ACV Prestige ACVMax Application Supplement

This document is intended to be used by a factory trained and qualified heat- ing contractor or service technician only. Read all instructions within this document and within the PRESTIGE Boiler Installation and Maintenance Manual before proceeding. It is recommended to follow the procedures in the steps given. Skipping or missing procedural steps could result in severe personal injury, death or substantial property damage. prestige Control Application Supplement - ACVMax Revised 12/15/2015 L I S T E D WARNING 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 1

i PRODUCT AND SAFETY INFORMATION Definitions ................................................................................................................1 1.0 - OPERATING INFORMATION 1.1 Entering Installer Access Code ......................................................................2 1.2 ACVMax Installer Menu Structure..................................................................3 2.0 - CH SETTINGS 2.1 Navigation ...............................................................................................5 2.2 Heating Operation ..........................................................................................5 2.3 Demand Type ...............................................................................................5 2.4 Absolute Max CH Setpoint.............................................................................6 2.5 CH1 Maximum Setpoint .................................................................................6 2.6 CH1 Minimum Setpoint ..................................................................................6 2.7 Outdoor Curve Coldest Day...........................................................................6 2.8 Outdoor Curve Warmest Day.........................................................................7 2.9 CH2 Circuit ...............................................................................................7 2.10 CH2 Maximum Setpoint .................................................................................7 2.11 CH2 Minimum Setpoing .................................................................................7 2.12 Warm Weather Shutdown ..............................................................................7 2.13 Circulation Pump Permanent .........................................................................8 2.14 CH Post Pump Time ......................................................................................8 2.15 Freeze Protection...........................................................................................8 2.16 Frost Protection Setpoint................................................................................9 2.17 Parallel Shift Value.........................................................................................9 2.18 CH Call Blocking ............................................................................................9 3.0 - DHW SETTINGS 3.1 Navigation ...............................................................................................10 3.2 DHW Operation..............................................................................................10 3.3 Demand Type ...............................................................................................10 3.4 Boiler DHW Setpoint ......................................................................................11 3.5 DHW Setpoing ...............................................................................................11 3.6 DHW On Differential.......................................................................................11 3.7 DHW Storage Adder.......................................................................................12 3.8 DHW Post Pump Time ...................................................................................12 3.9 DHW Priority Timeout.....................................................................................12 3.10 DHW Priority ...............................................................................................12 3.11 DHW Call Blocking.........................................................................................13 3.12 DHW To CH Call Blocking..............................................................................13 3.13 Antilegionella Function ...................................................................................14 4.0 - BOIlER SETTINGS 4.1 Navigation ...............................................................................................15 4.2 Prestige Model ...............................................................................................15 4.3 Lockout Temp. ...............................................................................................15 4.4 Modbus Address ............................................................................................16 4.5 Pump Settings ...............................................................................................16 4.5.1 Current Pump Configuration ..........................................................16 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 2

ii 4.5.2 Preset Pump Configuration (Solo) .................................................16 4.5.3 Preset Pump Configuration (Excellence).......................................16 4.5.4 Flexible Pump Configuration..........................................................16 4.5.5 Flex. Relay Configuration...............................................................17 4.5.6 Error Relay.....................................................................................17 4.6 Ignition Level NAT..........................................................................................17 5.0 - RESET All SETTINGS 5.1 Navigation ...............................................................................................36 6.0 - FACTORY ACVMAx SETTINGS 6.0 Factory ACVMax Settings ..............................................................................37 7.0 - CASCADE 7.1 Cascade Operating Information .....................................................................38 7.2 ACVMax Cascade Menu Structure ................................................................39 7.3 Cascade Installation.......................................................................................40 7.3.1 System Piping ................................................................................40 7.3.2 System Sensor Installation ............................................................40 7.3.3 Cascade Communication Cable ....................................................41 7.3.4 Low Voltage Wiring Connections ...................................................41 7.3.5 Line Voltage Wiring Connections...................................................42 7.3.6 Cascade Autodetection ..................................................................42 7.3.7 Lockouts.........................................................................................43 7.4 Cascade Information ......................................................................................50 7.4.1 Navigation ......................................................................................50 7.4.2 System Temperature Logging........................................................50 7.5 Cascade Settings ...........................................................................................51 7.5.1 Navigation ......................................................................................51 7.5.2 Stage Delay ...................................................................................51 7.5.3 Minimum Firing Rate......................................................................51 7.5.4 Boiler Enabling Algorithm...............................................................52 7.5.5 Boiler Disabling Algorithm..............................................................52 7.5.6 Maximum Firing Rate.....................................................................52 7.5.7 CH/DHW Boilers ............................................................................53 7.5.8 Automatic Rotation.........................................................................53 7.5.9 CH Proportional Gain.....................................................................54 7.5.10 CH Integral Gain ............................................................................54 7.5.11 DHW Proportional Gain .................................................................55 7.5.12 DHW Integral Gain.........................................................................56 8.0 - MODBUS INTERFACE 8.0 Modbus Interface ...........................................................................................57 9.0 - MANUAl OPERATION 9.1 Navigation ...............................................................................................59 9.2 Fan ...............................................................................................59 9.3 CH1 ...............................................................................................59 9.4 DHW ...............................................................................................59 9.5 CH2 ...............................................................................................59 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 3

iii 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 4

1 The following terms are used throughout this manual to bring attention to the presence of potential hazards or to important information concerning the product. Indicates the presence of a hazardous situa- tion which, if ignored, will result in death, serious injury or substantial property dam- age. Indicates a potentially hazardous situation which, if ignored, can result in death, serious injury or substantial property damage. Indicates a potentially hazardous situation which, if ignored, may result in minor injury or substantial property damage. Indicates special instructions on installation, operation or maintenance, which are impor- tant to the equipment but not related to per- sonal injury hazards. Indicates recommendations made by ACV- Triangle Tube for the installers which will help to ensure optimum operation and longevity of the equipment. WARNING NOTICE CAUTION DANGER BEST PRACTICE DEFINITIONS IMPORTANT INFORMATION - READ BEFORE PROCEEDING This document is intended to be used by a fac- tory trained and qualified heating contractor or service technician only. Read all instructions within this document and within the PRES- TIGE Boiler Installation and Maintenance Manual before proceeding. It is recommended to follow the procedures in the steps given. Skipping or missing procedural steps could result in severe personal injury, death or sub- stantial property damage. WARNING ACV-Triangle Tube reserves the right to modify the technical specifications and components of its product without prior notice. NOTICE This Control Application Supplement applies to ACVMax controls with the following soft- ware version numbers: Display SWv.1.22 Burner Controller SW v.0.30 The software version numbers are displayed on the initial screen after turning on the unit. NOTICE 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 1

itors and controls the Prestige to operate as efficiently as possible. ACVMax monitors the boiler sup- ply, return and flue gas temperatures and operates the igniter, gas valve and blower. ACVMax uses this information to modulate the boiler’s firing rate to maintain the required setpoint. ACVMax offers many advanced control options, which may be adjusted for various applications to achieve optimum boiler efficiency and operation. • Two central / space heating (CH) call inputs with separate outdoor reset curves. • Two temperature central/space heating (CH) temperature control via optional mixing valve. • Domestic Hot Water (DHW) call input with optional priority. • System temperature sensing and control with an optional system temperature sensor. • Cascade function allows up to six Prestige boilers to operate together in a single heating system. • Modbus interface for integrating with building management systems. These advanced features are adjustable in the Installer Menu after entering an access code. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 2

Installer Button The INSTALLER button (the small round button) provides the installing contractor with full access to all available features after entering an access code. ENTER INSTALLER ACCESS CODE 05[4] Entering installer access code procedure 1. Press the round INSTALLER button. 2. Enter the installer access code “054” by using the LEFT and RIGHT buttons to select a digit and the UP and DOWN buttons to change the digit. Press the OK button to enter the access code. 3. The Installer Menu will be displayed after successfully entering the access code. The Home Screen will be displayed if the access code is not entered correctly. Entering the installer access code allows the installer to make adjust- ments for 30 minutes. After 30 minutes, the access code will need to be entered again to make any adjustments. The Installer Menu is divided into four sections: 1. CH & DHW Settings – Allows the installer to adjust the boilers central / space heating, domestic hot water and boiler settings for the application. See pages 5 through 35. 2. Manual Operation – The burner and circulators can be manually enabled for testing. See page 59. 3. Reset All Settings – Resets all CH, DHW, Boiler, and Cascade Settings back to the factory defaults. See pages 36 through 37. 4. Cascade – Allows the installer to setup, adjust, and monitor the Cascade System. See pages 38 through 56. NOTICE CH & DHW Settings Fig. 1: ACVMax Navigation Buttons 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 3

