Accelerating the World of Cooking TM Service Manual FOR THE TURBOCHEF 3 240 HIGH H CONVEYOR OVEN
For further information, call 800.90TURBO or +1 214.379.
The information contained in this manual is important for the proper installation, use, maintenance, and repair of this oven. Follow these procedures and instructions to help ensure satisfactory baking results and years of trouble-free service. Errors – descriptive, typographic, or pictorial – are subject to correction. Specifications are subject to change without notice. PLEASE CAREFULLY READ THIS MANUAL AND RETAIN IT FOR FUTURE REFERENCE.
Table of Contents Safety Instructions Important Safety Information - Please Read First General Safety Information Preventing Oven Damage Reducing Fire Risk Grounding Instructions Power Cord Replacement i i i ii ii ii Specifications and Startup Oven Overview Certifications Dimensions Oven Construction Theory of Operation Power Specifications Ventilation Requirements Gas Derating Gas Setup Reading the Incoming Gas Pressure (Static) Reading the Gas Pressure at 100% Flame Reading the Gas Pressure at Minimum F
TA B L E O F CO N T E N TS Oven Modes Config Mode Smart Card Screen Updating the Firmware Accessing the Fault Count Screen Accessing the Setup Mode Accessing the Test Mode 15 15 15 16 16 16 Setup Mode Changing the Display Temperature Edit Option Screen Changing the Display Language Info Screen 16 16 16 17 17 Test Mode Accessing the Burner Control Screen Manipulating the Top and Bottom Blowers Viewing the Status Indicators Entering a New Serial Number Initiating a Burn-In Test Erasing all Oven Settings
The Blower System Blower Motor Blower Motor Speed Controller (BMSC) The Burner System Air Pressure Switch Burner Transformer Combustion Blower Modulating Gas Valve Ignition Module 25 25 25 26 26 26 27 27 27 Troubleshooting Overview of Troubleshooting Fault Code Descriptions Fault Code Troubleshooting F1: Blower Fault F2: Low Cook Temp F3: No Flame F5: CC Over Temp F6: EC Over Temp F7: RTD Fault F8: High Limit Tripped F9: Belt Fault F10: Air Pressure Switch Fault Non-Fault Code Troubleshooting Cooling Syst
i SAFETY INSTRUCTIONS Important Safety Information – Please Read First Improper installation, adjustment, alteration, service, or maintenance of this equipment can cause property damage, injury, or death. Thoroughly read the installation, operating, and maintenance instructions before installing or servicing this equipment.
ii Reducing Fire Risk If materials inside the oven ignite or if smoke is observed, 1.Keep the oven window closed. 2.Turn off the oven. 3.Disconnect the power cord or shut off power at the fuse/circuit breaker panel. aCarefully attend the oven if paper, plastic, or other combustible materials are placed inside the oven X X X X to facilitate cooking. DO NOT leave items in the cook cavity when the oven is not in use. DO NOT cook items wrapped in cling wrap or plastic film. DO NOT overcook food.
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Specifications and Startup
1 Overview Figures 1 and 2. For part numbers, see the appendix. 1. Air filter, 11.75” x 7.5” (298 mm x 190 mm) 2. Idle button (page 21) 3. Left end bell (page A-12) 8. Window (optional feature) 9. Hi-limit reset switch 10. Burner compartment cover 11. Cooling fan tube 12. Air filter, 9” x 3.25” (228 mm x 83 mm) 13. Cooling fan tube access thumb screw 14. Burner compartment cover access screws 4. Right end bell (page A-8) 5. VFD display and keypad (page 21 and A-8) 6. Chain guard 15.
2 S P E C I F I C AT I O N S A N D S TA R T U P Certifications cULus GAS FIRED LISTED, UL EPH, FCC Power Specifications Electrical North America EU / Asia Dimensions With End Bells Closed - Width: 72.13” (1832 mm) - Depth: w/ window: 55.25” (1403 mm) - Depth: w/o window: 52.85” (1342 mm) - Height: 19.00” (483 mm) With End Bells Open - Width: 87.53” (2223 mm) - Depth: w/ window: 59.20” (1504 mm) - Depth: w/o window: 56.80” (1443 mm) - Height: 19.
