Page 2 - TABLE OF CONTENTS
MODEL C24EA F35453 (July 2008) Page 2 of 68 TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 COVERS AND PANELS . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3 - GENERAL; INTRODUCTION; MODELS COVERED; SPECIFICATIONS
MODEL C24EA - GENERAL F35453 (July 2008) Page 3 of 68 GENERAL INTRODUCTION This manual is applicable to the models and MLnumbers listed on the cover page. Procedures applyto all models unless specified otherwise. Steam Cooking Convection steamers offer an efficient way toproduce many foods in either...
Page 4 - REFERENCE MATERIAL; TOOLS
MODEL C24EA - GENERAL F35453 (July 2008) Page 4 of 68 Other chemical properties in water supplies can alsoaffect good steam generation and vary from withineach state and locality. The water level probes in the steam generator useions in the water to detect the water level. Do not usefully deminerali...
Page 5 - COVERS AND PANELS; FRONT BASE PANEL
MODEL C24EA - COVERS AND PANELS F35453 (July 2008) Page 5 of 68 COVERS AND PANELS FRONT BASE PANEL 1. Remove screws from the bottom of panel. 2. Pull bottom of panel out and slide down to cleartabletop cover. 3. Reverse procedure to install. RIGHT AND LEFT SIDE BASE PANELS NOTE: Removal of left side...
Page 7 - DOOR; REMOVAL; GASKET
MODEL C24EA - DOOR F35453 (July 2008) Page 7 of 68 DOOR REMOVAL 1. Close door. 2. Remove COOKING COMPARTMENT LEFTSIDE PANEL as outlined under COVERS ANDPANELS. 3. Remove nuts from upper hinge located insidefront panel. 4. Open door slightly, and while holding door, pullupper hinge away from front pa...
Page 8 - DOOR HANDLE
MODEL C24EA - DOOR F35453 (July 2008) Page 8 of 68 DOOR HANDLE Removal 1. Open door. 2. Remove screws from top and bottom of doorassembly. 3. Pull outer door housing away from inner doorpanel starting at the hinge side of door toseparate the door halves. NOTE: The smaller radius of the step spacers ...
Page 9 - LATCH ASSEMBLY
MODEL C24EA - DOOR F35453 (July 2008) Page 9 of 68 LATCH ASSEMBLY Removal and Disassembly 1. Separate outer door housing assembly frominner door panel as outlined under DOORHANDLE. 2. Remove screws securing latch assembly toinner door panel and remove latch mechanism. 3. Remove E-clip from latch ass...
Page 10 - HINGE BEARINGS
MODEL C24EA - DOOR F35453 (July 2008) Page 10 of 68 Installation 1. Install latch assembly onto inner door panel withspring pin toward bottom of door panel. A. Apply Loctite 271 to threads of screwsbefore assembly and secure latchassembly to inner door panel. 2. Install outer door housing assembly a...
Page 12 - THERMOSTAT AND HIGH LIMITS; HEAT EXCHANGER HIGH LIMIT
MODEL C24EA - THERMOSTATS AND HIGH LIMITS F35453 (July 2008) Page 12 of 68 THERMOSTAT AND HIGH LIMITS HEAT EXCHANGER HIGH LIMIT 1. Turn off machine to drain steam generator.Allow steamer to complete drain cycle. 2. Remove RIGHT SIDE BASE PANEL asoutlined under COVERS AND PANELS. 3. Disconnect electr...
Page 13 - CONDENSATE THERMOSTAT
MODEL C24EA - THERMOSTATS AND HIGH LIMITS F35453 (July 2008) Page 13 of 68 8. Remove capillary tube from heating element. Installation 1. Route capillary bulb through the opening inheating element mounting plate. Ensure thereare no sharp bends in capillary tubing whileinstalling. A. Insert capillary...
Page 14 - TIMERS; REMOVAL AND REPLACEMENT
MODEL C24EA - TIMERS F35453 (July 2008) Page 14 of 68 TIMERS REMOVAL AND REPLACEMENT NOTE: When the timer reaches zero, an external buzzer will sound and steam will stop entering thecooking compartment. The constant steam settingallows for continuous steam operation. 1. Remove COOKING COMPARTMENT RI...
