Mk8 MM Overview The Mk8 MM Controller is a Micro-Modulating system that offers comprehensive control over industrial and commercial boiler/burners. With the Mk8 MM, it is possible to control all boiler processes from a single 12.1” multi-touch screen interface without any added module. It is ideal for steam and water boilers (watertube or firetube), kilns and steam generators. Designed for oil, natural gas or both fuel, the MM features linkageless servomotor system and automated flame safeguard create conditions for unmanned boiler house. Additional expansion features include: • Autoflame water level management • Analogue water level using third party water level detection system • TDS/Top blowdown • Bottom blowdown • Draught control • Direct Modbus connectivity • First out annunciation • Fully metered, cross-limited control • Steam flow & hot water flow metering • Modbus connectivity allows for remote monitoring and management • Setpoint scheduling • Fuel change on the fly

Mk8 MM Manual Page | 14 1.1.1 Mk8 MM Main Features • Fuel/Air ratio control • 12.1” Full colour touch screen • 120V or 230V standard operation 50/60Hz • Controls up to 5 servomotors and 2 variable speed drives (VSD/ VFD) • 4 independent fuel programmes • Fully adjustable PID load control for temperature or pressure • Internal flame safeguard – full flame supervision with self-check UV or IR • Dual flame scanner operation (IR and UV scanners) • Gas valve train leak supervision and high/low gas pressure monitoring • Air pressure proving and monitoring • 128 lockouts, errors, alarms and warnings stored with date, time, phase and reset • 1000 entry system log stored with date, time and status • Online diagnostics showing system electronics information • Single point change for adding, removing and adjusting fuel/air positions on fuel-air curve • Golden start position for optimum ignition position • Flue gas recirculation start position • Variable servomotor travel speed • Burner control safety times user selectable • External voltage/current load control and setpoint adjustment • Outside temperature compensation of boiler setpoint • Second setpoint and run times scheduling • Hand/auto/low flame hold firing modes • Various boiler load detectors available • Fuel flow metering capability – instantaneous and totalised • Fuel flow feedback • Multi-burner capability with synchronised firing rate up to 10 MMs • 4-20mA (0-20mA) / 0-10V (2-10V) input for external modulation • 4-20mA (0-20mA) / 0-10V (2-10V) output confirming firing rate • Fully metered combustion control for commissioning based on equivalence ratio and excess air • Draft control to maintain stack pressure • Password protection of all safety related functions • Infra-red port for upload/download of commission data • 15 First out annunciation inputs • 4 fuel commission curves possible • 24-hour history graphical information on MM when powered on • Custom boiler display configuration • Download / upload all commissioning data and controller settings from MM module to a PC via Bluetooth or IR • System will sequence hot water boilers or steam boilers via lead/lag distribution • Fully adjustable user options within the system to tailor sequencing operation to the application • System control for isolation of valves or pumps (2 port valve operation) • Standby setpoint and warming for lag boilers via a standby pressure and timing sequence • Lead boiler and lag boiler warming modes selection • Return to pilot allows the main flame to turn off and the pilot flame can continue • Fully modulating feed water control with servomotor and VSD as well pump on/off • Capacitance probes for patented wave signature level detection • Water level alarms 2nd low, 1st low, high water and optional pre 1st low and pre-high water • Conductivity probe for auxiliary 2nd low alarm • Automatic bottom blowdown with time reduction for blowdown savings • Continuous modulating top blowdown control to maintain TDS level in water • Steam/ hot water flow metering to calculate flow rates based on temperature sensor • Direct Modbus communications from MM including remote setpoint and firing rate adjustment, burner enable/disable (without DTI or intelligent boiler sequencing) • Fuel Changeover on the Fly (COF) which allows fuel change without turning off the burner

Mk8 MM Manual Page | 15 1.1.2 Overview of Micro-Modulation (MM) To ensure maximum efficiency and reliability of the boiler plant operation, two requirements are of paramount importance, the air to fuel ratio and the target temperature or pressure: • The air to fuel ratio must be kept to the minimum to ensure complete combustion within the limitations of the combustion head design. A very high air to fuel ratio will be an indication of high excess air, which decreases the overall efficiency of the boiler. The fuel valve and air damper positions set for this minimum air to fuel ratio along the whole commission curve must be infinitely repeatable to an incredibly high degree of accuracy. • The target temperature or pressure of the boiler must be monitored by the combustion system and at all times, with exactly the right amount of fuel and air fired to achieve this target value. Irrespective of load changes, the burner/boiler system should be able to meet the target temperature or pressure. The burner’s fuel to air ratio was traditionally governed by mechanical systems which involved multiple cams, shafts and linkages controlled by one motor. The inherent hysteresis that occurred from the system design allowing components to be loose, which made the level of accuracy required impossible. With this poor accuracy, the response of the fuel input to the monitored temperature/ pressure of the boiler meant that the set target value at most times would overshoot or fall short. The Micro-Modulation module is the basic building block of the Autoflame System. The Autoflame MM provides an easily programmable and flexible means of optimising combustion quality throughout the load requirement range of the burner/boiler unit whilst ensuring the temperature is accurate to within 1°C (°F) and pressure to within 1 PSI (0.1Bar). Using direct drive motors to individually control the air damper and fuel valve(s), gives the optimum combustion of the burner at every point along the firing range. The allowed error in angular degrees of rotation between the two servomotors at any position in the load range is 0.1°. This automated system of burner control can achieve ‘locked on’ near stoichiometric air to fuel mixing throughout the fuel input range of the boiler while maintaining exact temperature or pressure target values. The load control incorporates user-variable Proportional Integral Derivative control. The PID control is infinitely adjustable to match any boiler room requirements.

Mk8 MM Manual Page | 16 1.1.3 Fixing Holes and Dimensions

Mk8 MM Manual Page | 17 1.2 Wiring Schematic 1.2.1 Main Board

Mk8 MM Manual Page | 18 1.2.2 Expansion Board If in doubt, Check with Autoflame Engineering Department

Mk8 MM Manual Page | 19 1.2.3 Fuse Ratings Fuse Rating Spare Part Number 1 6.3A (T) FU10026 Fuse 1 protects the mains input to the MM, including the mains output terminals 50 – 64. 2 2A (T) FU10034 Fuse 2 protects the power supply (terminal 69) for the servomotors, alarm and 2 port valve. If this fuse blows, error ‘Triac Power Supply Error (Check F2)’ will occur. 3 500mA FU10040 Fuse 3 protects the 13.5V power supply to the oil pressure sensor and IR scanner on terminal 49. If this fuse blows, error ‘Fused 13.5V Supply Error (Check F3)’ will occur. 4 500mA FU10040 Fuse 4 protects the 12V power supply to the gas/air pressure sensor and steam pressure detector on terminals 34 and 39. If this fuse blows, error ‘Fused 12V Supply Error (Check F4)’ will occur. 5 2A (T) FU10034 Fuse 5 protects the power supply (terminal PF) for the expansion servos and alarm outputs. If fuse 5 blows, error ‘Expansion PF Output (Check F5)’ will occur. 6 2A FU10027 Fuse 6 protects the DC circuits. If this fuse blows, the display will be off and both LEDs adjacent to fuse 7 and 8 will be off. 7 4A FU10050 Fuse 7 protects the internal 5V supply. If this fuse blows the display will be off and the LED adjacent to the fuse will be off. 8 2.5A FU10042 Fuse 8 protects the internal 12V supply. If this fuse blows the display will be off and the LED adjacent to the fuse will be off.

Mk8 MM Manual Page | 20 1.3 Electrical Specifications Classification according to BS EN298:2012 Mains Supply: Single phase 230V, +10%/-15%} 47-63 Hz, unit max. consumption 140W Single phase 120V, +10%/-15%} Climate: Min. Operation Temperature 0°C (32°F) Recommended Temperature Less than 40°C (104°F) Max. Operation Temperature 60°C (140°F) Humidity 0 to 90% non-condensing Storage: Temperature -20 to 85°C (-4 to 185°F) Protection Rating: The unit is designed to be panel mounted in any orientation and the front facia is IP65, NEMA4. The back of the unit is IP20, NEMA1. 1.3.1 MM Inputs and Outputs Output Terminal Rating (230V) Rating (120V) Notes 57 250mA 250mA Must be connected through contactor 58 250mA 250mA Must be connected through contactor 59 1A 2A 0.6 power factor 60 1A 2A 0.6 power factor 61 1A 2A 0.6 power factor 62 1A 2A 0.6 power factor 63 1A 2A 0.6 power factor 64 1A 2A 0.6 power factor 78 100mA 100mA To drive relay only – switched neutral 79 100mA 100mA To drive relay/lamp only – switched neutral 83 1A 2A 0.6 power factor 84 1A 2A 0.6 power factor Max. Load 6A 6A Note: 1. The high and low voltage connections are not safe to touch. Protection against electric shock is provided by correct installation. CAUTION – ELECTRIC SHOCK HAZARD. 2. Control voltage cabling should be maximum 10m, screened (if not screened then less than 1m, however servomotors can be unscreened up to 10m) 3. Any cabling over 10m must have additional surge protection. 4. Low voltage cables should be screened cable as specified in section 1.3.3. 5. The burner ‘High Limit Stat’ must be a manual reset type. 6. All external safety devices that require manual reset must be reset external to the Autoflame system and prior to completing the recycling interlock. Note: The cover (back plate) of the MM must always be re-fitted after the wiring is completed to prevent unauthorised wiring modifications or fuse replacement.

Mk8 MM Manual Page | 21 1.3.2 Expansion Board Inputs and Outputs Outputs: 120/230 V All outputs with the exception of PF are switched neutrals BFW 250mA Must be connected through contactor BB 250mA Must be connected through contactor HWV 100mA (alarm indicator) 2LA 100mA (alarm indicator) 2LV 100mA (alarm indicator) H1A 100mA (alarm indicator) 1LV 100mA (alarm indicator) 79 100mA (alarm indicator on MM board) TB 250mA Solenoid only, must be connected through contactor PF Maximum 2A (load currents for above terminals) Note: Max number of alarm indicators on at any time is 3 (1LV, 2LA, 2LV) Main Voltage Signal Inputs: At 120V current loading is approximately maximum 0.7mA per input. At 230V current loading is approximately maximum 1.5mA per input. Analogue Output Terminals 4-20mA Output Terminals Maximum Voltage Drop Supported 10, 12 12V 13, 15 12V 16, 18 12V I+, IV- 12V

Mk8 MM Manual Page | 22 1.3.3 Cable Specifications Low Voltage The screened cable used for low voltage wiring from the MM to the servomotors, detectors and variable speed drive must conform to the following specification: UV scanner cable length should not exceed 25m, all other screened cables should not exceed 50m. 16/0.2mm PVC insulated overall braid, screened, PVC sheathed. • Sixteen wires per core • Diameter of wires in each core 0.2mm • Rated at 440V AC rms at 1600Hz • DEF 61-12 current rating per core 2.5A • Maximum operating temperature 70oC (158oF) • Nominal conductor area 0.5sq mm per core • Nominal insulation radial thickness on core 0.45mm • Nominal conductor diameter per core 0.93mm • Nominal core resistance at 20oC. 40.1Ω/1000m • Nominal overall diameter per core 1.83mm • Fill factor of braid screen 0.7 • Equivalent imperial conductor sizes 14/0.0076 Use the number of cores suitable for the application. A universal part numbering system appears to have been adopted for this type of cable as follows: 16-2-2C 2 Core 16-2-3C 3 Core 16-2-4C 4 Core 16-2-6C 6 Core 16-2-8C 8 Core (5 Core not readily available) Note: If using 4 Core cable and interference is detected, use 2 sets of 2 Core. Data Cable Data cable must be used for communication connections between MMs for sequencing applications as well as between MMs to EGAs, MMs to a DTI and DTI to BMS systems. Communication cable should not exceed 1km. Types of data cable that can be used: • Belden 9501 for 2-core shielded cable (1 twisted pair) • Belden 9502 for 4-core shielded cable (2 twisted pairs) • STC OS1P24 Samples are available upon request. Low voltage and data cable can be ordered directly from Autoflame Engineering, please contact Autoflame Sales. When using a VSD, please review the manufacturer’s guidelines on installations to prevent EMC including the recommendations for reactors and filters.

Mk8 MM Manual Page | 23 1.3.4 MM Terminals Description S All terminals marked S are internally connected. They are provided for connections to the various screened cables. 1 Current Input, 0-20mA/ 4-20mA. For channel 5 only. Can be connected to the current output of a VSD or tachometer system or 4-20mA servomotor feedback 2 Voltage Input, 0-10V. For channel 5 only. Can be connected to the voltage output of a VSD or tachometer system 3 0V common for Terminals 1 or 2 4 Current Input, 0-20mA/ 4-20mA. For channel 6 only. Can be connected to the current output of a VSD or tachometer system or 4-20mA servomotor feedback 5 Voltage Input, 0-10V. For channel 6 only. Can be connected to the voltage output of a VSD or tachometer system 6 0V common for Terminals 4 or 5 7 Current Input, 4-20mA. Used for external modulation or external required setpoint 8 Voltage Input, 2-10V. Used for external modulation or external required setpoint 9 0V common for Terminals 7 or 8 10 Current Output, 0-20mA/ 4-20mA. For channel 5 only. Can be connected to the current input of a VSD or tachometer system or 4-20mA servomotor feedback 11 Voltage Output, 0-10V. For channel 5 only. Can be connected to the voltage input of a VSD or tachometer system 12 0V common for Terminals 10 or 11 13 Current Output, 0-20mA/ 4-20mA. For channel 6 only. Can be connected to the current input of a VSD or tachometer system or 4-20mA servomotor feedback 14 Voltage Output, 0-10V. For channel 6 only. Can be connected to the voltage input of a VSD or tachometer system 15 0V common for Terminals 13 or 14 16 Current Output, 4-20mA/ 0-20mA. Varies in accordance with firing rate 17 Voltage Output, 0-10V/ 2-10V. Varies in accordance with firing rate 18 0V common for Terminals 16 or 17 19, 20 Connections to an Autoflame outside temperature sensor 21, 22 Connections to an Autoflame self-check UV sensor 23, 24 Communications port connections for multi-burner operation 25, 26 Communications port connections to an Exhaust Gas Analyser (EGA) 27, 28 Communications port connections for DTI and/or IBS 29, 30 Digital communications connections to an Autoflame IR scanner 31, 32 Digital communications connections to an Autoflame air pressure sensor and/or Autoflame gas pressure sensor 33 0V supply to an Autoflame air pressure sensor and/or Autoflame gas pressure sensor