3 Gas Setup A digital manometer that will read 0.10” WC (2.54 mmH2O, 0.249 mb) must be used to properly set all pressures. If the minimum pressure is not set correctly, the oven temperature will slowly rise in stand-by mode and eventually cause cooking issues as well as trip the high limit temperature switch. Digital manometers (HHC3001) are available through TurboChef; call 800.90TURBO (+1 214-379-6000) for pricing and availability. For information on accessing the burner control, see page 18.
4 S P E C I F I C AT I O N S A N D S TA R T U P Reading the Gas Pressure at Minimum Flame 1. Remove either the red or white wire (Figure 4). 2. Attach the electric manometer to the lower tap of the gas valve (Figure 4). 3. Verify that the minimum operating pressure is 0.10” W.C. (2.54 mmH2O, 0.249 mb). 4. If not, use a 5mm nut driver to adjust the 5mm nut until the electric manometer reads 0.10” W.C. (2.54 mmH2O, 0.
Cleaning
5 Cleaning the Oven Supplies and Equipment Follow the steps below daily to help maintain your HhC oven. TurboChef-approved oven cleaner, nylon scrub pad, cleaning towels, disposable gloves Daily Cleaning Procedures Step 1: Prepare the Oven -Press the back/off key (page 9) to turn the oven off. -Ensure cooling down has completed. Step 1 CAUTION: Injury can occur if oven is not allowed to cool properly before cleaning. DO NOT attempt to clean until the “cooling down” message has disappeared.
6 CLEANING Deep Cleaning Procedures TurboChef recommends deep cleaning the oven once a month (or more frequently depending on use) to ensure optimal performance. Use only TurboChef-approved cleaner. Using any other cleaning product can damage critical parts and may void the oven’s warranty. Step 1: Prepare the Oven -Press the back/off key (page 9) to turn the oven off. -Ensure cooling down has completed. Step 1 CAUTION: Injury can occur if oven is not allowed to cool properly before cleaning.
7 Step 7: Remove and Clean the Conveyor (requires TWO people) -Position one person at each end of the conveyor. -Lift the conveyor assembly up and then towards the left side of the oven until the conveyor drive chain has enough slack for removal. -Remove the conveyor drive chain. Step 7 WARNING: Never attempt to remove the conveyor with fewer than 2 people. -Lift the conveyor and push it through the right side of the oven for removal. -Wash, rinse, and dry the conveyor with a clean towel.
8 CLEANING Step 12: Clean the Oven Interior -Spray the bottom and sides of the oven interior with TurboChef Oven Cleaner to break apart any heavy stains. Allow cleaner to penetrate stains for five minutes. -Scrub the oven interior with a nylon scrub pad. -Wipe the oven interior with a clean, damp towel. Step 12 WARNING: Be sure to THOROUGHLY remove all cleaner residue.
Standard Oven Operation
9 2 2 High h Conveyor by TurboChef TM BACK OFF IDLE ST Figure 5: Oven Controls 5 ERGE NCY EM 3 4 6 OP 1 Oven Controls Figure 5 1. Display 4. Back/Off Key The display shows current oven operation and/or user programming information. Depending on the mode the oven is in, the back/off key will return the oven to the previous screen or turn the oven off. 2.