Home Screen ENTER INSTALLER ACCESS CODE 05[4] CH & DHW Settings Menu Reset All Settings Cascade Menu Manual Operation Installer Menu Installer Access Code CH Settings Reset All Settings Press OK to restore factory settings, any other button to keep current settings Cascade Info. Manual Operation Released Of Of Of CH1 FAN DHW CH2 Home - return to home screen Back - return to previous screen 1.2 ACVMax Installer Menu Structure 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 4

The CH Settings menu contains settings related to central heating oper- ation. Each line contains a CH Setting followed by its current value. Six CH Settings are displayed on the screen at one time. Press the UP or DOWN buttons to scroll through additional CH Settings. 2.2 Heating Operation Default: Enabled Heating Operation allows the central heating function to be enabled and disabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled - The Prestige will respond to a central heating call. • Disabled - The Prestige will not respond to a central heating call. The heating operation disabled icon ( ) is displayed on the home screen when central heating operation has been disabled. Freeze protection will remain enabled when Heating Operation is Disabled. 2.3 Demand Type Default: Thermostat & Outd. Curve Demand Type allows the installer to select how a CH Demand is generat- ed. Press the UP or DOWN buttons to select the CH Demand Type then press the OK button to store the setting. The CH Demand options are: • Thermostat & Outd. Curve – A central heating call from a dry contact switch will enable the Prestige and the setpoint will vary with the outdoor temperature for central heating calls. • Thermostat & Setpoint - A central heating call from a dry contact switch will enable the Prestige and the setpoint will be fixed for central heating calls. • Constant & Outdoor Curve - The Prestige will maintain setpoint and the central heating circulators will be constantly enabled with- out an external call from a dry contact switch. The central heating circulators will be disabled when the outdoor temperature exceeds the Warm Weather Shutdown Temperature setting. The setpoint will vary with the outdoor temperature for central heating calls. • Constant & Setpoint - The Prestige will maintain setpoint and the central heating circulators will be constantly enabled without an external call from a dry contact switch. The central heating circula- tors will be disabled when the outdoor temperature exceeds the Warm Weather Shutdown Temperature setting. The setpoint will be fixed for central heating calls. • 0-10V Modulation Signal – This option allows the Prestige firing rate to be controlled by an external control system with a 0-10 VDC signal. Heating Settings Heating Operation Demand Abs. Max CH Setpoint CH1 Max. Setpoint CH1 Min. Setpoint Outdoor Curve / Coldest Day Enabled Thermostat & Outd. Curve 188ºF 180ºF 120ºF 10ºF Heating Operation Disabled Enabled Demand Type Thermostat & Outd. Curve Thermostat & Setpoint Constant & Outdoor Curve Constant & Setpoint 0-10V Modulation Signal 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 5

Default: 188°F [87°C] Absolute Max CH Setpoint can be used to prevent a user from adjusting the central heating setpoint or outdoor reset curve above a safe operating tem- perature in the EZ Setup Menu. A warning screen will be displayed in EZ Setup if the user attempts to raise the setpoint above the Absolute Max CH Setpoint. The Absolute Max CH Setpoint will be displayed on the outdoor reset curve in EZ Setup if the user selects an outdoor reset curve which goes above the Absolute Max CH Setpoint. Press the LEFT or RIGHT buttons to adjust the Absolute Max CH Setpoint then press the OK button to store the setting. 2.5 CH1 Maximum Setpoint Default: 176°F [80°C] CH1 Maximum Setpoint is the maximum setpoint for a CH1 heating call when an Outdoor Curve option is chosen in Demand Type. CH1 Maximum Setpoint is the fixed setpoint for a CH1 heating call when a Setpoint option is chosen in CH Demand. Press the LEFT or RIGHT buttons to adjust the CH1 Maximum Setpoint then press the OK button to store the setting. 2.6 CH1 Minimum Setpoint Default: 80°F [27°C] CH1 Minimum Setpoint is the minimum setpoint for a CH1 heating call when an Outdoor Curve option is chosen in Demand Type. This setting is not applicable when a Setpoint option is chosen in Demand Type. CH1 Minimum Setpoint must be set equal to or below the CH1 Maximum Setpoint. Press the LEFT or RIGHT buttons to adjust the CH1 Minimum Setpoint then press the OK button to store the setting. 2.7 Outdoor Curve Coldest Day Default: 10°F [-12°C] Outdoor Curve Coldest Day is the coldest outdoor design temperature of the heating system when an Outdoor Curve option is chosen in Demand Type. This setting is not applicable when a Setpoint option is chosen in Demand Type. Press the LEFT or RIGHT buttons to adjust the Outdoor Curve Coldest Day then press the OK button to store the setting. 68ºF 188ºF 176ºF CH1 Max. Setpoint 60ºF 188ºF 80ºF CH1 Min. Setpoint -30ºF 50ºF 10ºF Outdoor Curve Coldest Day 68ºF 188ºF 188ºF Abs. Max CH Setpoint 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 6

Default: 64°F [18°C] Outdoor Curve Warmest Day is the warmest outdoor design temperature of the heating system when an Outdoor Curve option is chosen in Demand Type. This setting is not applicable when a Setpoint option is chosen in Demand Type. Press the LEFT or RIGHT buttons to adjust the Outdoor Curve Warmest Day then press the OK button to store the setting. 2.9 CH2 Circuit Default: Enabled CH2 Circuit allows the CH2 Maximum and Minimum Setpoints to be enabled and disabled. When disabled, the CH2 heating call will operate using the CH1 Maximum and Minimum Setpoints. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled – A CH2 heating call will use CH2 Maximum and Minimum Setpoints. • Disabled – A CH2 heating call will use CH1 Maximum and Minimum Setpoints. 2.10 CH2 Maximum Setpoint Default: 140°F [60°C] CH2 Maximum Setpoint is the maximum setpoint for a CH2 heating call when an Outdoor Reset option is chosen in CH Demand. CH2 Maximum Setpoint is the fixed setpoint for a CH2 heating call when a Setpoint option is chosen in CH Demand. Press the LEFT or RIGHT buttons to adjust the CH2 Maximum Setpoint then press the OK button to store the setting. 2.11 CH2 Minimum Setpoint Default: 80°F [27°C] CH2 Minimum Setpoint is the minimum setpoint for a CH2 heating call when an Outdoor Reset option is chosen in CH Demand. This setting is not applicable when a Setpoint option is chosen in CH Demand. CH2 Minimum Setpoint must be set equal to or below the CH2 Maximum Setpoint. Press the LEFT or RIGHT buttons to adjust the CH2 Minimum Setpoint then press the OK button to store the setting. 2.12 Warm Weather Shutdown Default: OFF Warm Weather Shutdown allows the installer to enter an optional out- door temperature at which to disable the central heating function and any circulators placed into constant circulation with the Circulation Pump Permanent setting. The Prestige will continue to respond to a domestic hot water call or a 0-10V Modulation Signal when the out- door temperature exceeds the Warm Weather Shutdown Temperature setting. Press the LEFT or RIGHT buttons to adjust the Warm Weather Shutdown Temperature then press the OK button to store the setting. The Warm Weather Shutdown icon is displayed on the home screen when the outdoor temperature reaches the Warm Weather Shutdown Temperature. 60ºF 78ºF 64ºF Outdoor Curve Warmest Day CH2 / CV2 Circuit Disabled Enabled Off 78ºF Off Warm Weather Shutdown 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 7

