Ariston microGENUS 23 MFFI Servicing Instructions

G.C.N: 47-116-14 47-116-15 LEAVE THESE INSTRUCTIONS WITH THE END-USER Country of destination: GB

1.2 TO GAIN GENERAL ACCESS - Removing the front panel - Removing the sealed chamber frontal cover - Removing the side panels 1.3 ACCESS TO THE COMBUSTION CHAMBER - Removing the combustion cover - Removing the burner and jets - Removing the electrodes - Removing the main heat exchanger - Removing the air pressure switch - Removing the fan - Removing the venturi device 1.4 SERVICING AND REMOVAL OF THE GAS VALVE - Setting the gas pressures - Removing the spark generator - Removing the gas valve 1.5 ACCESS TO THE WATER CIRCUIT - Removing the D.H.W. (secondary) exchanger - Removing the safety valve - Removing the automatic air vent - Removing the main circuit flow switch - Removing the pump - Removing the pressure gauge - Removing the expansion vessel - Removing the overheat thermostat - Removing the heating temperature sensor (N.T.C.) - Removing the D.H.W. temperature sensor (N.T.C.) - Removing the divertor valve actuator - Removing the D.H.W. flow switch 1.6 ACCESS TO THE CONTROL SYSTEM - Checking the fuses - Removing the time clock - Removing the P.C.B. 2. FAULT FINDING 2.1 FAULT FINDING GUIDE (FLOW-CHART) 3. ELECTRICAL DIAGRAMS 4. SHORT SPARE PARTS LIST TABLE OF CONTENTS

rotates on two lateral hinges; the panel stays in a semi- horizontal position, which allows access to the inner parts of the boiler (FIG. 1.2); 3. In order to increase the manouvering space, it is possible to raise the control panel and rotate it to a fully horizontal position (FIG. 1.3); 4. Remove the screws “B” from the front panel bottom lip (FIG. 1.4); 5. Lift the front panel from the raised screws at the the top of the casing (FIG. 1.5). FIG. 1.4 B FIG. 1.5 3 B063 1. SERVICING INSTRUCTIONS The life of individual components varies and they will need servicing or replacing as and when faults develop. The fault finding sequence chart in chapter 2 will help to locate which component is the cause of any malfunction, and instructions for removal, inspection and replacement of the individual parts are given in the following pages. 1.1 REPLACEMENT OF PARTS 1.2 TO GAIN GENERAL ACCESS All testing and maintenance operations on the boiler require the control panel to be lowered. This will also require the removal of the casing. Removing the front panel 1. Loosen the fastening screws “A” of the control panel located on the lower part of the panel itself. (FIG. 1.1); A FIG. 1.3 FIG. 1.1 FIG. 1.2 To ensure efficient safe operation, it is recommended that the boiler is serviced annually by a competent person. Before starting any servicing work, ensure both the gas and electrical supplies to the boiler are isolated and the boiler is cool. Before and after servicing, a combustion analysis should be made via the flue sampling point (please refer to the Installation Manual for further details). After servicing, preliminary electrical system checks must be carried out to ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and short circuit). 19.eps 14.eps 13.eps FO016A/15.eps 16.eps

1. Remove the screws “C” (FIG. 1.6); 2. Lift the sealed chamber frontal cover from the locating pins (FIG. 1.7). FIG. 1.6 C C FIG. 1.7 Removing the side panels 1. Remove the four screws “D” for each side panel (FIG.1.8); 2. Pull the panel away from the boiler, then lift the panel up and remove from the boiler (FIG.1.9). D D D FIG. 1.8 FIG. 1.9 18.eps 98.tif 17 eps 97.tif

Before carrying out this procedure, unscrew and slide the burner forward (see previous section). 1. Remove rubber gasket “G” (Fig. 1.13); 2. To remove the detection electrode disconnect the cable at its connection point close to the P.C.B. (Fig. 1.14); FIG. 1.13 G FIG. 1.14 Removing the burner and jets 1. Remove the screws “F” from the burner (FIG. 1.11); 2. Remove the burner (FIG. 1.12); 3. Remove the jets using a No. 7 socket spanner; 4. Replace in reverse order. 5 B063 Removing the combustion cover 1. Remove the screws “E” (FIG. 1.10); 2. Lift off the combustion cover. 1.3 ACCESS TO THE COMBUSTION CHAMBER E E E FIG. 1.10 FIG. 1.11 Fig. 1.12 F F 99.tif 12 eps 78 eps 49 eps 50 eps

