E35 CONVECTION OVEN SERVICE MANUAL Revision 7/F3587 January, 2005 Manual P/N M0ME35
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY.
CONTENTS This manual is designed to take a more in depth look at the E35 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 completeness 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. SECTION PAGE NO. 1. SPECIFICATIONS..........................................................
PARTS DIAGRAMS ...................................................................................................................................... 46 11.1 11.2 11.3 11.4 Main Assembly Control Panel Assembly Gear Plate Assembly Door Assembly SERVICE CONTACTS .................................................................................................................................. 60 APPENDIX A. STACKING KIT INSTRUCTIONS..............................................................................
1. SPECIFICATIONS MODEL: E35-26 880 880 880 880 WATER ENTRY MWS 720 FRONT 165 155 (6.1) 0 55 E 3 ELECTRICAL ENTRY MWS E 3 48 0 (1.9) (28.3) 800 800 (6.5) (34.6) (3.0) (34.6) 129 165 165 (0.5) 78 78 (2.2 (34.6) 665 665 SIDE (26.2) MWS 40 40 (1.6) (24.8) E 630 630 3 VENT Ø 76 O.D. (3.0) PLAN LEGEND - Electrical connection entry point - Water entry - 3/4” BSP hose connection Dimensions shown in millimetres. Dimensions in inches shown in brackets.
MODEL: E35-30 980 980 (6.5) 800 800 (3.0) (38.6) (34.6) 165 165 12 12 78 78 (0.5) 880 880 (34.6) WATER ENTRY 720 155 (6.1) 155 (2.2) MWS E 3 0 55 MWS E 3 48 0 765 765 (1.9) (30.1) ELECTRICAL ENTRY (28.3) FRONT SIDE MWS 40 41 E (1.6) 3 VENT Ø 76 O.D. 630 630 (24.8) (3.0) PLAN LEGEND - Electrical connection entry point - Water entry - 3/4” BSP hose connection Dimensions shown in millimetres. Dimensions in inches shown in brackets.
LOCATION To ensure correct ventilation for the motor and controls the following minimum installation clearances are to be adhered to: Rear Left-hand side Right-hand side WATER SUPPLY CONNECTION Max Pressure 550 kPa / 5.5 bar / 80 psi Min Pressure 100 kPa / 1.0 bar / 15 psi 0mm / 0“ 0mm / 0” 75mm / 3.0” OVEN INTERNAL DIMENSIONS E35-26 Width 465mm / 181/4” Height 685mm / 27” Depth 760mm / 30” Oven Volume 0.24m³ / 8.5ft³ E35-30 Width 465mm / 181/4” Height 685mm / 27” Depth 860mm / 34” Oven Volume 0.
2. INSTALLATION WARNING: THIS APPLIANCE MUST BE GROUNDED. WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. It is most important that the oven is installed correctly and that the operation is correct before use. Installation shall comply with local electrical, health and safety requirements. Bench Mounting For bench mounted applications the oven must be fitted with 100mm / 4inch feet.
WATER CONNECTION Replacement of Side Racks A cold water supply should be fitted to the water inlet (3/4” BSP hose connection) which is located on the rear of the right hand side of the unit. 1) Insert rack into the oven, placing the appropriate holes over the top locating pins. 2) Lift the side rack over the bottom locating pins. Alternately, a connection elbow and sealing washer is supplied with this unit for direct connection of a 1/2” ID hose, which is recommended for easy installation and service.
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. VENT Oven vent closed (incorporates overpressure relief when closed). Oven vent open (light illuminates). 2. THERMOSTAT Temperature range 60 - 280°C / 100 - 550°F. (Light illuminates when elements are cycling ON to maintain set temperature). 1 3. TIMER 1 Hour bake timer.
3.2 EXPLANATION SYSTEM OF CONTROL Oven Lamps The two oven lamps (12 volt halogen) are on whenever the Power switch is on. The oven lamps are supplied with 12 volts from an electronic lamp transformer fitted on the oven’s control switchgear assembly. The oven lamps are on with the oven door open and closed. The E35 Turbofan convection oven features multi-function operator controls, and a combined fan motor and steam control system.
This allows only the oven lights to be operational if the oven door is opened. elements is supplied with the Phase to Neutral voltage. Thermostat Control The heating elements are rated at 2000 Watts each, therefore providing a total of 12000 Watts or 12kW of heating.
