Groen CC20-E Operator's Manual
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Groen CC20-E Operator's Manual

Groen CC20-E Operator's Manual

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INTRODUCTION
How to Use This Manual
This manual covers the basic areas to help you service the combination
steamerovens.
Before using this manual, you should have knowledge of combination
steameroven operation as described in the Operator Manuals, and a good
understanding of service techniques as presented in the Groen Service School.
It is also recommended that you read and become familiar with the Water
Conditioning section in the Operator Manual. Water quality problems are the most
common cause of steamer failure.
This manual is organized as follows:
Sections CC10-E, CC20-E, CC10-G, CC20-G, C/2-E and C/2G provide
specifications, installation check procedures, a basic theory of operation, electrical
diagrams, and an illustrated parts list for each combination oven.
The SERVICE CODES section is a guide to help you troubleshoot oven problems
when a service code is displayed in the Time display window, or in the Time display
and Cook Temperature display windows.
The TROUBLESHOOTING section guides you through general troubleshooting
procedures for problems that could occur. All possible problems, of course, could
not be listed in this service manual; however, the more common faults are
included.
Voltage, current, and continuity check measurements, component replacement
procedures, and solid-state calibration instructions are located in the
MAINTENANCE section.
The TECHNICAL BULLETINS section should be used to file all of the technical
briefs sent from the factory. When you receive a technical brief, remove the
numbered label from the brief and place it in the appropriate subject area in the
manual; then file the bulletin in numerical sequence in this section. When you
come across the numbered label, go to the technical brief, with the same number,
for additional service information.
The INDEX is an alphabetical listing of the topics covered in this manual, keyed to
the page number where each topic begins.
This non-warranty symbol
is used throughout the manual to tell you which repair
actions may not be covered in the equipment warranty.
This service manual should be taken with you on all oven service calls.
Use only Groen Certified Replacement Parts when performing oven repairs.
1-1

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Summary of Contents for Groen CC20-E

  • Page 1 Before using this manual, you should have knowledge of combination steameroven operation as described in the Operator Manuals, and a good understanding of service techniques as presented in the Groen Service School. It is also recommended that you read and become familiar with the Water Conditioning section in the Operator Manual.
  • Page 2 INTRODUCTION Safety The safety precautions in this. manual are in accordance with ANSI 535 Standards. Three different signal words alert you to a hazardous situation: DANGER, WARNING, and CAUTION. DANGER: The signal word DANGER indicates that a hazardous situation is about to happen and, if not avoided, will result in death or serious injury.
  • Page 3 INTRODUCTION Safety CAUTION Oven may be hot. Take precautions to prevent any contact with hot surfaces. Be sure all interior partitions have been installed before operating the oven in any mode. All oven operators and service personnel should be familiar with correct and safe oven operating procedures.
  • Page 4 CC10-E Specifications Oven Electrical Specifications Current Rating AC Input Voltage 1-Phase 3-Phase/Line Power 280V 44.9A 27.5A 9.3KW 240V 39.1A 24.1A 9.3KW Water Line Pressure 30 to 60 PSIG. A pressure regulator is required for water pressure above 60 PSIG. Drain Connection Without Drain Box: 1.
  • Page 5 CC10-E Installation Checks General ––––– If permitted by local codes, check that hose connection is flexible to allow oven ––––– Make sure there is no heat source within 12 movement for servicing. inches of louvered right side of oven. Heat Shield - Single Cavity (1) 092210 –––––...
  • Page 6 CC10-E Sequence Of Events Prior to Serial Number C7439MS Operating Conditions • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. • There are no apparent oven operating problems. Steam Mode (Prior to Serial Number C7439MS) Refer to the Steam mode circuit diagrams on page 2-13 and/or the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events.
  • Page 7 CC10-E Sequence Of Events Prior to Serial Number C7439MS 5. When boiler water reaches “ready” temperature, relays K1, K3, and K4 deenergize and water heating elements turn off. 6. Relay K2 remains energized. 7. K5 energized. BH1 and BH2 are turned on. 8.
  • Page 8 CC10-E Sequence Of Events Prior to Serial Number C7439MS Hold Mode (Prior to Serial Number C7439MS) Refer to the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events. NOTE: Low humidity on older panels only. When “Lo” humidity is selected there is no water in steam generator.
  • Page 9 CC10-E Sequence Of Events Prior to Serial Number C7439MS Two Stage Cleaning Cycle (Prior to Serial Number C7439MS) Refer to the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events. Phase 1 1. CL:50 is displayed in the time display window. 2.
  • Page 10 CC10-E Sequence Of Events After Serial Number C7439MS Operating Conditions • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. • There are no apparent oven operating problems. Steam Mode (After Serial Number C7439MS) Refer to the Steam mode circuit diagrams on page 2-13 and/or the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events.
  • Page 11 CC10-E Sequence Of Events After Serial Number C7439MS 3. When water reaches low water probes, relays K1, K2, K3, and K4 energize. High water heating elements turn on. Relay K9 through K12 de-energize. 4. When water reaches high water probe, relay K13 de-energizes and boiler fill valve closes.
  • Page 12 CC10-E Sequence Of Events After Serial Number C7439MS Relay Operation Summary 1. K6 energized. (Fan) 2. K9 through K12 energized. (High Air) 3. K10 and K11 de-energized. 4. K9 and K12 de-energized. (High Air) Hold Mode (After Serial Number C7439MS) Refer to the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events.
  • Page 13 CC10-E Sequence Of Events After Serial Number C7439MS Two Stage Cleaning Cycle (After Serial Number C7439MS) Refer to the schematic diagrams on pages 2-16 and 2-17 for the following sequence of events. Phase 1 1. C1 is displayed in the time display window. Spray degreaser around the cavity and press “START.”...
  • Page 14 CC10-E Operation Prior to Serial Number C7439MS The model CC10-E is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. It can operate from a single-phase or three-phase, 208 or 240 volt, 60 hertz power source.
  • Page 15 CC10-E Operation After Serial Number C7439MS The model CC10-E is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. It can operate from a single-phase or three-phase, 208 or 240 volt, 60 hertz power source.
  • Page 16 CC10-E Operation Prior to Serial Number C7439MS Steam Mode Circuit (Revised 1/02) 2-13...
  • Page 17 CC10-E Operation Prior to Serial Number C7439MS Combo Mode Circuit 2-14 2-14 2-14 (Revised 1/02)
  • Page 18 CC10-E Operation Prior to Serial Number C7439MS Oven Mode Circuit (Revised 1/02) 2-15...
  • Page 19 CC10-E Electrical Diagrams Prior to Serial Number C7439MS Schematic Diagrams for CC10-E 2-16 2-16 (Revised 1/02)
  • Page 20 CC10-E Electrical Diagrams Prior to Serial Number C7439MS Schematic Diagrams for CC10-E (Revised 1/02) 2-17 2-17...
  • Page 21 CC10-E Electrical Diagrams After Serial Number C7439MS Steam Mode Circuit MOV BOARD 3 KW LINE VOLTAGE BOILER 208/220/240V ELEMENT 1ø, 3ø 3 KW 3 KW TABLE K10A K10B 2.25 KW ELEMENT 2.25 KW POWER DISTRIBUTION BLOCK 2.25 KW K11A K11B 12AWG (1ph ONLY) K12B...
  • Page 22 CC10-E Electrical Diagrams After Serial Number C7439MS Combo Mode Circuit MOV BOARD 3 KW LINE VOLTAGE BOILER 208/220/240V ELEMENT 1ø, 3ø 3 KW 3 KW TABLE K10A K10B 2.25 KW ELEMENT 2.25 KW POWER DISTRIBUTION BLOCK 2.25 KW K11A K11B 12AWG (1ph ONLY) K12B...
  • Page 23 CC10-E Electrical Diagrams After Serial Number C7439MS Oven Mode Circuit MOV BOARD 3 KW LINE VOLTAGE BOILER 208/220/240V ELEMENT 1ø, 3ø 3 KW 3 KW TABLE K10A K10B 2.25 KW ELEMENT 2.25 KW POWER DISTRIBUTION BLOCK 2.25 KW K11A K11B 12AWG (1ph ONLY) K12B...
  • Page 24 CC10-E Electrical Diagrams After Serial Number C7439MS Schematic Diagrams for CC10-E (Revised 1/02) 2-21...
  • Page 25 CC10-E Electrical Diagrams After Serial Number C7439MS Schematic Diagrams for CC10-E POWER TO RELAY BOARD 28VAC 14VAC 14VAC 14 AWG 14 AWG 2-22 (Revised 1/02)
  • Page 26 CC10-E Parts List FIGURE 1 Part Part Item Description Qty. Item Description Qty. Probe, Water ....070178 Connector, Male Brass ..071251 Thermostat .
  • Page 27 CC10-E Parts List Part Item Description Qty. Bracket Assy....070100 Motor & Heat Slinger Assy. - 280V/240V ... . . 078802 Key, 1/8’...
  • Page 28 CC10-E Parts List Part Item Description Qty. Water Heating Element - 208V ....070200 Water Heating Element - 240V ....072112 •...
  • Page 29 CC10-E Parts List Part Item Description Qty. Drip Tray ....070471 Left Side Door Switch ..078903 Left Side Rack ... . 070180 Middle Rack .