Default: Disabled Circulation Pump Permanent allows the circulators configured for central heating calls in Pump Settings to be constantly enabled even without a central heating call. The Warm Weather Shutdown function will disable circulators enabled via this function. A domestic hot water call will cause the circulators to be disabled during the domestic call as long as DHW Priority is enabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled – The central heating circulators will be enabled for con- stant circulation without a central heating call. • Disabled – The central heating circulators will only be enabled dur- ing a central heating call. 2.14 CH Post Pump Time Default: 5 Minute CH Post Pump Time sets how long the circulators configured for central heating calls in Pump Settings will continue to operate at the completion of a heating call. The CH Post Pump feature allows the heat remaining in the boiler at the completion of a call to be sent to the heating system, which will improve the overall efficiency of the system. Press the LEFT or RIGHT buttons to adjust the CH Post Pump Time then press the OK button to store the setting. 2.15 Freeze Protection Default: Enabled Freeze Protection allows the freeze protection feature to be enabled and disabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled – The Freeze Protection feature is enabled to protect the boiler from freezing. This feature monitors the boiler water tem- perature and responds as follows when no call is present: - 46°F [8°C] – Circulators configured to respond to a CH1 Call are enabled. - 42°F [6°C] – Burner operates at low fire and ciculators configured to respond to a CH1 or CH2 Call are enabled. - 60°F [15°C] – Freeze protection ends. Burner & all pumps turn OFF after completing CH Post Pump Time. • Disabled – The Freeze Protection feature is disabled. Freeze Protection Enabled Disabled Circulation Pump Permanent Disabled Enabled Of 20 min 5 min CH Post Pump Time 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 8

tains antifreeze to prevent the system from freezing. Serious dam- age could occur to the Prestige as well as the entire heating system if Freeze Protection is disabled without antifreeze in the system. The Prestige should NEVER be installed in a location where freezing could occur. Subjecting the Prestige to freezing condi- tions could lead to freezing of the condensate possibly causing serious injury or death. 2.16 Frost Protection Setpoint Default: -22ºF [-30ºC] Frost Protection will enable the circulators configured for central heating calls in Pump Settings if the outdoor temperature falls below the Frost Protection Setpoint and no call is present. This feature requires using the outdoor temperature sensor and is always active and cannot be disabled. Press the LEFT or RIGHT buttons to adjust the Frost Protection Setpoint then press the OK button to store the setting. 2.17 Parallel Shift Value Default: 0°F [0°C] Parallel Shift allows the CH setpoint to be externally adjusted when a Constant option is chosen in CH Demand. When a Constant option is cho- sen in CH Demand, continuous CH1 and CH2 heating calls are generated. Simultaneous CH1 and CH2 calls will result in the Prestige operating at the highest CH1 or CH2 setpoint. The CH1 or CH2 Thermostat terminals with the highest setpoint will be used to adjust the setpoint. If the Thermostat terminals with the highest setpoint are open, the CH setpoint will decrease by the Parallel Shift Value. If the Thermostat terminals with the highest setpoint are closed, the CH setpoint will return to the highest CH1 or CH2 setpoint. Press the LEFT or RIGHT buttons to adjust the Parallel Shift Value then press the OK button to store the setting. 2.18 CH Call Blocking Default: 2 Minute CH Call Blocking sets the minimum time between burner firings for central heating calls. At the completion of a burner firing, the CH Call Blocking time will begin. The burner will not fire again until after the CH Call Blocking time has elapsed. The CH Call Blocking time only prevents the burner from firing, the central heating circulators will respond to a central heating call. This blocking time has no affect on domestic hot water calls. The CH Call Blocking feature prevents short cycling of the burner and extends the life of the burner components. Press the LEFT or RIGHT buttons to adjust the CH Call Blocking time then press the OK button to store the setting. WARNING WARNING -22ºF 50ºF -22ºF Frost Protection Setpoint 0ºF 144ºF 0ºF Parallel Shift Value 0 min. 30 min. 2 min. CH Call Blocking 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 9

The DHW Settings menu contains settings related to domestic hot water operation. Each line contains a DHW Setting followed by its cur- rent value. Six DHW Settings are displayed on the screen at one time. Press the UP or DOWN buttons to scroll through additional DHW Settings. 3.2 DHW Operation Default: Enabled DHW Operation allows the domestic hot water function to be enabled and disabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled - The Prestige will respond to a domestic hot water call. • Disabled - The Prestige will not respond to a domestic hot water call. The domestic hot water operation disabled icon is dis- played on the home screen when domestic hot water operation has been disabled. 3.3 Demand PRESTIGE Solo Default: Thermostat PRESTIGE Excellence Default: Sensor Demand Type allows the installer to select the type of device which will generate a domestic hot water call. Press the UP or DOWN buttons to select the DHW Demand Type then press the OK button to store the set- ting. The DHW Demand options are: • Thermostat - A domestic hot water call from an aquastat or dry contact switch will enable the Prestige with a fixed setpoint for a domestic hot water call. • Sensor - This option requires the use of Indirect Water Heater Sensor PSRKIT22 which is included with every PRESTIGE Solo. The PRESTIGE Excellence utilizes an Indirect Water Heater Sensor. The Prestige will monitor the DHW storage temperature and generate a domestic hot water call when the temperature drops below the DHW Setpoint - DHW On Differential. 3.0 DHW SETTINGS DHW Settings DHW Operation Demand DHW Boiler Setpoint DHW Setpoint DHW On Diferential DHW Storage Adder Enabled Thermostat 186ºF 140ºF 6ºF 46ºF DHW Operation Disabled Enabled 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 10

Default: 168ºF [76ºC] DHW Boiler Setpoint is the fixed boiler setpoint temperature during a domestic hot water call when the Thermostat option is chosen in DHW Demand. Press the LEFT or RIGHT buttons to adjust the DHW Boiler Setpoint then press the OK button to store the setting. 3.5 DHW Setpoint Default: 140°F [60°C] DHW Setpoint is the domestic hot water storage setpoint temperature when the Sensor option is chosen in DHW Demand. Press the LEFT or RIGHT buttons to adjust the DHW Setpoint then press the OK button to store the setting. The boiler setpoint is automatically set to the DHW Setpoint + DHW Storage Adder when the Sensor option is chosen in DHW Demand. The boiler setpoint is limited to 194°F [90°C]. 3.6 DHW On Differential Default: 6°F [3°C] DHW On Differential sets how far the DHW storage temperature must fall below the DHW Setpoint to create a domestic hot water call when the Sensor option is chosen in DHW Demand. The domestic hot water call will end when the DHW storage temperature rises above the DHW Setpoint. Press the LEFT or RIGHT buttons to adjust the DHW On Differential then press the OK button to store the setting. The DHW On Differential setting greatly affects the production of domestic hot water. A low setting could result in a rapid response to a domestic hot water call resulting in a potential scald hazard. It is strongly recommended that the installer uti- lize a thermostatic mixing valve on the hot water outlet of the Indirect Water Heater. Failure to comply could result in severe personal injury, death, or substantial property damage. NOTICE DANGER 3.0 DHW Settings 96ºF 188ºF 168ºF DHW Boiler Setpoint 4ºF 18ºF 6ºF DHW On Diferential 68ºF 176ºF 140ºF DHW Setpoint 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 11

Default: 46°F [25°C] DHW Storage Adder is used to compute the boiler setpoint when the Sensor option is chosen in DHW Demand. The boiler setpoint will be DHW Setpoint + DHW Storage Adder for a domestic hot water call. Press the LEFT or RIGHT buttons to adjust the DHW Storage Adder then press the OK button to store the setting. 3.8 DHW Post Pump Time Default: 2 Minute DHW Post Pump Time sets how long the circulators configured for domestic hot water calls in Pump Settings will continue to operate at the completion of a domestic hot water call. The DHW Post Pump feature allows the heat remaining in the boiler at the completion of a call to be sent to the Indirect Water Heater, which will improve the overall effi- ciency of the system. Press the LEFT or RIGHT buttons to adjust the DHW Post Pump Time then press the OK button to store the setting. 3.9 DHW Priority Timeout Default: Off DHW Priority Timeout allows the installer to enter an optional time limit that a domestic hot water call has priority over a central heating call when DHW Priority is set to Enabled. Press the LEFT or RIGHT buttons to adjust the DHW Priority Timeout then press the OK button to store the setting. 3.10 DHW Priority Default: Enabled DHW Priority allows the domestic hot water priority function to be enabled and disabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled- Domestic hot water calls will have priority over a central heating call. The boiler setpoint will be set to the domestic hot water setpoint during a domestic hot water call. The DHW circu- lator will be enabled and the heating circulators will be disabled during a domestic hot water call. • Disabled - Domestic hot water calls will not have priority over a central heating call. The boiler setpoint will be set to the domestic hot water setpoint when only a domestic hot water call is present. The boiler setpoint will be set to the highest setpoint when simul- 10ºF 54ºF 28ºF DHW Storage Adder Of 30 min. 2 min. DHW Post Pump Time Of 120 min. Of DHW Priority Timeout 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 12