10 S TA N DA R D O V E N O P E R AT I O N 1 7 4 BREAKFAST DINNER BREAKFAST OVEN OFF BELT F 5:00 DESSERT LUNCH 2 WARMUP OVEN TCC = 275F BTM AIR 60 % BREAKFAST TOP AIR 80 % 5 BREAKFAST 5:00 3:20 DINNER 2:00 4:00 2:00 3:00 LUNCH 2:30 2:45 DESSERT 3 SOAKING BELT F 5:00 BELT R 3:20 TOP AIR 40 % LIGHTING BREAKFAST BELT F 5:00 BELT R 3:20 BTM AIR 100 % BELT R 3:20 BREAKFAST TOP AIR 80 % TOP AIR 30% OVEN IDLE PRESS ANY KEY SET 475F BTM AIR 30% 9 SET 475F BELT F 5:00 BTM AIR 40 %
11 -MODE 9 when the user selects a belt speed and the set cooking temperature is lower than the oven’s current temperature. Mode 3: Lighting Mode during which the ignition module applies voltage to the spark rod to start the burner. Happens When... -The user selects a belt speed from MODE 2. Goes To... -MODE 4 when the control board receives a signal from the flame sensor that a flame is present. -MODE 6 if the oven’s current temperature is within 25°F (14°C) of the oven’s set temperature.
12 S TA N DA R D O V E N O P E R AT I O N Mode 8: Idle Mode during which both blowers are reduced to 30% to save power. All other oven components remain the same. Happens When... -The user presses the idle key from MODE 6. Goes To... -MODE 6 when the user presses the idle key, up key, down key, or any soft key. -MODE 7 when the user presses the back/off key. When the rigid option is enabled, the soft keys displayed in Figure 7 are disabled and no menu editing is allowed.
13 - ---> (R1) moves the cursor to the right. The cursor starts at the far left character. If ---> is pressed when the cursor is on the far right character, the cursor moves to the far left character. Adjusting the Temperature Figure 7 - <--- (L1) moves the cursor to the left. The cursor starts at the far left character. If <--- is pressed when the cursor is on the far left character, the cursor moves to the far right character. 2. Adjust the temperature. 3.
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Oven Modes
15 The Config Mode Updating the Firmware The CONFIG MODE (Figure 9) serves four main purposes: 1. To access the smart card screen. 2. To access the fault count screen. 3. To access the SETUP MODE. 4. To access the TEST MODE. From the oven off screen, To access the CONFIG MODE, press the up key from the OVEN OFF MODE. 2. From the COOLING DOWN or OVEN OFF MODE, press and hold the idle key until the oven resets (approximately 5 seconds). The display will go blank until the upload is complete.
16 OVEN MODES 3. To change the display language. 4. To access the info screen. Accessing the Fault Count Screen Refer to page 29 for fault descriptions. From the CONFIG MODE (Figure 9, page 15), press R1 to access the fault count screen (Figure 13). The oven will display the number of faults that have occurred since the oven fault counts were last cleared (page 20), the oven’s software was last updated (page 15), or the oven was last returned to the manufacturer’s default settings (page 20).
17 Changing the Display Language NOTE: This feature is not available on all oven models.
18 OVEN MODES From screen 1 of the TEST MODE (Figure 18, page 17), press L1 to access the burner control screen (Figure 21). 2. Press the up or down keys to change the speed of the selected blower in 5% increments. The percentage of air cannot go below 30% or above 100%. Use this mode to set gas pressures (see page 3). Viewing the Status Indicators Accessing the Burner Control Screen Figure 21 The status indicators are located at the bottom of TEST MODE screen 1 and the burner control screen.
19 e Shows whether or not the igniter is on. 0% = OFF, 100% = ON. f Shows the voltage of the power supply. 8 The second “T” is displayed while the top air BMSC is enabled and receiving a command. 9 Bottom Display Line The bottom display line shows enabled inputs and outputs on the control board. The numbers 1-10 indicate the different bottom display line, which are explained below. NOTE: A “-” or “_” displayed on the bottom display line denotes values that are not applicable to this oven.
20 OVEN MODES Initiating a Burn-In Test Clearing the Fault Counts NOTE: Burn-in tests are for manufacturing use only. DO NOT initiate a burn-in test unless expressly instructed by TurboChef. To clear the fault counts (reset all fault counts to 0), press R3 (Figure 19, page 17) on screen 2 of the test mode. The oven will ask you to confirm this action (Figure 28), press R3 to confirm or the back/off key to cancel To initiate a burn-in test, Press L2 (Figure 19, page 17) on screen 2 of the TEST MODE.