  • Page 30: Table Of Contents

    CC10-E Parts List Part Item Description Qty. Fuse, 0.2 Amp., Slow Blow ..073271 Prior to Serial No. C7439MS Relay Board Retrofit Kit ..070184 Cook Only .
  • Page 31 CC10-E Parts List Part Item Description Qty. Solenoid Valve (2-Way) ..071235 Hose Clamp ....071271 Condensate Hose, 27” Long . 071283 Spray Nozzle ... . . 078933 Drain Seal .
  • Page 32 CC10-E Parts List Part Item Description Qty. Door Assembly ... . 073284 Handle ....129723 Truss Head Screw S.S.
  • Page 33 CC20-E Specifications Oven Electrical Specifications AC Input Current Rating Voltage Power Per Line 280V, 3-Phase 65.4A 21KW 240V, 3-Phase 56.7A 21KW 480V, 3-Phase 28.3A 21KW Water Line Pressure 30 to 60 PSIG. A pressure regulator is required for water pressure above 60 PSIG.
  • Page 34 CC20-E Installation Checks General ––––– Check that water line is at least 1/2 inch ID. ––––– Make sure there is no heat source within 12 inches of louvered right side of oven. ––––– Check that water line is not putting high...
  • Page 35 CC20-E Sequence Of Events Prior to Serial Number C7439MS 208V and 240V Units Operating Conditions • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. • There are no apparent oven operating problems.
  • Page 36 CC20-E Sequence Of Events Prior to Serial Number C7439MS 2. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve opens. Boiler fill begins. 3. Relays K6, K7, and K8 energize. Fan motor turns on. 4. When water reaches low water probes, relays K2, K3, K4, R2, R3, and R4 energize.
  • Page 37 CC20-E Sequence Of Events Prior to Serial Number C7439MS 4. When oven temperature reaches the temperature set point, relays K11, K12, R11, and R12 de-energize. Air heating elements turn off. 5. Relays K11, K12, R11, and R12 will cycle ON and OFF to maintain the oven temperature.
  • Page 38 CC20-E Sequence Of Events Prior to Serial Number C7439MS Relay Operation Summary 1. R1 energized. (Mercury Relay) 2. K15 and K13 energized. (Drain and Fill) 3. K6, K7 and K8 energized. (Fan) 4. K2 through K4, and R2 through R4 energized. (Water Heat) 5.
  • Page 39 CC20-E Sequence Of Events Prior to Serial Number C7439MS 12. Relay K14 de-energizes and condensate spray valve closes. C2 is displayed in the TIME display window. Beeper sounds. Phase 2 (Oven Door Open) - add de-limer in the boiler. 13. Relays K15 and K13 energize. Boiler fills.
  • Page 40 CC20-E Sequence Of Events Prior to Serial Number C7439MS 5. When boiler water reaches “ready” temperature, relays K3 and R3 de- energize. Relays K2 and R2 energize. Water heating elements go to low fire. Relay Operation Summary 1. K15 and K13 energized. (Drain and Fill) 2.
  • Page 41 CC20-E Sequence Of Events Prior to Serial Number C7439MS 7. K11, K12, R11, and R12 energized. (Air Heat) 8. K11, K12, R11, and R12 de-energized. (Air Heat) 9. Relays K11, K12, R11 and R12 energized and de-energized. Oven Mode (Prior to Serial Number C7439MS) Refer to the Oven mode circuit diagrams on page 3-28 and/or the schematic diagrams on page 3-34 for the following sequence of events.
  • Page 42 CC20-E Sequence Of Events Prior to Serial Number C7439MS 8. When oven temperature reaches the temperature set point, relays K11 and R11 de-energize. Air heating elements turn off. Relay Operation Summary 1. K15 and K13 energized. (Drain and Fill) 2. K6 and R1 energized. (Fan) 3.
  • Page 43 CC20-E Sequence Of Events Prior to Serial Number C7439MS Phase 2 (Oven Door Open) - add de-limer to the boiler. 11. Relays K15 and K13 energize. Drain valve closes and boiler fill valve opens. Boiler fills. 12. Relays K2, K3, R2, and R3 energize. Water heating elements turn on.
  • Page 44 CC20-E Sequence of Events After Serial Number C7439MS 208V and 240V Units Operating Conditions • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. • There are no apparent oven operating problems.
  • Page 45 CC20-E Sequence Of Events After Serial Number C7439MS 2. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve opens. Boiler fill begins. 3. Relays K6, K7, and K8 energize. Fan motor turns on. 4. When water reaches low water probes, relays K2, K3, K4, R2, R3, and R4 energize.
  • Page 46 CC20-E Sequence Of Events After Serial Number C7439MS 4. When oven temperature is 5° below temperature set point, relay K12 and R12 de-energize. Relay K11 and R11 remain energized. Air heating elements controlled by K11 and R11 operate at reduced power.
  • Page 47 CC20-E Sequence Of Events After Serial Number C7439MS Two Stage Cleaning Cycle (After Serial Number C7439MS) Refer to the schematic diagrams on pages 3-32 and 3-33 for the following sequence of events. Phase 1 1. Press 9-9 on the touch pad. C1 is displayed in the TIME display window.
  • Page 48 CC20-E Sequence Of Events After Serial Number C7439MS 19. Relay K14 energizes and condensate spray valve opens. 20. Relays K2, K3, K4, R2, R3, and R4 de-energize and water heating elements turn off. 21. Relay K15 de-energizes. Drain valve opens and boiler drains.
  • Page 49 CC20-E Sequence Of Events After Serial Number C7439MS Combo Mode (After Serial Number C7439MS) Refer to the Combo mode circuit diagrams on pages 3-28 and/or the schematic diagrams on pages 3-34 for the following sequence of events. 1. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve opens.
  • Page 50 CC20-E Sequence Of Events After Serial Number C7439MS Oven Mode (After Serial Number C7439MS) Refer to the Oven mode circuit diagrams on page 3-28 and/or the schematic diagrams on page 3-34 for the following sequence of events. 1. Mercury relay R1 and relay K6 energize. Fan motor turns on.
  • Page 51 CC20-E Sequence Of Events After Serial Number C7439MS Two Stage Cleaning Cycle (After Serial Number C7439MS) Refer to the schematic diagrams on page 3-34 for the following sequence of events. No Mode Enter 99 Display shows C1. Drain valve closes K15 energized.
  • Page 52 CC20-E Sequence Of Events After Serial Number C7439MS Phase 2 (Oven Door Open) - add de-limer to the boiler. 11. Relays K15 and K13 energize. Drain valve closes and boiler fill valve opens. Boiler fills. De-limer is added to the boiler.
  • Page 53 Operation Prior to Serial Number C7439MS The model CC20-E is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. The CC20E ovens operate from a three phase power supply only.
  • Page 54 Operation Operation After Serial Number C7439MS The model CC20-E is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. The CC20E ovens operate from a three phase power supply only.
  • Page 55 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Steam Mode Circuit for 208/240 Volt Units (Revised 1/02) 3-23 3-23 3-23 3-23...
  • Page 56 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Steam Mode Circuit for 208/240 Volt Units 3-24 3-24 3-24 3-24 (Revised 1/02)
  • Page 57 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Steam Mode Circuit for 480 Volt Units (Revised 1/02) 3-25 3-25 3-25 3-25...
  • Page 58 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Combo Mode Circuit for 208/240 Volt Units Heater Diagrams (Prior to Serial No. C10129MC) NOTICE: The boiler elements in the Combo mode function the same as the Steam Mode until the water is heated and the oven reaches the Ready condition.
  • Page 59 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Combo Mode Circuit for 208/240 Volt Units NOTICE: The boiler elements in the Combo mode function the same as the Steam Mode until the water is heated and the oven reaches the Ready condition.
  • Page 60 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Combo Mode Circuit for 480 Volt Units NOTICE: The boiler elements in the Combo mode function the same as the Steam Mode until the water is heated and the oven reaches the Ready condition.
  • Page 61 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Oven Mode Circuit for 208/240 Volt Units (Revised 1/02) 3-29 3-29 3-29 3-29 3-29...
  • Page 62 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Oven Mode Circuit for 208/240 Volt Units 3-30 3-30 3-30 3-30 3-30 (Revised 1/02)
  • Page 63 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Oven Mode Circuit for 480 Volt Units (Revised 1/02) 3-31 3-31 3-31 3-31 3-31...
  • Page 64 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Schematic Diagrams for 208/240 Volt Oven 3-32 3-32 3-32 3-32 3-32 (Revised 1/02)
  • Page 65 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Schematic Diagrams for 208/240 Volt Oven (Revised 1/02) 3-33 3-33 3-33 3-33 3-33...
  • Page 66 CC20-E Electrical Diagrams Prior to Serial Number C7439MS Schematic Diagrams for 480 Volt Oven 3-34 3-34 3-34 3-34 3-34 (Revised 1/02)
  • Page 67 CC20-E Electrical Diagrams After Serial Number C7439MS Steam Mode Circuit for 208/240 Volt Units (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V...
  • Page 68 CC20-E Electrical Diagrams After Serial Number C7439MS Steam Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO POWER TO WIRES 18 AWG 600V 105°C UNLESS NOTED WIRES 18 AWG 600V 105°C UNLESS NOTED...
  • Page 69 CC20-E Electrical Diagrams After Serial Number C7439MS Combo Mode Circuit for 208/240 Volt Units (6) HEATERS 2915 W EA. MOV BOARD TB 2 TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V UNLESS NOTED WHITE BLACK...
  • Page 70 CC20-E Electrical Diagrams After Serial Number C7439MS Combo Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO WIRES 18 AWG 600V 105°C UNLESS NOTED RELAY BOARD TO DISTRIBUTION BLOCK...
  • Page 71 CC20-E Electrical Diagrams After Serial Number C7439MS Oven Mode Circuit for 208/240 Volt Units BOILER (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V...
  • Page 72 CC20-E Electrical Diagrams After Serial Number C7439MS Oven Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO WIRES 18 AWG 600V 105°C UNLESS NOTED RELAY BOARD TO DISTRIBUTION BLOCK...
  • Page 73 CC20-E Electrical Diagrams After Serial Number C7439MS Schematic DIagrams for 208/240 Volt Oven BOILER (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V...
  • Page 74 CC20-E Electrical Diagrams After Serial Number C7439MS Schematic Diagrams for 480 Volt Oven BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO WIRES 18 AWG 600V 105°C UNLESS NOTED RELAY BOARD TO DISTRIBUTION BLOCK 28VAC...
  • Page 75 CC20-E Parts List Part Item Description Qty. Thermostats With Plate Assembly ....080799 • Bracket ....

  • Page 76: Bracket Assy 1

    CC20-E Parts List MOTOR Part Item Description Qty. Bracket Assy ....070100 Motor & Heat Stinger Assy. - 208/240V ....
  • Page 77 CC20-E Parts List Part Part Item Description Qty. Item Description Qty. Prior to Serial No. C10129MC • Nut ....114815 Air Heating Element - 208V . .
  • Page 78 CC20-E Parts List Part Part Item Description Qty. Item Description Qty. Left Side Rack ... . Door Switch Bracket ..111162 080680 12a Left Side Insulation Strips . . .

