Moffat Turbofan G32MS Service Manual
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Moffat Turbofan G32MS Service Manual

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G32MS CONVECTION OVEN
SERVICE MANUAL
Manual P/N M0MG32MS
Revision 6/F3587
February, 2005

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Summary of Contents for Moffat Turbofan G32MS

  • Page 1 G32MS CONVECTION OVEN SERVICE MANUAL Manual P/N M0MG32MS Revision 6/F3587 February, 2005...
  • Page 2 WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. Revision 6/F3590 © Moffat Ltd, February 2005...

  • Page 3: Table Of Contents

    100-120V 60Hz (USA, Canada) 220-240V (Not United Kingdom) ELECTRICAL WIRING DIAGRAMS ................46 220-240V (United Kingdom Only) 100-120V (USA, Canada) 220-240V (Not United Kingdom) SPARE PARTS......................49 IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS. Revision 6/F3590 © Moffat Ltd, February 2005...
  • Page 4 APPENDIX A. Ignition Box Specifications................65 APPENDIX B. Double Stacking Kit (Kits manufactured from March 2004)..... 66 APPENDIX C. Double Stacking Kit (Kits manufactured before March 2004)....68 APPENDIX D. Motor Replacement Kit................. 68 Revision 6/F3590 © Moffat Ltd, February 2005...

  • Page 5: Specifications

    - Water entry - ¾” BSP hose connection - Gas connection entry point - ½” BSP female (not USA / Canada) - ½” NPT female (USA / Canada only) Dimensions shown in millimetres. Dimensions in inches shown in brackets. Revision 6/F3590 © Moffat Ltd, February 2005...
  • Page 6 - Water entry - ¾” BSP hose connection - Gas connection entry point - ½” BSP female (not USA / Canada) - ½” NPT female (USA / Canada only) Dimensions shown in millimetres. Dimensions in inches shown in brackets. Revision 6/F3590 © Moffat Ltd, February 2005...
  • Page 7 110-120 V AC, 60 Hz, 2.0 A, 1 Phase NOTE: Refer to Appendix A for further 220-240 V AC, 50 Hz, 0.7 A, 1 Phase ignition control specifications. 220-240 V AC, 60 Hz, 0.7 A, 1 Phase Revision 6/F3590 © Moffat Ltd, February 2005...

  • Page 8: Installation

    4 x Oven racks This oven is fitted with an approved power 1 x Water inlet elbow (c/w washer) supply cord via an electrical junction box at the right hand rear of the unit. Should Revision 6/F3590 © Moffat Ltd, February 2005...
  • Page 9 IMPORTANT: ENSURE MANUAL ISOLATING VALVE LOCATED ON RIGHT HAND SIDE OF OVEN BEHIND GAS CONTROL SERVICE PANEL IS OPENED FOR OPERATION. Revision 6/F3590 © Moffat Ltd, February 2005...
  • Page 10 Figure 2.2 Units manufactured up to July 2002. The rating plate for the G32M and G32MS convection ovens is located at the rear of the RH side panel. Rating Plate Figure 2.3 Revision 6/F3590 © Moffat Ltd, February 2005 -10-...

  • Page 11: Operation

    Push switch to activate water injection. (Water injects into oven while the button is depressed). Light Switch Push switch to activate lights. (Lights illuminate while button is latched in the down position). Revision 6/F3590 © Moffat Ltd, February 2005 -11-...

  • Page 12: Explanation Of Control System

    The ignition control will then power required cooking temperature. the gas control valve to open the solenoids Revision 6/F3590 © Moffat Ltd, February 2005 -12-...
  • Page 13 (Roast ‘n Hold selected, and 3 Hour timer at The G32M and G32MS Turbofan convection zero position). ovens feature a Roast-and-Hold system which Revision 6/F3590 © Moffat Ltd, February 2005 -13-...
  • Page 14 On correct identification of the operating fault the Troubleshooting Guide will make reference corrective action required, or refer to the Fault Diagnosis section and/or Service section to assist in correction of the fault. Revision 6/F3590 © Moffat Ltd, February 2005 -14-...

  • Page 15: Maintenance

    OVEN BASE TRAY Remove when cleaning oven, and to allow easier cleaning of enamelled base tray. Ensure tray is refitted before use. Revision 6/F3590 © Moffat Ltd, February 2005 -15-...

  • Page 16: Routine Procedures

    Check for liming in water nozzle. 12 months HT LEAD / ELECTRODE Check for deterioration. 12 months BURNER PRESSURE Check that the unit is operating at the correct operating 12 months pressure. Revision 6/F3590 © Moffat Ltd, February 2005 -16-...