Oven Systems
21 The Control System Fuses This section contains information about the following components: -Control Board -Display -EMI Filter -Fuses -High-limit Thermostat -Idle Button -Keypad -Power Supply - 24VDC (Domestic) -Power Supply - 24VDC (International) -Relay (K3 - Gas) -Relay (K4 - Ignition) -RTD -Smart Card Reader -Speaker -Thermostat - 120ºF (Close on Rise) -Wire Harness The control circuit is ultimately protected by two 20-amp class CC fuses, which are in the line-voltage circuit (incoming voltage).
22 O V E N S YS T E M S b) If terminal resistance is incorrect, replace the power supply. 3. If correct voltage is present, disconnect the output wires and check output (-OUT & +OUT) for 24 VDC. 4. If voltage is present with output wires disconnected and not present when the wires are connected, inspect the wire harness for damage or shorts. 5. If the wire harness is intact and undamaged, the power supply is damaged or defective and must be replaced (page A-8).
23 3. If coil resistance is correct (585 k W): a) Apply line voltage to the unit. b) Check for 24 VAC at the coil of the relay when the unit is calling for heat. c) Check the state of the contacts. -If the normally open contacts (7 & 4 -or C & NO) are closed and the -normally closed contacts (7 & 1 or C -& NC) are open when coil voltage is -applied, the K4 relay is functioning -normally.
24 O V E N S YS T E M S 3. If the resistance readings are correct, reconnect the motor wiring and then apply line voltage to the unit and check for voltage applied to the motor windings. 4. If no voltage is present, ensure the CMSC is operating properly (see below). 5. If CMSC is operating properly, inspect the wire harness for damage or shorts. 6. If the wire harness is intact and undamaged, and the CMSC is operating properly, the gear drive is damaged or defective and must be replaced (page A-8).
25 windings and use Figure 31 to verify the resistance readings are correct. Accessing Parameters WARNING: DO NOT perform this procedure unless instructed by TurboChef.Changing the parameters to other than those preset by TurboChef can damage critical oven components. NOTE: “Motor Rated Speed” (07) is RPM of motor before gearbox, not after. 1. Open the right end bell (page 1). 2. Locate the CMSC (page A-8). 3. Press the M key. 4. Use the and parameters. keys to navigate the 5.
26 O V E N S YS T E M S 2. Check the input voltage on terminals L1 & L2 (208-240 VAC) and the DC voltage input on terminals 2 & 5 (0.1-10 VDC). 3. If no voltage is present, inspect the wire harness for damage or shorts (page 45). 4. If wire harness is intact and undamaged, the BMSC is damaged or defective and must be replaced (page A-8 = lower, A-12 = upper). between the two ports. The air pressure switch has one negative port and one positive.
27 To Primary From Expected Resistance Black White (240 VAC Input) 28.1 W Black Blue (240 VAC Input) 53.1 W Black Red (240 VAC Input) 62.4 W Secondary Yellow Yellow 0.80 W Figure 33: Burner Transformer Ohm Chart Combustion Blower The combustion blower is a 3000 RPM, 208240 VAC, 0.33 A, 50/60 hz, blower motor. The winding resistance is 92 W. The combustion blower receives line voltage (208-240 VAC) from the K3 relay.
28 O V E N S YS T E M S 1. Shut off the gas supply. Testing Procedure for Testing Flame Rectification 2. Disconnect the wire spark cable from the stud terminal of the ignition module. This will isolate the burner spark rod from the ignition module. Figure 35 1. Ensure the oven is in the off or cooling down mode (page 10). 2. Remove the flame signal ground wire from the ignition module. 3. Connect a DC multipurpose meter that is able to read micro amps (uA) in series with the flame signal ground wire.
