CONTENTS This manual is designed to take a more in depth look at the G32 convection oven for the purpose of making the unit more understandable to service people. There are settings explained in this manual that should never require to be adjusted, but for com- pleteness and those special cases where these settings are required to change, this manual gives a full explanation as to how, and what effects will result.
1. SPECIFICATIONS MODEL: G32 (28.0) (31.5) WATER ENTRY ELECTRICAL ENTRY (2.0) GAS ENTRY (2.75) FRONT SIDE (4.33) PLAN LEGEND - Electrical connection entry point - Water entry - ¾” BSP hose connection - Gas connection entry point - ½” BSP female (not USA / Canada) - ½”...
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LOCATION ELECTRICAL SUPPLY SPECIFICATION OPTIONS This oven must be installed in an area of adequate air supply. The following minimum 110-120 V AC, 60 Hz, 2.0 A, 1 Phase clearances openings, servicing, 220-240 V AC, 50 Hz, 0.7 A, 1 Phase operation and installation are to be adhered to: 230-240 V AC, 50 Hz, 0.55A, 1 Phase 220-240 V AC, 60 Hz, 0.7 A, 1 Phase...
2. INSTALLATION WARNING: THIS APPLIANCE MUST BE GROUNDED. WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. This appliance must be installed in accor- LOCATION dance with national installation codes and in This oven must be installed in an area of ade- accordance with relevant national / local quate air supply.
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WATER CONNECTION Ground A cold water supply should be fitted to the Phase Neutral water inlet (¾” BSP hose connection) which is BLACK GREEN located on the rear of the right hand side of BROWN BLUE GREEN/YELLOW BLACK WHITE the unit. Alternately, a connection elbow and sealing WARNING: THIS APPLIANCE MUST...
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OVEN RACKS bottom so there is 6" (150mm) clearance from the floor to the oven's base. The oven is supplied with four general purpose oven racks. These racks incorporate 2. Unscrew vent hood plate from bottom two important safety features: oven.
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6. Screw the chimney to the rear of the top Units manufactured up to July 2002. unit with these so that the bottom of the The rating plate for the G32 convection oven chimney mates up with the flue duct of the is located at the bottom right corner of the RH bottom unit.
3. OPERATION NOTE: A full user’s operation manual is supplied with the product and can be used for further referencing of installation, operation and service. 3.1 DESCRIPTION OF CONTROLS 1. POWER Depress to switch power on or off (switch illuminates when power is on). 2.
EXPLANATION OF CONTROL The temperature control of this oven is with a SYSTEM capillary type thermostat which can be set to a required cooking temperature. The G32 Turbofan convection oven features The thermostat switch has a separate switch multi-function operator controls for which a body assembled onto the front from the shaft correct understanding of their operation is assembly and when the thermostat is set to a...
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control and gas control valve operate on 24 have different ignition sequence volts AC through a 110 volt - 24 volt re-ignition specifications. Refer to appendix B transformer. For these models the thermostat for specific model details. powers the transformer, whereas on 220-240 volt models the thermostat powers the ignition The gas solenoid valve also includes the gas control directly.
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cancel the hold circuit the Roast-and-Hold switch is turned Off. This turns off the relay which removes power from the 3 hour timer and closes the pole on the relay that feeds the main oven thermostat. The Hold indicator light above the 3 Hour timer will illuminate whenever the oven is operating in hold mode (Roast ‘n Hold selected,...
4. MAINTENANCE WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. 4.1 CLEANING LAMP GLASS To remove glasses, unscrew anti-clockwise. WARNING: ALWAYS TURN THE To replace, screw in clockwise. POWER SUPPLY OFF BEFORE IMPORTANT: DO NOT OVER CLEANING.
4.2 ROUTINE PROCEDURES PROCEDURE INTERVAL DOOR SEALS Check for deterioration. 12 months DOOR PIVOT BUSHES Check for wear. 12 months DOOR CATCH Ensure that catch is adjusted such that the door closes 12 months properly. WATER NOZZLE Check for liming in water nozzle. 12 months HT LEAD / ELECTRODE Check for deterioration.
5. TROUBLE SHOOTING WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. FAULT POSSIBLE CAUSE REMEDY THE OVEN DOES NOT The mains isolating switch on Turn on. OPERATE / START the wall, circuit breaker or fuses are “off”...
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FAULT POSSIBLE CAUSE REMEDY BURNER INCORRECT Incorrect gas type. Check appliance gas type. COLOUR (Refer installation section) (Refer installation section— Gas Connection and Incorrect burner orifice size Ensure orifice is correct. Adjustment for correct fitted. (Refer specification section) colour) Incorrect burner pressure Check gas pressure.