Page 15 - HEATING ELEMENTS AND CONTACTORS
MODEL C24EA - HEATING ELEMENTS AND CONTACTORS F35453 (July 2008) Page 15 of 68 HEATING ELEMENTS AND CONTACTORS REMOVAL AND REPLACEMENT Heating Elements 1. Turn off machine to drain steam generator.Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove FRONT BASE PANEL as outlined...
Page 16 - HEATING ELEMENTS
MODEL C24EA - HEATING ELEMENTS AND CONTACTORS F35453 (July 2008) Page 16 of 68 Contactors 1. Turn off machine to drain steam generator.Allow steamer to complete drain cycle. 2. Remove FRONT BASE PANEL as outlinedunder COVERS AND PANELS. 3. Remove top screw securing cover to highvoltage box. 4. Note ...
Page 18 - HEAT EXCHANGER ELEMENTS AND RELAYS
MODEL C24EA - HEAT EXCHANGER ELEMENTS AND RELAYS F35453 (July 2008) Page 18 of 68 HEAT EXCHANGER ELEMENTS AND RELAYS REMOVAL AND REPLACEMENT Heat Exchanger Elements 1. Turn off machine to drain steam generator.Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove FRONT BASE PANE...
Page 21 - WATER LEVEL CONTROL COMPONENTS; WATER LEVEL CONTROL - LOW LEVEL CUT-OFF AND
MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F35453 (July 2008) Page 21 of 68 WATER LEVEL CONTROL COMPONENTS WATER LEVEL CONTROL - LOW LEVEL CUT-OFF AND DIFFERENTIAL OPERATION The steamer is equipped with three water level sensing probes(high, low and low level cut-off) and a water level control. Th...
Page 23 - FILTERED AND NON-FILTERED
MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F35453 (July 2008) Page 23 of 68 DUAL WATER VALVES SHOWN FILTERED AND NON-FILTERED DUAL WATER SOLENOID VALVES NOTE: The filtered and non-filtered water solenoid valves are constructed as dual water valve assemblies. The two water valve assemblies used on ...
Page 24 - MOTORIZED DRAIN VALVE
MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F35453 (July 2008) Page 24 of 68 6. Remove screws (2) securing dual watersolenoid valve to rear panel. 7. Reassemble parts removed in reverse order. 8. Verify water supply is connected to the correctdual water solenoid valve (filtered or nonfiltered). 9. ...
Page 29 - VACUUM RELIEF SOLENOID
MODEL C24EA - SWITCHES, SOLENOIDS, RELAY, AND BUZZER F35453 (July 2008) Page 29 of 68 B. Check cut-out pressure after makingadjustment. Repeat Check and Adjustmentas necessary until cut-out pressure iswithin 3.5 to 3.7 psi. PRESSURE SWITCH (2PAS) 1. Turn off machine to drain steam generator.Allow st...
Page 31 - BUZZER
MODEL C24EA - SWITCHES, SOLENOIDS, RELAY, AND BUZZER F35453 (July 2008) Page 31 of 68 BUZZER 1. Remove COOKING COMPARTMENT RIGHTSIDE PANEL as outlined under COVERS ANDPANELS. 2. Locate buzzer on the door switch mountingbracket. 3. Disconnect electrical wiring from the buzzer anddoor switch. 4. Remov...
Page 32 - CONTROL BOARD
MODEL C24EA - CONTROL BOARD F35453 (July 2008) Page 32 of 68 CONTROL BOARD REMOVAL AND REPLACEMENT 1. Remove FRONT BASE PANEL as outlined under COVERS AND PANELS. 2. Disconnect electrical connectors from control board. 3. Squeeze tab on plastic standoffs (10) to release control board. 4. Reassemble ...
Page 33 - LAYOUT AND LED LEGEND
MODEL C24EA - CONTROL BOARD F35453 (July 2008) Page 33 of 68 LAYOUT AND LED LEGEND The control board provides a central location for wire harness connections and power transfer through boardrelays (K1-K9, and K11) and time delay relays (delime 1, delime 2 and drain) to the steamer controls. Also,pro...