  • Page 79: Prior To Serial No. C7439Ms

    CC20-E Parts List Part Item Description Qty. Fuse, 0.2 Amp., Slow Blow . . 073271 Prior to Serial No. C7439MS Relay Board Retro Kit Cook ....
  • Page 80 CC20-E Parts List Part Part Item Description Qty. Item Description Qty. Relay and Terminal Block Not Applicable Assembly, 208/240V ..Mercury Contactor, 3PST, Mercury Contactor, 2PST, 35 Amp ....
  • Page 81 CC20-E Parts List Part Item Description Qty. Valve Housing Assembly ..081601 Top Valve Assembly ..081662 Vent Hose ....
  • Page 82 CC20-E Parts List Part Item Description Qty. Door Assembly ... 080645 Handle ....
  • Page 83 C/2-E Specifications Oven Electrical Specifications AC Input Current Rating Voltage Power Per Line 280V, 3-Phase 65.4A 21KW 240V, 3-Phase 56.7A 21KW 480V, 3-Phase 28.3A 21KW Water Line Pressure 30 to 60 PSIG. A pressure regulator is required for water pressure above 60 PSIG.
  • Page 84 C/2-E Sequence of Events 208 or 240 Volts Oven/Meat Probe/Hold Mode 1. Mercury relay R1 energized. 2. Relay K6, K7 and K8 energizes. Fan motor turns on. 3. Relays K11, K12, R11 and R12 energize. Air heater elements turn on. 4.
  • Page 85 C/2-E Sequence Of Events 9. Relays K11, K12, R11 and R12 energize. Air heater elements turn on. 10. When the Meat Probe reaches set point temperature for at least 30 seconds or more, relays K11, K12, R11 and R12 de-energize. Air elements turn off. 11.
  • Page 86 C/2-E Sequence Of Events 480 Volts Oven/Meat Probe/Hold Mode 1. Relay K6 and mercury relay R1 energized. Fan motor turns on. 2. Relays K11, K12, R11 and R12 energize. Air heater elements turn on. 3. When the Meat Probe reaches set point temperature for at least 30 seconds or more, relays K11, K12, R11 and R12 de-energize.
  • Page 87 C/2-E Sequence Of Events 10. Relay K6 and R1 energize and de-energize, cycling the fan motor on for 10 seconds and off for 30 seconds. 11. When the oven cavity cools down to the hold set point temperature, relays K11, K12, R11 and R12 energize and de-energize to maintain the cavity temperature.
  • Page 88 C/2-E Operation The model C/2-E is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. The C/2-E oven operates from a three phase power supply only. It can function as a convection oven, a self-contained pressureless steamer, or as a combination oven-steamer.
  • Page 89 C/2-E Electrical Diagrams Steam Mode Circuit for 208/240 Volt Units (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V UNLESS NOTED WHITE BLACK (12) 12 AWG...
  • Page 90 C/2-E Electrical Diagrams Steam Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO RELAY BOARD 28 VAC TO DISTRIBUTION BLOCK 14 AWG 14 VAC 14 VAC 100 VA DRAIN VALVE 220V 50 VA...
  • Page 91 C/2-E Electrical Diagrams Combo Mode Circuit for 208/240 Volt Units BOILER (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V UNLESS NOTED WHITE BLACK (12) 12 AWG...
  • Page 92 C/2-E Electrical Diagrams Combo Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO RELAY BOARD 28 VAC TO DISTRIBUTION BLOCK 14 AWG 14 VAC 14 VAC 100 VA DRAIN VALVE 220V 50 VA...
  • Page 93 C/2-E Electrical Diagrams Oven Mode Circuit for 208/240 Volt Units BOILER (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V UNLESS NOTED WHITE BLACK (12) 12 AWG...
  • Page 94 C/2-E Electrical Diagrams Oven Mode Circuit for 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO RELAY BOARD 28 VAC TO DISTRIBUTION BLOCK 14 AWG 14 VAC 14 VAC 100 VA DRAIN VALVE 220V 50 VA...
  • Page 95 C/2-E Electrical Diagrams Schematic Diagram for C/2-E 208/240 Volt Units BOILER (6) HEATERS 2915 W EA. 7000 W 7000 W 7000 W TB 2 MOV BOARD TB 1 (8) 12 AWG (6) 12 AWG 200°C WIRES 105°C 600 V UNLESS NOTED WHITE BLACK (12) 12 AWG...
  • Page 96 C/2-E Electrical Diagrams Schematic Diagram for C/2-E 480 Volt Units BOILER B2 B3 MOV BOARD WIRES 14 AWG 600V 105°C UNLESS NOTED POWER TO RELAY BOARD 28 VAC TO DISTRIBUTION BLOCK 14 AWG 14 VAC 14 VAC 100 VA DRAIN VALVE 220V 50 VA...
  • Page 97 C/2-E C/2-E Parts List Sequence Of Events Part Part Item Description Qty. Item Description Qty. Left Side Rack......1 080680 Right Side Door Switch ... 081620 Middle Rack....... 5 080644 Left Side Door Switch....1 081621 Shroud with Right Side Rack ..1 080663 Drip Tray........
  • Page 98 C/2-E C/2-E Parts List Sequence Of Events Part Item Description Qty. Control Panel (Cook Only) ..124808 Control Panel (Cook, Hold and Probe) ......124309 EPROM (Cook Only; Cook, Hold and Probe)....120749 Control Panel (Programmable) ....124815 EPROM (Programmable) ..118809 Fuse 0.5 Amp, Slow Blow ..
  • Page 99 C/2-E C/2-E Parts List Parts List 31 32 33 28 29 30 129727 Figure 8. Glass Door (Revised 1/02) 3A-17 3A-17...
  • Page 100 C/2-E Parts List Part Item Description Qty. Assembly, Door Front Panel ... 133847 Screw, #10-32 x .375 Phillips Flat Head ......069723 Handle ........129723 Spacer, Cam ......123744 Assembly, Cam ....... 074252 Screw, #8-32 x 1.00 Phillips Torx Head Locking ....123718 Screw, #8-32 x .375 Phillips Torx Head Locking ....
  • Page 101 C/2-E Parts List 138658 Figure 9. Solid Door (Revised 1/02) 3A-19 3A-19...
  • Page 102 C/2-E Parts List Part Item Description Qty. Weldment, Door Front Panel .. 136054 Screw, #10-32 x .375 Phillips Flat Head ......069723 Handle ........129723 Spacer, Cam ......123744 Assembly, Cam ....... 074252 Screw, #8-32 x 1.00 Phillips Torx Head Locking ....123718 Screw, #8-32 x .375 Phillips Torx Head Locking ....
  • Page 103 CC10-G Specifications Oven Electrical Specifications 115 Volts AC, 1-Phase, 60 Hz, 15 Amps. Gas Supply Requirement 5" W.C. (min) to 14" W.C. (max) for natural gas. 3.7" W.C. manifold pressure. 12" W.C. (min) to 28" W.C. (max) for propane gas. 10.3" W.C. manifold pressure.
  • Page 104 CC10-G Orifice Size Charts ORIFICE SIZE CHART NATURAL GAS Installation Site Oven Boiler Oven Runner Arm Altitude Part No. Drill Size Part No. Drill Size Part No. Drill Size (feet) Zero or at Sea Level 085166 085167 1.50mm 085158 1000 2000 093435 1.45 mm...
  • Page 105 CC10-G Installation Checks General to local codes. ––––– Make sure there is no heat source within 12 ––––– If permitted by local codes, check that hose inches of louvered right side of oven. Heat connection is flexible to allow oven Shield P/N 098407 - Single Qty (1) movement for servicing.
  • Page 106 CC10-G Sequence Of Events Prior to Serial Number GC7243MS Operating Conditions • Pilot burner flame established. • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. Press COMBO key and ON simultaneously. •...
  • Page 107 CC10-G Sequence Of Events Prior to Serial Number GC7243MS 7. K11 and K12 de-energized. (High and Low Air) 8. K3 de-energized. (High Boiler) 9. K14 energized. (Condensate Spray) Combo Mode (Prior to Serial Number GC7243MS) Refer to the Combo mode circuit diagram on page 4-16 and/or the schematic diagram on page 4-19 for the following sequence of events.
  • Page 108 CC10-G Sequence Of Events Prior to Serial Number GC7243MS 6. K13 de-energized. (Fill) 7. K11 and K12 de-energized. (High and Low Air) 8. K3 de-energized. K2 remains energized. (High and Low Boiler) 9. K14 energized. (Condensate Spray) 10. K12 and K11 energize. 11.
  • Page 109 CC10-G Sequence Of Events Prior to Serial Number GC7243MS 5. When water level reaches the low water level probe, relays K2 and K3 energize. Gas valves SV3 and SV4 open. 6. When the water temperature is approximately 150°F, relays K2 and K3 de- energize, and gas valves SV3 and SV4 close.
  • Page 110 CC10-G Sequence Of Events After Serial Number GC7243MS Operating Conditions • Pilot burner flame established. • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. Press COMBO key and ON simultaneously. •...
  • Page 111 CC10-G Sequence Of Events After Serial Number GC7243MS 3. K6 energized. (Fan) 4. K12 energized. (Low Air) 5. K11 energized. (High Air) 6. K2 and K3 energized. (Low and High Boiler) 7. K13 de-energized. (Fill) 8. K11 and K12 de-energized. (High and Low Air) 9.
  • Page 112 CC10-G Sequence Of Events After Serial Number GC7243MS Relay Operation Summary 1. K15 and K13 energized. (Drain and Fill) 2. K6 energized. (Fan) 3. K12 energized. (Low Air) 4. K11 energized. (High Air) 5. K2 and K3 energized. (Low and High Boiler) 6.
  • Page 113 CC10-G Sequence Of Events After Serial Number GC7243MS Relay Operation Summary 1. K15 and K13 energized. 2. K6 energized. (Fan) 3. K12 energized. (Low Air) 4. K11 energized. (High Air) 5. K2 and K3 energized. 6. K13 de-energized. 7. K3 de-energized. 8.
  • Page 114 CC10-G Sequence Of Events After Serial Number GC7243MS 14. Relay K15 energizes and drain valve closes. K13 energizes and boiler fill valve opens. Boiler fills. 15. When water reaches low water level probe, relays K2 and K3 energize. Gas valves SV3 and SV4 open. 16.
  • Page 115 CC10-G Operation Prior to Serial Number GC7243MS The model CC10-G is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. This gas oven operates from a 115 volt, single-phase, 60 hertz, 15 ampere power source.
  • Page 116 CC10-G Operation After Serial Number GC7243MS The model CC10-G is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. This gas oven operates from a 115 volt, single-phase, 60 hertz, 15 ampere power source.
  • Page 117 CC10-G Electrical Diagrams Prior to Serial Number GC7243MS Pilot Ignition Circuit (Revised 1/02) 4-15 4-15...
  • Page 118 CC10-G Electrical Diagrams Prior to Serial Number GC7243MS Steam Mode Circuit (Revised 1/02) 4-16 4-16...
  • Page 119 CC10-G Electrical Diagrams Prior to Serial Number GC7243MS Combo Mode Circuit (Revised 1/02) 4-17 4-17...
  • Page 120 CC10-G Electrical Diagrams Prior to Serial Number GC7243MS Oven Mode Circuit 4-18 4-18 (Revised 1/02)
  • Page 121 CC10-G Electrical Diagrams Prior to Serial Number GC7243MS Schematic Diagram for CC10-G (Revised 1/02) 4-19 4-19...
  • Page 122 CC10-G Electrical Diagrams After Serial Number GC7243MS Pilot Ignition Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 4-20 (Revised 1/02)
  • Page 123 CC10-G Electrical Diagrams After Serial Number GC7243MS Steam Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD (Revised 1/02) 4-21...
  • Page 124 CC10-G Electrical Diagrams After Serial Number GC7243MS Combo Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 4-22 (Revised 1/02)
  • Page 125 CC10-G Electrical Diagrams After Serial Number GC7243MS Oven Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD (Revised 1/02) 4-23...
  • Page 126 CC10-G Electrical Diagrams After Serial Number GC7243MS Schematic Diagram for CC10-G GRAY 1.25 AMP 1.25 AMP RELAY BOARD 4-24 (Revised 1/02)
  • Page 127 CC10-G Parts List Part Item Description Qty. Thermostat ....071499 Water Probe Harness ..076494 Probe, Water ....070178 Fitting .