Mk8 MM Manual Page | 24 34 +12V supply to an Autoflame air pressure sensor and/or Autoflame gas pressure sensor 35 Signal inputs from Autoflame oil pressure sensor 48 0V supply to an Autoflame oil pressure sensor and/or Autoflame IR scanner 49 +13.5V supply to an Autoflame oil pressure sensor and/or Autoflame IR scanner 37 0V supply to an Autoflame temperature or pressure detector, 0-10V external load detector 38 Signal input from an Autoflame temperature or pressure detector, 0-10V external load detector 39 12V supply to an Autoflame pressure detector 40 0V supply to channel 1 and channel 2 servomotors 41 +12V supply to channel 1 and channel 2 servomotors 42 Signal from channel 1 servomotor, indicating position 43 Signal from channel 2 servomotor, indicating position 44 Signal from channel 3 servomotor, indicating position 45 Signal from channel 4 servomotor, indicating position 46 0V Supply to channel 3 and channel 4 servomotors 47 +12V supply to channel 3 and channel 4 servomotors 50, 51 Connections to an Autoflame UV scanner 52 Mains voltage input – external auxiliary delay to purge/ secondary proving set in option/parameter 157 53 Mains voltage input – burner on/off signal, running interlock circuit 54 Mains voltage input – air proving switch 55 Mains voltage input - proving circuits, e.g. gas valve proof of closure 56 Mains voltage input- lockout reset 57 Mains voltage output – call for heat 58 Mains voltage output – burner motor 59 Mains voltage output – start/pilot valve 60 Mains voltage output – main fuel valve 1 61 Mains voltage output – main fuel valve 2 62 Mains voltage output – vent valve 63 Mains voltage output – ignition transformer 64 Fuel 2 Main Valve 1(Dual Fuel Output Mode & Change on the Fly) 66 Mains supply – earth 67 Main supply – neutral 68 Mains supply – live/hot 69 Mains voltage output, power to servomotors and/or servomotor stepdown transformer

Mk8 MM Manual Page | 25 70 Switched neutral – drives channel 1 servomotor clockwise 71 Switched neutral – drives channel 1 servomotor counter clockwise 72 Switched neutral – drives channel 2 servomotor clockwise 73 Switched neutral – drives channel 2 servomotor counter clockwise 74 Switched neutral – drives channel 3 servomotor clockwise 75 Switched neutral – drives channel 3 servomotor counter clockwise 76 Switched neutral – drives channel 4 servomotor clockwise 77 Switched neutral – drives channel 4 servomotor counter clockwise 78 Switched neutral – 2-port valve for IBS operation 79 Switched neutral – alarm output for MM lockout/MM error/EGA error. 80 Start position interlock (selectable via option 154) 81 Purge position interlock/ delay purge time (selectable via option 155) 82 Fuel 2 valves C.P.I/POC (Dual Fuel Output Mode & Change on the Fly) 83 Fuel 2 Main Valve 2 (Dual Fuel Output Mode & Change on the Fly) 84 Fuel 2 Vent Valve (Dual Fuel Output Mode & Change on the Fly) 85 Mains voltage input. For use when using an external flame switch- 0V when at no flame state 86 Mains voltage input. For use when using an external flame switch- line voltage when at no flame state 87 Mains voltage input. Select second required setpoint- second set-point facility 88 Mains voltage input. Lead boiler select (overrides DTI) / Local – remote PID select for external modulation 89 Mains voltage input – selects fuel 1 curve 90 Mains voltage input – selects fuel 2 curve 91 Mains voltage input – selects fuel 3 curve (enables COF when energised with T92 simultaneously) 92 Mains voltage input – selects fuel 4 curve (enables COF when energised with T91 simultaneously) 93 Mains voltage input – warming start or night setback input (selectable via option 79) 94 Mains voltage input – selects hand operation (overrides mode set on MM screen) 95 Mains voltage input – selects low flame hold operation (overrides mode set on MM screen)

Mk8 MM Manual Page | 26 1.3.5 Expansion Board Terminals Description S All terminals marked S are internally connected. They are provided for connections to the various screened cables. P- 0V supply to top blowdown and feed water servomotors FW Signal from feed water servomotor, indicating position P+ +12V supply to top blowdown and feed water servomotors - Common for terminals T1, T2 and T3 T1 Signal input from T1 temperature sensor T2 Signal input from T2 temperature sensor - Common for terminal T1, T2 and T3 T3 Signal input from T3 temperature sensor TW Signal from top blowdown servomotor, indicating position F- Common for terminals MF and CF MF Current input, 4-20mA for cold water make up flow meter CF Current input, 4-20mA for condensate return flow meter I+ Current output, 4-20mA to feed water VSD V+ Voltage output, 0-10V to feed water VSD IV- Common for terminals I+ and V+ EX- Common for terminal EX+ EX+ Current input, 4-20mA for external water level probe or fuel flow feedback DT+, DT- Digital communications from draught control pressure sensor (Fuel 2 Gas Pressure Sensor in Dual Fuel Output Mode) DP- 0V supply to draught control pressure sensor and draught control servomotor (Fuel 2 Gas Pressure Sensor in Dual Fuel Output Mode) DP+ +12V supply to draught control pressure sensor and draught control servomotor (Fuel 2 Gas Pressure Sensor in Dual Fuel Output Mode) DPW Signal from draught control servomotor, indicating position 5T+, 5T- Digital communications from bottom blowdown module and 2nd low probe 4P- 0V supply to 2nd low resistance probe 4P+ +12V supply to 2nd low resistance probe 6T+, 6T- Communications port connections I/O module RS485 3P+ +9V supply to TDS probe

Mk8 MM Manual Page | 27 3P- 0V supply to TDS probe 3T+, 3T- Digital communication connections from TDS probe 1P+ +9V supply to capacitance probe 1 1P- 0V supply to capacitance probe 1 1T+, 1T- Digital communications connections from capacitance probe 1 2P+ +9V supply to capacitance probe 2 2P- 0V supply to capacitance probe 2 2T+, 2T- Digital communications connections from capacitance probe 2 FO1 First Out annunciation line voltage input 1 FO2 First Out annunciation line voltage input 2 FO3 First Out annunciation line voltage input 3 FO4 First Out annunciation line voltage input 4 FO5 First Out annunciation line voltage input 5 FO6 First Out annunciation line voltage input 6 FO7 First Out annunciation line voltage input 7 FO8 First Out annunciation line voltage input 8 FO9 First Out annunciation line voltage input 9 FO10 First Out annunciation line voltage input 10 FO11 First Out annunciation line voltage input 11 FO12 First Out annunciation line voltage input 12 PF Power feed 2A output (230V/110V) FO13 First Out annunciation line voltage input 13 FO14 First Out annunciation line voltage input 14 FO15 First Out annunciation line voltage input 15 HAI External high water auxiliary input 1AI External 1st low water auxiliary input 2AI External 2nd low water auxiliary input M/R System alarm mute/reset TST System test alarm inputs/ shunt switch (selectable via expansion option 21)

Mk8 MM Manual Page | 28 NC Unused – do not connect TB Switched neutral – top blowdown contactor TBI Switched neutral – drives top blowdown servomotor clockwise 1LV Switched neutral – 1st low water visual alarm H1A Switched neutral – 1st low/ high water audible alarm 2LV Switched neutral – 2nd low water visual alarm 2LA Switched neutral – 2nd low water audible alarm HWV Switched neutral – High water visual alarm BB Switched neutral – Bottom blowdown contactor BFW Switched neutral – Feed water pump contactor MVI Switched neutral – drives feed water servomotor clockwise MVD Switched neutral – drives feed water servomotor counter clockwise TBD Switched neutral – drives top blowdown servomotor counter clockwise DCI Switched neutral – drives draught control servomotor clockwise DCD Switched neutral – drives draught control servomotor counter clockwise

Mk8 MM Manual Page | 29 1.4 Connection Between Mk8 MM and Mk8 EGA EVO

Mk8 MM Manual Page | 30 1.5 Connection Between Mk8 MM and Mk8 DTI

Mk8 MM Manual Page | 31 1.6 Sequencing Connection Diagram

Mk8 MM Manual Page | 32 1.7 Standards The Mk8 MM has been tested and approved to the following standards: • BS EN 298: 2012 • BS EN 1643: 2014 • BS EN 1854: 2010 • BS EN 12067-2: 2004 • ISO 23552-1:2007 • UL 372, 5th Edition • CAN/CSA C22.2 No. 199-M89 • AS 4625–2008 • AS 4630–2005 • FM 7610 • FM 7710 The Mk8 MM has been manufactured in conformance with the applicable design, manufacturing and inspection requirements of EU Regulation (EU) 2016/426 and ISO 9001:2015 quality system.

Mk8 MM Manual Page | 33 2 OPTIONS AND PARAMETERS The Options, Parameters and Expansion Options must only be changed by factory trained and certified technicians who have a thorough appreciation of the Autoflame combustion systems and the combustion process in general. Any person changing these settings without the correct factory training and understanding of the boiler plant may place themselves and others in a potentially dangerous situation. 2.1 Options CH1, CH2, CH3, CH4, CH5, CH6 and CH7 refer to the rows of buttons respectively starting with CH1 at the top. The options, parameters and expansion options and their settings are all viewable while the MM is in run mode. In commissioning mode, all of the options, parameters and expansion options can be adjusted according to the application. Non safety-critical options, parameters and expansion options can be adjusted through Online Changes. Figure 2.1.i Splash Screen Power up the unit. If the MM has already been commissioned, press when the system starts up. If the system is not already commissioned, the MM will go into commissioning mode automatically.

Mk8 MM Manual Page | 34 Figure 2.1.ii Enter Commissioning Password “Enter Commissioning Password” is displayed. Use the keypad to enter the password, then press . Press on or to change the value of an incorrect entry. Note: The commissioning password should not be distributed to anyone who is not a factory trained and a certified engineer.

Mk8 MM Manual Page | 35 Figure 2.1.iii Commission Mode The Commission Mode screen gives information on the following: • Current selected fuel • Which fuels have been commissioned • Number of times the unit has been commissioned • Seral number • Bootloader version • BC, MM and Display software In Commission Mode, the engineer can: • Commission the burner for selected fuel • Commission gas and air pressure sensors • Commission water level probes • Commission the bottom blowdown module • Adjust options, parameters and expansion options • Setup and change Boiler Configuration • Configure first out settings and labels • Set the time and date • Upload/download commissioning data • Unlock expansion features • Set the language • View fault logs, system log and diagnostics • View fuel commission data Note: The Times Commissioned is for the total system and will increment with every fuel commission, single point change and commission data upload.

Mk8 MM Manual Page | 36 Figure 2.1.iv Options Press in the Commission Mode screen to access the Options. Any number of options/ parameters can be changed at one time. By pressing MM, PID, EGA, DTI or BC at the bottom of the screen, the options/ parameters can be grouped together by feature. When the changes have been made to suit the application’s needs, press Exit to go back to the Commission Mode screen. Options/ parameters 110 – 160 are the burner control settings and are safety critical; these must be entered the same for both the option and parameter value. If these BC options and parameters do not match, there will be an option/parameter conflict. To set all the options, parameters and expansion options to the default values and erase the commissioning data, set option/ parameter 160 to 5. The MM will then automatically restart and go into Commission mode.

Mk8 MM Manual Page | 37 Opt. # Default Range Description 1 0 MM: Boiler Temperature/Pressure Sensor Type 0 Temperature MM10006 1 Low pressure MM10010 2 Medium pressure MM10008 3 High pressure MM10009 4 Extra high pressure MM10017 5 External temperature (voltage input, range set by parameters 52 to 56) 6 External pressure (voltage input, range set by parameters 52 to 56) Note: External load detector wiring low voltage to terminal 37 and high voltage to terminal 38. 2 15 MM: Modulating Motor Travel Speed Limit If the speed of the motor is too fast, then decrease the value, and vice versa. At other times other than modulation, the motors move at full speed or at the value set in option 75. Movement is limited by the slowest channel i.e the slowest moving motor. 10 – 100 1.0 – 10.0 3 - Unused 4 - Unused 5 1 MM: Purge Position This purge position applies to channels 1-4 as selected in options 67-70, however VSD channels will always purge at open position as default. This setting applies for post-purge if set, see option/ parameter 118 and 135. 0 Channels 1 to 4 purge at HIGH position. 1 Channels 1 to 4 purge at OPEN position. 6 10 PID: Proportional Band The proportional band is an offset below the required setpoint; when the actual temperature/ pressure reaches this band, the burner will begin to modulate as it approaches the required setpoint. 5 – 2000 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 7 60 PID: Integral Time Every ‘n’ seconds, 10% of the present offset from the required setpoint is added or subtracted when below or above the setpoint, respectively, to the present proportional value. The value of ‘n’ is the number of seconds set in this option; if set to 0, there will be no integral control. 0 Disabled 1 – 250 Seconds

Mk8 MM Manual Page | 38 Opt. # Default Range Description 8 0 MM: Servomotor Channels Channel 1 is always enabled for fuel; this option sets the channels in use. 0 Channels 1 & 2 1 Channels 1, 2 & 3 2 Channels 1, 2, 3 & 4 Note: If option 8 is changed after commissioning, then the MM will need to be re-commissioned, unless this option is returned to its previous setting. 9 1 MM: Internal Stat Operation The internal stat turns the burner on and off according to the actual value relative to the required setpoint. For setting 0, the internal stat is kept closed all the time, and a working stat must be fitted to the boiler. For setting 1, the internal stat is opened at an offset above the required setpoint, and closed at an offset below the required setpoint. For setting 2, the internal stat is opened at an offset above the required setpoint, and closed an at offset above the required setpoint. The offset values are set in options 10 and 11. 0 Internal stat always closed 1 Burner operates below setpoint 2 Burner operates above setpoint E.g. Option 9 = 1, required setpoint = 100OC (212OF) E.g. option 9 = 2, required setpoint = 100OC (212OF) 10 3 MM: Burner Switch-Off Offset 2 – 1000 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) Note: This option is only relevant if option 9 is set to 1 or 2. 11 3 MM: Burner Switch-On Offset 0 – 1000 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) Note: This option is only relevant if option 9 is set to 1 or 2. 12 0 EGA: EGA Functionality For settings 2 or 3, the EGA will trim on the channel 2 air damper, once trim data has been added. If option 12 is set to 0 or 1, then trim can be added at a later date by changing this to 2 or 3 in online changes, going through single point change, and added trim data for each fuel-air position. 0 Not optioned 1 Monitoring only 2 Applies trim 3 Applies trim, combustion limits tested

Mk8 MM Manual Page | 39 Opt. # Default Range Description 13 0 EGA: EGA Fault Response 0 EGA faults generate Alarms (burner stops) 1 EGA faults generate Warnings (burners runs) Note: EGA alarms will drive the common system alarm output (terminal 79), see option 14 for warning response. 14 1 MM: Warning Response 0 Warnings do not drive Common System Alarm output (terminal 79) 1 Warnings drive Common System Alarm output (terminal 79) 15 3 MM: User Control This option sets whether the user can turn the burner on and off, or change the required setpoint via the flame screen on the MM 0 Burner on/off and setpoint control disabled 1 Burner on/off disabled and setpoint control enabled 2 Burner on/off enabled and setpoint control disabled 3 Burner on/off and setpoint control enabled 16 0 DTI: Sequencing and DTI Enable A lead boiler can be selected by pressing Lead Boiler in the IBS screen or via the DTI if optioned. Only 1 MM may be selected as lead boiler at a time, or the sequencing will not operate. The Lead Boiler button on the MM and the Lead Boiler Select on terminal 88 (see option 55) both override the DTI Lead Boiler Select. 0 Sequencing disabled 1 Sequencing enabled 2 DTI enabled 3 Sequencing and DTI 17 - Unused 18 1 EGA: Carry Forward of Trim When the system modulates, the correction that may already exist on the air damper position can be carried forward (only relevant if an EGA is operational on the system). Trim will be reset if the rate of change of the fuel valve angle is greater than that set in parameter 14. 0 Disabled 1 Enabled 19 0 EGA: O2 Upper Limit Offset If the current O2 value is above this offset limit from the commissioned value, an alarm/ warning (see option13) will occur, for option 12 set to 3. 0 Disabled 1 – 100 0.1% - 10.0% O2 20 0 EGA: CO2 Upper Limit Offset If the current CO2 value is above this offset limit from the commissioned value, an alarm/ warning (see option 13) will occur, for option 12 set to 3. 0 Disabled 1 – 100 0.1% - 10.0% CO2 21 0 EGA: CO Upper Limit Offset If the current CO value is above this offset limit from the commissioned value, an alarm/ warning (see option 13) will occur, for option 12 set to 3. 0 Disabled 1 – 200 1 – 200 ppm CO