4. Gently slide the electrode downward (FIG. 1.16). To replace, repeat the steps in reverse order, paying particular attention to the following: a -Centre the electrode in the positioning hole carefully, otherwise the electrode may break; b -Check that the cables have been connected correctly; c -Check that the rubber gasket covers the cable/ electrode connection point completely. FIG. 1.15 FIG. 1.16 H 1. Drain the boiler of water; 2. Release the overheat thermostat sensor “I” (FIG. 1.17); 3. Release the two connection nuts “J” connecting the exchanger to the flow and return pipes (FIG. 1.18); 4. Pull it straight out (FIG. 1.19). Removing the main heat exchanger FIG. 1.18 J Fig. 1.17 I FIG. 1.19 51 eps 11 eps 52 eps 75 eps 76 eps 6 eps

“O” (FIG.1.23); 2. Remove screw “P” and remove the fan collar clamp “Q” (FIG.1.24); 3. Remove screws “R” (FIG.1.25); 4. Remove fan and mounting plate (FIG.1.26). Removing the fan 1. Disconnect the electrical connections “K” and silicon pipes “L” from their connection points (FIG. 1.20); 2. Remove screws “M” on the top of the sealed chamber (FIG. 1.21); 3. Unscrew to remove switch from the plate (FIG. 1.22). FIG. 1.21 FIG. 1.20 7 B063 Removing the air pressure switch L K M M FIG. 1.22 FIG. 1.25 R R FIG. 1.24 P Q FIG. 1.23 N N O FIG. 1.26 91.tif 90.tif 93.tif 94.tif 95.tif 96.tif

OF THE GAS VALVE Setting the gas pressures 1 2 Recommended pressure for soft-light ignition 8 mbar NATURAL GAS (G20) BUTANE GAS (G30) PROPANE GAS (G31) 16 mbar 16 mbar 3 4 A B C E F D Setting the minimum and the maximum power of the boiler 1. Check that the supply pressure to the gas valve is a minimum of 20 mbar for natural gas. 2. To do this, remove the screw “A”. Fit the pipe of the pressure gauge to the pressure connection of the gas valve “B”. When you have completed this operation, replace the screw “A” securely into its housing to seal off the gas. 3. To check the pressure supplied by the gas valve to the burner, remove the screw “C”. Fit the pipe of the pressure gauge to the pressure outlet of the gas valve “D”. Disconnect the compensation pipe either from the gas valve or from the sealed chamber. 4. Set the On/Off button to position < I > and the “summer/winter” switch to the winter position. To set the maximum power, turn on the hot water tap and allow the hot water tap to run at a rate of about 8 litres/minute so that the main burner lights. Adjust nut “E” on the modureg to set the gas pressure (displayed on the pressure gauge) corresponding to the maximum power (see TABLE “A” page 9). 5. To set the minimum power, disconnect a supply terminal from the modureg and adjust screw “F”. Turn the screw clockwise to increase the pressure and coun- ter-clockwise to decrease the pressure (displayed on the pressure gauge) corresponding to the minimum power (see TABLE“A” page 9). 6. When you have completed the above operations, turn off the hot water tap, re-connect the supply terminal to the modureg on the gas valve and replace the cap on the screw of the modureg. Setting the maximum heating circuit power 7. To set the maximum heating circuit power, place the On/Off button to position < I > and the “summer/winter” switch to winter position. Turn the knob of the heating thermostat clockwise to maximum. 8. Remove the inspection panel of the P.C.B. and fit a small cross-head screwdriver in to the right hand potentiometer. Turn clockwise to increase the pressure or counter-clockwise to reduce the pressure. Adjust the setting to the required heating pressure value (displayed on the pressure gauge), as indicated in the diagrams shown in page 10. 9. Turn off the boiler by placing the main switch to the "Off" position. Setting pressure for soft ignition. Disconnect the detection electrode connection from the P.C.B.. Start the boiler and during the ignition sequence adjust the left hand potentiometer until the gas pressure reads the required gas pressure as per the table below. Once the gas pressure is set turn off the boiler and re-connect the connection to the P.C.B. NB.: It may be necessary to reset the flame failure reset a number of times during this operation. VG001Aa VG001Ac VG001Ab VG001Ad