  • Page 128: Motor Shaft Housing Seal . . 1

    CC10-G Parts List MOTOR Part Item Description Qty. Bracket Assy ......070100 Motor & Heat Stinger Assy..090760 Key, 1/8" Square 303 S.S..071288 Insulation Retainer Assy..071228 Insulation Nut Plate ....069770 Motor Seal Assy ...... 071299 • Washer Seal Housing ... 070458 •...
  • Page 129 CC10-G Parts List Part Part Item Description Qty. Item Description Qty. Igniter Module......085153 Main Gas Valve (Prop. Gas) High Voltage Cable ....106495 Prior to Serial #GC13256..098475 Boiler Manifold ......Starting with Serial #GC13256 Fig. 4 (Conversion Kit) ..... 079802 Pilot Burner Assembly Pressure Regulator (Nat.
  • Page 130 CC10-G Parts List Part Item Description Qty. Boiler Manifold Parts Assembly (Natural Gas) ..087916 Jet ........... 085167 Flame Holder......056965 Manifold........085059 Boiler Manifold Parts Assembly (Propane Gas) ..087955 Jet ........... 085169 Flame Holder......056965 Figure 4. Boiler Manifold 4-28 (Revised 1/02)
  • Page 131 CC10-G Parts List Part Item Description Qty. Oven Manifold Parts Assembly (Natural Gas) ..087913 Automatic Gas Valve....085160 Jet ........... 085166 Flame Holder......056965 Oven Manifold Parts Assembly (Propane Gas) ..087954 Automatic Gas Valve....085160 Jet ........... 085168 Flame Holder......

  • Page 132: Drip Tray.

    CC10-G Parts List Part Item Description Qty. Door Assembly ......Fig. 7 Control Panel Knob ....073430 Shroud Assembly ....087933 Right Side Door Switch ... 078904 Middle Rack ......069764 Drip Tray........070471 Left Side Door Switch ..... 081621 Left Chamber Baffle ....
  • Page 133 CC10-G Parts List Part Item Description Qty. Door Assembly ......073284 Handle ........129723 Truss Head Screw S.S.... 005764 Door Front Panel..... 073281 Insulator Board ....... 070110 Hinge ........070199 Door Spacer ......071206 Gasket ........070121 Inner Panel ......070112 Hex Head Cap Screw S.S.
  • Page 134 CC10-G Parts List Part Part Item Description Qty. Item Description Qty. Prior to Serial No. GC7243MS Prior to Serial No. GC7243MS Control Panel (Retrofit Kit) ..1 112976 Relay Board (Retrofit Kit) ..112976 Starting at Serial No. GC7243MS Starting at Serial No. GC7243MS Fuse, 0.5 Amp., Slow Blow ..
  • Page 135 CC10-G Parts List HI-LIMIT THERMOSTAT 7 7a Part Item Description Qty. Relay ........074842 Motor Run Capacitor ....090111 Motor Start Capacitor ..... 087942 Motor Relay......087948 Transformer, Pri.120V, Sec. 24V ......... 087953 Bridge Rectifier......071487 Fuse, 15 Amp, Slo-Blo ... 087946 Fuse Holder......

  • Page 136: Single Oven

    CC10-G Parts List Part Item Description Qty. Water Inlet Valve, 2-Way, Triple Type ....090827 Steam Hose, 18" Lg ..088000 Steam Hose, 2"...
  • Page 137 CC10-G Parts List Part Item Description Qty. Auto Clean Tank...... 086452 Screw, 3/8" Truss Hd ....005764 Swing Check Valve ....086461 Filler Cap......... 086468 Elbow 900, 3/8-18NPT .... 086490 Close Nipple, 3/8-18NPT ..086493 Male Adapter, 1/2-14NPT X 1/2 Hose........092104 Eductor, 1/2-14NPT....
  • Page 138 CC10-G Parts List BOILER TOP CAVITY FROM WATER VALVE BOILER BOTTOM CAVITY FROM WATER VALVE Part Part Item Description Qty. Item Description Qty. Auto Clean Tank ......086452 Swing Check Valve, 0-Ring, 1-3/8 X 2 X 3/16 ... 092102 1/2-14NPT ....... 086461 Screw, 3/8"...
  • Page 139 CC20-G Specifications Oven Electrical Specifications 115 Volts AC, 60 Hertz, 1-Phase,15 Amps. Gas Supply Requirement 5.5" W.C. (min) to 14" W.C. (max) for natural gas. 4.5" W.C. manifold pressure. 12" W.C. (min) to 28" W.C. (max) for propane gas. 10.3" W.C. manifold pressure.
  • Page 140 CC20-G Orifice Size Charts ORIFICE SIZE CHART NATURAL GAS Installation Site Oven Boiler Oven Runner Arm Altitude Part No. Drill Size Part No. Drill Size Part No. Drill Size (feet) Zero or at Sea Level 090776 1.45 mm 085167 1.50mm 090764 1000 2000...
  • Page 141 CC20-G Installation Checks General ––––– If permitted by local codes, check that hose connection is flexible to allow oven ––––– Make sure there is no heat source within 12 movement for servicing. inches of louvered right side of oven. Heat Shield PIN 098607 - Single Qty (1)
  • Page 142 CC20-G Sequence Of Events Prior to Serial Number C7243MS Operating Conditions • Pilot burner flame established. • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. Press COMBO key and ON simultaneously. •...
  • Page 143 CC20-G Sequence Of Events Prior to Serial Number C7243MS 7. K11 and K12 de-energized. (High and Low Air) 8. K2 and K3 de-energized. (High Boiler) 9. K14 energized. (Condensate Spray) Combo Mode (Prior to Serial Number C7243MS) Refer to the Combo mode circuit diagram on page 5-17 and/or the schematic diagram on page 5-19 for the following sequence of events.
  • Page 144 CC20-G Sequence Of Events Prior to Serial Number C7243MS 6. K13 de-energized. (Fill) 7. K11 and K12 de-energized. (High and Low Air) 8. K3 de-energized. K2 remains energized. (High and Low Boiler) 9. K14 energized. (Condensate Spray) 10. K11 and K12 energize. 11.
  • Page 145 CC20-G Sequence Of Events Prior to Serial Number C7243MS 5. When water level reaches the low water level probe, relays K2 and K3 energize. Gas valves SV3 and SV4 open. 6. When the water temperature is approximately 150°F, relays K2 and K3 de-energize, and gas valves SV3 and SV4 close.
  • Page 146 CC20-G Sequence Of Events After Serial Number GC7243MS Operating Conditions • Pilot burner flame established. • Oven cavity below 200°F. • Oven door closed. • No service codes displayed in the time display window. Press COMBO key and ON simultaneously. •...
  • Page 147 CC20-G Sequence Of Events After Serial Number GC7243MS 3. K6 energized. (Fan) 4. K12 energized. (Low Air) 5. K11 energized. (High Air) 6. K2 and K3 energized. (Low and High Boiler) 7. K13 de-energized. (Fill) 8. K11 and K12 de-energized. (High and Low Air) 9.
  • Page 148 CC20-G Sequence Of Events After Serial Number GC7243MS Relay Operation Summary 1. K15 and K13 energized. (Drain and Fill) 2. K6 energized. (Fan) 3. K12 energized. (Low Air) 4. K11 energized. (High Air) 5. K2 and K3 energized. (Low and High Boiler) 6.
  • Page 149 CC20-G Sequence Of Events After Serial Number GC7243MS Relay Operation Summary 1. K15 and K13 energized. 2. K6 energized. (Fan) 3. K12 energized. (Low Air) 4. K11 energized. (High Air) 5. K2 and K3 energized. 6. K13 de-energized. 7. K3 de-energized. 8.
  • Page 150 CC20-G Sequence Of Events After Serial Number GC7243MS 14. Relay K15 energizes and drain valve closes. K13 energizes and boiler fill valve opens. Boiler fills. 15. When water reaches low water level probe, relays K2 and K3 energize. Gas valves SV3 and SV4 open. 16.
  • Page 151 CC20-G Operation Prior to Serial Number C7243MS The model CC20-G is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. This gas oven operates from a 115 volt, single-phase, 60 hertz, 15 ampere power source.
  • Page 152 CC20-G Operation After Serial Number GC7243MS The model CC10-G is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. This gas oven operates from a 115 volt, single-phase, 60 hertz, 15 ampere power source.
  • Page 153 CC20-G Electrical Diagrams Prior to Serial Number GC7243MS Pilot Ignition Circuit (Revised 1/02) 5-15 5-15...
  • Page 154 CC20-G Electrical Diagrams Prior to Serial Number GC7243MS Steam Mode Circuit (Revised 1/02) 5-16 5-16...
  • Page 155 CC20-G Electrical Diagrams Prior to Serial Number GC7243MS Combo Mode Circuit (Revised 1/02) 5-17 5-17...
  • Page 156 CC20-G Electrical Diagrams Prior to Serial Number GC7243MS Oven Mode Circuit 5-18 5-18 (Revised 1/02)
  • Page 157 CC20-G Electrical Diagrams Prior to Serial Number GC7243MS Schematic Diagram for CC20-G (Revised 1/02) 5-19 5-19...
  • Page 158 CC20-G Electrical Diagrams After Serial Number GC7243MS Pilot Ignition Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5-20 (Revised 1/02)
  • Page 159 CC20-G Electrical Diagrams After Serial Number GC7243MS Steam Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD (Revised 1/02) 5-21...
  • Page 160 CC20-G Electrical Diagrams After Serial Number GC7243MS Combo Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5-22 (Revised 1/02)
  • Page 161 CC20-G Electrical Diagrams After Serial Number GC7243MS Oven Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD (Revised 1/02) 5-23...
  • Page 162 CC20-G Electrical Diagrams After Serial Number GC7243MS Schematic Diagram for CC20-G GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5-24 (Revised 1/02)
  • Page 163 CC20-G Parts List Part Item Description Qty. Thermostat ........ 071499 Water Probe Harness....090703 Probe, Water ......070178 Fitting......... 071231 Fitting, Male....... 071217 Boiler Temperature Kit, Probe........098418 Boiler Probe Harness ....090704 Air and Drain Probes Harness........090705 Drain Temperature Kit, Probe........
  • Page 164 CC20-G Parts List MOTOR Part Item Description Qty. Bracket Assy ......070100 Motor & Heat Stinger Assy..090760 Key, 1/8" Square 303 S.S..071288 Insulation Retainer Assy ..071228 Insulation Nut Plate ....069770 Motor Seal Assy ...... 071299 •...
  • Page 165 CC20-G Parts List Part Part Item Description Qty. Item Description Qty. Igniter Module......085153 • High Voltage Cable ....090819 Boiler Manifold ....... Main Gas Valve Kit Fig. 4 (Natural Gas) ......098665 Automatic Gas Valve ....085160 Main Gas Valve Rocker Switch (SW1) .....
  • Page 166 CC20-G Parts List Part Item Description Qty. Boiler Manifold Parts Assembly (Natural Gas) ..090784 Jet .......... 085167 Flame Holder ......056965 Manifold........086327 Boiler Manifold Parts Assembly (Propane Gas) ..090785 Jet ........... 085169 Flame Holder ......056965 Manifold........086327 Figure 4.
  • Page 167 CC20-G Parts List Part Item Description Qty. Oven Manifold Parts Assembly (Natural Gas) ..090779 Automatic Gas Valve....085160 Jet ........... 090776 Flame Holder......090775 Oven Manifold Parts Assembly (Propane Gas) ..090780 Automatic Gas Valve....085160 Jet .......... 098671 Flame Holder......