Mk8 MM Manual Page | 40 Opt. # Default Range Description 22 0 EGA: O2 Lower Limit Offset If the current O2 value is below this offset limit from the commissioned value, an alarm/ warning (see option13) will occur, for option 12 set to 3. 0 Disabled 1 – 100 0.1% - 10.0% O2 23 0 EGA: CO2 Lower Limit Offset If the current CO2 value is below this offset limit from the commissioned value, an alarm/ warning (see option 13) will occur, for option 12 set to 3. 0 Disabled 0 – 100 0.1% - 10.0% CO2 24 - Unused 25 0 EGA: O2 Absolute Limit If the current O2 value is below this absolute limit, an alarm/ warning (see option13) will occur, for option 12 set to 3. 0 Disabled 1 – 200 0.1% - 20.0% O2 26 0 EGA: CO2 Absolute Limit If the current CO2 value is above this absolute limit, an alarm/ warning (see option13) will occur, for option 12 set to 3. 0 Disabled 1 – 200 0.1% - 20.0% CO2 27 0 EGA: CO Absolute Limit If the current CO value is above this absolute limit, an alarm/ warning (see option13) will occur, for option 12 set to 3. 0 Disabled 1 – 200 1 – 200 ppm CO 28 20 EGA: Trim Threshold The trim threshold is an offset from the required setpoint; if the actual value is below this offset, then the EGA will not trim. This option should be set to 0 if trim is to be effective at all times during firing, and/or if external modulation is optioned. No single point changes can be made if the actual value is below this trim threshold. 0 – 50 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 29 0 MM: Golden Start Golden start allows an optimum ignition position to be set in the fuel-air curve, which is not necessarily low flame or part of the standard modulating index. Parameter 15 sets how long golden start position is maintained and from which point to start counting down. 0 Disabled 1 Enabled. Time counted from point of main flame 2 Enabled. Time counted from ignition 30 50 DTI: Minimum Remote Setpoint (DTI/ Modbus/External) If a required value command is received from the DTI or Modbus that is below this minimum remote setpoint value, then it will be ignored by the MM. The MM will continue to fire to meet the previous required setpoint. 5 – 9990 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40)

Mk8 MM Manual Page | 41 Opt. # Default Range Description 31 100 DTI: Maximum Remote Setpoint (DTI/ Modbus/External) If a required value command is received from the DTI or Modbus that is above this maximum remote setpoint value, then it will be ignored by the MM. The MM will continue to fire to meet the previous required setpoint. 5 – 9990 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 32 20 EGA: Trim Delay After ignition, the EGA does not sample for the time delay set in this option (if EGA is set to 2 or 3). This allows for the combustion to stabilise before sampling commences. The delay timer starts at the ignition point. 0 – 250 Seconds 33 1 DTI: MM Identification Each MM within a sequencing/ DTI/ Modbus/ twin burner loop must be set with an individual ID number. For communications between the MMs, there cannot be more than 1 MM with the same ID number. 1 – 10 ID number 34 - Unused 35 10 DTI: Sequence Scan Time This is the time period between sequencing requests from the lead and the lag MMs. On the sequence scan time, the lead MM will demand lag burners to be brought online or offline, depending on load requirements. See parameters 86 and 87 for change down and up thresholds. Accurate fuel flow metering must be entered for sequencing to operate. The MMs must be connected using data cable (Belden 9501) screened at one end. 1 – 100 Minutes 36 0 EGA: (Mk7 Only) Sensor Selection This option selects if the Mk7 EGA is fitted with additional cells. 0 No optional sensor 1 NO2 optioned 2 SO2 optioned 3 NO2 and SO2 optioned 37 0 PID: Derivative Time The time taken to add/ remove an additional 10% to the firing rate based on the actual value and the required value. 0 Disabled 1 – 200 Seconds 38 2 PID: Derivative Deadband This deadband is the margin above and below the required setpoint in which no derivative control occurs. 0 Disabled 1 - 15 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 39 - Unused

Mk8 MM Manual Page | 42 Opt. # Default Range Description 40 0 DTI: Warming Facility for Low Pressure Steam For sequencing applications where non-return valves are not installed, it is not possible to use a setpoint to keep the boilers in a standby condition. A thermostat (aquastat) can be installed into the boiler’s shell. Set option/ parameter 79 to 0 to enable terminal 93 for warming stat. An input on terminal 93 stops/inhibits the burner when the MM is in warming. The boiler will remain in a warming state based on the settings in options 53 and 54. 0 Steam sequencing with non-return valves 1 Steam sequencing without non-return valves 41 0 DTI: Warming Mode For setting 0, the first lag is kept in a standby state with the second lag in warming, and the remaining lag boilers off. For setting 1, the first lag boiler is in standby, and the remaining lag boilers are in warming. 0 One MM in warming state 1 All unused MMs in warming state 42 20 DTI: Standby Setpoint For sequencing applications where non-return valves are installed, the first lag boiler uses a standby setpoint to keep the boiler in a standby condition. The standby setpoint is set as an absolute value in this option. When the standby setpoint is in effect, the burner is held at low flame hold. 5 – 9990 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 43 0 MM: Multi-Burner Function The multi-burner function can be used for up to 10 burners, allowing the firing rates to be synchronised for all the burners in the multi-burner loop. For setting 1, if an error or lockout occurs on a burner, all of the other burners will shut down; setting 1 is suitable for firetube boilers. For setting 2, if an error occurs on a burner, all of the other burners will shut down, however if a lockout occurs, the other burners will continue to fire; setting 2 is suitable for watertube boilers. Fuel flow metering must be commissioned accurately for the multi-burner function to operate. Please refer to section 8 for commissioning of the multi-burner function. 0 Disabled 1 Fully linked 2 Independent on Fault 44 1 MM: Multi-Burner ID When using the multi-burner function, the multi-burner IDs must be set on the MMs This option should be set to 1 for the master, and 2 onwards for the slave MMs. 1 – 10 Multi-Burner ID 45 0 MM: External Modulation When enabled, the internal PID control is disabled and the firing rate is set by an external controller applied to the appropriate input terminals 7, 8, 9. This input control signal can be 0-10V (2-10V) or 4-20mA (0-20mA) set through parameter 69, and represent zero/ low to high fire by setting parameter 68. A manual reset high limit stat must be fitted. For setting 1, an external working stat is required and option 9 should be set to 0. For setting 2, option 9 should be set to 1 or 2. 0 Disabled 1 Enabled, load sensor not shown 2 Enabled, load sensor shown 3 Firing Rate Limiter

Mk8 MM Manual Page | 43 Opt. # Default Range Description 46 0 MM: Cold Start Inhibit Time If the MM progresses from low fire cold start to firing and the burner shuts down within this cold start inhibit time, a cold start will not occur when the burner starts up again. This allows the burner to come straight on in normal firing in situations where the demand has increased drastically and the actual value drops fast. 0 Disabled 1 – 120 Minutes 47 0 MM: Cold Start Routine On burner start-up, if the actual value is at 30% or below of the required setpoint, then the burner will be held at low fire for the number of minutes set in this option. It will then go to mid-fire. If the actual value is below 60% of the required setpoint, then the burner will be held at mid-fire for the set minutes. Once this cold start time has elapsed, or the value goes above 60% of the required setpoint, the burner will go to high fire as per the internal PID. It is not recommended to use cold start routine with external modulation or sequencing. 0 Disabled 1 – 2000 Minutes 48 0 MM: Flue Gas Recirculation – Timer This is the time that the MM channels (servomotors/ VSDs) are held at the FGR start positions, after which modulation takes place. This timer starts at the end main flame proving. FGR allows approximately 15% of the boiler flue gases via an auxiliary channel (e.g. 3) to be fed back to the burner and mixed with combustion air, to reduce NOx. 0 Disabled 1 – 3600 Seconds 49 0 MM: Flue Gas Recirculation – Offset This is an offset from the required setpoint. The MM channels (servomotors/ VSDs) are held at the FGR start positions until the actual value reaches this offset value below the required setpoint. 0 Disabled 1 – 50 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 50 0 MM: Flue Gas Recirculation – Temperature Threshold The MM channels (servomotors/ VSDs) are held at the FGR start positions until the flue gas temperature has reached 120OC (248OF). This option can only be used if an EGA is optioned and operational. 0 FGR temperature threshold disabled 1 FGR temperature threshold enabled 51 2 MM: Multi-Burner Highest Slave ID This should be set to the highest slave ID set in option 44 for the MMs in the multi-burner loop. 2 – 10 Multi-burner slave ID 52 0 MM: Multi-Burner Differential Firing Rate Limit If the difference between the firing rates of the Master MM and the slave MMs is equal to or greater that this limit, the Master MM will stop modulating and wait for the slaves to catch up. When the difference reduces to less than or equal to 5%, the Master starts modulating again. 0 Disabled 1 – 20 1% - 20%

Mk8 MM Manual Page | 44 Opt. # Default Range Description 53 0 DTI: Steam Sequencing Burner Off Time When the MM is in warming mode, it will warm to the standby setpoint according to the on and off times set in options 53 and 54. 0 Disabled 1 – 200 Minutes 54 5 DTI: Steam Sequencing Burner On Time When the MM is in warming mode, it will warm to the standby setpoint according to the on and off times set in options 53 and 54. 1 – 30 Minutes 55 0 MM: Terminal T88 Function This options selects the function of terminal 88, see options16 and 45. For setting 0, a line voltage input on terminal 88 is used to select the lead boiler in sequencing, and overrides the DTI lead boiler select. For setting 1, a line voltage input on terminal 88 is used to select the external modulation signal and 0V for internal PID. Setting 2, a line voltage input on terminal 88 is used to select firing rate limiter (set in option 66 and 45) 0 T88 selects Lead Boiler 1 T88 selects External Modulation 2 T88 selects Firing Rate Limiter 56 0 MM: Alarm Output Operation (Terminal #79) This is a switched neutral output to select how the alarm function operates. 0 Relay normally off, on during alarm 1 Relay normally on, off during alarm 57 0 MM: Fuel Flow Metering Fuel flow metering determines the firing rate. If no fuel flow meter is available, a ‘dummy curve’ should be entered using the burner turndown ratio from the burner rating to determine the low fire point, and the burner rating for the high fire point. If enabled, fuel flow metering is initiated once the burner has been commissioned and is firing. The MM will drive up to the high fire point first, and then go down the curve. For setting 2, see options 59 and 60. If using setting 2 for fuel flow feedback, then 4-20mA signal is required on terminals EX- and EX+ on the expansion board (this cannot be enabled with external level sensor nor fully metered combustion control, see expansion option 4). For metric units, fuel flow is commissioned in MW for metric units and MMBTU/hr for imperial units. 0 Disabled 1 Enabled 2 Enabled with 4-20mA feedback 58 - Unused 59 100 MM: Fuel Flow at Maximum Feedback This will set the fuel flow value at 20mA feedback, see option 57. 1 – 10000 0.01MW – 100.0 MW 60 0 MM: Fuel Flow Feedback Fault Tolerance The fuel flow feedback fault tolerance allows an upper limit to be set on the fuel flow when option 57 is set to 2. If the fuel flow exceeds this limit for 5 seconds, then a warning will appear. 0 Disabled 1 – 500 0.1% - 50.0% of high-fire fuel flow

Mk8 MM Manual Page | 45 Opt. # Default Range Description 61 3725 MM: Fuel 1 Calorific Value This is the gross calorific value / higher heating value (HHV) including the latent heat of vaporisation of water. To set either metric or imperial units, see parameter 40. If the units are changed, then this option must be changed accordingly. 100 – 65000 100 = 1.00MJ/m3 or 100 Btu/ft3 62 2068 MM: Fuel 2 Calorific Value This is the gross calorific value / higher heating value (HHV) including the latent heat of vaporisation of water. To set either metric or imperial units, see parameter 40. If the units are changed, then this option must be changed accordingly. 100 – 65000 100 – 1.00 MJ/kg or 100 BTU/lb 63 2068 MM: Fuel 3 Calorific Value This is the gross calorific value / higher heating value (HHV) including the latent heat of vaporisation of water. To set either metric or imperial units, see parameter 40. If the units are changed, then this option must be changed accordingly. 100 – 65000 100 – 1.00 MJ/kg or 100 BTU/lb 64 3725 MM: Fuel 4 Calorific Value This is the gross calorific value / higher heating value (HHV) including the latent heat of vaporisation of water. To set either metric or imperial units, see parameter 40. If the units are changed, then this option must be changed accordingly. 100 – 65000 100 = 1.00MJ/m3 or 100 Btu/ft3 65 - Unused 66 0 MM: Firing Rate Limit This is the maximum firing rate that can be obtained by the system, imposed in auto and hand modes. Firing rate limit should not be used with DTI load index control or sequencing. 0 Disabled 1 – 100 % 67 1 MM: Channel 1 Purge Position 0 Channel 1 to purge position 1 Channel 1 to remain closed for purge 68 0 MM: Channel 2 Purge Position 0 Channel 2 to purge position 1 Channel 2 to remain closed for purge 69 0 MM: Channel 3 Purge Position 0 Channel 3 to purge position 1 Channel 3 to remain closed for purge 70 0 MM: Channel 4 Purge Position 0 Channel 4 to purge position 1 Channel 4 to remain closed for purge 71 0 MM: Continuous Pilot Shut Off Timer If continuous pilot is enabled (see option/ parameter 111), then after this timer has elapsed when in continuous pilot firing, the burner will go off. 0 Disabled 1 – 1440 Minutes