  • Page 17: Trouble Shooting Guide

    Replace. (Refer fault diagnosis 6.1.2) (Refer service section 6.3.20) No power to thermostat. Identify fault and correct. (Refer fault diagnosis 6.1.2) Thermostat faulty. Replace. (Refer fault diagnosis 6.1.2) (Refer service section 6.3.9) Revision 6/F3590 © Moffat Ltd, February 2005 -17-...
  • Page 18 Oven fan not operating. (Refer Fault: Fan doesn’t operate) Burner obstruction. Remove burner and inspect for obstruction. (Refer service section 6.3.22) Burner faulty. Replace. (Refer fault diagnosis 6.1.3) (Refer service section 6.3.22) Revision 6/F3590 © Moffat Ltd, February 2005 -18-...
  • Page 19 60 MINUTE TIMER NO TIME Timer not switching on buzzer. Replace. UP INDICATOR (Refer fault diagnosis 6.1.9) (Refer service section 6.3.7) Indicator faulty. Replace. (Refer fault diagnosis 6.1.10) (Refer service section 6.3.3) Revision 6/F3590 © Moffat Ltd, February 2005 -19-...
  • Page 20 (Refer service section 6.3.8) HOLDING TEMPERATURE Hold thermostat set tempera- Adjust to correct temperature. INCORRECT ture incorrect. (Refer service section 6.4.7) Hold thermostat faulty. Replace. (Refer fault diagnosis 6.1.16) (Refer service section 6.3.10) Revision 6/F3590 © Moffat Ltd, February 2005 -20-...
  • Page 21 (Refer service section 6.3.25) Door catch setting incorrect. Adjust. (Refer service section 6.4.5) Door pivot bushes / pins worn. Replace. (Refer service section 6.3.26) Door catch striker plate worn. Replace. (Refer installation instructions—Door handle installation) Revision 6/F3590 © Moffat Ltd, February 2005 -21-...

  • Page 22: Service Procedures

    Hold Thermostat....................34 6.3.11 Water Solenoid.....................34 6.3.12 Water Solenoid Cleaning ..................34 6.3.13 Spray Nozzle......................35 6.3.14 Fan ........................35 6.3.15 Motor ........................35 6.3.16 Overtemp (UK Units Only) ...................35 6.3.17 24 Volt Transformer (USA/Canada Units Only) ...........36 Revision 6/F3590 © Moffat Ltd, February 2005 -22-...
  • Page 23 Door Roller Catch Adjustment ................41 6.4.7 Door Alignment ....................41 6.4.8 Hold Temperature Adjustment ................41 6.4.9 60 Minute Timer Zero Position Adjustment............41 6.4.10 Burner Injector Alignment ..................42 6.4.11 Ignition Electrode Adjustment ................42 6.4.12 Gas Type Conversion ..................42 Revision 6/F3590 © Moffat Ltd, February 2005 -23-...

  • Page 24: Fault Diagnosis

    (refer to following diagram). 6.1.2 NO HEAT/BURNER NOT WORKING Burner ignition spark not working A faulty spark system is one that does not light the burner at all. If the burner is being lit Revision 6/F3590 © Moffat Ltd, February 2005 -24-...
  • Page 25 If ignition box fault indicator LED does not identify fault, and voltage correct but no spark Check voltage at the black and white lead generated, ignition box is faulty - replace. connections on control panel. Voltage should Revision 6/F3590 © Moffat Ltd, February 2005 -25-...
  • Page 26 If voltage is ok, but no spark is generated, to increase or decrease the pressure. If the Revision 6/F3590 © Moffat Ltd, February 2005 -26-...

  • Page 27: Burner Noisy (Burner Blowback / Backfire)

    ‘Roast ‘n Hold’ is not at bottom right of oven. If this activates the selected. lights, then the microswitch actuator arm behind the control panel requires adjustment. Check voltage across micro-switch terminals to neutral. Revision 6/F3590 © Moffat Ltd, February 2005 -27-...

  • Page 28: Oven Light Not Illuminating-Door Closed

    Buzzer and time up indicator will continue until control panel steam switch. the timer is manually switched off (to vertical Check voltage to the bottom terminal of the position). switch. If there is no voltage, then check wiring. Revision 6/F3590 © Moffat Ltd, February 2005 -28-...

  • Page 29: Minute Timer No Time Up Indicator

    Check voltage across terminal 2 to terminal 3 If there is no voltage then check wiring. or 4. If there is no voltage then switch is faulty—replace. NOTE: When the switch is latched, it should illuminate if operating correctly. Revision 6/F3590 © Moffat Ltd, February 2005 -29-...

