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Supplied By www.heating spares.co  Tel. 0161 620 6677

10

1.4.2  Removing the spark generator

1. Disconnect ignition leads “S” by pulling upward

(F

IG

. 1.27);

2. Remove the screw “T” (F

IG

. 1.28);

3. Remove the spark generator by pulling forward from the

gas valve (F

IG

. 1.29).

NB.: It may be necessary to reset the flame failure reset
a number of times during this operation.

10. Remove the pipe from the pressure gauge and connect

screw “C” to the pressure test point in order to seal off
the gas.

11. Carefully check the pressure test points 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.

F

IG

. 1.27

F

IG

. 1.28

F

IG

. 1.29

S

T

Soft-light

Adjustment

Max Heating

Adjustment

Содержание microCombi

Страница 1: ...Supplied By www heating spares co Tel 0161 620 6677 Servicing Instructions Type C Boilers G C N 47 116 16 LEAVE THESE INSTRUCTIONS WITH THE END USER Country of destination GB...

Страница 2: ...ALVE Setting the gas pressures Removing the spark generator Removing the gas valve 1 5 ACCESS TO THE WATER CIRCUIT Removing the pump pressure switch Removing the safety valve Removing the automatic ai...

Страница 3: ...ructions 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 t...

Страница 4: ...ws C FIG 1 6 2 Lift the sealed chamber front cover from the locating pins FIG 1 7 FIG 1 6 C C FIG 1 7 1 2 3 Removing the side panels 1 Remove the four screws D for each side panel FIG 1 8 2 Pull the p...

Страница 5: ...FIG 1 14 3 Remove screw H FIG 1 15 4 Gently slide the electrode downward FIG 1 16 FIG 1 13 G FIG 1 14 1 3 2 Removing the burner and jets 1 Remove the screws F from the burner FIG 1 11 2 Remove the bu...

Страница 6: ...facing each other to give the correct spark gap c Check that the cables have been connected correctly d Check that the rubber gasket covers the cable electrode connection point completely FIG 1 15 FIG...

Страница 7: ...ounting plate FIG 1 26 1 3 6 Removing the fan 1 Disconnect the electrical connections K and silicone pipes L from their connection points FIG 1 20 2 Remove screws M on the top of the sealed chamber FI...

Страница 8: ...pply 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...

Страница 9: ...s G20 model 23 Regulating the heating power for butane gas G30 model 23 34 36 38 40 Regulating the heating power for propane gas G31 23 MFFI 2 78 20 11 0 2 0 1 16 2 02 Kg h 0 87 Kg h 27 5 mbar 6 2 mba...

Страница 10: ...to reset the flame failure reset a number of times during this operation 10 Remove the pipe from the pressure gauge and connect screw C to the pressure test point in order to seal off the gas 11 Care...

Страница 11: ...by using a spanner on the nut 3 Remove the pump pressure switch 1 5 ACCESS TO THE WATER CIRCUIT FIG 1 30 FIG 1 31 FIG 1 32 FIG 1 33 U V V 1 4 3 Removing the gas valve Important Before removing the gas...

Страница 12: ...ing the automatic air vent 1 Unscrew valve top Y FIG 1 35 2 Remove valve complete with float FIG 1 36 FIG 1 35 Y FIG 1 36 1 5 2 Removing the safety valve 1 Disconnect the discharge pipe work from belo...

Страница 13: ...emoving the pump 1 Remove the U clip Z FIG 1 37 2 Remove the retaining clips A1 FIG 1 38 3 Release the nut C1 FIG 1 39 4 Remove the pipe D1 FIG 1 40 5 Remove the screws E1 FIG 1 41 6 Remove the pump Z...

Страница 14: ...lease nut H1 FIG 1 45 3 Remove back nut I1 FIG 1 46 4 Remove the expansion vessel FIG 1 47 1 5 5 Removing the pressure gauge 1 Remove the U clip F1 FIG 1 42 2 Remove the pressure gauge coupling FIG 1...

Страница 15: ...mounting by releasing the securing clip FIG 1 49 1 50 1 5 8 Removing the heating temperature sensor N T C 1 Pull off the electrical connector and unscrew the sensor probe using a suitable spanner FIG...

Страница 16: ...on cover on the reverse of the control panel FIG 1 54 2 Remove the fuses FIG 1 55 FIG 1 54 FIG 1 55 M1 N1 Important Isolate the electrical supply to the boiler before accessing the control panel 1 5 1...

Страница 17: ...the P C B 4 Remove the screws R1 FIG 1 59 5 Separate the facia panel from the rear of the control panel 7 Remove the screws S1 and remove the P C B FIG 1 60 FIG 1 59 R1 R1 R1 FIG 1 60 S1 S1 1 6 2 Rem...

Страница 18: ...ww heating spares co Tel 0161 620 6677 18 2 FAULT FINDING 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...

Страница 19: ...heating spares co Tel 0161 620 6677 19 IS THE PUMP RUNNING NO NO YES YES POWER TO THE PUMP 1 Check that the pump is not stuck 2 Release replace pump 1 Check system pressure 2 Check pump cable 3 Check...

Страница 20: ...NO YES NO NO YES 1 Check replace air pressure switch 2 Check if reset button is jammed 3 Check replace flame detection electrode 1 Check replace connection cable 2 Check replace P C B 3 Check air pre...

Страница 21: ...lace detection electrode 4 Check replace P C B 1 Check replace spark generator 2 Check replace ignition electrodes and cables 3 Check spark gap 1 Check gas supply pressures 2 Check gas pressure to bur...

Страница 22: ...Supplied By www heating spares co Tel 0161 620 6677 22...

Страница 23: ...f L E D K Reset Button L Central Heating L E D M Transformer N Circulation Pump Relay O Fan Relay P Gas Valve Relay Q Spark Generator I C A01 Circulation Pump A02 Fan A03 Spark Generator Gas Valve Sup...

Страница 24: ...Supplied By www heating spares co Tel 0161 620 6677 24 microCombi 23 MFFI SE016A SF013A...

Страница 25: ...Supplied By www heating spares co Tel 0161 620 6677 25 4 SHORT SPARE PARTS LIST microCombi 23 MFFI...

Страница 26: ...Supplied By www heating spares co Tel 0161 620 6677 26...

Страница 27: ...Supplied By www heating spares co Tel 0161 620 6677 27 NOTES...

Страница 28: ...ecanati 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 htt...

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