Mk8 MM Manual Page | 46 Opt. # Default Range Description 72 0 MM: Continuous Pilot Shut Off Threshold If continuous pilot is enabled (see option/ parameter 111), then if the actual value is higher than the combined burner switch-off offset (option 10) and this offset above the required setpoint in continuous pilot firing, the burner will go off. 0 Disabled 1 – 1000 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 73 0 MM: VSD Channel 5 Purge Position 0 Purge at Maximum Output 1 Purge at Minimum Output 74 0 MM: VSD Channel 6 Purge Position 0 Purge at Maximum Output 1 Purge at Minimum Output 75 100 MM: Purge Motor Travel Speed If the speed of the motor is too fast, then decrease the value. 10 – 100 0.1 – 10.0 76 0 EGA: Trim Channel If an EGA is optioned, then trim can be applied to either channel 2 servomotor or channel 5 VSD. For setting 1, options 91 to 98 must be set. 0 Trim on Channel 2 1 Trim on Channel 5 77 0 MM: VSD Channel 5 Output at Closed 0 Maximum Output at Closed 1 Minimum Output at Closed 78 0 MM: VSD Channel 6 Output at Closed 0 Maximum Output at Closed 1 Minimum Output at Closed 79 0 MM: Terminal T93 Function 0 Warming Stat 1 Night setback 80 0 MM: Outside Temperature Compensation 0 Outside Temperature Compensation Disabled 1 Outside Temperature Enabled using OTC unit 2 Outside Temperature Enabled using MM sensor 81 90 MM: Setpoint at Minimum Outside Temperature This setpoint is limited by the load detector set in option 1. 50 – 999 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 82 30 MM: Minimum Outside Temperature 0 – 145 Value 30 = -10OC or -10OF (see parameter 40) 83 80 MM: Setpoint at Maximum Outside Temperature This setpoint is limited by the load detector set in option 1. 50 – 999 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 84 80 MM: Maximum Outside Temperature 0 – 145 Value 80 = 40OC or 40OF (see parameter 40)

Mk8 MM Manual Page | 47 Opt. # Default Range Description 85 0 MM: Night Setback Offset This offset value is subtracted from the required setpoint. An input is required on terminal 93, see option 79. 0 Disabled 1 – 100 OC, OF, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load detector set in option 1 and metric/imperial units set in parameter 40) 86 0 MM: Channel 1 Servo Control Method 0 Autoflame Servo Motor, 0.1 degree control 1 Autoflame Servo Motor, 0.5 degree control 2 Industrial Servo Motor, 0.1 degree control 3 Industrial Servo Motor, 0.5 degree control 4 IO Unit 4-20mA Servo Motor, 0.5 degree control 5 IO Unit 4-20mA Servo Motor, 1.0 degree control 87 0 MM: Channel 2 Servo Control Method 0 Autoflame Servo Motor, 0.1 degree control 1 Autoflame Servo Motor, 0.5 degree control 2 Industrial Servo Motor, 0.1 degree control 3 Industrial Servo Motor, 0.5 degree control 4 IO Unit 4-20mA Servo Motor, 0.5 degree control 5 IO Unit 4-20mA Servo Motor, 1.0 degree control 88 0 MM: Channel 3 Servo Control Method 0 Autoflame Servo Motor, 0.1 degree control 1 Autoflame Servo Motor, 0.5 degree control 2 Industrial Servo Motor, 0.1 degree control 3 Industrial Servo Motor, 0.5 degree control 4 IO Unit 4-20mA Servo Motor, 0.5 degree control 5 IO Unit 4-20mA Servo Motor, 1.0 degree control 89 0 MM: Channel 4 Servo Control Method 0 Autoflame Servo Motor, 0.1 degree control 1 Autoflame Servo Motor, 0.5 degree control 2 Industrial Servo Motor, 0.1 degree control 3 Industrial Servo Motor, 0.5 degree control 4 IO Unit 4-20mA Servo Motor, 0.5 degree control 5 IO Unit 4-20mA Servo Motor, 1.0 degree control 90 0 MM: VSD Operation Channel 5 0 Disabled 1 Enabled 91 0 MM: Output from MM to VSD Channel 5 0 Output range 4 to 20mA 1 Output range 0 to 20mA 2 Output range 0 to 10V 92 0 MM: Output Units Displayed, VSD Channel 5 0 Selected output signal 1 Hertz 93 25 MM: Output Low Speed from MM to VSD Channel 5 1 – 200 Hertz 94 50 MM: Output High Speed from MM to VSD Channel 5 1 – 200 Hertz

Mk8 MM Manual Page | 48 Opt. # Default Range Description 95 0 MM: Input Signal to MM from VSD Channel 5 0 Input range 4 to 20mA 1 Input range 0 to 20mA 2 Input range 0 to 10V 96 0 MM: Input Units Displayed, VSD Channel 5 0 Selected input signal 1 Hertz 97 0 MM: Input Low Speed to MM from VSD Channel 5 0 – 200 Hertz 98 50 MM: Input High Speed to MM from VSD Channel 5 0 – 200 Hertz 99 40 MM: VSD Channel 5 Feedback Fault Tolerance This is used to check that the feedback varies while modulating. For example, if this option is set to 4%, the tolerance that is allowed while firing is ±4% of the whole VSD range. For commissioning, the difference between the point with the lowest feedback and the point with the highest feedback must be bigger than twice the tolerance, so for the default of 4% tolerance, the difference between the point with the lowest feedback and the point with the highest feedback has to be greater than 8% of the whole VSD range. 5 – 40 0.5% – 4.0% 100 0 MM: VSD Operation Channel 6 0 Disabled 1 Enabled 101 0 MM: Output from MM to VSD Channel 6 0 Output range 4 to 20mA 1 Output range 0 to 20mA 2 Output range 0 to 10V 102 0 MM: Output Units Displayed, VSD Channel 6 0 Selected output signal 1 Hertz 103 25 MM: Output Low Speed from MM to VSD Channel 6 1 – 200 Hertz 104 50 MM: Output High Speed from MM to VSD Channel 6 1 – 200 Hertz 105 0 MM: Input Signal to MM from VSD Channel 6 0 Input range 4 to 20mA 1 Input range 0 to 20mA 2 Input range 0 to10V 106 0 MM: Input Units Displayed, VSD Channel 6 0 Selected input signal 1 Hertz 107 0 MM: Input Low Speed to MM from VSD Channel 6 0 – 200 Hertz 108 50 MM: Input High Speed to MM from VSD Channel 6 0 – 200 Hertz

Mk8 MM Manual Page | 49 Opt. # Default Range Description 109 40 VSD Channel 6 Feedback Fault Tolerance This is used to check that the feedback varies while modulating. For example, if this option is set to 4%, the tolerance that is allowed while firing is ±4% of the whole VSD range. For commissioning, the difference between the point with the lowest feedback and the point with the highest feedback must be bigger than twice the tolerance, so for the default of 4% tolerance, the difference between the point with the lowest feedback and the point with the highest feedback has to be greater than 8% of the whole VSD range. 5 – 40 0.5% – 4.0% For safety reasons, options 110 – 160 must also be entered in as Parameters. It is the responsibility of the commissioning engineer to ensure that all settings are set in accordance with the appropriate standards, local codes and practices. If options 110 – 160 are not identical with parameters 110 – 160, then the MM will go straight to Commissioning Mode and an option/ parameter conflict message will appear.

Mk8 MM Manual Page | 50 Opt. # Default Range Description 110 1 BC: UV Flame Scanner Type See option/ parameter 120 for the UV threshold and 122 for the flame sensor operation. For setting 2, the self-check UV scanner opens and closes a shutter to check that the UV scanner is not given a false flame signal. 1 Standard scanner 2 Self-check scanner 111 0 BC: Pilot Type For interrupted pilot, when lighting off, the pilot valve will close at the point the main flame proving phase begins. For intermittent pilot, when lighting off, the pilot valve will remain open during firing. For continuous pilot, when the burner goes above its off differential of the required setpoint, the burner will continue to fire with the pilot valves energised for the set time period. See options 71 and 72. 0 Interrupted pilot 1 Intermittent pilot 2 No pilot 3 Continuous interrupted pilot 4 Continuous intermittent pilot Note: Setting 2 no pilot cannot be used with single valve pilot (option/ parameter 130). 112 40 BC: Pre-Purge Time Purging the boiler before burner start-up with air will force any combustion remnants out of the stack. Purge time should be set according to boiler manufacturing guide and local codes and regulations. Time remaining for the pre- purge process to complete is displayed on the main MM screen. 5 – 240 Seconds 113 3 BC: Pre-Ignition Time This is the time period when the ignition transformer is on before the pilot valves opens. 3 – 5 Seconds 114 3 BC: First Safety Time This is the time period when the pilot valve is open, before the flame is checked. The time range of this option depends on whether its gas or oil. 3 – 10 Seconds 115 3 BC: Pilot Prove Time - Pilot Trial for Ignition (PTFI) This is the time period for when the flame is checked after the first safety time, to prove the pilot flame. 3 – 5 Seconds 116 3 BC: Gas Second Safety Time – Main Trial for Ignition (MTFI) This is the time period when the main valves are open and the pilot valve is maintained open, before the flame is checked, for firing on gas. See option/ parameters 150 – 153. This does not apply for intermittent pilot, see option/ parameter 111. For firing on oil, see option/ parameter 123. 3 – 10 Seconds 117 5 BC: Main Flame Proving Time This is the time period after the second safety phase for interrupted pilot or after the pilot proving phase for intermittent pilot, where the flame is checked, before going to normal firing/modulation. 5 – 20 Seconds

Mk8 MM Manual Page | 51 Opt. # Default Range Description 118 0 BC: Post-Purge Time If set, a post-purge will occur after a normal burner shutdown. This time set should allow for the servomotors to travel from low fire to purge position. The flame is not checked during post-purge. See option/ parameter 135 for NFPA post-purge. Time remaining for the post-purge process to complete is displayed on the main MM screen. 0 – 100 Seconds (for option/ parameter 135 set to 0 or 2) 0 – 100 Minutes (for option/ parameter 135 set to 1 or 3) 119 10 BC: Control Box Recycle Time This is the time delay between the burner shutting down, and going through post-purge if optioned, and the burner starting up again. 3 – 120 Seconds 120 10 BC: UV Threshold This is the minimum flame signal strength, if the flame strength is lower than this threshold, a lockout will occur. The UV counts will stabilise at 5 times this value when increasing, and 3 times this value when decreasing. 5 – 50 UV counts 121 5 BC: Delay from Start of Pre-Purge until Air Switch Checked This time delay where the air switch is not checked is included within the total pre-purge time set in option/ parameter 112. 5 – 10 Seconds 122 0 BC: Flame Sensor Selection 0 UV 1 Flame Switch 2 IR 3 IR and UV 4 IR or UV 123 3 BC: Oil Second Safety Time – Main Trial For Ignition (MTFI) This is the time period when the main valves are open and the pilot valve is maintained open, before the flame is checked, for firing on oil. See option/ parameters 150 – 153. This does not apply for intermittent pilot, see option/ parameter 111. For firing on gas, see option/ parameter 116. 3 – 15 Seconds 124 0 BC: Timeout on Reaching Purge If the MM is stuck in Run to Purge or Run to Post-Purge because the servomotors and VSDs are moving to the purge position, then a lockout will occur after this timeout set in this option has elapsed. This does not apply to any requirements on purge timing such as any additional proving inputs. 0 Disabled 1 – 3600 Seconds

Mk8 MM Manual Page | 52 Opt. # Default Range Description 125 0 BC: Fuel Pressure Sensor Mode – Fuel 1 Gas: For setting 1, valve proving and pressure limits are checked by an Autoflame gas sensor. For setting 2, low pressure limit can be checked by external pressure switch. For setting 3, the system will wait for a mains voltage input on terminal 55 to confirm that the VPS test is completed. If a voltage is not detected on terminal 55 within 10 minutes, a lockout will occur. Please see Autoflame Sensors Guide for option/ parameters and wiring guides on VPS and pressure limits setups. Oil: For setting 2, pressure limits are checked by an Autoflame oil sensor. 0 Not checked 1 Pressure limits, valve proving 2 Pressure limits 3 External VPS 126 0 BC: Fuel Pressure Sensor Mode – Fuel 2 Gas: For setting 1, valve proving and pressure limits are checked by an Autoflame gas sensor. For setting 2, low pressure limit can be checked by external pressure switch. For setting 3, the system will wait for a mains voltage input on terminal 55 to confirm that the VPS test is completed. If a voltage is not detected on terminal 55 within 10 minutes, a lockout will occur. Please see Autoflame Sensors Guide for option/ parameters and wiring guides on VPS and pressure limits setups. Oil: For setting 2, pressure limits are checked by an Autoflame oil sensor. 0 Not checked 1 Pressure limits, valve proving 2 Pressure limits 3 External VPS 127 0 BC: Fuel Pressure Sensor Mode – Fuel 3 Gas: For setting 1, valve proving and pressure limits are checked by an Autoflame gas sensor. For setting 2, low pressure limit can be checked by external pressure switch. For setting 3, the system will wait for a mains voltage input on terminal 55 to confirm that the VPS test is completed. If a voltage is not detected on terminal 55 within 10 minutes, a lockout will occur. Please see Autoflame Sensors Guide for option/ parameters and wiring guides on VPS and pressure limits setups. Oil: For setting 2, pressure limits are checked by an Autoflame oil sensor. 0 Not checked 1 Pressure limits, valve proving 2 Pressure limits 3 External VPS 128 0 BC: Fuel Pressure Sensor Mode – Fuel 4 Gas: For setting 1, valve proving and pressure limits are checked by an Autoflame gas sensor. For setting 2, low pressure limit can be checked by external pressure switch. For setting 3, the system will wait for a mains voltage input on terminal 55 to confirm that the VPS test is completed. If a voltage is not detected on terminal 55 within 10 minutes, a lockout will occur. Please see Autoflame Sensors Guide for option/ parameters and wiring guides on VPS and pressure limits setups. Oil: For setting 2, pressure limits are checked by an Autoflame oil sensor. 0 Not checked 1 Pressure limits, valve proving 2 Pressure limits 3 External VPS

Mk8 MM Manual Page | 53 Opt. # Default Range Description 129 0 BC: VPS Operation 0 VPS operates before start-up 1 VPS operates after shutdown 2 VPS operates before and after 130 2 BC: Gas Valve Configuration 0 No vent valve 1 Vent normally closed 2 Vent normally open 3 No vent valve. Single valve pilot 4 Vent normally closed. Single valve pilot 5 Vent normally open. Single valve pilot 131 1 BC: Fuel valve output configuration This sets the way multi-fuels are configured on the MM, Setting 0, allows the configuration of 4 fuels and switching between them is possible using changeover relays. Setting 1 allows 2 fuels to be configured with each fuel having its own set of outputs and switching between fuels is possible without changeover relays. Setting 2 is similar to setting 1 but with the possibility of fuel Change on the Fly (COF). See section 4 of this guide for the full details. Fuel curves must be commissioned for each fuel valve output mode. This option must be set before commissioning the MM. 0 One set of outputs (changeover relays, 4 fuels) 1 Two sets of outputs (no changeover relays, 2 fuels) 2 Two sets of outputs, change on the fly (COF)* * requires unlock code 132 20 BC: Gas Valve Proving Time This is the time period for when both gas valves are closed to detect a change in air pressure for the ‘VPS air proving’ phase, or change in gas pressure for ‘VPS gas proving’ phase. 10 – 300 Seconds 133 25 BC: Maximum Pressure Change Allowed During VPS If MM detects a pressure change greater than this value, a lockout will occur. See parameter 41 for gas pressure display units. 0 – 13400 0 mbar – 1340 mbar (value 25 = 2.5 mbar) 0” WG – 537.777” WG (value 25 = (1.003 ”WG) 0 PSI – 19.435 PSI (value 25 = 0.036 PSI) 134 3 BC: VPS Valve Opening Time This is the time period for when the phases when a gas valve is opened – ‘VPS Venting’ for the void to vent to atmosphere and ‘VPS Void to Gas’ for the void to fill with gas. 3 – 20 Seconds 135 0 BC: Purge Time Units/ NFPA Post-Purge See option/ parameter 118 for the purge timing. For setting 2, option/parameter 118 must be set to 15 seconds or higher. During the NFPA post-purge, all the servomotors will remain in the position they were in before normal shutdown or lockout. The NFPA post-purge will occur under any normal shutdown or lockout at any point in firing. 0 Purge time in seconds 1 Purge time in minutes 2 NFPA post-purge in seconds 3 NFPA post-purge in minutes