  • Page 168: Right Side Door Switch 1

    CC20-G Parts List Part Item Description Qty. Door Assembly ......Fig. 7 Control Panel Knob ....073430 Shroud with Right Side Rack .. 090789 Right Side Door Switch ... 081620 Middle Rack ......080644 Drip Tray........080772 Left Side Door Switch ..... 081621 Left Chamber Baffle ....
  • Page 169 CC20-G Parts List Part Item Description Qty. Door Assembly ......080645 Handle ........129723 Truss Head Screw S.S.... 005764 Door Front Panel..... 080646 Insulator Board......080658 Hinge ........1 080642A Door Spacer ......8 080654 Gasket ........080640 Inner Panel......080660 Hex Head Cap Screw S.S.
  • Page 170 CC20-G Parts List RELAYS K1-K15 Part Part Item Description Qty. Item Description Qty. Prior to Serial No. GC7243MS Prior to Serial No. GC7243MS Control Panel (Retrofit Kit) ..1 112976 Relay Board (Retrofit Kit) ..112976 Starting at Serial No. GC7243MS Starting at Serial No.
  • Page 171 CC20-G Parts List HI-LIMIT THERMOSTAT Part Item Description Qty. Relay ........074842 Motor Run Capacitor ....090711 Motor Start Capacitor ..... 087942 Motor Relay......087948 Transformer, Pri. 120V, Sec. 24V ......... 087953 Bridge Rectifier......071487 Fuse, 15 Amp, Slo-Blo .... 087946 Fuse Holder ......
  • Page 172 CC20-G Parts List Part Part Item Description Qty. Item Description Qty. Auto Clean Water Valve Drain Tube, 2" Lg ....090742 Harness ......... 090769 Prior to Serial #GC14501 Water Inlet Valve Harness ..090706 Boiler Kit Assembly ....098650 Water Inlet Valve, 2-Way, (Natural and Propane Gash Triple Type ......
  • Page 173 CC20-G Parts List Part Part Item Description Qty. Item Description Qty. Auto Clean Tank ..... 086452 Nipple, 1/2-14NPT X 1-1/2 Screw, 318" Truss Hd ..... 005764 Lg ..........086485 Swing Check Valve....086461 Elbow 900,1 /2-14N PT... 086494 Filler Cap ........ 086468 Plug, 3/8-18NPT .....
  • Page 174 CC20-G Parts List BOILER TOP CAVITY FROM WATER VALVE BOILER BOTTOM CAVITY FROM WATER VALVE Part Part Item Description Qty. Item Description Qty. Auto Clean Tank ..... 086452 Swing Check Valve, 0-Ring, 1-3/8 X 2 X 3/16..092102 1 /2-14N PT......086461 Screw, 3/8"...
  • Page 175 C/2-G Specifications Oven Electrical Specifications 115 Volts AC, 60 Hertz, 1-Phase,15 Amps. Gas Supply Requirement 5.5" W.C. (min) to 14" W.C. (max) for natural gas. 4.5" W.C. manifold pressure. 12" W.C. (min) to 28" W.C. (max) for propane gas. 10.3" W.C. manifold pressure.
  • Page 176 C/2-G Orifice Size Charts ORIFICE SIZE CHART NATURAL GAS Installation Site Oven Boiler Oven Runner Arm Altitude Part No. Drill Size Part No. Drill Size Part No. Drill Size (feet) Zero or at Sea Level 090776 1.45 mm 085167 1.50mm 090764 1000 2000...
  • Page 177 C/2-G Sequence Of Events Oven Mode 1. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve opens. Boiler water fill begins. 2. Relay K6 energizes. Fan motor turns on. 3. Relay K12 energizes allowing gas valve SV2 to open. Pilot runner tube opens. 4.
  • Page 178 C/2-G Sequence Of Events Combo Mode 1. Relays K13 and K5 energized. Boiler drain valve closes and boiler fill valve opens. 2. Relay K6 energizes. Fan motor turns on. 3. Relay K12 energizes allowing gas valve SV2 to open. Pilot runner tube opens. 4.
  • Page 179 C/2-G Sequence Of Events 11. K14 energizes. 12. K11 and K12 de-energize. Oven/Meat Probe/Hold Mode 1. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve opens. Boiler water fill begins. 2. Relay K6 energizes. Fan motor turns on. 3.
  • Page 180 C/2-G Sequence Of Events 8. K2 remains energized. 9. K2 de-energized. 10. K11 and K12 de-energized. 11. K6 energized and de-energized. (cycles) 12. K12 energized. 13. K11 energized. Combo/Meat Probe/Hold Mode 1. Relays K13 and K15 energized. Boiler drain valve closes and boiler fill valve opens.
  • Page 181 C/2-G Sequence Of Events Relay Operation Summary 1. K13 and K15 energized. 2. K6 energized. 3. K12 energized. 4. K11 energized. 5. K2 and K3 energized. 6. Relay K13 energized. 7. K11 and K12 de-energized. 8. K3 de-energized and K2 remains energized. 9.

  • Page 182: Cook Only,

    C/2-G Operation The model C/2-G is a combination steamer-oven with a stainless steel cooking chamber, a steam generator, and electronic circuitry for controlling unit operation. This C/2-G oven operates from a 115 volt, single-phase, 60 hertz, 15 ampere power supply. The gas supply can be natural gas or propane gas. Supply pressure must be in accordance with the specifications outlined earlier in this section.

  • Page 183: Relay Board

    C/2-G Electrical Diagrams Pilot Ignition Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5A-9...
  • Page 184 C/2-G Electrical Diagrams Steam Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5A-10...
  • Page 185 C/2-G Electrical Diagrams Combo Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5A-11...
  • Page 186 C/2-G Electrical Diagrams Oven Mode Circuit GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5A-12...
  • Page 187 C/2-G Electrical Diagrams Schematic Diagram for C/2-G GRAY 1.25 AMP 1.25 AMP RELAY BOARD 5A-13...
  • Page 188 C/2-G Parts List Part 5A-8 Item Description Qty. Igniter Module ......085153 Boiler Manifold ......See Fig. 4, page 5-28 Oven Burner Manifold ..... See Fig. 5, page 5-29 Automatic Gas Valve....0851160 Rocker Switch ......087951 Pilot Runner Tube Natural Gas ........
  • Page 189 C/2-G Parts List Part Item Description Qty. Door Assembly ......Fig. Control Panel Knob ....073430 Shroud with Right Side Rack .. 090789 Right Side Door Switch ... 081620 Middle Rack ......080644 Drip Tray........080772 Left Side Door Switch ..... 081621 Left Chamber Baffle ....
  • Page 190 C/2-G Parts List 31 32 33 28 29 30 129727 Figure 3. Glass Door 5A-16...
  • Page 191 C/2-G Parts List Part Item Description Qty. Assembly, Door Front Panel ... 133847 Screw, 10-32 x .375 Phillips Flat Head ......069723 Handle ........129723 Spacer, Cam ......123744 Assembly, Cam ....... 074252 Screw, 8-32 x 1.00 Phillips Torx Head Locking ....123718 Screw, 8-32 x .375 Phillips Torx Head Locking ....
  • Page 192 C/2-G Parts List 138658 Figure 4. Solid Door 5A-18 5A-18...
  • Page 193 C/2-G Parts List Part Item Description Qty. Weldment, Door Front Panel .. 136054 Screw, #10-32 x .375 Phillips Flat Head ......069723 Handle ........129723 Spacer, Cam ......123744 Assembly, Cam ....... 074252 Screw, #8-32 x 1.00 Phillips Torx Head Locking ....123710 Screw, #8-32 x .375 Phillips Torx Head Locking ....
  • Page 194 C/2-G Parts List Part Part Item Description Qty. Item Description Qty. Control Panel (Cook Only) ..1 124808 Relay Board ......112964 Control Panel (Cook, Hold and Control Panel Knob ....073430 Probe) ........1 124309 Voltage Plug ......109334 EPROM (Cook Only;...

  • Page 195: Transformer 1

    C/2-G Parts List 5A-13 Part Item Description Qty. Capacitor, 35 MFD with Resistor........ 087942 Capacitor, 35 MFD ....090711 Terminal Boot for Capacitors... 087945 Relay, SPDT......074842 Motor Start Relay ....087948 Transformer, 120 v primary/ 24 v secondary ....087953 Bridge Rectifier......
  • Page 196 SERVICE CODES Introduction The combination ovens are designed to diagnose system faults by dis- playing single or combination service codes in the Time and Cook Temperature windows. During a reset procedure, the customer will first notice the service light and buzzer. When A Customer Calls When a customer calls for service, ask if any service codes appeared in the Time display window.
  • Page 197 SERVICE CODES How To Troubleshoot A Service Code The solid state, self-diagnostic program utilizes nine service codes to assist you in troubleshooting: Code Indication - Old Electronics (Prior to Serial # C7439MS and GC7243MS) Low water level probe circuit problem High water level probe circuit problem Boiler fill time exceeded Air temperature probe circuit problem...
  • Page 198 SERVICE CODES COOL - This service message will be displayed during Fast Cool operation as described in the Operating Manual. Prior to Serial Number GC7243MS and C7439MS 041990 A - This message will be displayed in the Time display window and in b - the Temperature display window.

  • Page 199: Cook Only

    NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electron- ics) SERVICE CALL: Part Number (P/N 074821) with you on the Description CC10-E CC20-E CC10-G CC20-G Water Level Probe (Qty. 2) 070178 070178 070178 070178 Water Level Probe Harness...
  • Page 200 SERVICE CODES (Old Electronics) Service Codes 1 and 2 Prior to Serial Number GC7243MS and C7439MS Table A provides information for troubleshooting when on a service call. The columns list probable causes, replacement parts and special tools needed, and a page reference to service instructions.