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FAULT POSSIBLE CAUSE REMEDY FAN DOESN’T OPERATE Thermostat not on. Turn thermostat on. (Fan only operates when the thermostat is on). Thermostat fan switch faulty. Replace thermostat. (Refer fault diagnosis 6.1.4) (Refer service section 6.3.9) Fan motor faulty. Replace. (Refer fault diagnosis 6.1.4) (Refer service section 6.3.15) Wiring.
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FAULT POSSIBLE CAUSE REMEDY 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) NO TEMPERATURE Thermostat faulty. Replace.
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FAULT POSSIBLE CAUSE REMEDY DOOR DOES NOT CLOSE Tray in way of door. Correctly position tray in rack. Door seal obstruction. Correctly install door seal. (Refer service section 6.3.25) Door handle installed Fit correctly. incorrectly. (Refer installation section) Door catch setting incorrect. Adjust.
6. SERVICE PROCEDURES WARNING: ENSURE POWER SUPPLY IS SWITCHED OFF BEFORE SERVICING. WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. SECTION PAGE NO. FAULT DIAGNOSIS ......................24 6.1.1 Oven Does Not Operate / Start................24 6.1.2 No Heat / Burner Not Working ................24 6.1.3...
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6.3.17 24 Volt Transformer (USA/Canada Units Only) ...........36 6.3.18 Ignition Box ......................37 6.3.19 Ignition Electrodes ....................37 6.3.20 Gas Control Valve....................37 6.3.21 Burner Injector .....................38 6.3.22 Burner ........................38 6.3.23 Outer Glass......................38 6.3.24 Inner Glass......................39 6.3.25 Door Seals ......................39 6.3.26 Door Pivot Bushes ....................39 6.3.27 Stainless Steel Door Outer Glass ................39 6.3.28...
problem is in the flame sensing, not spark 6.1 FAULT DIAGNOSIS ignition. Refer “Burner flame not being sensed” (following). 6.1.1 OVEN DOES NOT OPERATE / START Firstly determine if spark is being generated. Incorrect electrical supply Remove the front service panel and turn the Check that the voltage across phase and thermostat on to initiate a heating cycle.
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(pre serial number 203927) or at black an SPARK ELECTRODES THESE ELECTRODES MUST BE IN white lead connections on control panel. SURFACE COMBUSTION ZONE BLUE FLAME Voltage should be 110-120Vac. If not, check FLAME SENSOR THIS ELECTRODE for wiring or power supply fault. MUST BE IN BLUE FLAME SURFACE COMBUSTION Transformer Secondary Winding - 24Vac...
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small hole on the front face of the ignition box thermostat. With burner running a current of at the top. no less than that specified below should be read. Inspect for Diagnostic Indicator as follows: Fenwal Models 0.7 micro Amps Fenwal Ignition Box White Rodgers Models 1.0 micro Amps - 2 Flashes Indicates that there was a flame...
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number 203926, using SIT ignition boxes, To determine if valve solenoids are operating check correct supply voltage across terminal correctly, attach a pressure gauge to the T10 (red phase wire), and terminal T12 (black burner pressure test point after the gas valve, and turn thermostat on.
these terminals when ‘Roast ‘n Hold’ is not If there is no voltage, open oven door and selected. manually depress door microswitch actuator at bottom right of oven. If this activates the Thermostat faulty lights, then the microswitch actuator arm behind the control panel requires adjustment.
solenoid coil with the steam switch depressed. Timer not switching on buzzer If there is no power supply then check the With timer in zero position, check voltage to control panel steam switch. top connection (terminal one) and bottom Check voltage to the bottom terminal of the connection (terminal two) of timer.
6.1.14 ROAST TIMER (180 MINUTE) WILL 6.1.15 NO HOLD INDICATOR NOT TIME DOWN Indicator faulty No power to timer Check the voltage across the indicator termi- nals. If the voltage is correct then the indica- Check the voltage at terminal 5 on underside tor is faulty—replace.
6.2 ACCESS 6.2.1 CONTROL PANEL 1) Undo the two screws on top of control panel. Six Screws Two Screws Figure 6.2.3 6.2.4 BURNER ACCESS PANEL 1) Undo two screws holding the panel. Figure 6.2.1 2) Remove panel. 2) Panel is now free to hinge at bottom. When closing the panel ensure wires and capillary tube are clear of metal or other terminals.