Troubleshooting
29 Overview of Troubleshooting This section contains information on the following: - Fault code descriptions - Fault code troubleshooting - Non-fault code troubleshooting Fault Code Descriptions Fault codes are logged in a fault counter (page 16) for troubleshooting. Upon completing the service call and restoring successful operation of the oven, the technician should clear all faults (see page 20).
30 T R O U B L E S H O OT I N G F8: High Limit Tripped F10: Air Switch Fault This fault is displayed if the high limit switch trips. The switch trips when the high limit probe reads approximately 600°F (315.5°C). This fault occurs if the air pressure switch on the burner fails to close when the burner circuit is energized. The fault is cleared from the display when the high limit switch is manually reset.
31 Fault Code Troubleshooting From TEST MODE, you can test separate oven components to help diagnose an issue. To access TEST MODE, see page 16. Troubleshooting: F1:BLOWER FAULT (Blower Failure) Access the TEST MODE. (page 16) Are the status indicators at location 6 and 7 present (pages 18-19)? NO 6 YES 7 Is the blower motor spinning freely? Open Left End Bell. Open the Right End Bell.
32 T R O U B L E S H O OT I N G Troubleshooting: F2: LOW COOK TEMP (Low Temp During Cook) Restart the oven, access the TEST MODE, and turn on both the top and bottom blowers. Are the status indicators at location 6, 7, 8, and 9 present (pages 18-19). NO Troubleshoot the blowers (page 31). YES Are the nozzles and plenums correctly installed (pages 7-8, steps 9-13)? Correctly reinstall the nozzles and plenums. NO YES Open the right end bell.
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34 T R O U B L E S H O OT I N G Troubleshooting: F3: NO FLAME (Flameout) Does the burner ignite? YES Is the set temperature higher than the cook cavity temperature? YES NO Turn the oven off and then on. Does the burner ignite and the fault clear? NO Adjust the set temperature. YES NO Is the unit calling for heat (If % on front display is greater than 0%)? Fix the connection or turn the gas supply on. YES NO Remove the cooling duct and rear access panel (page 1).
35 Does the burner transformer have 24 VAC output (page 26)? Does the burner transformer have line voltage applied to input? NO YES Replace the burner transformer (page A-8). YES NO Are the contacts on the high limit thermostat closed (page A-14)? NO YES Is the K3 gas relay closing (page 22)? YES Check the Wiring (page 45). YES Replace the K3 gas relay (page A-8). NO Is the air pressure switch closed? Inspect or replace the high limit thermostat (page A-14).
36 T R O U B L E S H O OT I N G Troubleshooting: F5: CC OVER TEMP (CC Over Temp) Open the rear access panel (page 1). Remove the white wire from the modulating gas valve (page A-14). Does the unit continue to heat? YES NO Reset the minimum flame gas pressure (page 3). Does the oven continue to heat? YES Replace the modulating gas valve.
37 Troubleshooting: F6: EC OVER TEMP (EC Over Temp) Are the air filters on the left end bell clean (page 1)? NO Clean the air filter(s) (page 5). YES YES Is the oven hot? NO YES Open the left end bell. Are the cooling fans running? Access TEST MODE (page 16). Is the status indicator at position “b” (page 18-19) less than 65? NO Replace the I/O control board (page A-8). YES NO Check for -Obstructions in the cooling tunnel. -Dirt or debris in the cooling fan blades.
38 T R O U B L E S H O OT I N G Troubleshooting: F7: RTD FAULT (RTD Failure) Is the RTD connected properly to the I/O control board (page 45)? Open the right end bell. Replace the RTD (page A-8). Replace RTD (page A-8). YES YES Is the RTD damaged or defective (page 23)? NO Is the RTD open? Using an ohmmeter, measure at the control board (pages 4547). RTD should measure approximately 4-5 W. (See page 24 for ohm/temperature chart.) Correct wiring (page 45).