  • Page 201: Cook And Hold

    30-seconds. PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Only use Groen Certified Parts. Part Number Description CC10-E CC20-E CC10-G CC20-G Water Level Probe (Qty.
  • Page 202 SERVICE CODES Service Code 1 Table 1 provides information for troubleshooting when on a service call. The columns list probable causes, replacement parts and special tools needed, and a page reference to service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 203: Top, Cook And Hold 1

    30-seconds. PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Only use Groen Certified Parts. Part Number Description CC10-E CC20-E CC10-G CC20-G Water Level Probe (Qty.
  • Page 204 SERVICE CODES Service Code 2 Table 2 provides information for troubleshooting when on a service call. The columns list probable causes, replacement parts and special tools needed, and a page reference to service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 205: Single Oven

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 206 Page 2-17 be blown. necessary. Fuse F4 and/or F7 for Replace a blown fuse. Digital ohmmeter Page 3-25 CC20-E may be blown. Relay K13 may be open. Replace relay board. ———————— Page 8-20 Relay K9 on double- Replace relay board.
  • Page 207 SERVICE CODES Service Code 3 Table 3 - Troubleshooting Service Code 3 - Continued Service Reference Probable Cause Corrective Action Test Equipment Location Relay board and/or Perform relay board power Voltmeter Page 8-3 control panel supply check. operation. Relay board may be Replace relay board or flex cable.

  • Page 208: Eprom (

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 209 SERVICE CODES Service Code 4 Table 4 provides information for troubleshooting when on a service call. The columns list probable cause, replacement parts and special tools needed, and a page reference to the service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 210: Single Oven

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 211 SERVICE CODES Service Code 5 (Old Electronics Only) Prior to Serial Number GC7243MS Table 5 provides information for troubleshooting when on a service call. The columns list probable cause, replacement parts and special tools needed, and a page reference to the service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 212: Single Oven

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 213 SERVICE CODES Service Code 6 Table 6 provides information for troubleshooting when on a service call. The columns list probable cause, replacement parts and special tools needed, and a page reference to the service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 214: Single Oven

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 215 SERVICE CODES Service Code 7 Table 7 provides information for troubleshooting when on a service call. The columns list probable cause, replacement parts and special tools needed, and a page reference to the service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 216: Single Oven

    SERVICE? PARTS TO TAKE ON NOTICE: Be sure to take the Service Manual and the T-Cal Box (old electronics) SERVICE CALL: (P/N 074821) with you on the service call. Use only Groen Certified parts. Part Number Description CC10-E CC20-E CC10-G...
  • Page 217 SERVICE CODES Service Code 8 Table 8 provides information for troubleshooting when on a service call. The columns list probable cause, replacement parts and special tools needed, and a page reference to the service instructions. Proceed through the Probable Causes in the sequence shown in the table.

  • Page 218: Single Oven

    Yes. Oven mode only. The oven requires at least one good water level probe OPERATED BEFORE to operate in STEAM or COMBO mode. SERVICE? PARTS TO TAKE ON NOTICE: Only use Groen Certified Parts. SERVICE CALL: Part Number Description CC10-E...
  • Page 219 SERVICE CODES Service Code 9 After Serial Number GC7243MS and C7439MS Table A provides information for troubleshooting when on a service call. The columns list probable causes, replacement parts and special tools needed, and a page reference to service instructions. Proceed through the Probable Causes in the sequence shown in the table.
  • Page 220 Diagnostic Mode COMBO DIAGNOSTIC MODE After Serial Numbers C7439MS and GC7243MS Operating Instructions The control panel has a built-in diagnostic tool for troubleshooting the oven. DO NOT replace a control panel or relay board without running the diag- nostic program. If the diagnostic test functions normally, the control system is working.
  • Page 221 Diagnostic Mode LOW WATER PROBE Turn the Cook Temperature Knob one click clockwise to check the Low Water Probe. LO P appears in the TEMPERATURE display window. 117 (or more) appear in the TIME display window, if the probe is open. Short out the probe to show the water level count.
  • Page 222 TROUBLESHOOTING General Some of the more common problems that could occur are listed in this section. All possible problems, of course, could not be included. Differences in procedures between the electric and gas units are noted. This “non-warranty” symbol is used throughout the troubleshooting section to tell you which corrective actions not be covered by the equipment...

  • Page 223: Single Oven

    In addition to the parts listed in the chart below, be sure you take this Service Manual and the T-Cal box (P/N 074821) with you on the service call. Use only Groen Certified Replacement Parts. Part Number CC10-E CC20-E CC10-G...

  • Page 224: Troubleshooting Procedures

    TROUBLESHOOTING Troubleshooting Procedures After determining the problem condition, proceed through the Probable Causes and corresponding Corrective Actions in the order shown in the troubleshooting table. If a Probable Cause is not the reason for the fault condition, proceed to the next Probable Cause and Corrective action. Continue through the Probable Causes until the problem is corrected.
  • Page 225 TROUBLESHOOTING PROBLEM: UNIT WILL NOT TURN ON - (Continued) Probable Cause Corrective Action Electric Ovens WARNING When oven power is turned on, there is high voltage present in the electrical components compartment. Relay board or control panel not Turn on oven power and perform power supply check. operating properly.
  • Page 226 TROUBLESHOOTING PROBLEM: UNIT WILL NOT TURN ON - (Continued) Probable Cause Corrective Action 24VAC measured. Turn off oven power. Pilot burner not ignited. (Continued) • Check for pilot burner orifice blockage. Clean and repair if necessary. • Replace main gas valve MGV1. See page 8-54. WARNING Be sure oven is disconnected from power branch circuit power before performing any...
  • Page 227 TROUBLESHOOTING PROBLEM: UNIT WILL NOT TURN ON - (Continued) Probable Cause Corrective Action Pilot ignited but control panel Turn on oven power and check for 115VAC at the relay will not turn on. will not turn on. board power input terminals. See schematic diagram on page 4-19 or 5-19.

  • Page 228: Terminal Block 1

    WARNING There is high voltage present when oven power is turned on. CC20-E - Fan rotation reversed. Turn on oven and observe fan rotation. Fan should be turning in a counterclockwise direction. If in a clockwise direction, turn off oven power and disconnect oven from power source.
  • Page 229 TROUBLESHOOTING PROBLEM: OVEN TURNS OFF DURING OPERATION - (Continued) Probable Cause Corrective Action Gas Ovens Gas supply turned off or interrupted. Close gas supply line and check for cause of gas supply loss. Correct problem or have problem corrected. Air in supply line or blockage. Check supply line.
  • Page 230 TROUBLESHOOTING PROBLEM: OVEN TURNS OFF DURING OPERATION - (Continued) Probable Cause Corrective Action Pilot burner not ignited. (Continued) 24VAC not measured. Turn off oven power and replace igniter module. See page 8-51. WARNING When oven power is turned on, there is high voltage present in the electrical components compartment.
  • Page 231 TROUBLESHOOTING PROBLEM: OVEN TURNS OFF DURING OPERATION - (Continued) Probable Cause Corrective Action Coil Check Pilot ignited but control panel will not turn on. (Continued) If 115VAC is not measured, refer to schematic diagram (page 4-19 or 5-19), disconnect oven from branch circuit, and continuity check wiring.
  • Page 232 See page 8-15. If harness is okay, replace the boiler temperature probe using boiler temperature probe kit, P/N: CC10-E and CC20-E – 083416 CC10-G and CC20-G – 085187 Dirt holds drain valve open. Check for blockage and clean drain valve tube if necessary.
  • Page 233 TROUBLESHOOTING PROBLEM: OVEN DOES NOT ACHIEVE READY STATUS - (Continued) Probable Cause Corrective Action Electric Ovens WARNING When oven power is turned on, there is high voltage present in the electrical components compartment. Turn on oven power and drain boiler. Begin operation in Water heating element circuit.
  • Page 234 Corrective Action Zero current in any water heating Replace the relay board. element circuit. (Continued) CC20-E Zero current in any water heating Be sure oven power is off and oven is disconnected from element circuit. the power source. Disconnect heating element from har- ness and continuity check element.
  • Page 235 TROUBLESHOOTING PROBLEM: OVEN DOES NOT ACHIEVE READY STATUS - (Continued) Probable Cause Corrective Action 24VAC measured. Coil is open, replace faulty mercury Zero current in any water heating element circuit. (Continued) relay, P/N: R1 - 077848 R2, R3, R11, R12 - 077834 R4 - 077849...
  • Page 236 TROUBLESHOOTING PROBLEM: OVEN DOES NOT ACHIEVE READY STATUS - (Continued) Probable Cause Corrective Action Low boiler valve SV3 and/or high boiler valve 115VAC not measured. K2 or K3 on relay board could be SV4 not operating properly. (Continued) defective. Replace the relay board. Relay board and/or control panel not operating Perform relay board power supply check.
  • Page 237 TROUBLESHOOTING PROBLEM: OVEN DOES NOT ACHIEVE READY STATUS - (Continued) Probable Cause Corrective Action Continuity measured. Check burner orifices for blockage. Air burner valve SV1 and/or lighter arm valve not operating properly. (Continued) Clean or replace if necessary. Open circuit measured. Replace boiler valve SV1 and/or SV2.

  • Page 238: Hose Clamp,

    TROUBLESHOOTING PROBLEM: WATER LEAKS Probable Cause Corrective Action WARNING Be sure oven is disconnected from branch cir- cuit power before performing any repair work. Leaks around water inlet valve. Replace garden hose gasket. See page 8-25. Tighten hose clamp, but do not overtighten. Replace a damaged hose.