  • Page 30: Access

    Four If the voltage is correct but the burner is not screws working then check wiring and ignition box. Figure 6.2.2 2) Remove side panel. Revision 6/F3590 © Moffat Ltd, February 2005 -30-...

  • Page 31: Burner Access Panel

    CONTROL VALVE ACCESS PANEL Roast‘n Hold Switch 1) Undo two screws holding the panel. Roast ‘n Hold Time 2) Remove panel. Up Indicator Roast Timer Steam Switch Light Switch Two screws Figure 6.2.4 Figure 6.2.5 Revision 6/F3590 © Moffat Ltd, February 2005 -31-...

  • Page 32: Replacement

    4) Adjust micro-switch (refer 6.4.2). Two screws 6.3.3 INDICATOR NEON LIGHT 1) With control panel open (refer 6.2.1) remove the wires from the back of the neon. Figure 6.3.5 Revision 6/F3590 © Moffat Ltd, February 2005 -32-...

  • Page 33: Hold Relay

    Loosen two screws securing thermostat phial bracket. Figure 6.3.7 3) Transfer wires to new timer. 4) Withdraw old timer and insert new timer, securing with screws. 5) Replace knob. Thermostat phial bracket Figure 6.3.10 Revision 6/F3590 © Moffat Ltd, February 2005 -33-...

  • Page 34: Hold Thermostat

    4) Withdraw the old hold thermostat phial 4) Replace the sieve and reconnect the through the side of the oven. Note the water supply. position of the phial in the bracket. Revision 6/F3590 © Moffat Ltd, February 2005 -34-...

  • Page 35: Spray Nozzle

    50 Hz Screws (3) 7) Remove fibreglass sleeving from old Terminal thermostat and fit to the replacement thermostat. Earth / 8) Replace overtemp and re-assemble in Ground reverse order. Figure 6.3.17 Revision 6/F3590 © Moffat Ltd, February 2005 -35-...

  • Page 36: Volt Transformer (Usa/Canada Units Only)

    IMPORTANT: ENSURE ELECTRODE LEAD CONNECTIONS ARE FULLY INSULATED TO AVOID SHORTS IN THE HIGH TENSION CIRCUIT. Figure 6.3.21 NOTE: Ignition box may differ from that pictured here. Replacement procedure is however identical. Revision 6/F3590 © Moffat Ltd, February 2005 -36-...

  • Page 37: Gas Control Valve

    Figure 6.3.26 4) Remove four screws in top trim and four 3) Clean or replace injector as required. screws in bottom trim of door, and remove Re-assemble in reverse order. trim panels. Revision 6/F3590 © Moffat Ltd, February 2005 -37-...

  • Page 38: Inner Glass

    2) Remove the top and bottom pivots (two open side seal facing screws each), and the door handle and downwards. Fit side seals with open roller catches (two screws top and side facing outwards. bottom). Revision 6/F3590 © Moffat Ltd, February 2005 -38-...

  • Page 39: Adjustment / Calibration

    This ensures the correct DECREASED, ENSURE THERMOSTAT IS operation of the ‘Low E’ glass. MAXIMUM TEMPERATURE 4) Reassemble and refit door to the oven. POSITION BEFORE CARRYING OUT ANY ADJUSTMENT. Revision 6/F3590 © Moffat Ltd, February 2005 -39-...

  • Page 40: Confirming Overtemp Thermostat Calibration (Uk Units Only)

    330°C, then the thermostat with the oven. Tighten the screws when is out of calibration - re-calibrate - refer the correct door position is attained. section 6.4.2. Revision 6/F3590 © Moffat Ltd, February 2005 -40-...

  • Page 41: Door Roller Catch Adjustment

    Five screws Figure 6.4.7 2) Adjust the door position to ensure that it is square with the oven. Tighten the screws. Revision 6/F3590 © Moffat Ltd, February 2005 -41-...

  • Page 42: Burner Injector Alignment

    Remove regulator spring from control. oven prior to placing it into operation. Replace with correct spring supplied with Refit service panels. conversion kit. LP Gas - Blue Spring Colour Natural Gas - Green Spring Colour Revision 6/F3590 © Moffat Ltd, February 2005 -42-...

  • Page 43: Circuit Schematics

    7. CIRCUIT SCHEMATICS 7.1 220-240V 50Hz (UK ONLY) ELECTRICAL WATER Revision 6/F3590 © Moffat Ltd, February 2005 -43-...

  • Page 44: 100-120V 60Hz (Usa, Canada)

    7.2 100-120V 60Hz (USA, CANADA) WHITE BLACK BLUE YELLOW ELECTRICAL WATER Revision 6/F3590 © Moffat Ltd, February 2005 -44-...