natural gas (G20) model 23 model 27 Regulating the heating power for butane gas (G30) model 23 model 27 34 36 38 40 Regulating the heating power for propane gas (G31) 23 MFFI 2.70 20 11.0 2.0 1.16 2.01 Kg/h 0.87 Kg/h 27.7 mbar 6.0 mbar 28 mbar 12 x 0.77 2.00 Kg/h 0.85 Kg/h 35.5 mbar 7.3 mbar 37 mbar 12 x 0.77 27 MFFI 3.15 20 11.0 1.6 1.26 2.34 Kg/h 0.94 Kg/h 27.7 mbar 4.6 mbar 28 mbar 2.31 Kg/h 0.93 Kg/h 35.5 mbar 6.0 mbar 37 mbar 14 x 1.30 14 x 0.77 14 x 0.77 TABLE “A” CG007A CG008A CG009A TB012A

1. Disconnect ignition leads “T” by pulling upward (FIG. 1.27); 2. Remove the screw “V” (FIG. 1.28); 3. Remove the spark generator (FIG. 1.29). 10. Remove the pipe from the pressure gauge and connect screw “C” to the pressure outlet in order to seal off the gas. 11. Carefully check the pressure outlets for gas leaks (valve inlet and outlet). IMPORTANT! Whenever you disassemble and reassemble the gas connections, always check for leaks using a soap and water solution. FIG. 1.27 FIG. 1.28 FIG. 1.29 T V Soft-light Adjustment Max Heating Adjustment 61.eps 45.eps 43.eps 44.eps VR015A.eps

must be drained of all water. Removing the D.H.W. (secondary) exchanger 1.Remove the screws “Y” (FIG 1.33 + FIG 1.34); 2.Push the exchanger towards the rear of the boiler, and lift upwards and remove out of the front of the boiler (FIG 1.35); 3.Before replacing the exchanger ensure that the O-rings are in good condition and replace if necessary. 1.6 ACCESS TO THE WATER CIRCUIT FIG. 1.30 FIG. 1.31 FIG. 1.32 FIG. 1.33 W X X Removing the gas valve 1. Disconnect all the cables from the solenoid and modureg; 2. Remove the spark generator (see previous section); 3. Release the top nut “W” (FIG. 1.30); 4. Remove the screws “X” from the bottom of the gas valve pipe (FIG. 1.31); 5. Remove the gas valve (FIG. 1.32). Y FIG. 1.34 FIG. 1.35 Y 47.eps 48.eps 38.eps 22.eps 21.eps 68.eps

1. Loosen nut “Z” (FIG. 1.36); 2. Unscrew and remove the valve (FIG. 1.37). Removing the automatic air vent 1. Unscrew valve top “A1” (FIG. 1.38); 2. Remove valve (Fig 1.39). Removing the main circuit flow switch 1. Remove the cable of the main circuit flow switch “B1” (FIG. 1.40); 2. Remove the screws “C1” (FIG. 1.41); 3. Remove the main circuit flow switch. FIG. 1.36 Fig. 1.38 FIG. 1.40 Z B1 C1 C1 FIG. 1.37 A1 Fig. 1.39 FIG. 1.41 40.eps 37.eps 39.eps 41.eps 53.eps 54.eps

1. Remove the U-clip “ D1” (FIG. 1.41); 2. Remove the retaining clip “E1” (FIG. 1.42); 3. Remove the U-clip “ F1” (FIG. 1.43); 4. Release the nut “G1” (FIG. 1.44); 5. Remove the pipe “H1” (FIG. 1.45); 6. Remove the screws “I1” (FIG. 1.46); 7. Remove the pump (FIG. 1.47). D1 FIG. 1.41 FIG. 1.42 FIG. 1.43 FIG. 1.44 E1 F1 FIG. 1.45 FIG. 1.46 FIG. 1.47 G1 H1 I1 I1 31.eps 33.eps 34.eps 42.eps 32.eps 35.eps 25.eps

1. Loosen nuts “K1” and remove the gas pipe (FIG. 1.50); 2. Loosen nut “L1” (FIG. 1.51); 3. Remove back nut “M1” (FIG. 1.52); 4. Remove the expansion vessel (FIG. 1.53). Removing the pressure gauge 1. Remove the U-clip “J1” and remove the pressure gauge coupling (FIG. 1.48); 2. Push the pressure gauge through the control panel from the rear (FIG. 1.49). FIG. 1.48 FIG. 1.50 J1 FIG. 1.49 K1 L1 FIG. 1.51 FIG. 1.52 FIG. 1.53 K1 M1 34.eps 27.eps 77.eps 57.eps 58.eps 59.eps