DHW circulator will be enabled during a domestic hot water call. The heating circulators will be enabled during a central heating call. Simultaneous domestic hot water and central heating calls will result in the PRESTIGE operating at the highest target temper- ature when DHW Priority is set to Disabled. The use of a mixing device on the lower temperature zones may be required to pro- tect the lower temperature zones from damage. DHW Priority should only be set to Disabled when Prestige Model is set to Solo. Setting DHW Priority to Disabled when Prestige Model is set to Excellence will not disable DHW Priority. 3.11 DHW Call Blocking Default: 0 Minute DHW Call Blocking sets the minimum time between burner firings for domestic hot water calls. At the completion of a burner firing, the DHW Call Blocking time will begin. The burner will not fire again until after the DHW Call Blocking time has elapsed. The DHW Call Blocking time only prevents the burner from firing, the circulators configured for domestic hot water calls in Pump Settings will respond to a domestic hot water call. This blocking time has no affect on central heating calls. The DHW Call Blocking feature prevents short cycling of the burner and extends the life of the burner components. Press the LEFT or RIGHT buttons to adjust the DHW Call Blocking time then press the OK button to store the setting. 3.12 DHW To CH Call Blocking Default: 1 Minute DHW To CH Call Blocking sets the minimum time between a DHW burn- er firing and a CH burner firing. At the completion of a DHW burner fir- ing, the DHW to CH Call Blocking time will begin. The burner will not fire again for a central heating call until after the DHW To CH Call Blocking time has elapsed. The DHW To CH Call Blocking time only pre- vents the burner from firing, the circulators configured for central heating calls in Pump Settings will respond to a central heating call. This blocking time has no affect on domestic hot water calls. The DHW To CH Call Blocking feature prevents the burner from firing when switching from a domestic hot water call to a central heating call. This allows the remaining heat in the heat exchanger to be dissipated and potentially satisfy the cen- tral heating call. Press the LEFT or RIGHT buttons to adjust the DHW To CH Call Blocking time then press the OK button to store the setting. NOTICE WARNING 0 min. 30 min. 0 min. DHW Call Blocking 0 min. 30 min. 1 min. DHW to CH Call Blocking 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 13

ed at least once per week to prevent the growth of Legionella bacteria. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled- When the Thermostat option is chosen in DHW Demand, a domestic hot water call is generated for 15 minutes once per week to heat the Indirect Water Heater. When the Sensor option is cho- sen in DHW Demand, a domestic hot water call is generated until the DHW storage temperature reaches 140°F [60°C] once per week. When the Sensor option is chosen in DHW Demand, the weekly timer is reset whenever the DHW storage temperature reaches 140°F [60°C] to prevent unnecessary firings. This function will be active even if DHW Operation has been set to Disabled. • Disabled - The Prestige will only fire in DHW mode when a domestic hot water call is received. The Antilegionella Function should only be left enabled when an Indirect Water Heater is installed. Enabling the Antilegionella Function without an Indirect Water Heater will result in the Prestige firing once per week in DHW mode. This could cause a Manual Reset Hard Lockout resulting in sub- stantial property damage. The Antilegionella Function is most effective when the Sensor option is chosen in DHW Demand. The use of an Indirect Water Heater Sensor ensures that the domestic hot water is heated to 140°F [60°C] at least once per week. WARNING BEST PRACTICE Antilegionella Function Enabled Disabled 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 14

The Boiler Settings menu contains settings related to general boiler operation. Each line contains a Boiler Setting followed by its current value. 4.2 Prestige Model PRESTIGE Solo Default: Solo (2 pumps) PRESTIGE Excellence Default: Solo/Excel. 3 way valve Prestige Model selects between Solo with pump operation and Excellence with 3-way diverter valve operation. Press the UP or DOWN buttons to select Solo (2 pumps) or Solo/Excel. 3 way valve then press the OK button to store the setting. • Solo (2 pumps) - A CH Demand is satisfied using the circulators configured for central heating calls in Pump Settings. A DHW Demand is satisfied using the circulators configured for domestic hot water calls in Pump Settings. • Solo/Excel. 3 way valve - CH and DHW Demands are satisfied by the built-in circulator and 3 way diverter valve. Excellence units also require setting Demand Type to Sensor for correct DHW operation. 4.3 Lockout Temp. Default: 210°F [99°C] Lockout Temp. allows the High Boiler Temperature lockout (E3) to be temporarily adjusted down to 102°F [39°C] for inspector demonstra- tion. Press the UP or DOWN buttons to select 210°F [99°C] or 102°F [39°C] then press the OK button to store the setting. • 102°F [39°C] – A High Boiler Temperature lockout (E3) will occur when the boiler temperature reaches 102°F [39°C]. • 210°F [99°C] – A High Boiler Temperature lockout (E3) will occur when the boiler temperature reaches 210°F [99°C]. NOTICE 4.0 Boiler Settings Prestige Model Solo (2 pumps) Solo/Excel. 3 way valve Boiler Settings Prestige Model Lockout Temp. Modbus Address Pump Settings Ignition Level NAT Solo (2 pumps) 210ºF [99ºC] 0=BCST 3000rpm Lockout Temp. 102ºF [39ºC] 210ºF [99ºC] 4.0 BOILER SETTINGS 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 15

control system. Press the LEFT or RIGHT buttons to change the Modbus Address then press the OK button to store the setting. See Pages 57 & 58 for Modbus Interface information. 4.5 Pump Settings Pump Settings allows the selection or assigment of the appropriate pump configuration for the installation piping arrangement. The cur- rent pump configuration will be displayed in the first line. There are numerous preset configurations to select from and a flexible configu- ration mode. 4.5.1 Current Pump Configuration Current Pump Configuration displays the selected pump configuration or indicates that there is a custom pump configuration used by display- ing “Modified.” 4.5.2 Preset Pump Configuration Prestige Model: Solo Preset Pump Configuration will display thirteen options (Config 1 - Config 13) that correspond to specific hydraulic schemes. Please refer to Figs. 2 through 14 on pages 18-30. Press the UP or DOWN buttons to scroll through the options then press the OK button to store the set- ting. 4.5.3 Preset Pump Configuration Prestige Model: Excellence Preset Pump Configuration will display four options (Solo/Excellence 1 - Solo/Excellence 4) that correspond to specific hydraulic schemes. Please refer to Figs. 15 through 18 on pages 31-34. Press the UP or DOWN buttons to scroll through the options then press the OK button to store the setting. 4.5.4 Flexible Pump Configuration Flexible Pump Configuration allows the installer to customize the flex- ible relays to a specific installation arrangement that is not addressed in the Preset Pump Configuration options. There are a total of six Flexible Relays and an Error Relay setting that must be set. 0=BCST 247 0=BCST Modbus Address Pump Settings Current Pump Confg Preset Pump Confg Flexible Pump Confg Modifed Flexible Pump Confg Flex. Relay 1 (CH) Flex. Relay 2 (DHW) Flex. Relay 3 (P3) Flex. Relay 4 (ERR) Flex. Relay 5 (Flame) Flex. Relay 6 (P4) 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 16

Each relay function has several options that must be set for activation. Press the UP or DOWN buttons to scroll through the options then press the OK button to toggle between the On/Off status. At the end of the list is Save & Exit which will store the settings for the particular relay. • On - Activation of the relay will occur. • Off - Activation of the relay will not occur. The options are as follows: • CH1/CV1 - Relay is activated at CH 1 Demand. • CH2/CV2 - Relay is activated at CH 2 Demand. • DHW/ECS/SWW - Relay is actived at DHW Demand. • MIX OPEN - Mixing valve open input is activated. • MIX CLOSED - Mixing valve closed input is activated. • ERROR - Relay is activated on error. • FLAME - Relay is activated when appliance is running and a flame signal has been detected. • Save & Exit - Store all settings to appliance and return to previous screen. 4.5.6 Error Relay Error Relay allows the installer to select when to activate the Error Relay (alarm): • On Lockout, Blocking and Warning - Relay is activated at a non- volatile lock-out, at a blocking error (self-resetting), or at a warn- ing. • On Lock-out and Blocking - Relay is activated at a non-volatile lock-out or at a blocking error (self-resetting). • On Lock-out - Relay is actived at a non-volatile lock-out only. 4.6 Ignition Level NAT Ignition Level NAT allows the installer to change the ignition fan speed to accomodate varying site conditions. Press the LEFT or RIGHT but- tons to adjust the Ignition Level NAT then press the OK button to store the setting. Default values are: Flex. Relay 1 (CH) CH1 / CV1 CH2 / CV2 DHW / ECS / SWW MIX OPEN MIX CLOSE ERROR FLAME On Of Of Of Of Of Of Flex. Relay 1 (CH) CH2 / CV2 DHW / ECS / SWW MIX OPEN MIX CLOSE ERROR FLAME Save & Exit Of Of Of Of Of Of Error Relay On Lockout, Blocking and Warning On Lockout and Blocking On Lockout 1450rpm 4900rpm 3000rpm Ignition Level NAT Model Natural Gas Propane Solo 80 3000 rpm 3000 rpm Solo/Excellence 110 3500 rpm 3000 rpm Solo 155 3500 rpm 3350 rpm Solo 175 3500 rpm 3300 rpm Solo 250 3700 rpm 3000 rpm Solo 299/399 2600 rpm 2600 rpm 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 17