  • Page 45: 220-240V (Not United Kingdom)

    7.3 220-240V 50/60Hz (NOT UK) ELECTRICAL WATER Revision 6/F3590 © Moffat Ltd, February 2005 -45-...
  • Page 46 8. ELECTRICAL WIRING DIAGRAMS 8.1 220-240V 50Hz (UK ONLY) Revision 6/F3590 © Moffat Ltd, February 2005 -46-...
  • Page 47 8.2 100-120V 60Hz (USA, CANADA) 208V 240V ORANGE Revision 6/F3590 © Moffat Ltd, February 2005 -47-...
  • Page 48 8.3 220-240V 50/60Hz (NOT UK) 50Hz 60Hz Revision 6/F3590 © Moffat Ltd, February 2005 -48-...
  • Page 49 Fan Motor Kit (220-240V) 015821K Fan Motor Kit (110V) 015598 Oven Fan Steam System 020851 Water Solenoid (240V) 021617 Water Solenoid (110V) 021057 Spray Nozzle Assembly 021526 Water Inlet Elbow 021527 Washer Revision 6/F3590 © Moffat Ltd, February 2005 -49-...
  • Page 50 Propane Gas to Natural Gas Conversion Kit (UK Only) Stacking Kits 025739 Double Stacking Kit (From S/N 270991) 025013 Double Stacking Kit (To S/N 270990) 025861 Double Stacking Kit - G32M or MS on E89 (From S/N 270991) Revision 6/F3590 © Moffat Ltd, February 2005 -50-...
  • Page 51 DOUBLE STACKING KIT - G32M or G32MS (PART NO 025739 - FROM S/N 270991) (PART NO 025013 - TO S/N 270990) COOKIE KIT—SIX TRAY OPTION (PART NOS 017156 & 017157) A25 STAINLESS STEEL STAND Revision 6/F3590 © Moffat Ltd, February 2005 -51-...

  • Page 52: Parts Diagram

    11. PARTS DIAGRAMS 11.1 MAIN ASSEMBLY Revision 6/F3590 © Moffat Ltd, February 2005 -52-...
  • Page 53 ---------- CONTROL PANEL ASSEMBLY (REFER SECTION 11.2) 021638 PIN CIRCLIP 013610 BUSH 044210 SPIRE CLIP 021637 MICROSWITCH BUTTON 024791 MICROSWITCH ROD 017929 DAMPER ROD CLIP 024802 MICROSWITCH 013977 INSULATOR 024584 MICROSWITCH BRACKET Revision 6/F3590 © Moffat Ltd, February 2005 -53-...
  • Page 54 WATER INLET ELBOW 021527 WATER INLET WASHER 019380 OVERTEMP BRACKET (UK ONLY) 019369K OVERTEMP THERMOSTAT KIT (UK ONLY) (UP TO S/N 262065) (KIT INCLUDES 025400 OVERTEMP) 025400 OVERTEMP THERMOSTAT (UK ONLY) (FROM S/N 262066) Revision 6/F3590 © Moffat Ltd, February 2005 -54-...