39 Troubleshooting: F9: BELT FAULT (Total Belt Run Failure) Are there any obstructions that are blocking the conveyor’s movement or is the conveyor belt damaged? YES Remove obstruction or replace/repair the conveyor and restart the oven. Is the F9 fault code still present? NO Remove the chain guard (page A-6). Is the chain damaged or obstructed in any way? YES NO NO YES Operate the oven as you would normally. Correct wiring (page 45). NO Open the right end bell.
40 T R O U B L E S H O OT I N G Troubleshooting: F10: Air Pressure Switch Fault Are all the contacts on the high limit thermostat closed? NO YES YES Replace the burner transformer (page A-8). NO Is the wiring correct (page 45)? YES NO Is the air tube connected tightly? YES NO YES YES Is the combustion blower running? YES Replace the combustion blower (page A-14). NO Is the air pressure switch closed? Investigate the reason for the high limit tripping.
41 Non-Fault Code Troubleshooting This section provides troubleshooting tips for issues that may occur independently of an oven fault. Troubleshooting: Cooling System Issue Is the oven in an area of moderate temperature (120ºF [49ºC] or cooler)? NO YES Does the oven have room to ventilate (not tightly enclosed by other appliances or fixtures)? Relocate oven to cooler area. Move oven to open area or remove items that are in close proximity.
42 T R O U B L E S H O OT I N G Troubleshooting: Food Not Cooking Properly Does the problem occur for all programmed recipes? For example, are all recipes undercooked/overcooked/etc.? NO Has the oven been cleaned or moved prior to the problem starting? NO YES Are there any fault codes present (page 29-30)? Is the food item in the correct starting state (e.g., frozen, fresh, etc.)? NO YES Troubleshoot the fault(s) using the steps on pages 31-40.
43 Troubleshooting: No Display - Screen is Blank Does the keypad beep when a key is pressed? YES NO Replace the fuses (page A-8). Is wiring from the control board to the display (including the ribbon cable) OK (page 45)? NO Is the 24 VDC power supply receiving power? Correct wiring. If ribbon cable is damaged, replace the keypad (page A-8). Replace the power supply (page A-8).
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Schematics
45 S C H E MAT I C S
46 S C H E MAT I C S
47 S C H E MAT I C S
Appendix A - Replacing Oven Components
A- 1 Replacing Oven Components WARNING: Before removing or replacing any oven component, thoroughly read the safety instructions found at the front of this manual and Oven Systems (pages 21-28). Adhere to all precautions and warnings outlined in these sections, as failure to do so could result in serious injury or death. To Replace This...
A- 2 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS To Replace This...
A- 3 To Replace This...
A- 4 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS To Replace This...
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A- 6 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS Replacing Items - No Panel Removal Required WARNING: Before removing or replacing any oven component, thoroughly read the safety instructions found at the front of this manual and Oven Systems (pages 21-28). Adhere to all precautions and warnings outlined in these sections, as failure to do so could result in serious injury or death.
A- 7 Item Part Number Hardware Description Hardware Part Number(s) Caster 102799 Use lifters - see Installation Manual for instructions.
A- 8 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS Replacing Items - Right End Bell WARNING: Before removing or replacing any oven component, thoroughly read the safety instructions found at the front of this manual and Oven Systems (pages 21-28). Adhere to all precautions and warnings outlined in these sections, as failure to do so could result in serious injury or death.
A- 9 Part Number Hardware Description Hardware Part Number(s) Blower Motor, Lower HHC-6520 Key, 3/16 Shim, Shaft Seal Sealing Block, Blower Washer, Wave Spring Clamp, Blower Seal Nut, 1/4-20, Serrated Hex Flange, Plated Steel 100731 (to wheel) 700-0284 (to wheel) NGC-1024 (to wheel) 102436 (to wheel) NGC-1023 (to wheel) 100906 (x8 - to oven) Blower Motor Controller (BMSC), Lower 103580 Nut, #6-32, Serrated Hex Flange, SS 100902 (x4) Blower Wheel, Lower 103567 See “Blower Motor” hardware See “
A- 1 0 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS Gear Drive Assembly Detail Nutplate, Drive Bracket Nutplate, Drive Bracket Weldment, Bracket, Split Belt Panel, Conveyor Drive Geared Hub Weldment, Bracket, Single Drive Panel, Conveyor Drive Spur Gear, 3.5 PD, 5/8-inch Bore Gear Drive, Dual Belt Weldment, Shaft, Internal Drive Collar, 5/8-inch Shaft Weldment, Shaft, Internal Drive Gear Drive, Single Belt Sprocket, 1” Bore Spur Gear, 3.5 PD, 5/8-inch Bore Spur Gear, 2.