(# Fig. 2: System Piping with Solo Preset Config 1 4.0 Boiler Settings 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 18

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 19

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 20

(#   Fig. 5: System Piping with Solo Preset Config 4 4.0 Boiler Settings 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 21

(# Fig. 6: System Piping with Solo Preset Config 5 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 22

(#  Fig. 7: System Piping with Solo Preset Config 6 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 23

(#  $) $)*" $+   ,* $+#$ $%* $+#$  Fig. 8: System Piping with Solo Preset Config 7 Note: This Configuration to be used where the Low Temp Circuit is a micro load as the High Temp Circuit will run for any call on the Low Temp Circuit to prevent boiler cycling. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:36 AM Page 24

(# Fig. 9: System Piping with Solo Preset Config 8 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 25

(#  $) $)*" $+   ,* $+#$ $%* $+#$ Fig. 10: System Piping with Solo Preset Config 9 Note: This Configuration requires that the Low Temp Pump and High Temp Pump be connected in par- allel to the CH Pump Relay. An isolation relay is may be used to ensure the CH Pump Relay will not be overloaded during operation. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 26

(#  $) $)*" $+   ,* $+#$   $%* $+#$ Fig. 11: System Piping with Solo Preset Config 10 Note: This Configuration to be used where the Low Temp Circuit is a micro load as the High Temp Circuit will run for any call on the Low Temp Circuit to prevent boiler cycling. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 27

(#  $) $)*" +* $,#$   $%* $,#$ Fig. 12: System Piping with Solo Preset Config 11 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 28

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 29

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 30

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 31

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 32

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 33

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 34

2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 35

36 5.1 Navigation: Home Screen>Installer Menu>Reset All Settings Reset All Settings allows the installer to reset all CH, DHW, Boiler and Cascade settings back to the original PRESTIGE Solo factory defaults. Follow the onscreen instructions to reset all settings back to the original factory defaults. PRESTIGE Excellence units require setting Prestige Model to Solo/Excel. 3 way valve and DHW Demand Type to Sensor after using the Reset All Settings function. NOTICE 5.0 RESET ALL SETTINGS Reset All Settings Press OK to restore factory settings, any other button to keep current settings. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 36

37 6.0 FACTORY ACVMAX SETTINGS Section Setting Factory Default Minimum Setting Maximum Setting EZ Setup Reset Installer Reset 2.2 Heating Operation Enabled 3 2.3 Demand Type Thermostat & Outd. Curve 3 3 2.4 Absolute Max CH Setpoint 188°F [87°C] 68°F [20°C] 188°F [87°C] 2.5 CH1 Maximum Setpoint 180°F [82°C] 68°F [20°C] 188°F [87°C] 3 3 2.6 CH1 Minimum Setpoint 80°F {27°C] 60°F [15°C] 188°F [87°C] 3 3 2.7 Outdoor Curve Coldest Day 10°F [-12°C] -30°F [-34°C] 50°F [10°C] 3 2.8 Outdoor Curve Warmest Day 64°F [18°C] 60°F [15°C] 78°F [25°C] 3 2.9 CH2 Circuit Enabled 3 2.10 CH2 Maximum Setpoint 140°F [60°C] 68°F [20°C] 194°F [90°C] 3 3 2.11 CH2 Minimum Setpoint 80°F [27°C] 60°F [15°C] 190°F [88°C] 3 3 2.12 Warm Weather Shutdown OFF OFF 78°F [25°C] 3 3 2.13 Circulation Pump Permanent Disabled 3 2.14 CH Post Pump Time 5 Minute OFF 20 minutes 3 2.15 Freeze Protection Enabled 3 2.16 Frost Protection Setpoint -22°F [-30°C] -22°F [-30°C] 50°F [10°C] 3 2.17 Parallel Shift Value 0°F [0°C] 0°F [0°C] 144°F [80°C] 3 2.18 CH Call Blocking 2 Minute 0 minute 30 minutes 3 3.2 DHW Operation Enabled 3 3.3 Demand Type Thermostat (Solo) Sensor (Excellence) 3.4 Boiler DHW Setpoint 168°F [76°C] 96°F [35°C] 188°F [87°C] 3 3 3.5 DHW Setpoint 140°F [60°C] 68°F [20°C] 176°F [80°C] 3 3 3.6 DHW On Differential 6°F [3°C] 4°F [-15°C] 18°F [-8°C] 3 3.7 DHW Storage Adder 28°F [15°C] 10°F [0°C] 54°F [30°C] 3 3.8 DHW Post Pump Time 2 Minute OFF 120 minutes 3 3.9 DHW Priority Timeout Off OFF 120 minutes 3 3 3.10 DHW Priority Enabled 3 3.11 DHW Call Blocking 0 Minute 0 minute 30 minutes 3 3.12 DHW to CH Call Blocking 1 Minute 0 minute 30 minutes 3 3.13 Antilegionella Function Disabled 3* 7.5.2 Stage Delay 60 Seconds 0 second 255 seconds 3 7.5.3 Minimum Firing Rate 25% 0% 100% 3 7.5.6 Maximum Firing Rate 852 MBH [250kW] 0 MBH [0kW] 869 MBH [255kW] 3 7.5.7 CH/DHW Boilers 0 0 6 3 7.5.8 Automatic Rotation Enabled 3 7.5.9 CH Proportional Gain 7 0 255 3 7.5.10 CH Integral Gain 245 0 255 3 7.5.11 DHW Proportional Gain 7 0 255 3 7.5.12 DHW Integral Gain 245 0 255 3 4.2 Prestige Model Solo (2 pumps) 3** Solo/Excel. (3 way valve) 4.3 Lockout Temp. 210°F [99°C] 3 4.4 Modbus Address 0=BCST 0 247 3 4.5 Pump Settings Solo/Excellence 2 3 4.6 Ignition Level NAT * Installer Reset will reset value to Enabled. ** Installer Reset will reset value to Solo (2 pumps). 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 37

The ACVMax Boiler Management System includes a Cascade function which allows multiple Prestige boilers to operate together without the need for an external controller. One Prestige will be selected as the Master and will be wired to accept all the low voltage control signals. The other Prestige boilers will be designated as Slaves and will only have a communication cable connecting them to the other boilers in the Cascade System. • The Cascade function allows up to six identical Prestige boilers to operate together in a single heating system. • Parallel Modulation fires as many boilers as possible to maximize system efficiency. • Lead Stage Automatic Rotation rotates the lead boiler to ensure even wear on each boiler in the Cascade System. This function can be disabled by the Automatic Rotation Setting. The Cascade Menu is divided into three sections 1. Cascade Information – Provides real time operating information of the Cascade System. See page 50. 2. Cascade Settings – Allows the installer to adjust the Cascade System settings for the appli- cation. See pages 51 through 56. 3. Cascade Autodetection – Automatically finds and configures each boiler of the Cascade System. See page 42. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 38

Cascade Autodetection Cascade Settings Menu Cascade Menu Installer Menu Cascade Cascade Cascade Information Cascade Settings Cascade Autodetection Cascade Role System Temp. Active Boilers Total Boilers Cascade Firing Rate Master 86ºF 0 2 -- Stage Delay Minimum Firing Rate Max. Firing Rate CH/DHW Boilers Auto Rotation CH Prop. Gain 60 sec 25% 398 MBH 0 Enabled 7 Press OK button to begin Cascade Autodetection, any other button to cancel 7.2 ACVMax Cascade Menu Structure 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 39