6.3 REPLACEMENT 6.2.6 CONTROL PANEL—REAR Power Switch 6.3.1 LAMP BULB / GLASS Heating Indicator 1) Unscrew lamp cover(s). Thermostat Lamp Covers Buzzer Bake Time Up Indicator Bake Timer Hold Thermostat Figure 6.3.1 Roast‘n Hold Switch 2) Unscrew bulb out of fitting. Roast ‘n Hold Time 3) Screw in replacement bulb.
3) Withdraw and remove two screws holding Neon buzzer to bracket. Wires Screws Figure 6.3.3 2) From back push neon through front of panel rotating clockwise. 3) Push new neon in from front of panel, and Figure 6.3.6 reconnect wires. 4) Transfer wires to new buzzer.
3) Transfer wires to new timer. 4) Withdraw old timer and insert new timer, securing with screws. 5) Replace knob. Two Screws 6.3.8 ROAST TIMER Figure 6.3.11 1) Remove roast timer knob by pulling it firmly away from control panel. 5) Withdraw old thermostat phial through 2) Open control panel (refer 6.2.1) and undo side of oven.
4) Remove water solenoid from oven by 6.3.10 HOLD THERMOSTAT removing two screws securing the water solenoid bracket electrical supply 1) Open control panel (refer 6.2.1) and undo two screws securing hold thermostat junction box. bracket. Two Screws Two Screws Figure 6.3.14 Figure 6.3.16 2) Transfer wires to new thermostat.
5) Ensure wire connections are correct to the voltage supply—60 Hz / 50 Hz (fig 6.3.20) 6.3.16 OVERTEMP THERMOSTAT (UK UNITS ONLY) 1) Open control panel (refer 6.2.1) Spray Nozzle 2) To reset, firmly press reset button. Figure 6.3.18 WARNING: OVERTEMP BUTTON IS 2) Clean or replace as required, ensuring LIVE.
3) Remove the two screws securing the 3) Disconnect wires (earth at sensor, flame transformer to the oven. sensor and spark electrode at lead connections) from electrodes requiring replacement. 4) Unscrew screws/nuts securing electrodes and remove from bracket. Two Screws Electrode Nuts Figure 6.3.23...
Four Screws Four Screws Figure 6.3.35 5) Lift outer glass away from door. Door Seals 6) To replace, ensure that the two silicone Figure 6.3.37 rubber seals are in place on the left hand and right hand side of the door frame. 6.3.26 DOOR PIVOT BUSHES Clean the inside of the glass and refit it, ensuring that the silicone rubber seals...
Pivot (Two 6.4 ADJUSTMENT / CALIBRATION Screws) 6.4.1 REGULATOR ADJUSTMENT The appliance regulator is incorporated in the gas valve on these units. The regulator should adjusted burner Screws pressure with the main burner running. adjust: 1) Fit pressure gauge to pressure test point. 2) Remove screw cap on regulator of valve.
Thermostat Shaft 6) Adjust the calibration nut located at the Calibration base of the thermostat shaft. Fan Switch increase oven temperature, turn calibration nut anticlockwise. To decrease oven temperature, turn calibration nut clockwise. Adjustment of the calibration nut by 1° angular will alter oven temperature by approximately 2°C (3.6°F).
6.4.7 HOLD TEMPERATURE ADJUSTMENT 1) Open control panel (refer 6.2.1) 2) The hold temperature of the oven can be Actuator Arm adjusted by turning the hold thermostat dial to the desired hold temperature. Hold Thermostat Figure 6.4.7 Dial 6.4.5 DOOR CATCH ADJUSTMENT 1) Open the control panel (refer 6.2.1).
9. SPARE PARTS PART NO DESCRIPTION CONTROLS 021473 Switch - Power (220-240V) 021514 Switch - Power (110V) 011987 Thermostat 020823 Knob - Thermostat / Bake Timer 020849 Neon Indicator (220-240V) 023857 Neon Indicator (110V) 011760 Bake Timer 011794 Buzzer (220-240V) 015822 Buzzer (110V) 021476...
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IGNITION SYSTEM 023025 Ignition Box (220-240V - SIT) - From Serial Number 203927 014983 Ignition Box (220-240V, Not UK - Scarico) - Up To Serial Number 203926 018730 Obsolete Ignition Box - (220-240V UK Only - Teknigas) - Up To S/N 203926 Use replacement kit 023962 023024 Ignition Box (110V, USA/Canada - Fenwall) - From Serial Number 203927...