A- 1 1 Item Part Number Hardware Description Hardware Part Number(s) Bolt Retainer Bracket HHC-6426 None N/A Collar, 5/8-inch Shaft 100257 None N/A Gear Drive, Dual Belt HHC-4120 Washer, Thrust, 5/8” ID x 1/16 THK Screw, 1/4-20 x 3/4 Lg, PHTRHD, SS Nut, 1/4-20, Serrated Hex Flange, Plated Steel 103470 (x1 each) 101399 (x4 each) 100906 (x4 each) Gear Drive, Single Belt HHC-6538 Geared Hub HHC-6607 Nutplate, Drive Bracket HHC-6396 Nut, 1/4-20, Serrated Hex Flange, Plated Steel Screw, 1/
A- 1 2 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS Replacing Items - Left End Bell WARNING: Before removing or replacing any oven component, thoroughly read the safety instructions found at the front of this manual and Oven Systems (pages 21-28). Adhere to all precautions and warnings outlined in these sections, as failure to do so could result in serious injury or death.
A- 1 3 Part Number Hardware Description Hardware Part Number(s) Blower Motor, Upper HHC-6520 Blower Motor Controller (BMSC), Upper 103580 Key, 3/16 Shim, Shaft Seal Sealing Block, Blower Washer, Wave Spring Clamp, Blower Seal Nut, 1/4-20, Serrated Hex Flange, Plated Steel Nut, #6-32, Serrated Hex Flange, SS 100731 (to wheel) 700-0284 (to wheel) NGC-1024 (to wheel) 102436 (to wheel) NGC-1023 (to wheel) 100906 (x8 - to oven) 100902 (x4) Blower Wheel, Upper 103567 See “Blower Motor” hardware See “B
A- 1 4 A P P E N D I X A - R E P L AC I N G O V E N CO M P O N E N TS Replacing Items - Burner Compartment Cover WARNING: Before removing or replacing any oven component, thoroughly read the safety instructions found at the front of this manual and Oven Systems (pages 21-28). Adhere to all precautions and warnings outlined in these sections, as failure to do so could result in serious injury or death.
A- 1 5 Part Number Hardware Description Hardware Part Number(s) Air Pressure Switch 102836 Screw, #8 x 3/4, PPHD, Plt-Stl 104178 (x2) Bracket, Thermostat HHC-6390 Screw, #8 x 3/8, Sht Mtl, PPHD, Type A, SS 101696 (x2) Burner Assembly HHC-6468 Nut, #10-32, Serrated Hex Flange, SS 100903 (x4) Clamp, Conduit, 1/2 Nominal, Zinc 103632 None N/A Combustion Motor (90-degree) 103620 Included Included Combustion Motor (Inline) - not pictured 103656 Included Included Flame Sensor 103624
For service or information: W I T H I N N O RT H A M E R I C A C A L L Customer Service at 800.90 T U R B O or O U T S I D E N O RT H A M E R I C A C A L L +1 214-379-6000 or Your Authorized Distributor Accelerating the World of Cooking TM Part Number: HHC-6652/Revision B/May 2008 Country Code: NA/EU Corporate Headquarters Global Operations Six Concourse Pkwy, Suite 190 0 Atlanta, Georgia 3 0328 U S A +1 678. 987 .1 700 P H O N E + 1 6 78. 987.