When the door is closed and power is ON, cycle timer T1 will switch power to dwell timer T3 for 90 seconds. Timer T3 will then switch power through to motor direction contactor C2 after the preset 10 second delay. The motor will then run for the remainder of the 90 second cycle. the motor circuit to create an artificial phase lag, that is normally part of the three phase supply on three phase models. Use of the three phase motor is required to retain the bi-direction operation.
the hot elements, which is supported by the hot air of the oven also turning the water droplets into steam. Summary of Components The steam is initiated by depressing the Steam switch on the control panel. When depressed the steam switch provides power one of two Steam timers which are preset to 10 seconds steam cycle duration. These Steam timers are T2 and T4.
4. MAINTENANCE WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. 4.1 CLEANING TOP LOCKED WARNING: ALWAYS TURN THE POWER SUPPLY OFF BEFORE CLEANING. UN-LOCKED IMPORTANT: THIS UNIT IS NOT WATER PROOF. DO NOT USE A WATER JET SPRAY TO CLEAN INTERIOR OR EXTERIOR OF THIS UNIT. EXTERIOR Clean with a good quality stainless steel cleaning compound. Harsh abrasive cleaners may damage the surface. UN-LOCKED LOCKED BOTTOM INTERIOR Figure 4.
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 properly. 12 months ELEMENT Check that element resistance is correct to it’s rating (refer 6.3.12). 12 months WATER NOZZLE Check for lime build-up in water nozzle.
5. TROUBLE SHOOTING WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY. FAULT THE OVEN DOES NOT OPERATE / START POSSIBLE CAUSE REMEDY The mains isolating switch on the wall, circuit breaker or fuses are “off” at the power board. Turn on. The power switch on the oven is off (‘0’). Turn switch to ‘I’ position. Incorrect electrical supply. Ensure electrical supply correct. Oven circuit breaker tripped. Identify fault. Reset circuit breaker.
FAULT NO STEAM (continued) POSSIBLE CAUSE REMEDY Steam tube blocked. Remove, clean or replace. Faulty solenoid coil. Replace. (Refer service section 6.3.16) Steam switch faulty. Replace. (Refer service section 6.3.14) Timer faulty. Adjust / Replace. (Refer service section 6.3.11) STEAMS ONLY SOMETIMES Steam timer faulty. Replace. (Refer service section 6.3.11) NO HEAT Faulty contactor. Replace. (Refer service section 6.3.11) Thermostat faulty. Replace. (Refer service section 6.3.
FAULT OVEN LIGHTS NOT ILLUMINATING POSSIBLE CAUSE REMEDY Blown bulb(s). Replace. (Refer service section 6.3.4) Faulty lighting transformer. Replace. (Refer service section 6.3.6) NOTE: If both light bulbs have blown then there will be no output from the lighting transformer. OVEN VENT INDICATOR NOT Indicator faulty. ILLUMINATING WHEN IN ‘OPEN’ POSITION Switch faulty. Replace. (Refer service section 6.3.2) OVER-PRESSURE VENT NOT OPERATING DURING STEAM CYCLE Vent blocked. Remove and clean blockage.
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 6.2 ACCESS.............................................................................................................................................. 22 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 6.3 PAGE NO. Control Panel..........................................................................................................
6.4 ADJUSTMENT / CALIBRATION ........................................................................................................ 31 6.4.1 6.4.2 6.4.3 6.4.4 6.4.5 Door Microswitch Adjustment.............................................................................................. 31 60 Minute Timer Zero Position Adjustment......................................................................... 31 Door Setting / Adjustment ...........................................................................
6.2 ACCESS 6.2.4 SIDE PANEL (LH SIDE) 6.2.1 CONTROL PANEL 1) Undo the 4 screws holding panel. 2) Remove panel. 1) Remove vent knob by pulling straight off. 2) Remove screw above vent shaft. 6.2.5 CONTROL PANEL—REAR One Screw Vent Indicator Figure 6.2.1 3) Panel is now free to hinge at bottom, take care not to drop panel or pull wires out. (support panel while working with panel open). Heating Indicator Thermostat 6.2.
6.3 REPLACEMENT 6.3.3 DOOR MICROSWITCH 1) Open oven door. 2) Remove nut on front of micro-switch. 6.3.1 POWER SWITCH Microswitch Nut 1) Pull knob off front of switch. 2) Open control panel (refer 6.2.1) and undo 2 screws securing switch. Figure 6.3.3 3) Remove 3 screws holding microswitch cover panel and drop panel down. Two Screws Figure 6.3.1 3) Transfer wires to new switch. 4) Withdraw old switch and insert new switch, securing with screws. Three Screws Figure 6.3.4 6.3.