1. Disconnect the overheat thermostat electrical connections “N1” (FIG. 1.54); 2. Then remove the thermostat from its mounting by releasing the securing clip (FIG. 1.55). Removing the heating temperature sensor (N.T.C.) 1. Pull off the electrical connector “P1” and unscrew the sensor probe using a suitable spanner (FIG. 1.56). FIG. 1.54 FIG. 1.55 Removing the D.H.W. temperature sensor (N.T.C.) 1. Pull off the electrical connector “Q1” and unscrew the sensor probe using a suitable spanner (FIG. 1.57). FIG. 1.57 Removing the divertor valve actuator 1. Unplug the electrical connector “R1” (FIG. 1.58); 2. Release the retaining clip “S1” and remove the divertor valve actuator. FIG. 1.58 Removing the D.H.W. flow switch 1. Unplug the electrical connector “T1” (FIG. 1.59); 2. Release the retaining clip “V1” and remove the D.H.W. flow switch. FIG. 1.59 N1 P1 Q1 S1 R1 FIG. 1.56 T1 V1 80.eps 83.eps 87.eps 60.eps 74.eps 30.eps

1. Remove the inspection cover on the reverse of the control panel (FIG. 1.60); 2. Remove the fuses (FIG. 1.61). 1.6 ACCESS TO THE CONTROL SYSTEM Removing the time clock 1. Unplug electrical connection “W1” from the clock (FIG. 1.62); 2. Remove the screws “W2” (see fig. 1.63); 3. Remove the clock from the panel (see fig. 1.64). FIG. 1.60 FIG. 1.62 FIG. 1.61 FIG. 1.64 W1 72.eps 61.eps 69.eps 1190.tif FIG. 1.63 1189.jpg W2

1. Isolate electricity; 2. Remove the inspection cover from the reverse of the control panel; 3. Unplug all electrical connections from the P.C.B. (FIG. 1.65); 4. Remove the screws “X1” (FIG. 1.66); 5. Separate the facia panel from the rear of the control panel (FIG. 1.67); 7. Remove the screws “Y1” and remove the P.C.B. (FIG. 1.68). FIG. 1.66 X1 X1 X1 X1 X1 X1 FIG. 1.65 FIG. 1.67 FIG. 1.68 Y1 Y1 64.eps 1187.eps 65.eps 82.eps

IS THE POWER L.E.D. ON? POSTION OF THE SELECTOR NO NO WINTER ESTAT E SUMMER NO NO YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES YES YES YES YES YES 1 - Check the fuses 2 - Check the power supply cable, plug and outlet 3 - Check/replace the power supply to the P.C.B. TURN ON THE ON/OFF SWITCH D.H.W. IS BEING DRAWN? D.H.W. IS BEING DRAWN? FOR BOILERS WITH ELECTRONIC ANTI-FROST DEVICE: PROTECTION IS ACTIVATED IF HEATING TEMP IS < 5°C FOR BOILERS WITH ELECTRONIC ANTI-FROST DEVICE: PROTECTION IS ACTIVATED IF HEATING TEMP IS < 5°C MUST TIME CLOCK AND/OR ROOM THERMOSTAT BE ACTIVATED? A ECONOMY/ COMFORT SELECTOR TEMP. C.H. < 34°C Comfort Comfort Economy Economy 1 - There is sufficient water in the system 2 - The gas is turned on 3 - The electrical supply is turned on 1 - Check/reset system pressure 2 - Check/restore gas supply 3 - Check/replace short- circuited heating probe 4 - Check/replace siezed pump 1 - Check/reset the system pressure 2 - Check/restore gas supply 3 - Check/replace short- circuited heating probe 4 - Check/replace siezed pump TEMP. C.H. < 34°C ECONOMY/ COMFORT SELECTOR It is possible to detect and correct any defect by using the standard fault finding diagrams described in this chapter. 2.1 FAULT FINDING GUIDE (FLOW-CHARTS) FC004Aa