  • Page 55: Control Panel Assembly

    11.2 CONTROL PANEL ASSEMBLY 11.2.1 G32M CONTROL PANEL ASSEMBLY Revision 6/F3590 © Moffat Ltd, February 2005 -55-...
  • Page 56 3 HOUR TIMER (240V 60Hz) 015823 3 HOUR TIMER (110V 60Hz) 021534 RELAY (240V) 021535 RELAY (110V) 011794 BUZZER (240V) 015822 BUZZER (110V) 024703 BUZZER/RELAY BRACKET 011760 60 MINUTE TIMER 024774 THERMOSTAT Revision 6/F3590 © Moffat Ltd, February 2005 -56-...
  • Page 57 11.2.2 G32MS CONTROL PANEL ASSEMBLY Revision 6/F3590 © Moffat Ltd, February 2005 -57-...
  • Page 58 3 HOUR TIMER (240V 60Hz) 015823 3 HOUR TIMER (110V 60Hz) 021534 RELAY (240V) 021535 RELAY (110V) 011794 BUZZER (240V) 015822 BUZZER (110V) 024703 BUZZER/RELAY BRACKET 011760 60 MINUTE TIMER 024774 THERMOSTAT 50-320°C Revision 6/F3590 © Moffat Ltd, February 2005 -58-...
  • Page 59 FLAME SENSOR ELECTRODE (TO S/N 246143) 024127 SPARK ELECTRODES 025072 ELECTRODE MTG BRACKET (FROM S/N 246144) 024106 ELECTRODE MOUNTING BRACKET (TO S/N 246143) 024105 IGNITION ELECTRODE BRACKET SA1530 IGNITION ELECTRODE COMPLETE ASSEMBLY Revision 6/F3590 © Moffat Ltd, February 2005 -59-...
  • Page 60 (240V UNITS ONLY) 023024 IGNITION BOX FENWAL (110V UNITS ONLY) 024851 TRANSFORMER (110V UNITS ONLY)(FROM S/N 242773) 023373 TRANSFORMER (110V UNITS ONLY)(TO S/N 242772) 024800 TRANSFORMER BRACKET (110V UNITS ONLY)(TO S/N 242772) Revision 6/F3590 © Moffat Ltd, February 2005 -60-...
  • Page 61 DOOR OUTER GLASS 004452 GLASS CLAMP ANGLE PAINTED 002340 DOOR INNER GLASS 024601 DOOR TRIM TOP 020082 TOP HINGE ASSEMBLY 021468 DOOR HANDLE 024599 DOOR HANDLE BRACKET SA1586 DOOR COMPLETE (EXCLUDING HANDLE & BRACKET) Revision 6/F3590 © Moffat Ltd, February 2005 -61-...
  • Page 62 DOOR WINDOW GLASS 090201 GLASS SEAL EXTRUSION (1.44m) 024845 DOOR OUTER PANEL 090200 GLASS SEAL EXTRUSION (1.44m) 020082 TOP HINGE ASSEMBLY 004957 DOOR INNER (ENAMELLED) ---------- INSULATION 024713 DOOR HANDLE SA1587 ST/ST DOOR COMPLETE Revision 6/F3590 © Moffat Ltd, February 2005 -62-...

  • Page 63: Service Contacts

    Mulgrave VIC 3170 Fax (03) 9518 3838 Spare Parts Department Free Call 1800 337 963 Fax (03) 9518 3895 NEW SOUTH WALES - MOFFAT PTY Unit 8/142 James Ruse Drive Rosehill NSW 2142 Spare Parts Free Call 1800 337 963...
  • Page 64 UNITED STATES OF AMERICA MOFFAT INC. 3765 Champion Blvd Winston-Salem Tel 1-800-551 8795 NC27115 Fax 336 661 9546 NATIONAL COVERAGE FOR SERVICE OR MAINTENANCE DIAL FREE CALL 1800 551 8795 (USA ONLY) Revision 6/F3590 © Moffat Ltd, February 2005 -64-...

  • Page 65: Appendix A. Ignition Box Specifications

    230 Vac (220-240) Ignition Trial Period 10 Seconds Pre-purge 5 seconds Ignition Retries None Re-ignition Attempts Spark Rate 15 Hz Spark Voltage 15 kV Lockout Indicator None Minimum Flame Current 0.5 µA Revision 6/F3590 © Moffat Ltd, February 2005 -65-...
  • Page 66 11) Re-fit stacking frame, fit three screws at rear and two screws at front into the holes drilled. Side Screws Front Support pointing in. Panel. Rail. Side Support Screws Rail. pointing out. Rear Panel. Figure A. Figure B. Revision 6/F3590 © Moffat Ltd, February 2005 -66-...
  • Page 67 16) Secure the top of the chimney (6) to the top unit with the chimney support (7) and two screws. These holes may need to be drilled, ø3.5mm ( ”). 17) Ensure that all screws on the stacking kit are tightened. Figure C. Revision 6/F3590 © Moffat Ltd, February 2005 -67-...
  • Page 68 • Secure the top unit into position by replacing the three screws along the rear of the oven. Revision 6/F3590 © Moffat Ltd, February 2005 -68-...
  • Page 69 Secure the top of the chimney to the top unit with the chimney support (5) and two ” x 8A pozi screws (7). (These holes may need to be drilled, ø3.5mm ( ”)). • Ensure that all screws on the stacking kit are tightened. Figure B.1 Revision 6/F3590 © Moffat Ltd, February 2005 -69-...

  • Page 70: Appendix D. Motor Replacement Kit

    Refit fan and fan baffle from inside of oven. 50Hz Terminal 60Hz Terminal Neutral (014672K only) Screw and Motor Washer M o u n t i n g Plate Insulation Disk Fan Motor Earth / Ground Figure A. Revision 6/F3590 © Moffat Ltd, February 2005 -70-...

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