6.3.4 LIGHT BULB / GLASS 6.3.6 LIGHTING TRANSFORMER 1) Remove LH side rack from oven. 1) With R/H service panel removed (refer 6.2.2) transfer wires to new transformer with the aid of a screw-driver. 2) Undo the four screws holding light face surround on and remove the glass and surround. Check the seal and replace if necessary. 2) Remove one screw and loosen the second screw securing the transformer. Two Screws Four Screws Figure 6.3.
5) Withdraw old thermostat and insert new thermostat, securing with nut. 6.3.9 THERMOSTAT PROBE 1) Remove R/H service panel (refer 6.2.1) and oven fan baffle (refer 6.2.3). 6) Re-assemble in reverse order. Purp le 2) Remove bracket on steam line inside oven cavity by undoing the two screws. ge an Or Yello w Thermostat Dial n Brow Brow n Two Screws Thermostat Board Figure 6.3.14 Figure 6.3.12 3) Undo the 2 bolts on the flange where the probe enters the oven (inside oven).
6.3.10 CONTACTORS / TIMERS ETC 6.3.12 OVER-TEMP THERMOSTAT 1) With R/H service panel removed (refer 6.2.2), remove the din rail mounted component. 1) Remove service panel (refer 6.2.2) and baffle (refer 6.2.3). 2) Install the new component onto the din rail. 2) Remove bracket on steam line inside oven cavity by undoing the 2 screws (figure .3.15). 3) Transfer the wires from old component to new one. 3) Undo the 2 bolts on the flange where the probe enters the oven (inside oven).
6.3.13 STEAM SWITCH 6.3.15 CHECK VALVE - UP TO S/N 261984 1) Open control panel (refer 6.2.1). NOTE: If the check valve becomes blocked or corroded, the recommended course of action is to remove the internal parts of the valve, as it is not required for operation of the oven. The procedure for this is given below. 2) Prise out or rotate the switch locking tab with a small screwdriver, and withdraw the steam switch assembly. 1) Remove the spray nozzle (refer 6.3.14).
6.3.17 COOLING FAN Two Screws 1) Remove R/H service panel (refer 6.2.2). 2) Remove the fan wires from the contactors. Fan Wires Figure 6.3.29 3) Transfer wires to new timer. 4) Withdraw old timer and insert new timer, securing with screws. Figure 6.3.26 5) Replace knob. 2) Remove the 4 screws securing the fan to it’s mounting bracket and remove fan. 6) Check timer switches off at ‘0’ mark. If slight adjustment required, loosen the mounting screws and rotate timer in direction required.
2) Undo the steam line compression fitting on the outside of the oven nearest the oven. 6.3.22 FAN SPEED SWITCH 1) Pull knob off front of switch. 2) Open control panel (refer 6.2.1) and undo 2 screws securing switch. Steam Line Compression Fitting Two Screws Figure 6.3.32 Figure 6.3.34 3) Pull assembly (steam nozzle etc) into the oven (without damaging probe lines) and support clear of the fan. 3) Transfer wires to new switch. Pull 2nd switch off and transfer to new switch.
6.3.25 DOOR OUTER GLASS 6.3.27 DOOR CATCHES 1) Ensure the door is locked shut 1) Open the oven door. 2) With a screwdriver, coin, or other suitable device, 1/4 turn the outer glass locks to release the outer glass and allow it to be hinged open. 2) Undo two screws and pull catch straight out. Top Locked Two Screws Unlocked Figure 6.3.40 Unlocked 6.3.28 DOOR HANDLE Locked 1) Open the oven door. Bottom Figure 6.3.37 2) Remove the two screw caps covering the screws on the door handle.
6.3.30 DOOR HANDLE MECHANISM 6.4 ADJUSTMENT / CALIBRATION 1) Remove outer glass (refer 6.3.24), inner glass (refer 6.3.25) and door handle (refer 6.3.27), leaving door open. 6.4.1 DOOR MICROSWITCH ADJUSTMENT 1) Open oven door. 2) Drill out the six rivets (refer figure 6.3.36, E) on the inside of the RH outer door trim (A) using a 3.5mm drill. 2) Loosen nut on front of microswitch, located at bottom right of door frame. 3) Remove four screws (F) on outside of RH outer door trim (A).