Mk8 MM Manual Page | 54 Opt. # Default Range Description 136 25 BC: Gas Pressure Switch – Offset Lower Limit This is an offset lower limit from the commissioned gas pressure, see parameter 41 for the gas pressure display units. See option/ parameter 125, 126, 127 and 128 to enable the pressure limits. 0 – 13400 0 mbar – 1340 mbar (value 25 = 2.5 mbar) 0” WG – 537.777” WG (value 25 = (1.003 ”WG) 0 PSI – 19.435 PSI (value 25 = 0.036 PSI) 137 25 BC: Gas Pressure Switch – Offset Upper Limit This is an offset upper limit from the commissioned gas pressure, see parameter 41 for the gas pressure display units. See option/ parameter 125, 126, 127 and 128 to enable the pressure limits. 0 – 13400 0 mbar – 1340 mbar (value 25 = 2.5 mbar) 0” WG – 537.777” WG (value 25 = (1.003 ”WG) 0 PSI – 19.435 PSI (value 25 = 0.036 PSI) 138 25 BC: Gas Static Line Pressure Lower Limit Offset For setting 0, if the measure static line pressure during the VPS void to gas phase is below the gas pressure offset lower limit set in option/ parameter 136, a lockout will occur. If both options 136 and 138 are set to 0, then a lockout will occur if the measured static line pressure during VPS void to gas phase is below the absolute value in option 133. For setting other than 0, this measured static line pressure is checked against the value set in this option. 0 Option/ parameter 136 offset lower limit used 1 – 50000 0.1 mbar – 5000 mbar (value 25 = 2.5 mbar) 0.040”WG – 2006.630”WG (value 25 = 1.003”WG) 0.001 PSI – 72.519 PSI (value 25 = 0.036 PSI) 139 - BC: Oil Pressure Switch – Offset Lower Limit The MM will check the oil pressure is not below this offset lower limit from the commissioned oil pressure, during firing. 0 Disabled 1 – 4000 0.001 Bar – 4.000 Bar (0.015 PSI – 58.015 PSI) 140 0 BC: Oil Pressure Switch – Offset Upper Limit The MM will check the oil pressure is not below this offset lower limit from the commissioned oil pressure, during firing. 0 Disabled 1 – 4000 0.001 Bar – 4.000 Bar (0.015 PSI – 58.015 PSI) 141 0 BC: Air-Proving Pressure Threshold for Purge This is the minimum air pressure that must be detected by the MM during purge, when using an Autoflame air pressure sensor. If this is set to 0, then MM will look for the minimum air pressure set in option/ parameter 149. See parameter 43 for air pressure display units. 0 – 1200 0 mbar – 120.0 mbar (0” WG – 48.176” WG) 142 60 BC: UV Shutter Test Interval This is the time interval between shutter tests on the self-check UV scanner. See options/ parameter 110 and 122. 4 – 240 Seconds

Mk8 MM Manual Page | 55 Opt. # Default Range Description 143 0 BC: No Pre-Purge For setting 1, there will only be no pre-purge if the burner has recycled due to meeting operational temperature/ pressure, and the system has gone through VPS checks successfully. If the burner has a lockout, or is restarting after a lockout has been cleared, then the MM will force a pre- purge. No pre-purge is only available when the fuel is set to gas. 0 Enabled 1 Disabled 144 4 BC: Maximum Allowed UV Self-Check Errors The MM will test the flame detection of self-check UV scanner at a time interval, set in option/ parameter 142, and will generate a lockout if it has more errors than set in this option. See options/ parameters 110 and 122. 1 – 12 Errors 145 BC: First Out Interlock This expansion feature will need to be unlocked to enable first out interlock. For setting 1, all of the first outs will be tied to burner safety stat circuit. They will be automatically set for active low, and then can be selected for non-recycle or recycle. Please see expansion option 110. 0 Disabled 1 Enabled 146 - Unused 147 0 BC: Air Pressure Error Window This air pressure error window is only active during modulation; the burner will lockout if the air pressure is outside of this window. 0 – 300 0 mbar – 30.0 mbar (0” WG – 12.040” WG) 148 0 BC: Air Pressure Sensor Type For setting 0, and external air pressure switch must be wired to terminal 54.If a reset of voltage is not detected within 2 minutes on terminal 54 during the ‘Wait for Air Switch’ phase before running to purge, a lockout will occur. For setting 1, the air pressure sensor will look for zero air pressure in the ‘Zero Air Sensor’ phase before running to purge. Setting 2 includes the checks made for settings 0 and 1. 0 Air switch on T54 1 Autoflame air pressure sensor 2 Autoflame air pressure sensor and air switch on T54 149 10 BC: Air-Proving Pressure Threshold This is the minimum air pressure that must be detected by the MM during normal firing and during purge when option/ parameter 141 is set to 0, when using an Autoflame air pressure sensor. See parameter 43 for air pressure display units. 7 – 1200 0.7 mbar – 120.0 mbar (0.281” WG – 48.176 “WG) Value 10 = 0.401 “WG (1.0 mbar) 150 0 BC: Fuel 1 Type 0 Gas 1 Oil 151 1 BC: Fuel 2 Type 0 Gas 1 Oil

Mk8 MM Manual Page | 56 Opt. # Default Range Description 152 1 BC: Fuel 3 Type 0 Gas 1 Oil 153 0 BC: Fuel 4 Type 0 Gas 1 Oil 154 0 BC: Terminal T80 Function Setting 1 allows an additional safety check on the valves and damper to ensure that they are in the correct position for start/low fire. See Valves and Servomotors manual for information on setup and wiring. 0 Not used 1 Start Position Interlock 155 0 BC: Terminal T81 Function For setting 1, terminal 81 acts as a line voltage input for a mechanical proving switch. The switch must be made when the air channel servo is at the purge position and it must remain made for the whole duration of the purge phase otherwise a lockout is generated. This input must also not be made while not at purge position. For setting 2, terminal 81 acts as purge pressure proving switch input. The switch must be made continuously for the whole duration of the purge time. If it drops out, the purge timer restarts once the signal is made again. It must also not be made before the blower motor starts to confirm the input is working correctly. If this input comes on during the relay tests a lockout is generated. Option 158 adds an optional time limit for the purge pressure proving to be made. 0 Not used 1 Purge position interlock 2 Purge pressure proving 156 - Unused 157 0 BC: Delay to Purge (T52) Timeout An input on terminal 52 is required to indicate the system is ready to move toward the purge phase. If the MM does not see this input for 1 second within this time set, then a lockout will occur. Setting 0 will disable this timeout, so the MM would sit indefinitely in delay to purge. 0 Disabled 1 – 3600 Seconds 158 0 BC: Purge Pressure Proving (T81) Timeout If option/parameter 155 is set to 2, then the system will lockout if the purge pressure is not proved within the specified time. Setting to 0 will disable this timeout, so the MM will be in the purge phase indefinitely waiting for the pressure proving signal to be received on terminal 81. 0 Disabled 1 – 3600 Seconds 159 - Unused 160 0 BC: Clear Commissioning Data 5 Clear all commissioning data, options and parameters 10 Reset all options to default values 15 Reset all parameters to default values 20 Reset all safety options and parameters to default values 25 Reset all expansion options to default values

Mk8 MM Manual Page | 57 2.2 Parameters Figure 2.2.i Commission Mode – Parameters Press in the Commission Mode screen to access the Parameters. Any number of options/ parameters can be changed at one time. By pressing MM, PID, EGA, DTI or BC at the bottom of the screen, the options/ parameters can be grouped together by feature. When the changes have been made to suit the application’s needs, press Exit to go back to the Commission Mode screen. Options/ parameters 110 – 160 are the burner control settings and are safety critical; these must be entered the same for both the option and parameter value. If these BC options and parameters do not match, there will be an option/parameter conflict. To set all the options, parameters and expansion options to the default values and erase the commissioning data, set option/ parameter 160 to 5. The MM will then automatically restart and go into Commission mode.

Mk8 MM Manual Page | 58 Par.# Default Range Description 1 3 DTI: Sequence Scan Time Set When Units Goes Offline If a sequenced MM drops out of the sequence loop, there is a time delay before the next scan time. 0 – 20 Minutes 2 - Unused 3 10 DTI: Number of Boilers Initially On This sets the number of boilers which when powered on after a shutdown, are in the On state in the sequence loop. This set should be set to the highest MM ID number (see parameter 57) if the application requires all the MMs to be On in the sequence loop when powered back on. 1 – 10 4 45 EGA: Delay Before EGA Commission Can be Stored During commission and single point change, there is a delay before the EGA values are stored. This value should be set in proportion to how long it takes for the gases to reach the EGA 10 – 120 Seconds 5 4 DTI: Modulation Timeout If a sequenced MM does not start modulating after being asked to by the lead MM, it is ignored in the sequencing loop. Upon the next scan time, if the MM modulates as required, it will be included in the sequencing loop. 1 – 50 Minutes 6 - Unused 7 - Unused 8 30 EGA: Trim Delay After Drain This is the delay after draining the sample, before the trim cycle start. Within this delay, the trim correction on the air damper or VSD is maintained while the EGA drains and the cells are purged with air. 5 – 240 Seconds 9 - Unused 10 2 EGA: EGA Version 0 Mk7 - For use with Mk7 EGA 1 Mk8 Protocol (Legacy) – For use with Mk8 EGA 2 Mk8 Protocol (RS485) – For use with Mk8 EGA EVO 11 - Unused 12 0 EGA: CO Used for Trim on Oil If the fuel has been set as oil (see options/ parameters 150 to 153), then the trim function can include CO to calculate the required trim correction. 0 Disabled 1 Enabled 13 50 EGA: Commission Fuel-Rich Trim The % of air damper movement when commissioning fuel-rich trim. 20 – 75 2.0% - 7.5% 14 50 EGA: Trim Reset Angular Rate This is the change time in the fuel valve angle per minute that will reset the trim correction. 0 – 900 0.0 – 90.0 degrees per minute

Mk8 MM Manual Page | 59 Par.# Default Range Description 15 5 MM: Golden Start Time This is the time period for how long the servomotors and VSDs are held at the golden start position, see option 29. 2 – 100 Seconds 16 12 EGA: (Mk7 Only) Time Between Air Calibrations This is the time period between air calibrations if the burner does not go off. 1 – 50 0.5 hours – 25.0 hours 17 3 EGA: Number of Trims Before Limits Errors Generated When the combustion limits have been exceeded, the MM will make trim corrections on the air damper. If the number of these trims reaches the value set in this parameter an error will be generated. See options 19, 20, 21, 22, 23, 25, 26, 27 and parameters 94, 96 97 for limits. 0 – 10 Number of trims 18 100 EGA: Maximum Trim During Run This is the maximum trim % of air damper movement during firing. 20 – 100 2.0% - 10.0% 19 50 EGA: Commission Air-Rich Trim This is the % air damper movement when commissioning the air rich trim. 20 – 75 2.0% - 7.5% 20 - Unused 21 - Unused 22 - Unused 23 1 EGA: Add Air When CO Present This sets whether the trim function adds when CO is present. If the O2 and CO2 appear air rich but CO appears fuel rich, then the air damper will open further to remove CO. 0 Disabled 1 Enabled 24 120 EGA: (Mk7 Only) Air Calibration Time For the Mk8 EGA, this is set as default 6 minutes. 20 – 300 Seconds 25 - Unused 26 8 Trim Samples per Cycle A cycle is the period between when does the EGA carries out a drain to get rid of excess moisture in the exhaust gas sample. This parameter sets the number of trim corrections in between drains. 1 – 50 Samples Per Cycle 27 - Unused 28 0 MM: Internal High Limit Setpoint Internal High Limit Setpoint is used to define an absolute shutdown setpoint that also operates in commission mode as well as normal running mode. 0 Disabled 1 – 9990 OC, OF, PSI or 0.1 Bar or 0.01 Bar

Mk8 MM Manual Page | 60 Par.# Default Range Description 29 1000 MM: Load Sensor Adjustment This adjusts the load sensor (voltage) reading, as a percentage of the reading. 800 – 1200 Value 1000 = 100.0% of actual reading 30 10 MM: Load Sensor Filter Time 1 – 40 Seconds 31 0 EGA: (Mk7 Only) Efficiency Calculation Method For the Mk8 EGA, efficiency calculation method is set on the EGA itself. 0 English 1 European 32 - Unused 33 - Unused 34 - Unused 35 - Unused 36 - Unused 37 - Unused 38 *** MM: Commissioning Password Code 1 0 – 255 Code 1 39 *** MM: Commissioning Password Code 2 0 – 255 Code 2 40 0 MM: Display Units 0 Metric units 1 Imperial units 41 0 MM: Gas Pressure Units This will set the units displayed for the Autoflame gas pressure sensor optioned. Note, PSI units are not available for sensor MM80006. 0 mbar 1 inWG 2 PSI 42 0 MM: Oil Pressure Units This will set the units displayed for the Autoflame oil pressure sensor optioned. 0 Bar 1 PSI 43 - MM: Air Pressure Sensor Units This will set the units displayed for the Autoflame air pressure sensor. 0 mbar 1 inWG 44 - Unused 45 - Unused 46 - Unused

Mk8 MM Manual Page | 61 Par.# Default Range Description 47 - Unused 48 80 PID: Integral Band This is the percentage of the proportional band over which the integral control is active. 0 – 100 0% - 100% 49 - Unused 50 - Unused 51 - Unused 52 0 MM: External Load Detector – Number of Decimal Places This affects parameter the external load detector maximum and minimum values set in parameters 53 and 55. See option 1 and parameter 40. 0 0 decimal place 1 1 decimal place 2 2 decimal places 53 20 MM: External Load Detector – Maximum Value The scale will depend on how parameter 52 is set. See option 1 and parameter 40. 0 – 9990 Bar (PSI) or OC (OF) 20 = 20 Bar (PSI) or OC (OF) if parameter 52 is set to 0 20 = 2.0 Bar (PSI) or OC (OF) if parameter 52 is set to 1 20 = 0.2 Bar (PSI) or OC (OF) if parameter 52 is set to 2 54 0 MM: External Load Detector – Maximum Voltage 0 – 100 0.0V – 10.0V 55 20 MM: External Load Detector – Minimum Value The scale will depend on how parameter 52 is set. See option 1 and parameter 40. 0 – 9990 Bar (PSI) or OC (OF) 20 = 20 Bar (PSI) or OC (OF) if parameter 52 is set to 0 20 = 2.0 Bar (PSI) or OC (OF) if parameter 52 is set to 1 20 = 0.2 Bar (PSI) or OC (OF) if parameter 52 is set to 2 56 0 MM: External Load Detector – Minimum Voltage 0 – 100 0.0V – 10.0V 57 10 DTI: Highest MM ID This sets the highest MM ID number for that sequence or DTI loop. 1 –10 Sequence ID 58 1 EGA: (Mk7 Only) – Air Calibration on Startup For the Mk8 EGA, the air calibration schedule is set on the EGA itself. 0 Disabled 1 Enabled 59 - Unused 60 60 MM: Logo Display Timer (Standby) If a custom logo is stored on the data micro-SD card in the MM, then after this timer in standby mode, the custom logo will appear on the screen. 0 Disabled 1 – 3600 Seconds