  • Page 239: Spray Nozzle 1

    TROUBLESHOOTING PROBLEM: IMPROPER CONDENSATE SPRAY OPERATION - (Continued) Probable Cause Corrective Action Voltage measured. Replace the relay board. No condensate spray. (Continued) Voltage not measured between K14 contacts. Continuity check harness. Replace defective wire and/or wire termi- nal. Too much spray. Inspect spray nozzle for damage or wear, and replace nozzle if necessary.
  • Page 240 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE Probable Cause Corrective Action Door may be open. Close the oven door. No mode has been selected. Make sure oven is in an operating mode. Door switch may be an open Test door switch. See page 8-5. circuit.
  • Page 241 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE - (Continued) Probable Cause Corrective Action Motor start relay for 1/6 HP, 1700 RPM Measure starting current through red wire. Be sure motor split phase motor. is cool. Then close oven door. Starting current should be approximately 7.0 amps peak dropping to o amps after 1.5 seconds.
  • Page 242 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE - (Continued) Probable Cause Corrective Action CC20-E (Three-Phase Motor) 208 and 240 Volt Units WARNING When oven power is turned on, there is high voltage present in the electrical components compartment. Relays K6, K7, and/or K8 may not Check voltage between K6, K7, and K8 be operating properly.
  • Page 243 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE - (Continued) Probable Cause Corrective Action Relay K6 on relay board may not Check for 24VAC between K6 contacts. be operating properly. WARNING Be sure oven is disconnected from branch circuit power before performing any repair work.
  • Page 244 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE - (Continued) Probable Cause Corrective Action WARNING Relay K6 on relay board may not be operating properly. (Continued) Be sure oven is disconnected from branch circuit power before performing any repair work. Open circuit measured. Replace the relay board. Coil has continuity.
  • Page 245 TROUBLESHOOTING PROBLEM: FAN MOTOR DOES NOT OPERATE - (Continued) Probable Cause Corrective Action Relay board or control panel problem. Perform relay board power supply check. See page 8-3. Motor may be defective. Replace motor. See the “Maintenance” section (page 8- 41) for motor repair instructions.
  • Page 246 Maintenance Control Panel Calibration Check (Only Required On Old Electronics) This procedure is not required on electronics after serial # CC10E & CC20E C7439MS CC10G & CC20G GC7243MS General NOTE: May only have two wires. If Service Code 7 indicates that the solid state controls are out of calibration. A so, connect to the air control panel calibration check is important to ensure accurate operation at probe pins.
  • Page 247 Maintenance Control Panel Calibration Check Calibration Check (continued) 11. Set the calibration box dial at 100°F. When the temperature displayed in the Time window equals the calibration box setting, press the timer START touch pad. C 150 will be displayed in the Time window. IMPORTANT Correct calibration requires that the oven be calibrated in 50-degree increments between 100°F and 600°F.
  • Page 248 500 ±5.0 ohms for all probes except the CC10-E and C7439MS. CC20-E drain* probe. The resistance of this probe should read 568 ±5.0 ohms @ 32°F. If meter reading is not within this specification, replace the probe.
  • Page 249 2. Check if electrical leads to the thermostats are identified. If identification is missing, correctly mark the wires before disconnecting them. See control schematic in Sections CC10E, CC20-E, CC10-G, and CC20-G. 3. Disconnect electrical leads from the high limit thermostats (TC1 and TC2 for electric units, TC1 for the gas units.)

  • Page 250: Door Switch

    Maintenance Test and Adjustments Drain Valve (continued) 7. Clean and install the valve. Repeat steps 1 through 4. If valve still does not operate correctly, and there are no problems with K15 relay operation and the drain line, disconnect the oven from the branch circuit and replace the drain valve.
  • Page 251 IMPORTANT The water inlet valve for the CC10-E, CC20-E, and older CC10-G units has two solenoids: one for boiler fill and one for condensate spray. The CC10-G and CC20-G units, with auto clean, have a water fill valve with three solenoids: one for boiler fill, one for condensate spray, and one for the cleaning cycle.
  • Page 252 Maintenance Test and Adjustments Condensate Spray Solenoid (continued) 2. Check for 24VAC between fill valve solenoid terminals WV3 and WV4. Refer to the schematic diagrams in sections CC10-E, CC20E, CC10-G, and CC20-G. 3A. If there is 24 VAC measured across terminals WV3 and WV4, replace the water inlet valve (see page 8-27).
  • Page 253 See page 8-45 for air heating element replacement. CC20-E: Be sure to measure single heater power. Using a clampon ammeter, measure current in the following wire pairs: A1 - A2 (heater AH1)
  • Page 254 If zero (0) amps is measured in any of these wire pairs, the associated water heating element must be replaced. See page 8-49 for the replacement procedure. CC20-E: Using a clamp-on ammeter, measure current in the following wire pairs: B1 - B2 (water heater BH1)
  • Page 255 Maintenance Test and Adjustments Pilot Flame Current Check - Gas Units (continued) 4. Ignite the pilot. The microammeter should read 3 microamps minimum. • If current reading is incorrect, replace the igniter module (see page 8-51). • If current reading is below 3 microamps, continuity check the flame rectification circuit (large orange wire, spark electrode, pilot burner hood, and ground connections).
  • Page 256 Maintenance Programming Altitude of Operation The altitude of operation can be programmed into the Convection Combo. At altitudes above 5,000 feet, the unit will not operate in Steamer or Combo Mode unless the altitude is set. To set the altitude: 1.
  • Page 257 Maintenance Replacement Procedures Water Level Probe Removal WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. Turn off oven power and disconnect oven from the branch circuit. 2. Remove right side cover from oven. 3.
  • Page 258 Maintenance Replacement Procedures AIR TEMPERATURE PROBE Removal WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. Turnoff oven power and disconnect oven from the branch circuit. NOTICE An incorrectly installed air temperature probe MUST be replaced. Operating the oven with a bent air temperature probe will result in improper oven operation.
  • Page 259 Maintenance Replacement Procedures Air Temperature Probe Installation (continued) 2. If a new guard assembly is being installed, install guard assembly, temperature probe fitting, fiber washer, stainless steel washer, and nut as shown in the above illustration. 3. Install a NEW compression nut and air temperature probe. Be careful not to bend the probe as you insert it through the oven wall and on through both ends of the mounting bracket.
  • Page 260 If probe is bent and not correctly installed, it must be replaced. 3. Remove right hand side panel. 4. On the CC20-E unit, disconnect probe ground wire from relay board mounting bracket. 5. Disconnect boiler temperature probe electrical leads from the control panel.
  • Page 261 Maintenance Replacement Procedures Boiler Temperature Probe installation (continued) 6. Connect oven to the branch circuit. 7. Turn on oven power and perform the following reset procedure: a) Turn off oven power by pressing the ON touch pad. b) While pressing the COMBO touch pad, press the ON touch pad. If no errors are found, the unit will beep and show four zeros in the Time display window.
  • Page 262 Maintenance Replacement Procedures Installation - Gas Units WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. If male fitting was removed with the probe assembly, install it in the oven at this time and securely tighten it. 2.
  • Page 263 Maintenance Replacement Procedures Drain Temperature Probe (Old Electronics Only) Prior to Serial Numbers GC7243MS and C7439MS Removal WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. Turn off oven power and disconnect oven from the branch circuit. NOTICE An incorrectly installed drain temperature probe MUST be replaced.
  • Page 264 Maintenance Replacement Procedures Drain Temperature Probe Installation (continued) 5. Connect oven to the branch circuit. 6. Turn on oven power and perform the following reset procedure: a) Turn off oven power by pressing the ON touch pad. b) While pressing the COMBO touch pad, press the ON touch pad. If no errors are found, the unit will beep and show four zeros in the Time display window.
  • Page 265 Maintenance Replacement Procedures Control Panel - After serial numbers GC7243MS-gas, and C7439MS-electric Removal WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. Turn off oven power and disconnect oven from the branch circuit. 2.

  • Page 266: Long 1

    Maintenance Replacement Procedures Relay Board - After serial numbers GC7243MS-gas, and IMPORTANT C7439MS-electric This illustration shows the relay Removal board electric ovens. WARNING However, the relay board used in the gas ovens is similar. Be sure oven is disconnected from branch circuit power before performing any repair work.
  • Page 267 1. Make sure that the new control panel is the correct one for the oven being serviced. Control Panel Part Number Data CC10-E (single ovens and all CC20-E ovens Cook only - 077808 Cook and Hold option - 077809 CC10-E (double-stacked ovens)
  • Page 268 Maintenance Replacement Procedures Relay Board - Prior to serial number GC7243MS-gas, and C7439MS-electric IMPORTANT Removal This illustration shows the relay board for the electric ovens. However, the relay board used in the gas ovens is WARNING similar. Be sure oven is disconnected from branch circuit power before performing any repair work.
  • Page 269 Maintenance Replacement Procedures Relay Board Installation (continued) 6. Correctly connect leads 11131 (5) and RB2 (6). 7. Connect door switch leads to terminals (3 and 4). 8. Connect relay board harness (2) to control panel. 9. Check for continuity to ground at ground pad (11). 10.
  • Page 270 Maintenance Replacement Procedures High Limit Thermostats Removal WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. 1. Turn off oven power and disconnect oven from the branch circuit. 2. Remove back cover and right side panel. 3.

  • Page 271: Hose Clamp

    Removal IMPORTANT The water inlet valve for the CC10-E, CC20-E, and older CC10-G units has two solenoids, one for the boiler fill and one for the condensate spray. The CC10-G and CC20-G, with auto clean, have a water inlet valve with three solenoids, one each for the boiler fill, condensate spray, and cleaning cycle.
  • Page 272 7. Allow oven to reach Ready status, then set timer for 5-minutes. This turns on the condensate spray. Again check for leaks. 8. If there is no leakage, install back cover and right side cover (CC10-E, CC20-E, and CC10-G). Dual Water Valve Installation CC20E and CC20G Glass Door and Solid Door Gasket...

  • Page 273: Assembly

    1. Turn off oven power and disconnect oven from the branch circuit. 2. For the CC10-E, CC20-E, and CC20-G units, remove back cover. For the CC10-G remove the right side cover. 3. Loosen hose clamps and disconnect both ends of drain hose.
  • Page 274 Maintenance Replacement Procedures Door Removal 1. Turn off oven power. 2. Allow oven to cool. 3. Remove door using one of the following two methods: • Support weight of the door and remove hinge pin. • Support weight of the door and remove the door-to-hinge bolts. 4.
  • Page 275 Maintenance Replacement Procedures Door Reversing Procedure 1. Turn off oven power. 2. Allow oven to cool. 3. Support door, unplug the door light cable (Models C/2-E and C/2-G), remove hinge-to-oven bolts, and remove door. 4. Place door, with hinge, on a flat, clean table or similar support, with gasket facing up, or the inner glass door facing up (Models C/2-E and C/2-G).
  • Page 276 Maintenance Replacement Procedures Door Reversing Procedure (continued) 18. Close oven door and operate oven in the Steam mode. If oven fan does not operate, check location of door magnet and try Steam mode operation again. If fan operation problem still exists, refer to the Troubleshooting section of this manual.

  • Page 277: Door Gasket

    Maintenance Replacement Procedures All CC10E and CC10G Models CC20E and CC20G Door Gasket Removal 1. Turn off oven power. 2. Allow oven to cool. 3. Remove the door using one of the two following methods: • Support weight of the door and remove hinge pin. •...
  • Page 278 Maintenance Replacement Procedures Door Handle and Door Cam 1. Turn off oven power. 2. Allow oven to cool. 3. Remove screws (1) and U-channel (2) from the door. 4. Remove screws (3), door handle (4), and cam (5). Installation 1. Apply a high temperature (1800°F) anti-seize and lubricating compound to the door cam (5) and Loctite 242 to screw (3) threads.
  • Page 279 CC10-E and CC10-G 4. Carefully remove retaining ring from one end of spring support pin, then remove pin. 5. Remove spring nut and spring. CC20-E and CC20-G 4. Remove nut and spring support plate. 5. Remove spring. Installation CC10-E and CC10-G 1.
  • Page 280 Maintenance Replacement Procedures Door Pin (Bullet) 1. Turn off oven power. 2. Allow oven to cool. 3. Note and record distance between jam nut and end of bullet. This information will be needed in step 6. 4. Loosen jam nut, then remove door bullet and jam nut. 5.