7.3.1 System Piping Standard Cascade installations will utilize a balanced manifold system as the primary / secondary connection to the system piping as shown in Figure 21 on page 44 or a reverse return piping arrangement as shown in Figure 23 on page 46. Split Cascade installations will utilize a balanced manifold system as the primary / secondary connection to the central heat- ing loop. Each boiler configured to respond to a domestic hot water call will also have a direct connection to the indirect water heater as shown in Figure 25 on page 48. Reference the Prestige Installation and Maintenance Manual for general boiler installation and piping require- ments. 7.3.2 System Sensor Installation Cascade operation requires a System Temperature Sensor to be installed on the common supply header downstream of all boilers in the system. Place the System Temperature Sensor within 10’ of the last boiler in the Cascade System for an accurate temperature reading. Proper placement and installation of the System Temperature Sensor is critical for reliable cascade operation. The type of System Temperature Sensor chosen also greatly affects the accuracy of the system temperature readings. Three types of System Temperature Sensor are available: • Direct Immersion - A direct immersion temperature sensor (MDRKIT05) is the recommended type since it will provide the most accurate water temperature readings. Install the 1/2” NPT direct immersion temperature sensor in a tee on the common sup- ply header downstream of all boilers in the system. Ensure that the temperature sensor probe is directly in the water flow but not touch- ing the opposite side of the tee. Wire the sensor to terminals 3 & 4 of X5 on the control module of the Master boiler. • Dry Well Installation – A temperature sensor (PSRKIT22) installed in a dry well will measure up to 10°F [5°C] lower than the actual water temperature. All water setpoints must be lowered at the Master boiler by 10°F [5°C] from the desired setpoints for reliable Cascade operation. Install a 3/8”ID drywell in the common supply header downstream of all boilers in the system. The drywell should be long enough to be directly in the water flow for the most accu- rate temperature reading. Insert the temperature sensor into the well and wire to terminals 3 & 4 of X5 on the control module of the Master boiler. • Pipe Mounted Installation – A temperature sensor (PTSENS12) mounted to the outside of the pipe will measure up to 20°F [11°C] lower than the actual water temperature. All water setpoints must be lowered at the Master boiler by 20°F [11°C] from the desired set- points for reliable Cascade operation. The Pipe Mounted tempera- ture sensor can be directly strapped to the outside of a 1” to 3” metallic pipe. Install the temperature sensor as follows: Fig. 19: System Sensor Direct Immersion Fig. 20: System Sensor Dry Well Installation 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 40

2. Cut a small slit in the gasket seal on the end of the sensor. 3. Route 18 AWG 2-wire cable or similar cable through the seal gas- ket into the enclosure. 4. Push down on the orange wire terminal retainers to insert the wires into the sensor terminals. Release the orange wire terminal retainers and confirm that the wires are firmly attached to the sen- sor terminals. 5. Select a location for the sensor on the common supply header downstream of all boilers in the system. Clean the pipe with fine sandpaper or emery cloth to ensure the pipe is clean and sensor will make good contact with the pipe. 6. Press the white cover onto the sensor and strap the sensor to the pipe using the included wire tie. 7. Wire the sensor to terminals 3 & 4 of X5 on the control module of the Master boiler. 7.3.3 Cascade Communication Cable • A communication cable PACAB01 must be installed between each boiler in the Cascade System. The cable has a 4 pin molex connec- tor on one end and a 6 pin molex connector on the other end. The 4 pin molex connector plugs into the Cascade Master X16 connector on the control module of the Master boiler or prior Slave boiler in cascades of three or more boilers. The 6 pin molex connector plugs into the Cascade Slave connector of the Slave boiler. Reference Figures 22, 24 and 26 on pages 45, 47 and 49 for wiring details. 7.3.4 Low Voltage Wiring Connections • Thermostat Wiring – CH1 and CH2 calls must be wired into the Cascade Master. • Outdoor Sensor Wiring – The outdoor temperature sensor must be wired into the Cascade Master. • Domestic Hot Water Wiring – A DHW call must be wired into the Cascade Master. • Additional Boiler Limits – Boiler Limits must be wired into each boiler in the Cascade System. When a boiler limit opens, that par- ticular boiler will lockout and will be removed from Cascade System operation. The other boilers in the Cascade System will continue to operate if they are not in a lockout. • External Modulation Control – An External Modulation Signal must be wired into the Cascade Master. The modulation signal will control the firing rate of the entire Cascade System, not just the Cascade Master. • Modbus Wiring – A building management system (BMS) connection must be wired into the Cascade Master to obtain cascade system and Master boiler information. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 41

• Circulator Wiring - Reference Figures 22, 24 and 26 on pages 45, 47 and 49 for circulator wiring required for each type of Cascade System. The circulator connections used will depend on the systems piping layout. All circulators are powered from a common 5A fuse located on the con- trol module. The total combined amp draw of the all circulators must not exceed 5 amps at any time. Use an isolation relay to lower the total combined amp draw if exceeding this limits. • Power Supply – A dedicated 120 VAC / 15A minimum service must be used to power the boilers in the Cascade System. Multiple boil- ers in the Cascade System can be placed on the same electrical cir- cuit. Each boiler can draw a maximum of 8 amps. • Alarm Wiring – The alarm contact closes whenever that particular Prestige is in a condition set by the Error Relay Setting. The alarm contact will also close on the Master boiler when any of the Slave boilers are locked in a condition set by the Error Relay setting. 7.3.6 Cascade Autodetection 7.3.6.1 Navigation: Home Screen>Installer Menu>Cascade>Cascade Autodetection The Cascade System must be configured after wiring is completed and any required adjustments are made in Cascade Settings. The Cascade Autodetection function automatically finds and configures all boilers in the Cascade System. This eliminates the need to manually configure each boiler of the Cascade System. Select Cascade Autodetection on the Master boiler then follow the onscreen instructions to perform Cascade Autodetection. Once Cascade Autodetection is finished, a message will be displayed indicating how many boilers have been found. If the number of boilers found is correct, press OK to finish Cascade Autodetection. If the number of boilers found is not correct, check the cascade communication cables between the boilers and repeat Cascade Autodetection. NOTICE Cascade Autodetect. Press OK button to begin Cascade Autodetection, any other button to cancel 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 42

to failed ignition Boiler #2 Slave Boiler #1 Master The Master boiler indicates that boiler #3 is locked out because of failed ignition. Failed Ignition The burner failed to light after 5 ignition attempts. Check gas supply to boiler. If problem persists after two reset attempts, call service. Press OK to reset. [3] E1 Boiler #3 Slave Failed Ignition The burner failed to light after 5 ignition attempts. Check gas supply to boiler. If problem persists after two reset attempts, call service. Press OK to reset. E1 Slave Operation -- 7.3.7 Lockouts If a lockout occurs to a boiler in a Cascade System, it will be removed from Cascade System operation. The remainder of the Cascade System contin- ues to operate and the next available boiler will fire if necessary. The Lockout Screen will be displayed on the locked out boiler as well as the Master boiler. The Master boiler Lockout Screen will also indicate which boiler in the Cascade System is locked out. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 43

Note: Reference Fig. 22, page 45 for cascade wiring. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 44

Master Prestige Boiler Slave Prestige Boiler CH Slave Prestige Boiler L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus CH L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus CH L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus Main Control Board Back of Display Panel Back of Display Panel ZV-2 End Switch ZV-1 End Switch Outdoor Sensor DHW Sensor System Sensor Cascade Master Cascade Master Cascade Slave Cascade Slave Main Control Board Fig. 21: Primary Secondary Cascade Wiring Note: Reference Fig. 21, page 44 for cascade piping. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 45

Note: Reference Fig. 24, page 47 for cascade wiring. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 46

Master Prestige Boiler Slave Prestige Boiler Slave Prestige Boiler L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus CH L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus Main Control Board Back of Display Panel Back of Display Panel Heating Call From Zone Panel Outdoor Sensor DHW Sensor System Sensor Cascade Master Cascade Master Cascade Slave Cascade Slave Main Control Board Fig. 24: Reverse Return Cascade Wiring Note: Reference Fig. 23, page 46 for cascade piping. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 47

Note 1: Reference Fig. 26, page 49 for cascade wiring. Note 2: DHW Priority must be set to Enabled in DHW Settings of the Cascade Master for proper operation. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 48

Master Prestige Boiler Slave Prestige Boiler CH Slave Prestige Boiler L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus CH L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus CH L G N L G N L G N L G N L G N L G N L G N FLAME PUMP 4 PUMP 3 DHW PUMP CH PUMP POWER SUPPLY ALARM CH2 Thermostat System Sensor Modulation Signal CH2 Thermosta t CH1 Thermostat Outdoor Sensor DHW Sensor or Aquastat Modbus Main Control Board Back of Display Panel Back of Display Panel Heating Call From Zone Panel Outdoor Sensor DHW Sensor System Sensor Main Control Board Cascade Master Cascade Master Cascade Slave Cascade Slave Fig. 26: Split Cascade Wiring Note: Reference Fig. 25, page 48 for cascade piping. 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 49