Mk8 MM Manual Page | 62 Par.# Default Range Description 61 900 MM: Backlight On Time If the screen is not pressed and this timer elapses, the backlight will dim. 0 Disabled 1 – 1800 Seconds 62 0 DTI: Hot Water Sequencing For setting 0 the boilers, the lag boilers will be off. For setting 1, the lag boiler will operate as steam sequencing, as set in option 41. 0 Hot water sequencing operates normally 1 Hot water sequencing operates as steam sequencing 63 0 DTI: Two Port Valve Output Parity Sets terminal #78 operation 0 Valve Normally Open (Closed When Energised) 1 Valve Normally Closed (Opens When Energised) 64 - Unused 65 - Unused 66 - Unused 67 - Unused 68 1 MM: External Modulation Control Range The range is set for either low fire to high fire in setting 0, or zero to high fire in setting 1. See options 45 and 55. 0 Low to high 1 Zero to high 69 0 MM: Auxiliary Channel Input Range This sets the range for external modulation input on terminals 7, 8, and 9. 0 4 to 20mA input 1 0 to 20mA input 2 0 to 10V input 70 10 MM: Auxiliary Channel Filter Time This sets the time allowed for a reading to be taken on terminals 7, 8 and 9. 0 Disabled 1 – 30 Seconds 71 1 MM: Firing Rate Output Control Range This sets the range for firing rate output on terminals 16, 17, and 18. 0 4-20mA, 2-10V, Low to high 1 4-20mA, 2-10V, Zero to high 2 0-20mA, 0-10V, Low to high 3 0-20mA, 0-10V, Zero to high 72 0 MM: External Setpoint Input If enabled, terminals 7, 8, and 9 are used for external required setpoint. The range and filtering of the input is set in parameters 69 and 70. The required setpoint range is set in options 30 and 31. 0 Disabled 1 Enabled 73 - Unused 74 - Unused

Mk8 MM Manual Page | 63 Par.# Default Range Description 75 - Unused 76 - Unused 77 - Unused 78 - Unused 79 - Unused 80 - Unused 81 - Unused 82 - Unused 83 - MM: Display Diagnostic Values Enabling this parameter allows the display of more detailed information in the system log. 0 Disabled 1 Enabled 84 0 MM: Bluetooth Module Enables/disables the on-board Bluetooth module for the purpose of connectivity with the Autoflame Download Manager software. See Autoflame PC Software Guide. To enable connectivity via the IR port, this option must be disabled, Bluetooth and IR cannot be used at the same time. 0 Disabled 1 Enabled 85 0 MM: Modulation Exerciser Period If the modulation exerciser period is enabled, then the MM will repeatedly run between high fire and low fire. This value sets how long the MM will remain at the high fire and low fire positions. This should be only be used in test/inspection conditions. 0 Disabled 1 – 3600 Seconds 86 85 DTI: IBS Change Down Threshold IF the combined firing rate of the last 2 MMs in the sequence loop is below this value, then the last lag MM will go from ‘on’ to the next phase (‘standby’, ‘warming’ or ‘off’) depending on how option 41 is set. 0 – 99 0% - 99% 87 95 DTI: IBS Change Up Threshold If the firing rate of the last MM in the sequence loop in the ‘On’ phase is above this value, then the next MM will go to the ‘On’ phase upon the next sequence scan time, to meet the load demand. 0 – 100 0% - 100% 88 1000 MM: Outside Temperature Sensor Adjustment If the outside temperature reading is too high, then decrease this value. If the outside temperature reading is too low, then increase this value. 500 – 2000 50.0% - 200.0%

Mk8 MM Manual Page | 64 Par.# Default Range Description 89 MM: Stat Exerciser Period If the stat exerciser period is enabled, then T53 will be turned off for this timer set, and then turned off for this timer set, repeatedly. This should be used in test/inspection conditions. 0 Disabled 1 – 3600 Seconds 90 0 MM: VSD Minimum Feedback Variation Check (Fuel 1) Enable/disable VSD feedback variation tests for fuel 1. 0 Enabled 1 Disabled 91 0 MM: VSD Minimum Feedback Variation Check (Fuel 2) Enable/disable VSD feedback variation tests for fuel 2. 0 Enabled 1 Disabled 92 0 MM: VSD Minimum Feedback Variation Check (Fuel 3) Enable/disable VSD feedback variation tests for fuel 1. 0 Enabled 1 Disabled 93 0 MM: VSD Minimum Feedback Variation Check (Fuel 4) Enable/disable VSD feedback variation tests for fuel 1. 0 Enabled 1 Disabled 94 0 EGA: NO Upper Limit Offset If the current NO value is above this offset limit from the commissioned value, an alarm/ warning (see option 13) will occur, for option 12 set to 3. 0 Disabled 1 – 200 1 – 200 ppm NO 95 - Unused 96 0 EGA: Exhaust Temperature Upper Limit Offset If the current exhaust temperature value is above this offset limit from the commissioned value, an alarm/ warning (see option 13) will occur, for option 12 set to 3. See parameter 40. 0 Disabled 1 – 999 1 – 999 degOC or degOF 97 0 EGA: Exhaust Temperature Absolute Limit If the current exhaust temperature value is above this absolute limit, an alarm/ warning (see option 13) will occur, for option 12 set to 3. See parameter 40. 0 Disabled 1 – 999 1 – 999 OC or OF 98 - Unused 99 1 MM: Graceful Shutdown If enabled, when the fuel is deselected, the fuel valve outputs are de- energised, and then a post-purge occurs before the MM restarts. This must not be used if changeover relays are used on the system. Graceful shutdown cannot be used with assured low fire shut off in parameter 100. Cannot be used with DFOM or COF (option/parameter 131 setting 1 & 2). . 0 Disabled 1 Enabled

Mk8 MM Manual Page | 65 Par.# Default Range Description 100 0 MM: Assured Low Fire Shut Off If enabled, when the burner turns off on internal stat, the MM will modulate to low fire, shut down and recycle the system before turning off. Assured low fire shut off cannot be used with graceful shutdown in parameter 99. 0 Disabled 1 Enabled 101 0 DTI: Shuffle Sequencing This allows the sequence order to be changed remotely through the DTI or Modbus. See option 16 and expansion option 100. 0 Disabled 1 Enabled 102 - Unused 103 0 MM: Air Pressure Warning Lower Offset This is an offset lower limit from the commissioned air pressure. 0 – 1000 0 mbar – 100 mbar 104 0 MM: Air Pressure Warning Upper Offset This is an offset upper limit from the commissioned air pressure. 0 – 1000 0 mbar – 100 mbar 105 0 MM: Gas Pressure Warning Lower Offset This is an offset lower limit from the commissioned gas pressure, see parameter 41 for the gas pressure display units. These limits are also tested during main flame proving. See option/parameter 125, 126, 127, 128 to enable the pressure limits. A warning will be generated if the measured static line pressure during the VPS void to gas phase is below the absolute value in option 133. 0 – 13400 0 mbar (disabled) – 1340 mbar 0 inWG (disabled) – 537.777 inWG 0 PSI (disabled) – 19.435 PSI 106 0 MM: Gas Pressure Warning Upper Offset This is an offset upper limit from the commissioned gas pressure, see parameter 41 for the gas pressure display units. These limits are also tested during main flame proving. See option/parameter 125, 126, 127, 128 to enable the pressure limits. 0 – 13400 0 mbar (disabled) – 1340 mbar 0 inWG (disabled) – 537.777 inWG 0 PSI (disabled) – 19.435 PSI 107 *** MM: Online Changes Password Code 1 0 – 255 Code 1 108 *** MM: Online Changes Password Code 2 0 – 255 Code 2

Mk8 MM Manual Page | 66 Par.# Default Range Description 109 0 MM: Software Voltage Conditioner The MM performs internal tests to ensure that the mains power is safe for the unit to operate (zero crossing and mains input tests). When these tests return a negative result the MM generates a fault. This parameter governs the way the MM handle these tests results; setting 1 makes the MM more tolerant to the mains power instability while setting 2 disables the errors altogether. Note: Setting 2 should only be used temporarily while investigating and correcting the cause of mains power instability. Running the MM continually on unstable power can degrade the MM and cause permanent damage to the unit. 0 Standard 1 Increased 2 Errors Disabled Parameters 110 – 160 are a repeat of their corresponding options and will need to have the same value. It is the responsibility of the commissioning engineer to ensure that all settings are set in accordance with the appropriate standards, local codes and practices. If options 110 – 160 are not identical with the parameters 110 – 160, then the MM will go straight to Commissioning Mode and an option/ parameter conflict message will appear.

Mk8 MM Manual Page | 67 3 COMMISSIONING PROCEDURE 3.1 Overview Important Note: Prior to commissioning, the fuel and air servomotors must be calibrated to ensure that the position of the valves and damper correspond to the potentiometer feedback signal as displayed on the MM. When the valve is fully closed, the MM should display zero degrees. If it does not, please adjust the servomotor potentiometer. The commissioning procedure as described must be strictly adhered to. Anybody commissioning an MM must be trained in operating combustion equipment safely. The Autoflame products must only be installed, set up, commissioned and adjusted by an Autoflame certified technical engineer. The fundamental idea of the system is to set a fuel valve position and then set a corresponding air damper position. Care must be taken when adjusting the fuel and air positions so as not to create any unstable or hazardous combustion conditions, e.g. moving the fuel valve to the open position without increasing the air damper position. Improper use may result in property damage, serious physical injury or death. If the MM is commissioned without an EGA then a combustion analyser is required to check the exhaust gases. If the system does have an EGA, then a combustion analyser is not necessary as the EGA performs all normal exhaust gas measurements. When commissioning oil fuel, a smoke detection device is also necessary to check that the smoke generated is within safe limits. Once a start position has been entered, the high fire position is entered next, then descending fuel/air positions are entered consecutively until finally the low fire position is entered. CH1 and CH2 positions must always be less than the ones previously entered; however CH3 to CH7 can be set lower or higher than the previous position. CH7 is used for the draught servomotor (unlockable expansion feature). MM Channel Use (Normal Mode) Use (DFOM - COF) Ch1 Fuel valve Fuel 1 Valve Ch2 Air damper Air Damper Ch3 Auxiliary Servomotor Fuel 2 Valve Ch4 Auxiliary Servomotor Auxiliary Servomotor Ch5 VSD 1 VSD 1 Ch6 VSD 2 VSD 2 Ch7* Draught servomotor Draught servomotor * unlockable expansion feature On a newly installed system the following procedures should be carried out as listed: 1. Set up Fuel Valves Output Configuration Mode (refer to section 4 of this guide). 2. Check all interconnecting wiring between the MM and external components is correct. 3. Set options, parameters and expansion options required (refer to section 2). 4. Commission bottom blowdown module if optioned. 5. Commission water level probes and external level sensor if optioned. 6. Set up servomotors. 7. Program fuel/air positions. On a previously commissioned system is it possible to omit steps 1 to 5.

Mk8 MM Manual Page | 68 3.2 Installation Checks 3.2.1 Commissioning Checks When all the installation and burner adjustments are completed, the entire burner control system should be tested in accordance with the manufacturer’s instructions. The procedure should verify the correct operation of: 1. Each operating control (temperature, pressure etc.) 2. Each limit switch (temperature, pressure, low water cut-off, etc.) 3. Each interlock switch (airflow switch, high and low fuel pressure or temperature switches, purge and low fire switches, fuel valve proof of closure interlock etc.) 4. Pilot flame failure response and lockout. 5. Main flame failure response and lockout. 6. Tight shut-off for all valves. 3.2.2 Operational Checks 1. Close manual main shut-off valve. 2. Check all limit circuit wiring for proper operation and correct connection. 3. Confirm that the automatic main fuel valves are wired correctly. 4. Power the control and electronically check the proper sequence of operation. 5. After assuring yourself that all the interlocks and valves are properly wired and that the sequence of operation is correct, open the manual main shut-off fuel valve and proceed cautiously through the boiler light off process. Check all safety interlocks for proper shutdown of the boiler. 3.2.3 Installation Precautions The reliability of the equipment may be impaired if used in environments where strong electromagnetic fields exist e.g. if the equipment is installed in a boiler house where radio systems exist then additional EMC (Electro Magnetic Compatibility) measures may have to be considered. Please contact Autoflame for more information. 3.2.4 Maintenance and Servicing The Micro-Modulation unit uses solid state technology. It requires no routine maintenance. The servomotors/gas/oil/FGR valves do require routine maintenance. Any fault associated with these parts is usually diagnosed by the MM. Contact Autoflame for preventative maintenance procedures, please refer to the Valves and Servomotors manual for general checks.

Mk8 MM Manual Page | 69 3.3 Servomotors Autoflame supply three standard sizes of servomotors – small, large and industrial, which can be used for all channels. Autoflame fuel valves require small or large servomotors only. Both small and large servomotors can be configured to drive clockwise or counter clockwise to open a valve or damper. Servomotors can be installed in any orientation; 2 fixed rotation positions if using Autoflame valves. For layout of the small, large and industrial servomotors please refer to the Valves and Servomotors manual. Viewing the shaft end-on, from the potentiometer end, all servomotors drive in a clockwise direction if power is applied between the LIVE and CW terminals, and counter clockwise if the power is applied between the LIVE and CCW terminal. The operation of fuel valves and air dampers is often such that they open in a clockwise direction. If the operation needs to be reversed, it is necessary to swap various wiring connections between the MM and the servomotor(s). An example of reversing the operation of a servomotor is shown in Figure 3.3.3. Note: Servomotors are supplied by the factory set at 0.0o position. Remember that this position may not necessarily automatically position the damper at 0.0o or a closed position. This must be physically checked. Failure to do so can result in serious injury or death. 3.3.1 Adjusting the Servomotor Potentiometer Before a burner is fired it is essential to set up each Micro-Modulation servomotor. A tamper proof screwdriver is required (please contact Autoflame). Usually control valves/air dampers that the servomotors drive, move through up to 90.0o angular degrees. The MM system has the ability to drive valves through 360.0o degrees, but the MM will only display from - 6.0o to 96.0o degrees. All Channel 1 to 4 and 7 readings displayed on the MM are in angular degrees. It is necessary to adjust the potentiometer in the servomotor assembly so that the MM reads 0.0o when the relevant valve/damper is at its fully closed position. The technician must physically check the mechanical position of the dampers and valves, whilst all servomotors are set to 0.0o before leaving the factory this may have changed during shipping. DO NOT ASSUME THEY HAVE BEEN PREVIOUSLY SET CORRECTLY. Put the MM into the commissioning mode and press CLOSE to position the valve/damper mechanically by using the appropriate up and down buttons (see section 3.4.2). Remove the servomotor cover. For air servomotors carry out the following procedure: Use the channel 2 up/down buttons on the MM to position the air damper to its physically closed position. Loosen the two tamper proof screws just enough to enable the potentiometer to rotate. Rotate the potentiometer clockwise or counter clockwise until the relevant channel reads 0.0. Tighten the two tamper proof screws gently until the potentiometer is secure. Do not over tighten the screws. Check that the display still reads 0.0. If incorrect repeat the adjustment process. For fuel servomotors carry out the following procedure: On Autoflame gas, oil and gas/oil piggy-back valves it is necessary to remove the servomotor. Manually position the oil/gas valve slot to its closed position. Observe the position of the drive pin on the servomotor. Use the relevant channel up/down buttons to position the pin so that when the servomotor is reassembled to the valve it is in line with the slot. Reassemble the servomotor to the valve, loosen the two tamper proof screws and proceed to adjust the potentiometer position until 0.0o is displayed. Use the external position indicator to ensure the valve is in the fully closed position.