3) Undo the bolts securing the top hinge plate and bottom hinge plate to the left hand side of the oven door opening and remove. 6.4.3 DOOR SETTING ADJUSTMENT 1) Open oven door. 2) Loosen the two bolts securing the top door hinge plate to the oven. Top Hinge Plate Two Bolts Figure 6.4.4 Figure 6.4.6 3) Adjust oven door position and tighten two bolts. 4) Remove the bolt catches (secured by two screws each) from the right hand side of the door frame, and secure to the left hand side of the door frame.
6) Undo the screws securing the microswitch mounting bracket to the cover panel, turn the bracket around, and re-secure the switch (facing the other way). Figure 6.4.9 7) Refit the cover panel to the bottom of the oven with the microswitch at the left hand side of the oven. 8) Fit the top and bottom hinge plates (removed in step 2) to the right hand side of the oven door opening. (The plates should be turned upside-down from their position on the left hand side of the oven).
6.4.5 FAN & STEAM TIMER OPERATION / ADJUSTMENT All the timers have a dial on the front that adjusts the time the timer switches for when control energised. All the timers have an LED on the front that flashes when the timer is switched. T3 & T5 Dwell Timers (2) Once again these should be set the same, this is the delay time between fan directions and after steaming, when no power is applied to the fan motor. One is for the clockwise fan circuit and one is for the anti-clockwise fan circuit.
Fan / Steam Flow Chart This is a guide only, for accurate representation of all connections refer to the wiring chart.
7. ELECTRICAL CIRCUIT SCHEMATIC 7.
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8. ELECTRICAL WIRING DIAGRAM 8.
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PART NO DESCRIPTION MOTOR & ELEMENTS 020745 020885 020886 ------------------025396 020896 020762 020763 022259 Motor - 380-415V 50Hz 3ø (E35-H453-xx, E35-N453-xx, E35-X353-xx only) Motor - 220-240V 50Hz 1ø/3ø (E35-H251-xx, E35-X25x-xx only) Motor - 208-240V 60Hz 1ø/3ø (E35-P26x-xx, E35-T26x-xx, E35-X263-xx only) Motor Front Bearing - SKF 6204-2Z/C3LHT23 Motor Rear Bearing - NSK 6203Z Fan Motor Shaft Seal Element - 230-240V 2000W (E35-Hxxx-xx, E35-Nxxx-xx, E35-Txxx-xx only) Element - 208-220V 2000W (E35-P
RACKS 020809 020810 Side Rack 6 Tray LH (26” models) Side Rack 6 Tray RH (26” models) 020811 020812 Side Rack 6 Tray LH (30” models) Side Rack 6 Tray RH (30” models) 025089 025090 Side Rack 8 Tray LH (26” models) Side Rack 8 Tray RH (26” models) 023018 023019 Side Rack 8 Tray LH (30” models) Side Rack 8 Tray RH (30” models) 025916 025917 Side Rack 4 Tray LH (26” models) Side Rack 4 Tray RH (26” models) 015168 020993 Oven Rack (26” models) Oven Rack (30” models) E35 Turbofan Ovens Revision 7/F351
10.
11. PARTS DIAGRAMS 11.1.
Pos Part No. Description 1 020788 SIDE PANEL RH (E35-xxx-26 only, to s/n 215839) (Replace with 23971) SIDE PANEL RH (E35-xxx-26 only, from s/n 215840) SIDE PANEL RH (E35-xxx-30 only, to s/n 215839) (Replace with 23972) SIDE PANEL RH (E35-xxx-30 only, from s/n 215840) SERVICE ENTRY PANEL CABLE ENTRY BUSH (Not illustrated - to s/n 205999) PANEL MOUNTING BRACKET WATER INLET ELBOW (Refer 11.1.
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 041425 016241 020824 020845 020821 020820 020822 020834 020761 020764 020865 018768 020882 020775 011794 020783 014032 019369K 013506 013507 013508 020887 020892 ---------020841 020774 020829 020830 020793 020794 020899 020784 018723 020881 020879 020880 020857 020861 020883K 020856 016794 020855 020852 020853 020856 020890 020844 020802 020810 020812 023019 025090 025917 015168 020993 020
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 020803 025043 020754 023050 020737 020876 020738 ---------023051 020750 ---------021156 021157 021158 021388 021389 021551 021553 021554 021552 021555 020782 RACK LOCATION LOWER WA DOOR SEAL BOLT CATCH HINGE MOUNTING PLATE TOP (From s/n 206000) HINGE MOUNTING PLATE TOP (To s/n 205999) TOP HINGE BOLT HINGE BUSH DOOR ASSEMBLY (Refer 11.4) HINGE MOUNTING PLATE BOTTOM (From s/n 206000) HINGE MOUNTING PLATE BOTTOM (To s/n 205999) GEAR PLATE (Refer 11.