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Part No. Description 004723 CONTROL PANEL ºC (except UK) 004730 CONTROL PANEL ºF 004804 CONTROL PANEL ºC (UK only) 011987 THERMOSTAT 50-320 ºC 011794 BUZZER (240V) 015822 BUZZER (110V USA/CANADA ONLY) 021537 BUZZER MOUNTING BRACKET 011760 TIMER - 1 Hr 018224 HOLD THERMOSTAT KNOB 021538...
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11.3.1 IGNITION ELECTRODE ASSEMBLY - FROM SERIAL NO 218596 For units pre serial no 218596 refer section 11.3.2. Part No. Description SA 1530 IGNITION ELECTRODE ASSEMBLY (COMPLETE) 024105 IGNITION ELECTRODE BRACKET 024106 ELECTRODE MOUNTING BRACKET 024127 SPARK ELECTRODE 022902 FLAME ELECTRODE 041022 SCREW 045011...
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11.3.2 IGNITION ELECTRODE ASSEMBLY - FROM S/N 47875 TO 218595 For units pre serial no 47875 refer section 11.3.3 / 11.3.4. For units after serial number 218595 refer section 11.3.1 Part No. Description SA 1021 IGNITION ELECTRODE ASSEMBLY (COMPLETE) - OBSOLETE - REPLACE WITH 022909 ELECTRODE ASSEMBLY UPGRADE KIT 022903 IGNITION ELECTRODE BRACKET...
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11.3.3 IGNITION ELECTRODE ASSEMBLY (NOT UK) - TO SERIAL NO 47875 For units after serial number 47875 refer section 11.3.2 Part No. Description 015115 IGNITION ELECTRODE ASSEMBLY (COMPLETE) - OBSOLETE - REPLACE WITH 022909 ELECTRODE ASSEMBLY UPGRADE KIT 015316 IGNITION SPARK ROD 016051 ELECTRODE EXTENSION 015315...
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11.3.4 IGNITION ELECTRODE ASSEMBLY (UK ONLY) - TO SERIAL NO 47875 For units after serial number 47875 refer section 11.3.2 Part No. Description Part No. Description 018760 IGNITION ELECTRODE ASSEMBLY (COMPLETE) - OBSOLETE 018760 IGNITION ELECTRODE ASSEMBLY (COMPLETE) - OBSOLETE - REPLACE WITH 022909 ELECTRODE ASSEMBLY UPGRADE KIT - REPLACE WITH 022909 ELECTRODE ASSEMBLY UPGRADE KIT 015315...
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Part No. Description 019370 GAS CONTROL VALVE (240V ONLY) 015626 GAS CONTROL VALVE (110V USA/CANADA ONLY) 015541 GAS CONTROL VALVE KIT (240V - REPLACES VALVE TYPE 25M02 WITH 19370 - GAS VALVE TYPE 25M42) 019338 ELECTRICAL CONNECTOR (NOT ILLUSTRATED) 015542 CONNECTOR 3/8”...
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11. SERVICE CONTACTS AUSTRALIA VICTORIA - MOFFAT PTY HEAD OFFICE AND MAIN WAREHOUSE 740 Springvale Road Tel (03) 9518 3888 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...
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APPENDIX A. IGNITION BOX REPLACEMENT KITS A.1 TEKNIGAS TO SIT IGNITION BOX REPLACEMENT KIT For G32 gas convection ovens G32H (UK) From serial number 23020 to serial number 203926 Turn off power and disconnect from electrical supply. Open control panel. Remove ignition box mounting panel assembly (2 screws).
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A.2 WHITE RODGERS TO FENWAL IGNITION BOX REPLACEMENT KIT For G32 gas convection oven models G32W (USA/Canada) For serial number up to 203926 Turn power off and disconnect from supply. Open control panel. Remove ignition box mounting panel assembly (2 screws). Unscrew transformer from panel (for re-use on new assembly).
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APPENDIX B. IGNITION BOX SPECIFICATIONS B.1 110 VOLT G32 MODELS, USA / CANADA Up to serial number 203926 Make White Rodgers Type 50D20-150 or 50D20-152 Case Colour White Voltage 24Vac (18-30Vac), 50Hz Ignition Trial Period 7 Seconds Pre-purge 0 seconds Ignition Retries 2 (60 second purge) Re-ignition Attempts...
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B.2 220-240 VOLT G32 MODELS Up to serial number 203926 UK Models Only Make Black Teknigas Type 703-05-10 Case Colour Black Voltage 230-240 Vac Ignition Trial Period 10 Seconds Pre-purge 5 seconds Ignition Retries None Re-ignition Attempts Spark Rate Spark Voltage Lockout Indicator None Minimum Flame Current...
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