Mk8 MM Manual Page | 70 3.3.2 Servomotor Feedback Voltage In applications where the servomotor is not positioned close to the display then it is possible to measure the feedback voltage from the servomotor in order to ensure that 0.0 degrees is displayed. By testing the DC voltage between the blue and green wires (wiper and 0V) on the servomotor low voltage terminals this will read 0.21V DC when the reading on the display is 0O. The same can be done for when the servomotor is at 96.0O where the voltage will be 3.6V. 3.3.3 Servomotors – Direction Change

Mk8 MM Manual Page | 71 3.3.4 Servomotors with Autoflame Valves On threaded valves, the pin on the top of the valve is 90 degrees opposite from the position of the butterfly valve. On flanged valves, the pin on the top of the valve is in line with the position of the butterfly valve. For both valves the external visual position indicator is in line with the position of the butterfly valve. Regardless of the type of valve being used, the servomotor is dispatched from the factory with the potentiometer in the zero position. The same servomotor will be correct for both types of valve, as the servomotor for the threaded valve is mounted at 90 degrees different from the flanged valve. Figure 3.3.4.i Valve Pin Positions

Mk8 MM Manual Page | 72 3.4 Commissioning Fuel and Air Positions The following procedure is shown for commissioning the EGA with option 12 set to 0 (Not Optioned), or 1 (Monitoring only). Trim can be added later by setting option 12 to 2 (Applies trim) or 3 (Applies trim, combustion limits tested). Please see section 3.7 for adding/adjusting the trim data later during Single Point Change. If the EGA is optioned later in Online Changes, the MM will not require a full re-commission; the trim data can be added in Single Point Change. For option 12 set to 0 or 1 during commissioning, omit section 3.4.6. For option 12 set to 2 or 3 during commissioning, please include section 3.4.6. The fuel and air positions need to be programmed for the following points: CLOSED, OPEN, GOLDEN START (if optioned), FGR START (if optioned), LOW FIRE (START), INTER POINTS, and HIGH FIRE. There must be a minimum of 3 INTER points entered on the fuel-air curve, and a maximum of 18. Points can be added/removed in Single Point Change mode (see section 3.7). During commissioning the required setpoint is not active; the internal stat remains on at all times regardless of the actual value. Ensure that the high limit stat is set correctly and wired into the recycling interlock (T53), as this will turn the burner off in the event that the safe working maximum temperature or pressure of the boiler is exceeded. The high limit stat should be set below the rating of the safety valve, please see the manufacturer’s guidelines for the safety valve for that boiler. Note: If a fault occurs, the boiler goes above the high limit stat or power is lost to the MM during commissioning, no data is stored. The points entered are only stored within the MM once the commission has been completed.

Mk8 MM Manual Page | 73 3.4.1 Starting Commissioning Figure 3.4.1.i Starting Commissioning Once the options, parameters and expansion options have been set, press on the Commission Mode screen in Figure 2.1.ii. If the MM has already been commissioned, then press on the Home Display. Figure 3.4.1.i shows the Commissioning screen. In the Commissioning screen, the 7 channel positions will be shown, with the unused channels greyed out. Once the MM goes through its internal relay checks and VPS (if optioned), the message ‘Select Commissioning’ will display.

Mk8 MM Manual Page | 74 3.4.2 Enter CLOSED Position Figure 3.4.2.i Enter CLOSED Position The MM is now waiting for the CLOSED position to be entered. Press to enter this position. Note: No error checking of the servomotors is enabled at this stage, therefore, do not to drive the servomotors/ dampers beyond any mechanical limitations that may be present on the damper/valve. This may cause damage to the servomotor and/or the damper/valve. Use the buttons to set the positions to 0.0O. Note: Double check the damper/valve is physically at the 0.0 (closed) position. This can be achieved by checking for external indications on the damper assembly or the fuel valve. It is the engineer’s responsibility to ensure that the servomotors are correctly calibrated. Incorrect calibration can cause serious injury or death. Press to store the CLOSED position. The burner motor output T58 will energise at this point. A message will then be displayed ‘Enter OPEN Position.’

Mk8 MM Manual Page | 75 3.4.3 Enter OPEN Position Figure 3.4.3.i Enter OPEN Position Press and then drive the fuel and air servomotors to their OPEN position. The button hold facility allows multiple channels to be driven up or down at the same time. Press on the blue circles next to the channels; once selected they will appear as to indicate the channels are selected. Use the buttons to drive both servomotors to the OPEN position simultaneously. This is normally 90.0 o for Autoflame gas butterfly valves and burner air dampers, but may be set to less than 90.0 o if there are mechanical stops/limits on third party valves. Channels 5 and 6 cannot be adjusted at this stage, its calibration is dictated by the drive set-up and relevant options. Press to save the OPEN positions. Pressing on the Fuel-Air tab at any time will give you a graph showing the fuel and air servomotor angles.

Mk8 MM Manual Page | 76 3.4.4 Set up START Position Figure 3.4.4.i Set up START Position Once the system has purged (see options/ parameters 75 and 112), the message ‘Set up START Position’ will display on the MM. Press and drive the servomotors to their START position. To enter a fuel START position which is less than 10 degrees below the OPEN position, you must drive the servomotor below this band, and then back open. For example, if the CH1 OPEN position is set at 90.0O, to set a CH1 START position of 83.0O, you must drive the CH1 servomotor to below 80.0O and then to 83.0O. WARNING: ENTERING THE START POSITION BEFORE REDUCING FUEL INPUT APPROPRIATELY COULD RESULT IN SERIOUS PHYSICAL INJURY OR DEATH. Press to enter the START position, where a light off can take place. These fuel and air positions are not stored permanently as it is just a light-off position to put a flame in the boiler and begin the commissioning process.

Mk8 MM Manual Page | 77 3.4.5 Phase Hold When the system is in commissioning mode only, the Phase Hold feature enables the commissioning engineer to pause the ignition sequence of the burner to make adjustments to the gas regulator if needed. The phase hold feature can be used in pilot open, pilot proving and main flame proving. If the phase is held in the pilot open stage and the flame goes out, a lockout will occur after 20 seconds. However, if the phase is held in either the pilot proving or main flame proving stages, the MM will lockout immediately if the flame scanner does not detect a flame. If the flame is present and the ‘phase hold’ condition is left indefinitely the ‘Freeze Timeout’ lockout will occur after 10 minutes. When the system is in a run mode the facility is disabled. To make adjustments with the gas manually, press to keep the system at its current phase positions, a little blue dot on this ‘button’ will appear to indicate that the phase is held. Ensure that the main fuel valve is manually isolated until the pilot flame has been successfully established. Once this has been successfully established, gradually introduce the main fuel supply to the burner while observing the flame stability. Continue to introduce fuel until the manual operated main fuel isolation valve is fully open providing safe and stable combustion that can be maintained. If the combustion is not safe and stable, then adjust the fuel/air ratio accordingly. Once the adjustments have been made, press to continue with the commissioning process. WARNING: IT IS THE RESPONSIBILITY OF THE FACTORY TRAINED TECHNICIAN TO ENSURE THAT USE OF THE PHASE HOLD FACILITY DOES NOT LEAD TO A HAZADOUS SITUATION. FAILURE TO DO SO WILL RESULT IN SERIOUS EQUIPMENT DAMAGE, CRITICAL INJURY OR DEATH.

Mk8 MM Manual Page | 78 3.4.6 Add Trim Data During Commissioning If option 12 is set to 2 or 3 during commissioning, when setting the servomotors for the HIGH, INTER, GOLDEN START, FGR START and START positions, the trim data will also need to be saved for the fuel rich and air rich trim conditions. The message ‘Waiting for EGA readings’ will display. Figure 3.4.6.i Sampling Press on the EGA tab to display the EGA readings.

Mk8 MM Manual Page | 79 Figure 3.4.6.ii Commissioning with Trim After you press to save those servomotor positions, the EGA will carry out its fuel rich and air rich trim. Once these trim values have been saved, the system will continue with the commissioning process. Note: If the MM has not been enabled for trim during commissioning, this can be added later by setting option12 for trim, and going into Single Point Change to add trim to each point, see section 3.7.

Mk8 MM Manual Page | 80 3.4.7 Commissioning VSD Figure 3.4.7.i Commissioning VSD Press on the VSD tab to view the VSD output and input signal during commissioning. If the MM has been enabled with VSD for commissioning and then disabled, or vice versa, a conflict message will appear ‘VSD configuration does not match commissioning.’ If there is little movement required with the VSD signal, the feedback fault tolerance should be set accordingly. If the tolerance is not set according to the variation, an error ‘VSD feedback change too small’ will occur. Please see options 99 and 109 for the VSD fault tolerance, which ensures that a VSD can be verified to be at the correct speed at low fire and different to that of high fire. This also ensures that VSD signal is checked for fixed values and cannot be bypassed, preventing an unsafe condition with reduced air than commissioned. The minimum feedback variation applies to both the upper and lower limits so the total commission must allow for the two combined.

Mk8 MM Manual Page | 81 3.4.8 Set GOLDEN START Position If Golden Start has been enabled in option 29 on a new system which has not been commissioned, the message ‘Set Golden Start Position’ will display after the START position has been entered. Figure 3.4.8.i Set GOLDEN START Position Press to enter the GOLDEN START position. After entering the GOLDEN START position, proceed to the commissioning steps in section 3.4.9 if FGR START has been enabled, or 3.4.10 if no FGR START is enabled. Enabling Golden Start on a Commissioned System If the system has already been commissioned without Golden Start enabled, go into Commission mode and set option 29 to enable Golden Start. The forced commission message will appear as ‘Golden Start optioned but not commissioned.’ Press on the home screen and once the system goes through its internal relay tests, the message ‘Select Commissioning’ will appear. Press to go through the commissioning process and enter the CLOSED, OPEN and light-off START positions. After the entering the light-off START position, the message ‘Set Golden Start Position’ will appear; press to enter the stored GOLDEN START position and continue with the full commissioning procedure. in section 3.4.9 if FGR START has been enabled, or 3.4.10 if no FGR START is enabled. Alternatively, to just add the Golden Start position and not go through the whole commissioning procedure, press on the home screen, and once the system has gone through its internal relay tests the

Mk8 MM Manual Page | 82 message ‘Select Commissioning’ will appear. Press and the MM will go through purge. The message ‘Set up START position’ will appear to ignite a flame in the burner, see section 3.4.4. Once the burner is firing, the message ‘Set Golden Start Position’ will appear. Press to enter the GOLDEN START position. The message ‘Save Commission’ will appear, press to save the GOLDEN START position and then press to return to run mode. Note: If FGR START has also been enabled, this positon must be entered after the GOLDEN START position. The Golden Start position of the fuel and air servomotors is completely independent from the modulating load index and commissioned value data. The facility is particularly useful on combustion systems with large turndowns and when firing heavy oil, as it enables the burner to start/ignite at a fuel rich position and then, after a stable flame is established, return to the commissioned combustion curve. The Golden Start position needs to be entered for each required fuel. The MM holds the Golden Start position for a time set in Parameter 15; this time starts from the point of main flame. After this time, if the Golden Start fuel position is between Low Fire and High Fire, the air damper will open and the fuel valve will stay in the same position, until fuel/air ratio is on the commissioned combustion curve. If the Golden Start fuel position is outside of the main curve, then both the air damper and fuel will go to the Low Fire position. Once on the commission curve, the MM will modulate as per load requirement. Golden Start can be set in Option 29 to start from first ignition instead of after the main flame stabilisation phase has passed, this is particularly useful for briefly providing additional fuel when starting an oil flame with direct spark (no pilot mode – see option 111)

Mk8 MM Manual Page | 83 3.4.9 Set FGR Position If FGR Start has been enabled in options 48, 49 or 50 on a system which has not been commissioned, the message ‘Set FGR Position’ will display after entering the light-off START position. If Golden Start has been enabled in option 29, this message will appear after entering the GOLDEN START position. Figure 3.4.9.i Set FGR Position Press to enter the FGR START position. After entering the FGR START position, proceed to the commissioning steps in section 3.4.10. Enabling FGR Start on a Commissioned System If the system has already been commissioned without FGR Start enabled, go into Commission mode and set option 48, 49 or 50 to enable FGR Start. The forced commission message will appear as ‘FGR optioned but not commissioned.’ Press on the home screen and once the system goes through its internal relay tests, the message ‘Select Commissioning’ will appear. Press to go through the commissioning process and enter the CLOSED, OPEN, light-off START and GOLDEN START (if enabled) positions. After the entering the light-off START or GOLDEN START (if enabled) position, the message ‘Set FGR Position’ will appear; press to enter the stored FGR START position and continue with the full commissioning procedure in section 3.4.10. Alternatively, to just add the FGR Start position and not go through the whole commissioning procedure, press on the home screen, and once the system has gone through its internal relay tests the

Mk8 MM Manual Page | 84 message ‘Select Commissioning’ will appear. Press and the MM will go through purge. The message ‘Set up START position’ will appear to ignite a flame in the burner, see section 3.4.4. Once the burner is firing, the message ‘Set FGR Position’ will appear. Press to enter the FGR START position. The message ‘Save Commission’ will appear, press to save the FGR START position and then press to return to run mode. Note: If both Golden Start and FGR are optioned then the GOLDEN START position is entered before the FGR START position. Flue Gas Recirculation (FGR) is a method whereby a quantity (approximately 15%) of the boiler flue gases are fed back to the burner and mixed with the combustion air. The virtue of FGR is the reduction of NOx gases. With the FGR facility, servomotor channel 3 can be used to control the amount of flue gas fed back. It is not good practice to feed back the gases when the flue gas is cold, so all the elements (i.e. servomotors and VSD) can be set at ‘FGR’ positions until the gases are hot. During this time the CH3 would normally be set closed. Once the FGR holding conditions are met, modulation takes place in the normal way using the curve entered during commissioning. FGR can be set as a Timer, Offset or Temperature Threshold (see options 48, 49 and 50). Note: Golden start takes priority over FGR. Once the golden start timer has finished, the servomotors will go straight to the FGR start position.