11.1.2 FRONT UPRIGHT CONTROL ASSEMBLY Pos Part No.
11.1.3 WATER INJECTION ASSEMBLY Pos Part No.
11.2 CONTROL PANEL ASSEMBLY Pos Part No. Description 1 020823 020848 020849 004705 004706 020976 020985 011760 020893 020888 020822 KNOB (VENT) COMPRESSION RING NEON INDICATOR CONTROL PANEL ºF CONTROL PANEL ºC POTENTIOMETER BRACKET POTENTIOMETER TIMER - 60 Min STEAM SWITCH ASSEMBLY SELECTOR SW.
11.3.
Pos Part No.
11.3.
Pos Part No.
11.4.1 GLASS DOOR ASSEMBLY Pos Part No. Description 1 020713K 022314 022311 022308 004715 020833 047308 020753 020752 020751 020865 022309 020730 020731 020766 DOOR INNER GLASS GLASS SEAL INNER GLASS UPGRADE KIT (UP TO S/N 39600) GLASS CLAMP DOOR COVER TOP DOOR BOLT CONNECTING ROD SPLIT PIN - 32x3.
12 13 14 15 16 17 021154 090014 021153 004716 020725 020732 020733 OUTER GLASS HINGED GLASS SEAL - 750mm (INSEAL 10 x 6mm) HINGE SPACER PLATE DOOR COVER BOTTOM DOOR FRAME DOOR TRIM INNER LH DOOR TRIM OUTER LH SD7031 COMPLETE DOOR ASSEMBLY E35 Turbofan Ovens Revision 7/F3512 -58- © Moffat Ltd, January 2005
11.4.2 STAINLESS STEEL DOOR ASSEMBLY 8 7 9 10 11 6 23 5 13 4 3 28 12 26 2 13 14 1 15 16 17 5 13 28 18 23 Pos Part No.
12.
UNITED KINGDOM BLUESEAL LTD Units 6-7 Mount St Business Park Mount Street, Nechells Birmingham B7 5QU England Tel 0121 327 5575 Fax 0121 327 9711 UNITED STATES OF AMERICA MOFFAT INC.
APPENDIX A. STACKING KIT INSTRUCTIONS A. UNPACKING Check kit includes correct parts and correct quantities for the kit purchased as listed.
B. STAND 1) Place one stand frame (A) on working surface with threaded holes face up. 2) Fit both sides (C), to the stand frame with the screws and washers (E). Ensuring the clamp plates (D) are fitted on the upright sections inside the sides (Figure A.2). 3) Place the other stand frame (A) on working surface with threaded holes face up. 4) Turn the assembly (as in 1&2 above) over onto the stand frame. 5) Secure the sides to the stand frame with the screws and washers (E).
K H M K N L G I J Figure A.6 D. TOP OVEN Remove Panels 1) Remove side panels from oven, each side panel is held on by 4 screws. 2) Remove rear RH side corner panel (power and water entry points), secured with 3 screws at front edge of panel (Figure A.3). 3) Remove the 2 front bottom side panel support brackets, 2 screws each. E. STACKING Stack Figure A.
APPENDIX B. STAND MOUNTING INSTRUCTIONS A. UNPACKING 4) Fit the other stand frame (B) with screws and washers (E). Check stand includes correct parts and correct quantities for the stand purchased as listed. NOTE: Take care which way around the frame is. For 26” oven have the oven supports facing the racks, for 30” oven have the supports (C) facing away from racks (refer figure B.2). A26C has ‘Castor Stem Sockets’ in Stand Frames, not feet.
APPENDIX C. MOTOR CONTROL AND STEAM TIMER ADJUSTMENT GUIDE FS Series Timers—Settings E35 Convection Oven (Figure C.1) Note: Superceded by FE series timers—see below. Figure C.1 Timer Type Function Time Adjust Setting Actual Time T1 FSF3 Fan motor direction 0.15 1.5 minutes T2 FSD3 Steam time 0.3 10 seconds T3 FSD3 Fan delay 0.3 10 seconds T4 FSD3 Steam time 0.3 10 seconds T5 FSD3 Fan delay 0.3 10 seconds FE Series Timers—Settings E35 Convection Oven (Figure C.
E35 Turbofan Ovens Revision 7/F3512 -67- © Moffat Ltd, January 2005