Cascade Information provides real time operating information of the Cascade System. Each line contains an information item followed by its current value. See below for a list of all Cascade Information items. 7.4.2 System Temperature Logging System Temperature has a logging function which records one sample every 12 minutes to produce a graph of the last 24 hours. Select System Temperature in Cascade Information then press the OK button to view the graph. 7.4 Cascade Information Cascade Information Cascade Role System Temp. Active Boilers Total Boilers Cascade Firing Rate Master 86ºF 0 2 -- Cascade Role Master 194 68 -24.00 -16.00 -8.00 0.00 System Temp. Information Item Description Cascade Role Displays the current role of the Prestige in the Cascade System. Cascade Role will be one of the following: • Master – Indicates this Prestige is the Master boiler in the Cascade System. • Slave – Indicates this Prestige is a Slave boiler in the Cascade System. • Standalone – Indicates this Prestige is not part of a Cascade System. System Temperature Displays the current system temperature reading wired to the Master boiler. If the system sensor is not wired in to the Master boiler,”--” is displayed. Active Boilers Displays the current number of boilers fired in the Cascade System. Total Boilers Displays the total number of boilers in the Cascade System. Cascade Firing Rate Displays the current firing rate of the entire Cascade System. Cascade Information Items 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 50

The Cascade Settings menu contains settings related to cascade operation. Each line contains a Cascade Setting followed by its current value. Six Cascade Settings are displayed on the screen at one time. Press the UP or DOWN buttons to scroll through additional Cascade Settings. Cascade Setting changes must be made only on the Cascade Master. Cascade Autodetection must be performed after making any changes to a Cascade Setting before the change will take effect. 7.5.2 Stage Delay Default: 60 Seconds Stage Delay sets the time delay before enabling or disabling a boiler in the Cascade System. The Stage Delay begins once the Master boiler determines that a boiler must be enabled to reach the setpoint or when the Master boiler deter- mines a boiler should be disabled because of a decreasing load. Press the LEFT or RIGHT buttons to adjust the Stage Delay then press the OK button to store the setting. Adjusting the Stage Delay will have the following effects: • Increase Stage Delay - Reaching the setpoint could take longer due to a longer delay between enabling boilers. - Overshooting the setpoint could occur due to boilers staying on longer before being disabled. • Decrease Stage Delay - Overshooting the setpoint could occur due to boilers being enabled quicker. - Boilers will be disabled quicker, possibly increasing boiler cycling and decreasing runtimes. 7.5.3 Minimum Firing Rate Default: 25% Minimum Firing Rate is the minimum firing rate of a single boiler in the Cascade System. The Master boiler uses this setting to determine when boilers can be enabled and disabled. Setting the Minimum Firing Rate below the recommend- ed minimum will result in boilers being enabled too quickly which may cause sharp increases in temperature from the Cascade System. Setting the Minimum Firing Rate above the recommended minimum will delay the enabling of boilers which may lower the system efficiency. Press the LEFT or RIGHT buttons to adjust the Minimum Firing Rate then press the OKbutton to store the setting. For the minimum and maximum recommended settings refer to Table 6 on page 52. NOTICE 7.5 Cascade Settings Cascade Setting Stage Delay Minimum Firing Rate Max. Firing Rate CH/DHW Boilers Auto Rotation CH Prop. Gain 60 sec 25% 398 MBH 0 Enabled 7 0% 100% 25% Minimum Firing Rate 0sec. 255sec. 60Sec. Stage Delay 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 51

The Master boiler uses the following algorithm to determine when the next boiler can be enabled: Once the currently fired boilers reach the calculated firing rate, the next boiler can be enabled without affecting the overall cascade firing rate. For example, the calculation for a Cascade System consisting of two PRES- TIGE Solo 399s would be: Once the first PRESTIGE Solo 399 firing rate reaches 50%, the second PRESTIGE Solo 399 can be enabled. Both will then fire at the minimum 25% firing rate so that the overall output from the Cascade System remains the same. 7.5.5 Boiler Disabling Algorithm Once the firing rate of all currently fired boilers decreases to the Minimum Firing Rate, a boiler can be disabled. The boilers which continue to fire will increase their firing rate if required to replace the output of the dis- abled boiler. Stable cascade operation requires that all boilers in a Cascade System be the same size. Mixing boiler sizes in a Cascade System could lead to temperature fluctuations and erratic cascade operation. 7.5.6 Maximum Firing Rate Default: 398 MBH Maximum Firing Rate is the maximum firing rate of a single boiler in the Cascade System. Press the LEFT or RIGHT buttons to adjust the Maximum Firing Rate then press the OK button to store the setting. The recommended settings are: NOTICE 0MBH 869MBH 398 MBH Maximum Firing Rate Number of Boilers Firing +1 Number of Boilers Firing x Minimum Firing Rate = Individual Boiler Firing Rate 1 + 1 1 x 25% = 50% Table 6: Min/Max Firing Rate Prestige Model Minimum Firing Rate Maximum Firing Rate Solo 80 20% 80 MBH Solo/Excellence 110 19% 110 MBH Solo 155 19% 153 MBH Solo 175 19% 170 MBH Solo 250 19% 240 MBH Solo 299 25% 299 MBH Solo 399 19% 399 MBH 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 52

Cascade System will respond to a domestic hot water call. The CH/DHW Boilers always begins with the Master boiler. The remaining boilers of the Cascade System will only respond to central heating calls. This allows the Cascade System to satisfy both central heating and domestic hot water calls at the same time. At the completion of a domestic hot water call, the CH/DHW Boilers will again be available to respond to central heating calls. Press the LEFT or RIGHT buttons to adjust the CH/DHW Boilers setting then press the OK button to store the setting. Splitting the Cascade System into CH only and CH/DHW boilers requires the boilers to be piped as shown in Figure 25 on page 48. The CH/DHW boilers must be piped to both CH and DHW loads directly for proper operation. DHW Priority must be set to Enabled in DHW Settings of the Cascade Master for proper operation. All CH/DHW Boilers will respond to a domestic hot water call. It is important that the domestic load is capable of transferring all of the heat generated to prevent excessive boiler cycling. 7.5.8 Automatic Rotation Default: Enabled Automatic Rotation allows the lead stage automatic rotation function to be disabled. Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting. • Enabled – The lead boiler automatically rotates every time a call for heat is received when a Switch option is chosen in CH Demand or every 24 hours when a Constant option is chosen in CH Demand. • Disabled – The lead boiler is always the Master boiler followed by each Slave boiler. NOTICE NOTICE NOTICE Automatic Rotation Enabled Disabled 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 53

Default: 7 CH Proportional Gain allows the cascade response to be adjusted for a cen- tral heating call. CH Proportional Gain has the greatest influence when the system temperature is far away from the setpoint. Press the LEFT or RIGHT buttons to adjust the CH Proportional Gain then press the OK button to store the setting. • Increase CH Proportional Gain - The Cascade System will reach setpoint faster, but overshooting the setpoint may occur. - To reach the setpoint faster, increase the CH Proportional Gain value by 2. Perform Cascade Autodetection and initiate a central heating call. Observe the cascade response and make further adjustments if necessary. • Decrease CH Proportional Gain - The Cascade System will take longer to reach the setpoint, but setpoint overshooting is minimized. - If the setpoint is reached too quickly, decrease the CH Proportional Gain value by 2. Perform Cascade Autodetection and initiate a central heating call. Observe the cascade response and make further adjustments if necessary. Only make adjustments to this setting after consulting ACV-Triangle Tube Technical Support. Improper adjustment of CH Proportional Gain could lead to temperature fluctuations and erratic cascade operation. 7.5.10 CH Integral Gain Default: 245 CH Integral Gain allows the cascade response to be adjusted for a central heating call. CH Integral Gain has the greatest influence when the system temperature is close to the setpoint. Press the LEFT or RIGHT buttons to adjust the CH Integral Gain then press the OK button to store the setting. • Increase CH Integral Gain - The Cascade System will take longer to reach the setpoint, but setpoint overshooting is minimized. - If the setpoint is reached too quickly, increase the CH Integral Gain value by 2. Perform Cascade Autodetection and initiate a central heating call. Observe the cascade response and make fur- ther adjustments if necessary. • Decrease CH Integral Gain - The Cascade System will reach setpoint faster, but overshooting the setpoint may occur. NOTICE 1 255 245 CH Integral Gain 1 255 7 CH Proportional Gain 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 54

value by 2. Perform Cascade Autodetection and initiate a cen- tral heating call. Observe the cascade response and make fur- ther adjustments if necessary. Only make adjustments to this setting after consulting ACV- Triangle Tube Technical Support. Improper adjustment of CH Integral Gain could lead to temperature fluctuations and erratic cascade operation. 7.5.11 DHW Proportional Gain Default: 7 DHW Proportional Gain allows the cascade response to be adjusted for a domestic hot water call. DHW Proportional Gain has the greatest influ- ence when the system temperature is far away from the setpoint. Press the LEFT or RIGHT buttons to adjust the DHW Proportional Gain then press the OK button to store the setting. • Increase DHW Proportional Gain - The Cascade System will reach setpoint faster, but overshooting the setpoint may occur. - To reach the setpoint faster, increase the DHW Proportional Gain value by 2. Perform Cascade Autodetection and initiate a domestic hot water call. Observe the cascade response and make further adjustments if necessary. • Decrease DHW Proportional Gain - The Cascade System will take longer to reach the setpoint, but setpoint overshooting is minimized. - If the setpoint is reached too quickly, decrease the DHW Proportional Gain value by 2. Perform Cascade Autodetection and initiate a domestic hot water call. Observe the cascade response and make further adjustments if necessary. Only make adjustments to this setting after consulting ACV- Triangle Tube Technical Support. Improper adjustment of DHW Proportional Gain could lead to temperature fluctuations and erratic cascade operation. NOTICE NOTICE 1 255 7 DHW Proportional Gain 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:37 AM Page 55