Mk8 MM Manual Page | 85 3.4.10 Set HIGH Position Figure 3.4.10.i Set HIGH Position Once all the START, GOLDEN START and FGR START positions have been entered, the message ‘Set HIGH Position’ will appear. Press and drive the servomotors (and VSD if optioned) to the HIGH position by opening the air damper and fuel valve some degrees alternatively, so that more fuel is added gradually. It is not possible to enter the HIGH position higher than the OPEN position. The servomotors must be driven 0.5° up/down from the previous point initially, before entering the next point, the fuel. Press to store this HIGH position. WARNING: IT IS THE RESPONSIBILITY OF THE COMMISSIONING ENGINEER TO ENSURE THAT THE FLAME IS SAFE AND THERE IS A GOOD COMBUSTION AT ALL TIMES DURING COMMISSIONING.

Mk8 MM Manual Page | 86 3.4.11 Set INTER Position Figure 3.4.11.i Set INTER Position Once the HIGH position has been entered, the message ‘Set INTER Position’ will appear. Press to drive the servomotors (and VSD) to the first INTER positon. The message ‘Move fuel and air positions’ will appear at first, as the system must detected a 0.5O movement on CH1 and CH2 before an INTER position can be entered. Press to store this INTER position. There must be a minimum of 3 INTER points entered on the fuel-air curve, and a maximum of 18. Points can be added/removed in Single Point Change mode (see section 3.6). Continue this process until all the required INTER points have been entered.

Mk8 MM Manual Page | 87 3.4.12 Set INTER or START Position Figure 3.4.12.i Set INTER or START Position Once the minimum 3 INTER points have been added, you will be prompted to either enter another INTER point or the START/LOW FIRE position. Press to drive the servomotors (and VSD) to the START/ LOW FIRE position, and then press to store this. Note: If Golden Start or FGR Start are in use, the Start position is only used for Low Fire.

Mk8 MM Manual Page | 88 3.4.13 Save Commission 3.4.13.i Save Commission Once the START position has been entered, press to store this commission curve. The message ‘Commission Complete’ will appear and press to go normal firing mode. If the burner has been previously commissioned then the new saved curve will overwrite the previous data for the fuel selected. Failure to save the curve will result in the commissioning data not being stored within the unit and a power loss to the unit will result in a loss of data for the fuel selected. If during commissioning the burner turns off, due to the ‘running interlock’ opening or a fault, or if the power has been recycled, no points entered are stored. It is recommended to commission the MM with a quick base curve and then adjust/add/remove the points in the Single Point Change. Once the burner has been commissioned, the fuel flow metering will need to be entered, please go to section 3.5 Fuel Flow Commissioning. If there is EGA trim data to be added then continue to section 3.7 Single Point Change before section 3.5 Fuel Flow Commissioning. Note: If commissioning a fuel for the first time the default required setpoint will be 2.0bar/20PSI/20OC/20OF. The burner will shut down at commission completion due to the low default required setpoint. Go to the Status screen to change the required setpoint.

Mk8 MM Manual Page | 89 3.5 Fuel Flow Metering If fuel flow metering has been enabled in option 57, the message ‘No Fuel Flow Data’ will display on the Home screen once the burner has been commissioned. Fuel flow metering is used to rate the size or burner and calculate the firing rate. If fuel flow metering is not commissioned and sequencing is optioned, then MM will assume a default burner rating which is based on the fractional fuel valve angle. The fuel flow is commissioned from the low fire point up to the high fire point. The low fire point will set the burner rating in MW if metric of MMBTu/hr if imperial. On the Mk8 MM, fuel flow metering can be taken as the values entered in the fuel flow commissioning screen from the fuel flow meter or through a 4-20mA signal input on terminals EX- and EX+. 3.5.1 Commissioning Fuel Flow Through MM If a fuel flow meter is not available and only arbitrary values are going to be used, it is important to make sure a good range of values are is entered (e.g. 1 to 10) with equal spaces between the values. Not doing this could lead to problems when using IBS and the flame graphic. When using arbitrary values it is good practice to use the following calculation to determine the heat value for each of the 10 points. 𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 𝐵𝐵𝑒𝑒𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃= 𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵 𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅− ቀ𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵 𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇 ቁ 9 For example: Burner Rating: 5.4MW; Turndown Ratio: 5:1. 5.4 −(5.4 5 ) 9 = 0.48 Giving the range (5.40, 4.92, 4.44, 3.96, 3.48, 3.00, 2.52, 2.04, 1.56, 1.08), with 1.08MW as the low fire point and 5.4MW as the high fire burner rating point derived using an estimated burner turndown value. Fuel flow metering serves to totalise the amount of fuel being used at each position. If any changes are made to the curve through Single Point Change, then fuel flow will need to be re-commissioned. Enable Fuel flow commissioning by setting option 57. Fuel flow commissioning is done in Run mode while the burner is firing. On the Home Screen, press to access the System Configuration screen.

Mk8 MM Manual Page | 90 Figure 3.5.1.i System Configuration Screen On the System Configuration screen press . You will be prompted to enter the Online Change password. Press to access the Online Changes screen.

Mk8 MM Manual Page | 91 Figure 3.5.iii Fuel Flow Commissioning Press to access the fuel flow commissioning screen. There are 10 points which need to be entered across the commission curve from low to fire high fire, with low fire being point 1, and high fire point 10. Type in the heat value or ‘dummy value’ using the keypad and press the return key to save that point. Note: The servomotors will drive to the low fire position, and then drive up as the fuel flow commissioning points are entered. Precautions must be taken to ensure that the boiler is warm enough for all 10 points to be entered. As you enter the heat values for the 10 points, these will become marked on the graph to the right of the screen. Once the fuel flow commissioning is complete, press to return to modulation in normal firing mode. If you press at any time during fuel flow commission, this will not store the points. 3.5.2 Commissioning Fuel Flow Through 4-20mA Feedback If fuel flow metering is enabled through using 4-20mA feedback on terminals EX- and EX+, the heat value will automatically get populated according to the analogue signal at that fuel valve position. After each heat value is displayed, press enter to go to the next fuel flow point.

Mk8 MM Manual Page | 92 3.5.3 Calorific Fuel Data Stats Kerosene SG Gas Oil CI/SH Light fuel Oil SG Medium fuel Oil SG Heavy Fuel Oil SG Relative density 15.6°C (60°F) approx. / = litres x = kg 0.79 0.835 0.93 0.94 0.96 Flash point (closed) min °C (°F) 37.8 (100) 65.6 (150) 65.6 (150) 65.6 (150) 65.6 (150) Viscosity kinematic (cSt) at 15.6°C (60°F) approx. 2.0 - - - - 37.8°C (100°F) approx. - 3.0 - - - 82.2°C (180°F) approx. - - 12.5 30 70 Equivalent Redwood No.1 Viscosity at 37.8°C (100°F) - 33 approx 250 max 1000 max 3500 max Freezing point °C / °F Below -40 Below -40 Below -40 Below -40 Below -40 Cloud point °C max - -2.2 - - - Gross calorific values KJ/kg approx. 46,520 45,590 43,496 43,030 42,800 Btu/lb approx. 20,000 19,600 18,700 18,500 18,400 KWh/litre approx. 10.18 10.57 11.28 11.22 11.42 Therms/gallon approx. 1.58 1.64 1.75 1.74 1.77 kW/kg - 12.66 12.08 - 11.89 Sulphur content % wt. 0.2 0.6 2.3 2.4 2.5 Water content % vol. Negligible 0.05 0.10 0.20 0.30 Sediment content % wt - Negligible 0.20 0.03 0.04 Ash content % wt - Negligible 0.02 0.03 0.04 Mean specific heat between 0°C - 100°C approx. 0.50 0.49 0.46 0.45 0.45 Volume correction factor per 1°C 0.00083 0.00083 0.0007 0.0007 0.00068 Volume correction factor per 1°F 0.00046 0.00046 0.00039 0.00039 0.00038 Btu/U.S. gallon (US standard) - 140,000 - 150,000 160,000 Lb/U.S. gallon (US standard) - 7.01 - - 7.01 % lighter than water 20% 4% 1 u.s. Gallon of oil / ft of air 1402

Mk8 MM Manual Page | 93 3.5.4 Conversion Factor for Imperial Gas Flow Meters Required Data: Pressure of gas at meter in “wg Required gas flow in ft³/min Calculations: Correction factor = (pressure of gas at meter x 0.00228 ) + 0.948 Reading on gas meter = required gas flow / correction factor Example: Pressure of gas at meter = 58” wg Required gas flow = 95 ft³/min Conversion factor = (58 x 0.00228) + 0.948 = 1.08 Reading on Meter = 95 / 1.08 = 88 ft³/min 3.5.5 Correction Factor for Burners Significantly Above Sea Level Note: Above sea level i.e. >200m (1ft = 0.3048m) Height above sea level in meters, Calculation for correction factor: = (Pressure of gas at meter x 0.00228) + (0.948 – (height above sea level x 0.0001075)) Example: As above but 250 m above sea level: Correction factor = (58x0.00228) + (0.948 – (250 x 0.0001075)) = 1.05

Mk8 MM Manual Page | 94 3.5.6 Gas Volume Conversion Factors Assumed gas temperature 10 °C 50 °F Standard pressure e 760 mmHg 101.3612 Kpa Standard temperature 15.56 °C Ambient pressure 101.325 Kpa Wg " PSI mmH2O mmHg Kpa mBar Conversion factor 1 0.036 25.4 1.867 0.249 2.49 1.0218 2 0.072 50.8 3.734 0.498 4.98 1.0243 3 0.108 76.2 5.601 0.747 7.47 1.0268 4 0.144 101.6 7.468 0.996 9.96 1.0293 5 0.181 127 9.335 1.245 12.451 1.0318 6 0.217 152.4 11.202 1.494 14.941 1.0343 7 0.253 177.8 13.069 1.743 17.431 1.0368 8 0.289 203.2 14.936 1.993 19.921 1.0393 9 0.325 228.6 16.804 2.242 22.411 1.0418 10 0.361 254 18.671 2.491 24.901 1.0443 15 0.542 381 28.006 3.736 37.352 1.0569 20 0.722 508 37.341 4.981 49.802 1.0694 25 0.903 635 46.677 6.227 62.253 1.0819 30 1.083 762 56.012 7.472 74.703 1.0944 35 1.264 889 65.347 8.717 87.154 1.107 40 1.444 1016 74.682 9.963 99.604 1.1195 45 1.625 1143 84.018 11.208 112.055 1.132 50 1.805 1270 93.353 12.453 124.505 1.1445 55 1.986 1397 102.688 13.699 136.956 1.1571 60 2.166 1524 112.024 14.944 149.406 1.1696 65 2.347 1651 121.359 16.189 161.857 1.1821 70 2.527 1778 130.694 17.435 174.307 1.1947 75 2.708 1905 140.03 18.68 186.758 1.2072 80 2.889 2032 149.365 19.925 199.208 1.2197 85 3.069 2159 158.7 21.171 211.659 1.2322 90 3.25 2286 168.035 22.416 224.109 1.2448 95 3.43 2413 177.371 23.661 236.56 1.2573 100 3.611 2540 186.706 24.907 249.01 1.2698 110 3.972 2794 205.377 27.397 273.911 1.2949 120 4.333 3048 224.047 29.888 298.812 1.3199 130 4.694 3302 242.718 32.379 323.713 1.345 140 5.055 3556 261.388 34.869 348.614 1.37 150 5.416 3810 280.059 37.36 373.515 1.3951 160 5.777 4064 298.73 39.851 398.416 1.4201 170 6.138 4318 317.4 42.341 423.317 1.4452 180 6.499 4572 336.071 44.832 448.218 1.4703 190 6.86 4826 354.741 47.323 473.119 1.4953 200 7.221 5080 373.412 49.813 498.02 1.5204

Mk8 MM Manual Page | 95 How to use this information: 1. Measure Volumetric flow of gas for 1min in ft3 (i.e. ft3/min). Note 1m3 = 35.31ft3 2. Multiply this volume flow by 60 to give volumetric flow per hour (i.e. ft3/hr). 3. Measure the pressure of the gas supply. 4. Use the table above to obtain a conversion factor. 5. Multiply the volume flow per hour by the conversion factor to obtain a volume at reference conditions. 6. For natural gas, the calorific value is typically 1000 Btu/ft3. To obtain the firing rate of the boiler at standard reference conditions multiply the volume at reference conditions by 1000. Represented as an equation: Firing rate = (Measured Volumetric flow per minute x 60 x Conversion factor x 1000) Btu/hr

Mk8 MM Manual Page | 96 3.6 Gas/ Air Pressure Commission To commission the gas pressure sensor, go to Commission Mode and press . The MM will then run through the points to store the gas pressure values. If the VPS is optioned on, the unit will run through this valve proving process. The MM will go from Low Fire to High Fire and store the gas pressure values along the curve. Once these values are stored, the upper and lower offset limits will be adjusted to the new commissioned gas pressure values. If the burner turns off during the gas/air pressure commission, the gas/air pressure commission process will be restarted. This ensures that the MM does not run with an incomplete set of gas/air pressure readings. Figure 3.6.i Gas Sensor To commission the air pressure sensor, in Commission Mode screen press . The air pressure sensor commission procedure is the same as the gas pressure sensor commission procedure. The same procedure also applies for commissioning the oil pressure sensor. Note: If the gas or air pressure sensor is replaced with the same sensor type (same pressure range) then the sensor will not need to be recommissioned. Note: For applications where VPS is required after burner shutdown only, the option/parameter 129 should be set to 0 when doing the first gas sensor commission on the system to store the valve proving gas pressure. During normal running, option/parameter 129 can be set to 1.

Mk8 MM Manual Page | 97 3.7 Single Point Change Figure 3.7.i Single Point Change Single Point Change can only be accessed when the burner is firing and in Run mode. Press in the system configuration screen and enter the password to access Single Point Change mode. Select the point to be edited or added trim to by pressing or to go up and down the fuel curve, then press . The Status screen will display the message ‘Select change to make’.

Mk8 MM Manual Page | 98 Figure 3.7.ii Changes To edit a previously entered point press and make adjustments to the positions as needed (see Figure 3.7.iiii). To enter a new point press . To delete a point on the curve, move to a point below that one to be deleted and press Press to confirm the change. Note: It is not possible to delete LOW or HIGH FIRE positions or have less than 3 INTER points.

Mk8 MM Manual Page | 99 Figure 3.7.iii Changing a point in single point change Press to edit the fuel, air and/or VSD commissioned value of that point. Once the changes have been made, press to save this position. If a point is overwritten, the trim data is cleared and the trim data will need to be added. Press to remove the point; there must be a minimum of 3 INTER points.

Mk8 MM Manual Page | 100 To add trim data to a point press , see section 3.4.6. Figure 3.7.iv Single Point Change – Trim The MM will store the trim values for this position.