RUNNING? YES NO NO NO YES YES YES POWER TO THE PUMP? DOES THE "NO WATER" L.E.D. ILLUMINATE (WITHIN 40 SECS)? 1 - Check if there is air in the system 2 - Check main circuit flow switch operation 3 - Check pressure on the water gauge and fill system to return to 1 bar 1 - Turn the boiler off then on (protection reset) 1 - Check that the pump is not stuck 2 - Release/replace pump 1 - Check pump cable 2 - Check/replace P.C.B. 3 - Check main flow main switch operation when drawing D.H.W. A B FC004Ab

RUNNING? BOILER SHUTDOWN? POWER TO FAN? NO YES YES YES NO YES NO NO NO YES 1 - Check/replace main circuit flow switch 2 - Check/replace connection cable 3 - Check/replace P.C.B. 1 - Check/replace air pressure switch 2 - Check if reset button is jammed 3 - Check/replace flame detection electrodes 1 - Check/replace connection cable 2 - Check/replace P.C.B. 3 - Check/replace air pressure switch 1 - Replace fan 1 - Reset the boiler PUMP PROTECTION ACTIVATED? INTERNAL P.C.B. PROTECTION ACTIVATED? B C FC004Ac

ALIGHT? YES NO YES YES YES NO NO NO NO YES 1 - Check/replace ignition electrode 2 - Check ignition cable 3 - Check spark generator 4 - Check ignition electrode cable 5 - Check/replace P.C.B. 1 - Check if flame strikes detection electrode 2 - Check soft-light gas pressure 3 - Check/replace detection electrode 4 - Check/replace P.C.B. 1 - Check power supply of gas valve 2 - Check/replace P.C.B. 3 - Check efficiency of gas valve 4 - Replace gas valve Shutdown L.E.D. off fan restarts IS THE AIR PRESSURE SWITCH ACTIVATED? CHECK ∆P ON TEST PRESSURE INTAKE IS FLUE DISCHARGE NORMAL? HAS THE BOILER SAFETY SHUTDOWN BEEN ACTIVATED? HAS THE BOILER SAFETY SHUTDOWN BEEN ACTIVATED? 1 - Check exhaust discharge 2 - Check venturi & pipes 3 - Check fan efficiency 1 - Check A.P. switch cable 2 - Check/replace A.P. switch 3 - Check/replace P.C.B. C D P 1.2 mbar P 1.2 mbar ∆ ∆ ∅ ≤ FC004Ad

burner switches off Drawing D.H.W: radiators heat up in summer mode Drawing D.H.W: insufficient hot water temperature Drawing D.H.W: noisy operation Decrease/increase heating circuit pressure Repeated shutdowns Repeated intervention of safety thermostat When cold water tap turned off, the boiler ignites Insufficient radiator temperature - air in secondary heat exchanger - faulty main circuit flow switch - faulty D.H.W. flow switch - faulty 3-way valve - check C.H./D.H.W. temperature probes - check gas pressures - check water flow rate - check secondary heat exchanger - primary heat exchanger faulty or lime-scale deposits - low heating system water pressure - check gas pressures - check C.H./D.H.W. temperature probes - check for leaks on the heating circuit - faulty filling-loop - faulty secondary heat exchanger - expansion vessel faulty - faulty detection electrodes - check gas settings - check flame detection electric circuit - C.H./D.H.W. temperature probes open circuit - overheat thermostat not calibrated correctly - air in primary water circuit - drop in pressure in the water mains, with consequent water hammer - check C.H. temperature probe - check by-pass - check gas pressures FC004Ae

B = Central Heating Selection (Winter) and Temperature Adjustment C = Connector for Total Check System D = Domestic Hot Water Temperature Adjustment E = Soft-light Adjustment F = Maximum Heating Adjustment G = On/Off Switch H = On/Off L.E.D. I = Fume Sensor L.E.D. J = Ignition Failure (Lockout) L.E.D. K = Low System Water Level/Lack of Circulation L.E.D. L = Reset Button M = Economy/Comfort Selector N = Overheat L.E.D. O = Temperature L.E.D.s P = Transformer Q = Circulation Pump Relay R = Fan Relay S = Gas Valve Relay T = Motorised Diverter Valve Relay V = Spark Generator U = Anti-cycling Device Adjustment for Heating A01 = Circulation Pump A02 = Fan A03 = Spark Generator/Gas Valve Supply A04 = Motorised Diverter Valve A05 = Flame Detection Circuit A06 = Detection Electrode A07 = Main Circuit Temperature Probe A08 = Domestic Hot Water Temperature Probe A09 = Domestic Hot Water Flow Switch A10 = Main Circuit Flow Switch A11 = Modulator A12 = Air Pressure Switch A13 = Safety Thermostat A14 = External (Room) Thermostat Colours: Gry = Grey Wh = White Pnk = Pink Brn = Brown Bl = Blue Blk = Black Rd/Blk = Red/Black