Page 34 - STEAM GENERATOR OPERATIONAL STATUS
MODEL C24EA - CONTROL BOARD F35453 (July 2008) Page 34 of 68 STEAM GENERATOR OPERATIONAL STATUS (LED INDICATORS) Use the tables below to determine the operational status of a component or condition by utilizing the LEDindicators on the board. The sections are divided according to their operational s...
Page 38 - DELIMING CYCLE STATUS
MODEL C24EA - CONTROL BOARD F35453 (July 2008) Page 38 of 68 DELIMING CYCLE STATUS (LED INDICATORS) • Conditions same as listed under STARTING CONDITIONS.• Delime time delay relay 2 (TDR) and drain time delay relay (TDR) jumpers on the control board are set at their default times as shown on the sch...
Page 42 - HEAT EXCHANGER
MODEL C24EA - HEAT EXCHANGER F35453 (July 2008) Page 42 of 68 HEAT EXCHANGER REMOVAL AND REPLACEMENT 1. Turn off machine to drain steam generator. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove FRONT and RIGHT SIDE BASE PANELS as outlined under COVERS ANDPANELS. 3. Discon...
Page 43 - MOTORIZED DELIME VALVE
MODEL C24EA - HEAT EXCHANGER F35453 (July 2008) Page 43 of 68 MOTORIZED DELIME VALVE NOTE: The motorized delime valve (normally closed) can be opened or closed manually by pushing in onthe manual override knob on top of the valve todisengage the gear set. Rotate knob CW to open thevalve (slot in kno...
Page 44 - STEAM GENERATOR
MODEL C24EA - STEAM GENERATOR F35453 (July 2008) Page 44 of 68 STEAM GENERATOR REMOVAL AND REPLACEMENT 1. Turn off machine to drain steam generator. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove FRONT, LEFT and RIGHT SIDE BASE PANELS from generator base and COOKINGCOMPAR...
Page 45 - DELIMING
MODEL C24EA - STEAM GENERATOR F35453 (July 2008) Page 45 of 68 C. Remove four bolts securing high voltagecontrol box to frame. 12. Remove low voltage control box fromsteamer. A. Disconnect wiring harness connectorleading to cooking compartment controls. B. Disconnect delime valve and drain valveharn...
Page 46 - ELECTRICAL OPERATION; COMPONENT FUNCTION; STEAM GENERATOR CONTROLS
MODEL C24EA - ELECTRICAL OPERATION F35453 (July 2008) Page 46 of 68 ELECTRICAL OPERATION COMPONENT FUNCTION STEAM GENERATOR CONTROLS Water Level Control (WLC) . . . . . . . . . . . . . . . Controls water level by monitoring conditions of the three waterlevel probes H, L and LLCO. Probe (H) . . . . ....
Page 48 - COOKING COMPARTMENT CONTROLS
MODEL C24EA - ELECTRICAL OPERATION F35453 (July 2008) Page 48 of 68 Relay (K9), Cavity . . . . . . . . . . . . . . . . . . . . . . Controlled by lower cooking compartment timer. When timer isset, relay is energized and power is provided thru K8-1/5 N.C.contacts to cavity condensate solenoid and heat...
Page 49 - COMPONENT LOCATION
MODEL C24EA - ELECTRICAL OPERATION F35453 (July 2008) Page 49 of 68 COMPONENT LOCATION Steam Generator Base
Page 58 - SCHEMATIC DIAGRAMS
MODEL C24EA - ELECTRICAL OPERATION F35453 (July 2008) Page 58 of 68 SCHEMATIC DIAGRAMS
Page 62 - WIRING DIAGRAMS
MODEL C24EA - ELECTRICAL OPERATION F35453 (July 2008) Page 62 of 68 WIRING DIAGRAMS Heating Element Wiring
Page 66 - TROUBLESHOOTING
MODEL C24EA - TROUBLESHOOTING F35453 (July 2008) Page 66 of 68 TROUBLESHOOTING Before performing any of the troubleshooting checks listed below, remove the front generator base panel andcheck the LED’S on the control board for the status of the condition or component in the operating sequence. Byuti...