  • Page 281: Door Switches

    8. Pull front cover to the right to expose door switch. If oven is mounted on a table, you may have to break the silicone seal. CC20-E, CC10-G, and CC20-G 1. Turn off oven power and disconnect oven from the branch circuit.
  • Page 282 10. Operate oven in Oven mode. Open and close the door. Oven should operate only when the door is closed. CC20-E, CC10-G, and CC20-G 1. Connect ohmmeter leads to door switch terminals, and hold switch approximately one inch from oven door magnet. Switch should close at this distance as indicated by a short circuit reading on the meter.
  • Page 283 6. Fold excess wire into a bundle and wrap with tape. 7. Install L-cover (CC10-E) or left side cover (CC10-G and CC20G). For the CC20-E unit, install panel (with door switch), bullet, and two screws. Adjust bullet (see page 8-36).
  • Page 284 Maintenance Replacement Procedures EMI Kit Installation WARNING Turn off and disconnect all power prior to beginning installation. Failure to do so could result in serious injury or death. 1. Turn off the oven and disconnect the power at its source. Remove the side panel from the Combo Oven.
  • Page 285 Maintenance Replacement Procedures Fan and Motor 1. Capscrew 7. Screw (qty. 3) 2. Lockwasher 8. Fiber Washer (qty. 3) 3. Washer 9. Retainer Assembly 4. Fan 10. Washer 5. Square Key 11. Packing 6. Motor and Heat Stinger 12. Seal Housing Assembly Fan and Motor Installation (Revised 1/02)
  • Page 286 6A. Fans With Knobs On The End of The Hub: New CC10-E and CC20-E. CC10-G and CC20-G Use a suitable wheel puller, a three jaw style puller with a 3/8"-16 screw.
  • Page 287 Maintenance Replacement Procedures Fan and Motor Installation (continued) MOTOR 4. Install seal housing (12), new packing (11), washer (10) and retainer assembly (9). 5. Install fiber washers (8) and screws (7). Do not tighten screws at this time. 6. Align motor shaft with center of seal housing (12), and install motor and slinger assembly (6).
  • Page 288 Maintenance Replacement Procedures Mercury Relays (CC20-E Unit Only) WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. Removal 1. Turn off oven power and disconnect oven from the branch circuit. 2. Remove right side cover.
  • Page 289 Use a 3/4 inch deep socket, 1/2 inch drive. 6. Remove heater from oven chamber. CC20-E (Prior to Serial No. C10129MC) 1. Turn off oven power and disconnect oven from the branch circuit. 2. Remove back panel.
  • Page 290 Maintenance Replacement Procedures Air Heating Element (Electric Units Only) Removal (continued) 4. Remove control panel. See page 8-21. 5. Remove relay board and transformer assembly mounting screws and place assembly to the side just far enough to allow access to the air heater element mounting hardware.
  • Page 291 NOTICE Be careful you don’t bend the air heater element during installation. Remove old gasket material. CC20-E (Prior to Serial No. C10129MC) 1. Apply a light coat of anti-seize lubricant to the heater element threads. Install heater. 2. Install heater element bracket.
  • Page 292 Replacement Procedures Air Heating Element (Electric Units Only) Installation (continued) CC20-E (Starting with Serial No. C10129MC) NOTICE Be careful you don’t bend the air heater element during installation. Remove old gasket material. 1. Apply a light coat of anti-seize lubricant to the heater element threads. Install heater;...
  • Page 293 2. Remove right side cover. CC10-E 3. Disconnect electrical wires from heater element being replaced. Remove boiler baffle plate. CC20-E 3. Disconnect wires, for heater element being replaced, from the terminal block. 4. Remove the center and right side racks, and boiler cover. CC10-E 5.
  • Page 294 Replacement Procedures Boiler Heating Element (Electric units Only) Installation (continued) CC20-E 4. Connect heater element wires to the terminal block. 5. Install boiler cover, and the right side and center racks. WARNING When oven power is turned on, there is high voltage present in the electrical components compartment.
  • Page 295 Maintenance Replacement Procedures Igniter Module WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. Removal 1. Turn off oven power and disconnect oven from the branch circuit. 2. Remove right side cover. 3. Disconnect electrical wires from igniter module. If wire identification is not legible, label the wires before disconnecting them.
  • Page 296 Maintenance Replacement Procedures Boiler Manifold WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. Removal 1. Turn off main gas supply. Turn off oven power and disconnect oven from the branch circuit. 2. Remove right side cover. 3.
  • Page 297 Maintenance Replacement Procedures Pilot Burner WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. Removal 1. Turn off main gas supply. Turn off oven power and disconnect oven from the branch circuit. 2. Remove right side cover. 3.
  • Page 298 Maintenance Replacement Procedures Main Gas Valve WARNING Be sure oven is disconnected from branch circuit power before performing any repair work. WARNING Be sure to close the gas supply line to the oven and place the main gas valve switch in the OFF position, before removing the main gas valve Removal 1.

  • Page 299: Bracket Assembly 1

    Maintenance Replacement Procedures Main Gas Valve Removal (continued) 12. Remove main gas valve from its mounting bracket. 13. Remove SV2, SV3, and SV4 from main gas valve. 14. Remove face bushing from old main gas valve. Remove pipe plug from new main gas valve and install face bushing from old main gas valve in its place.
  • Page 300 Maintenance Replacement Procedures Oven Manifold Removal 1. Turn off main gas supply. Remove main gas valve. See page 8-54. 2. Disconnect electrical leads from oven manifold valve. 3. Remove oven manifold. 4. Replace flame holders and/or jets if necessary. 5. If necessary, replace oven manifold valve. Installation 1.
  • Page 301 Maintenance Replacement Procedures Pilot Runner Tube Removal 1. Remove oven manifold (see page 8-56). 2. Remove pilot burner (see page 8-53). 3. Remove oven manifold baffle. 4. Remove four clamps; then remove pilot runner tube. Installation 1. Install pilot runner tube and the four attaching clamps. 2.
  • Page 302 Maintenance Replacement Procedures Boiler Replacement The following instructions are applicable for CC10-G and CC20-G ovens. Single Units and Top Boiler on Double Stacked Units Removal WARNING Be sure oven is disconnected from the branch circuit before performing any repair work. Be sure to close the gas supply line to the oven and place the main gas valve switch in the OFF position, before disconnecting the gas supply line.

  • Page 303: Back Cover 1

    Maintenance Replacement Procedures Boiler Replacement (continued) Installation 1. Install new boiler in the reverse order of removal (steps 13 through 2. Be sure drain line is connected correctly. See page 4-1 or 5-1. 3. Reinsulate new boiler. 4. Start oven. Refer to Operator’s Manual. Check that pilot is operating properly.
  • Page 304 Maintenance Replacement Procedures Bottom Boiler on Double Stacked Units [(2)CC10-G and (2)CC20-G] Removal (continued) 5. Shut off oven water supply. 6. Remove two rear, top base-to-bottom, 1/4-20 mounting screws. These screws are located in the right and left rear corners of the top base.
  • Page 305 Maintenance Replacement Procedures Installation 1. Install new boiler in reverse order of removal (steps 18 through 1). 2. Be sure drain line is connected correctly. See page 4-1 or 5-1. 3. Reinsulate new boiler and replace insulation on top of bottom flue. 4.
  • Page 306 Remove pressure regulator and regulator gasket from the main gas valve. NOTICE Contact Groen to obtain the correct gas pressure regulator and regulator gasket. 3. Remove the oven manifold (see page 8-56). At step 4, remove the flame holders and jets. Install correct size oven jets as specified on page 4-2 or 5-2 and replace the flame holders.
  • Page 307 Maintenance Cleaning System Components Removal 1. Turn off oven power. 2. Remove front clamp from auto clean tank (1). 3. Remove tank cap. 4. Pull front of tank through table, then remove tank rear hanger (2). 5. Remove tank from oven. 6.
  • Page 308 Maintenance Cleaning System Components 8-64 (Revised 1/02)

  • Page 309: Daily Cleaning Instructions

    Maintenance Daily Cleaning Instructions CC10-E and CC20-E General Cleaning should be done daily to help ensure proper operation. It makes the cleanup process faster too! ALWAYS USE HOT PADS WHEN HANDLING HOT OVEN PANELS OR RACKS. DO NOT REMOVE RIGHT SIDE PANEL UNTIL THE FAN HAS STOPPED.
  • Page 310 Maintenance Daily Cleaning Instructions CC10-G and CC20-G Units With Top Mounted Deliming Port General Cleaning should be done daily to help ensure proper operation. It makes the cleanup process faster too! ALWAYS USE HOT PADS WHEN HANDLING HOT OVEN PANELS OR RACKS. DO NOT REMOVE INNER PANELS UNTIL THE FAN HAS STOPPED.
  • Page 311 Maintenance Daily Cleaning Instructions CC10-G and CC20-G Units With Table Mounted Deliming Port General Cleaning should be done daily to help ensure proper operation. It makes the cleanup process faster too! ALWAYS USE HOT PADS WHEN HANDLING HOT OVEN PANELS OR RACKS. DO NOT REMOVE INNER PANELS UNTIL THE FAN HAS STOPPED.
  • Page 312 Maintenance Cleaning System Components Clean Cycle Counter The control panel tabulates the number of times the combo oven has been cleaned: 1. If the unit is on, turn it off by pressing the ON touch pad. 2. Press and hold the ZERO, “0”, touch pad button while turning the unit on by pressing the ON touch pad.

  • Page 313: Handle

    INDEX Active Circuit Diagrams High Limit Thermostats Check, 8-4 Combo Mode High Limit Thermostats Replacement, 8-26 CC10-E, 2-14 CC10-G, 4-17 CC20-E, 3-26 Igniter Module Replacement, 8-51 CC20-G, 5-19 Installation Checks Oven Mode CC10-E, 2-2 CC10-E, 2-15 CC10-G, 3-2 CC10-G, 4-18...
  • Page 314 Service Code 7, 6-21 Service Code 8, 6-23 Service Messages, 6-1 Specifications CC10-E, 2-1 CC10-G, 4-1 CC20-E, 3-1 CC20-G, 5-1 Troubleshooting Ask the Customer, 7-1 After Arriving at the Customer Site, 7-2 Parts to Take on a Service Call, 7-2...

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