J K Blk Blk Gry Gry Pnk Pnk Pnk Gry Gry Wh Wh Wh Wh Wh Wh Wh Rd/Blk Rd/Blk Rd/Blk Blk Blk Blk Brn Brn Brn Brn Blk Blk SE017A U J K M L R S Q T O N SF014A

METHANE 2320005600001 A MICROGENUS 23 MFFI LPG 2320005600001 B MICROGENUS 27 MFFI METHANE 2320005600001 C MICROGENUS 27 MFFI LPG 2320005600001 D 999091 4. SHORT SPARE PARTS LIST microGENUS 23/27 MFFI

998616 573521 998077 573520 997147 997077 569236 998613 571547 998099 998940 998424 574279 998645 997089 998836 999091 999599 998947 999245 573989 571651 999397 998894 997206 998620 998893 998618 998669 998887 998939 571646 573295 573825 573172 998623 998622 998624 998941 997029 998490 998718 998975 998974 998644 998643 998738 998961 999207 571547 571772 571771 571770 998172 998716 998717 Key no. G.C. part no. ARISTON Part No. Description 2 5 12 14 16 17 18 19 20 21 24 25 26 27 28 33 AB 33 CD 38 41 43 52AB 52CD 66AB 66CD 72 74AB 74CD 75C 75D 76AB 76CD 75A 75B 77 79 98 99 100 311 321 331 332 333 334 351 352 353 354 AB 354 CD 371 372 373 374 375 381 382 379816 E61 468 164 282 E61 475 164 225 E25 427 E61 429 164 338 E61 478 E24 077 E61 479 E61 482 E61 483 E25 529 E61 848 E61 485 E61 490 E61 881 E61 519 E61 520 E61 530 E03 818 E61 967 E25 425 E61 546 E61 547 E61 549 E61 972 E61 974 E26 767 E26 657 E26 658 E26 378 E61 565 E61 567 E61 569 E25 582 E61 647 E61 648 E61 649 E61 650 E61 652 E61 654 E61 656 E61 660 E62 030 E24 077 E24 077 E24 076 E24 075 E61 663 E61 665 E61 667 Expansion vessel Gasket 3/8" O-ring Gasket 3/4" Motor (3- Way valve) Fixing clip (motor) Temperature probe (C.H.W.) Flow group Diaphragm (main flow switch) Main circuit flow switch Return group O-ring Gasket Spark generator Gas valve (SIT 845 SIGMA) Pump Pump Time clock P.C.B. (CMP1-FFI) Pressure gauge Air pressure switch Air pressure switch Fan Fan Thermostat (overheat) Main exchanger Main exchanger Burner 12 ramp (natural gas) Burner 12 ramp (LPG) Burner 14 ramp (natural gas) Burner 14 ramp (LPG) Secondary exchanger (p-type 23kW) Secondary exchanger (p-type 27kW) O-ring (secondary exchanger) Safety valve (1/2" 3 bar) Electrode (Ignition R.H.) Electrode (Ignition L.H.) Detection electrode D.H.W. actuator kit Operator coils (SIT SIGMA) Central heating by-pass kit Heating spring kit 3-way spring kit Actuator bush Gasket (auto air vent) Auto air vent Gasket (pump head) Pump head (Gold 15/5) Pump head Diaphragm (main flow switch) Magnet (main flow switch) Spring (main flow switch) Main flow switch top cap Main flow switch reed system Burner jet 1.25 full kit (Natural gas) Burner jet 0.72 full kit (LPG) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Stampa: Bieffe Recanati Manufacturer: Merloni TermoSanitari SpA - Italy Commercial subsidiary: MTS (GB) LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone: (01494) 755600 Fax: (01494) 459775 internet: http://www.mtsgb.ltd.uk E-mail: [email protected] Technical Service Hot Line: (01494) 539579