Default: 245 DHW Integral Gain allows the cascade response to be adjusted for a domestic hot water call. DHW Integral Gain has the greatest influence when the system temperature is close to the setpoint. Press the LEFT or RIGHT buttons to adjust the DHW Integral Gain then press the OK but- ton to store the setting. • Increase DHW Integral Gain - The Cascade System will take longer to reach the setpoint, but setpoint overshooting is minimized. - If the setpoint is reached too quickly, increase the DHW Integral Gain value by 2. Perform Cascade Autodetection and initiate a domestic hot water call. Observe the cascade response and make further adjustments if necessary. • Decrease DHW Integral Gain - The Cascade System will reach setpoint faster, but overshooting the setpoint may occur. - To reach the setpoint faster, decrease the DHW Integral Gain value by 2. Perform Cascade Autodetection and initiate a domes- tic hot water call. Observe the cascade response and make fur- ther adjustments if necessary. Only make adjustments to this setting after consulting ACV- Triangle Tube Technical Support. Improper adjustment of DHW Integral Gain could lead to temperature fluctuations and erratic cascade operation. NOTICE 1 255 245 DHW Integral Gain 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:38 AM Page 56

A BMS can read information from the boiler to determine its operating state, lockout status, sensor read- ings, etc. A BMS can also operate the boiler by providing a setpoint. Table 7: Modbus Configuration Protocol MODBUS RTU Baud Rate 38400bps Data Length 8 Parity None Stop Bits 1 Physical Layer RS485 (2 wire) Table 8: Supported Commands DEC HEX Description 03 0x03 Read Holding Registers 04 0x04 Read Input Registers 06 0x06 Write Single Register 16 0x10 Write Multiple Registers 17 0x11 Report Slave ID Table 9: Holding Registers (Read/Write) Address DEC (HEX) Supported Commands Description Byte: Format Notes 512 (0x0200) 0x03 0x06 0x10 CH Demand MB:U8 LB:U8 Writing 0= Modbus CH1 Demand has prior- ity over a DHW call 255 = DHW call has priority over a Modbus CH1 Demand Reading 0 = No CH Calls Present 255 = CH1 or CH2 Call Present Writing 0 = End CH1 Demand 255= Begin CH1 Demand A CH1 Demand lasts for 30 seconds from the last successful write. 513 (0x201) 0x03 0x06 0x10 Maximum Firing Rate LB:U8 Value = Maximum Firing Rate % This register becomes active when 255 is written to register 512 (0x0200) 514 (0x202) 0x03 0x06 0x10 CH Setpoint LB:U8 Value = CH Setpoint °C This register becomes active when 255 is written to register 512 (0x0200) 1280 (0x0500) 0x03 CH1 Maximum Setpoint LB:U8 Value = °C 1281 (0x0501) 0x03 DHW Storage Setpoint LB:U8 Value = °C 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:38 AM Page 57

Address DEC (HEX) Supported Commands Description Byte: Format Notes 0 (0x0000) 0x04 Boiler Status LB: Flag8 Bit: Description 0: PC Manual Mode 1: DHW Mode 2: CH Mode 3: Freeze Protection Mode 4: Flame Present 5: CH(1) Pump 6: DHW Pump 7: System / CH2 Pump 0 = Off, 1 = On 1 (0x0001) 0x04 Lockout Status MB: Flag8 LB:U8 Bit: Description 1: Lockout Code Type 0 = Automatic Reset Lockout 1 = Manual Reset Lockout Value = Lockout Code 2 (0x0002) 0x04 Lockout Status LB:U8 0 = Single / Master Boiler 1 = Slave 1 2 = Slave 2 3 = Slave 3 4 = Slave 4 5 = Slave 5 F = Single / Master Display 768 (0x0300) 0x04 Boiler Supply Temperature / System Temperature S16 Value = 0.1°C Invalid Value = 32768 (0x8000) Value is the Boiler Supply Temperature unless the System Temperature Sensor is installed 769 (0x0301) 0x04 Boiler Return Temperature LB:S8 Value = °C Invalid Value = 65472 (0xFFC0) 770 (0x0302) 0x04 DHW Storage Temperature LB:S8 Value = °C Invalid Value = 32768 (0x8000) 771 (0x0303) 0x04 Boiler Flue Temperature LB:S8 Value = °C Invalid Value = 65472 (0xFFC0) 772 (0x0304) 0x04 Outdoor Temperature LB:S8 Value = °C Invalid Value = 32768 (0x8000) 773 (0x0305) 0x04 Future Use LB:U8 774 (0x0306) 0x04 Flame Ionization Current LB:U8 Value = Flame Current µA 775 (0x0307) 0x04 Boiler / Cascade Firing Rate LB:U8 Value = Firing Rate % 776 (0x0308) 0x04 Boiler Setpoint LB:U8 Value = °C Invalid Value = 32768 (0x8000) 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:38 AM Page 58

The Manual Operation Screen allows the burner and circulators to be man- ually enabled for testing. 9.2 Fan Press the OK button while the FAN icon is highlighted to manually fire the burner and power the CH (1) circulator. Press the LEFT and RIGHT buttons to adjust the firing rate from 1 % (Low Fire) to 100% (High Fire). Hold down the LEFT or RIGHT buttons to rapidly increase or decrease the firing rate. Press the OK button again while the FAN icon is highlighted to shutdown the burner when finished. An adequate CH load must be present to dissipate the heat generated while the burner is manually fired. If an adequate CH load is not avail- able, an indirect water heater can be used to dissipate the heat by creat- ing a domestic hot water call which will enable the DHW circulator. 9.3 CH CH1 Press the OK button while the CH CH1 icon is highlighted to manually power the CH (1) circulator. Press the OK button again while the CH CH1 icon is highlighted to shutdown the CH (1) circulator. The Auxiliary Boiler circulator is also powered when the CH (1) cir- culator is manually enabled. 9.4 DHW Press the OK button while the DHW icon is highlighted to manually power the DHW circulator. Press the OK button again while the DHW icon is highlighted to shutdown the DHW circulator. The Auxiliary Boiler circulator is also powered when the DHW circu- lator is manually enabled. 9.5 SYS CH2 Press the OK button while the SYS CH2 icon is highlighted to manually power the System circulator. Press the OK button again while the SYS CH2 icon is highlighted to shutdown the System circulator. NOTICE NOTICE NOTICE 9.0 MANUAL OPERATION Manual Operation Released Of Of Of CH1 FAN DHW CH2 Manual Operation Released Of Of Of CH1 FAN DHW CH2 Manual Operation Released Of Of Of DHW FAN CH1 CH2 Manual Operation Released Of Of Of CH2 FAN DHW CH1 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:38 AM Page 59

from ACV- Triangle Tube MAxI-FlO AND SPA HEAT ExCHANGERS SMART INDIRECT FIRED WATER HEATERS TTP BRAzED PlATE HEAT ExCHANGERS - Exclusive tank-in-tank design - Stainless steel construction - Available in 7 sizes - Limited LIFETIME residential warranty - 6 year Limited commercial warranty - Self cleaning/self descaling design - For domestic water, snow melting, radiant floor, refrigeration - Plates made of stainless steel, with a 99.9 % copper and brazed, ensuring a high resistance to corrosion - Self cleaning and self descaling - Computerized sizing available from ACV- Triangle Tube - Available in capacities from 25,000 BTU/hr to 5,000,000 BTU/hr - Construction of high quality corrosion resistant stainless steel (AISI 316) or titanium - Specially designed built-in flow restrictor to assure maxi- mum heat exchange - Compact and light weight - Available in 8 sizes that can accommodate any size pool or spa Triangle Tube - 1 Triangle Lane - Blackwood, NJ 08012 - Tel: (856) 228 8881 - Fax: (856) 228 3584 E-mail: [email protected] 2015-10 Prestige ACVMax Control Sup 12-14-15_ACVMax_Control 12/15/15 7:38 AM Page 60