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SERVICE MANUAL
C24GA SERIES
CONVECTION
STEAMERS
MODELS
C24GA6 ML-136021
C24GA10 ML-136022
- NOTICE -
This manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified. If you have attended a Vulcan Service School for this
product, you may be qualified to perform all the procedures
described in this manual.
This manual is not intended to be all encompassing. If you have
not attended a Vulcan Service School for this product,
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C24GA SERIES CONVECTION STEAMERS TABLE OF CONTENTS GENERAL................................................................................................................................................................ 4 Introduction ....................................................................................................................................................... 4 Installation ...................................................................................................
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C24GA SERIES CONVECTION STEAMERS ELECTRICAL OPERATION .................................................................................................................................... 22 Water Level Controls ...................................................................................................................................... 22 Low Level Cut-Off & Differential Control .................................................................................................... 22 Sequen
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C24GA SERIES CONVECTION STEAMERS - GENERAL GENERAL INTRODUCTION TOOLS Procedures in this manual will apply to all models Standard unless specified. Pictures and illustrations can be of • Standard set of hand tools. any model unless the picture or illustration needs to be model specific. • VOM with A.C. current tester (Any quality VOM with a sensitivity of at lease 20,000 ohms per volt can be used.) INSTALLATION Special Refer to the Installation and Operation Manual for • Gas leak detection equip
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS Cooking Compartment Left Side Panel COVERS AND PANELS 1. Remove the screws then remove the left side WARNING: DISCONNECT THE panel from the compartment. ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. Cooking Compartment Right Side Panel 1. Remove the screws then remove the right side panel from the compartment. Cabinet Base Right Side Panel 1. Remove the screws t
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS Cabinet Base Left Side Panel Cabinet Base Rear Panel 1. Remove the screws then remove the left side 1. Remove the screws then remove the rear panel panel from the cabinet base. from the cabinet base. Cabinet Base Front Panel COOKING COMPARTMENT 1. Remove the screws then remove the front panel DOOR from the cabinet base. Door Assembly 1. Remove compartment left side panel as outlined under COVERS AND PANELS. 2. Remove nuts from t
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS Door Gasket 1. Open the door. 2. Remove screws from the gasket guard and gasket plate. 3. Remove the gasket guard and the gasket plate. 4. Remove the plate, nuts, washers and spacers from the handle screws and remove the door handle from the door. 4. Position the new gasket on the gasket plate. 5. Reverse the procedure to install. 6. Adjust the door as outlined under SERVICE PROCEDURES AND ADJUSTMENTS. Damage to the gasket seali
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS Door Latch Assembly COMPARTMENT CONTROLS 1. Open the door. WARNING: DISCONNECT THE 2. Remove screws from the top and bottom of the ELECTRICAL POWER TO THE door. MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 3. Pull the outer door panel out from the door housing. 1. Remove compartment right side cover as outlined under COVERS AND PANELS. 2. Remove the component being replaced. 3. Reverse the procedure to install the re
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS Gas combination control valves are not serviceable MAIN BURNER and should not be disassembled. Once the problem has been isolated to this control, replace it. Do not WARNING: DISCONNECT THE attempt to repair the assembly. ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / 1. Remove the front and right side panels as TAGOUT PROCEDURES. outlined under COVERS AND PANELS. 2. Remove main burner as outlined in MAIN BURNER.
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 1. Drain the generator and allow steamer to cool, if necessary. 4. Disconnect wires to burner assembly. 5. Disconnect wires from gas combination control valve. 6. Remove the nuts securing the burner to generator. 7. Drop blower end of burner assembly slightly down to clear control box and push all wires out of the way so that burner can be pulled out of tank. 8. Disconnect wires from the 195°F thermostat mounted to the generator
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 19. Move any interfering components out of the way, then push generator slightly forward to disengage feet and remove generator from rear of cabinet. 20. Reverse procedure to install generator. FILL AND COLD WATER SOLENOID VALVES WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Turn off the water supply to the steamer. 2. Remove front and side covers as outlined under CO
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C24GA SERIES CONVECTION STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 4. Disconnect the water lines for the solenoid valve being serviced and remove the solenoid valve from the unit. 5. Reverse procedure to install solenoid valve. PILOT/SPARK PROBE FLAME SENSOR 1. Remove main burner assembly as outlined under MAIN BURNER in REMOVAL AND REPLACEMENT OF PARTS. 2. Remove the pilot assembly by disconnecting gas tube to the pilot burner and remove screws holding pilot assembly. 3. Replace the malfunctio
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASURE- MENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT / TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST. BLOWER AIR PRESSURE AIR PRESSURE SWITCH
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS The screw head should not extend out past PILOT BURNER ADJUSTMENT the screw housing. 1. Shut the gas off at combination gas valve. 1) If gas valve energizes, proceed to step 5. 2. Remove cover from manifold pressure tap. 2) If gas valve does not energize, check 3. Install a barb fitting and connect manometer. the following: 4. Turn on the steamer, let generator fill. a. Remove the lead wires from the 5. Verify air pressure set
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS 2. Turn the power on and let the generator come up to pressure. 3. After the ready light comes on, turn one of the cooking compartment timers on to exhaust steam from the generator. 16. Turn off the machine. 17. Re-install pilot, reconnect wire # 35. 18. Turn on the machine, let generator fill 19. Observe proper functioning of gas burner. Operating Pressure Switch 1. Remove the cabinet base front panel as outlined under COVERS
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS Thumb Wheel Adjustment Inlet Water/Steam Strainer The thumb wheel directly below the microswitch changes both the cut-out (off) and the cut-in (on) points of the operating Pressure Switch. Turn the thumb wheel to obtain the proper cut-out (off) setting. Turning thumb wheel clockwise increases the pressure. The cut-out (off) off setting should be 3.5 to 4 psi. 1. Unscrew the cap from the body. 2. Remove the screen and any forei
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS Spark Ignition Control Test AUTOMATIC IGNITION SYSTEMS The ignition control module and ignition control When the main power switch is turned on and the module transformer are located in the electronics water level is above LLCO, the ignition control module enclosure behind the generator base front cover. is energized with 24 volts between terminals five and six. High voltage is sent from terminal nine to the spark electrode an
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS A. If 24VAC is present, then replace ignition MANIFOLD PRESSURE control module and retest. It may take up to ADJUSTMENT 3 seconds for the module to reset if main power is turned off then back on. WARNING: DISCONNECT THE B. If 24VAC is not present, then ensure that ELECTRICAL POWER TO THE transformer is receiving 120VAC input. If MACHINE AND FOLLOW LOCKOUT / ignition control module transformer is TAGOUT PROCEDURES. rec
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS 5. Verify burner air pressure is 0.35" to 0.4" W.C. 5. Check wiring for damaged insulation (no short circuit). 6. Turn the gas combination control valve on and wait until main burner lights. 6. Check that all connections and terminals are securely fastened (no open circuits). 7. Observe the manometer pressure reading and compare to the pressure chart below. 7. Check that all connections are made according to compartment contro
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C24GA SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS Striker Adjustment • Safety goggles or face shield. 1. Reinstall the striker with the slot pointing • Measuring cup. upwards and hand tighten nut only. • 1 gallon container for mixing deliming solution. 2. Close the door to center the striker in the oval • Petrol-Gel Lubricant or equivalent food grade mounting hole. grease for coating deliming port threads. 3. Open the door and check the striker’s slot for NOTE: Deliming solut
