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Vulcan-Hart C24EA5 480V BASIC manual

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  • Page 1

    A product of VULCAN-HART LOUISVILLE, KY 40201-0696 F25213 (May 2006) - 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. [...]

  • Page 2

    MODEL C24EA - GENERAL F25213 (May 2006) Page 2 of 52 TABLE OF CONTENTS G E N E R A L ................................................................................ 3 C O V E R S A N D P A N E L S ..................................................................... 6 D O O R ........................................................................[...]

  • Page 3

    MODEL C24EA - GENERAL F25213 (May 2006) Page 3 of 52 GENERAL INTRODUCTION This manual is applicable to the models and ML numbers listed on the cover page. Procedures apply to all models unless specified otherwise. Steam Cooking Atmospheric steamers offer an efficient way to produce many foods in either small portions or larger batches. Atmospheric [...]

  • Page 4

    MODEL C24EA - GENERAL F25213 (May 2006) Page 4 of 52 SPECIFICATIONS NOTE: All C24EA steamers, with exception of 480V steamers, are shipped pre-wired for 208/60/3 operation. Steamer heating element wiring connection change is r equired if connecting to 208/60/1, 240/60/1 or 240/60/3 electrical service. ELECTRICAL SPECIFICATIONS MODEL TOTAL kW Hz. AM[...]

  • Page 5

    MODEL C24EA - GENERAL F25213 (May 2006) Page 5 of 52 Other chemical properties in water supplies can also affect good steam generation and vary from within each state and locality. The water level probes in the steam generator tank use ions in the water to detect the water level. Do not use fully demineralized or de-ionized water since it is non- c[...]

  • Page 6

    MODEL C24EA - COVERS AND PANELS F25213 (May 2006) Page 6 of 52 RIGHT SIDE SHOWN COVERS AND PANELS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. RIGHT AND LEFT SIDE PANELS NOTE: Removal of left side panel is identical to the procedure for the right side panel. 1. Remove screws from the bottom of pane[...]

  • Page 7

    MODEL C24EA - COVERS AND PANELS F25213 (May 2006) Page 7 of 52 SCREW LOCATION REAR PANEL WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Remove screws securing top cover to rear panel and rear panel to steamer frame. NOTE: If incoming plumbing or drain interferes with rear panel removal, turn off w[...]

  • Page 8

    MODEL C24EA - DOOR F25213 (May 2006) Page 8 of 52 DOOR WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL 1. Close door. 2. Remove LEFT SIDE PANEL as outlined in COVERS AND PANELS. 3. Remove nuts from upper hinge located inside front panel. 4. Open door slightly, and while holding door, pull uppe[...]

  • Page 9

    MODEL C24EA - DOOR F25213 (May 2006) Page 9 of 52 DOOR HANDLE Removal 1. Open door. 2. Remove screws from top and bottom of door assembly. 3. Pull outer door housing away from inner door panel starting at the hinge side of door to separate the door halves. NOTE: The smaller radius of the step spacers fit into the slots of the outer door housing and[...]

  • Page 10

    MODEL C24EA - DOOR F25213 (May 2006) Page 10 of 52 LATCH ASSEMBLY Removal and Disassembly 1. Separate outer door housing assembly from inner door panel as outlined under DOOR HANDLE. 2. Remove screws securing latch assembly to inner door panel and remove latch mechanism. 3. Remove E-clip from latch assembly pins and pull pins from latch mechanism. [...]

  • Page 11

    MODEL C24EA - DOOR F25213 (May 2006) Page 11 of 52 2. Install outer door housing assembly as outlined in DOOR HANDLE. 3. Check opening and closing operation of door. 4. Check steamer for proper operation and leaks around door seal. HINGE BEARINGS 1. Close door. 2. Remove LEFT SIDE PANEL as outlined in COVERS AND PANELS. 3. Remove nuts from upper hi[...]

  • Page 12

    MODEL C24EA - DRAIN BOX F25213 (May 2006) Page 12 of 52 CLOSE-UP FROM RIGHT SIDE OF STEAMER Adjustment 1. Reinstall striker with slot pointing upward and hand tighten nut only. 2. Close door to center striker in front panel mounting hole. 3. Open door and check striker slot for horizontal alignment. The slot on striker must be kept horizontal in or[...]

  • Page 13

    MODEL C24EA - COOKING COMPARTMENT F25213 (May 2006) Page 13 of 52 PROFESSIONAL MODEL SHOWN COOKING COMPARTMENT WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL AND REPLACEMENT NOTE: The cooking compartment and front panel are constructed as an assembly and cannot be separated. 1. Turn off machi[...]

  • Page 14

    MODEL C24EA - COOKING COMPARTMENT F25213 (May 2006) Page 14 of 52 8. Remove the screws securing front panel to lower louvered panel. 9. Remove the nuts securing rear of cooking compartment to the vertical mounting brackets (four places - located between cooking compartment and steam generator). 10. Remove cooking compartment assembly. 11. If remove[...]

  • Page 15

    MODEL C24EA - THERMOSTATS F25213 (May 2006) Page 15 of 52 THERMOSTATS HOLD THERMOSTAT WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Turn off machine to drain steam generator tank. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove RIGHT SIDE PANEL as outlined under COVERS [...]

  • Page 16

    MODEL C24EA - THERMOSTATS F25213 (May 2006) Page 16 of 52 Installation 1. Insert capillary bulb through large compression nut. A. Route capillary bulb through top of heating element. B. Position capillary bulb between top of second and third heating element coils. Secure with hose clamp to second coil as shown. 2. Apply pipe thread sealant to threa[...]

  • Page 17

    MODEL C24EA - TIMER F25213 (May 2006) Page 17 of 52 TIMER WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL AND REPLACEMENT NOTE: The basic and professional model steamers use the same 60 minute timer. When the timer reaches zero, an external buzzer will sound and steam will stop entering the co[...]

  • Page 18

    MODEL C24EA - HEATING ELEMENT F25213 (May 2006) Page 18 of 52 BASIC MODEL SHOWN HEATING ELEMENT WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL AND REPLACEMENT 1. Turn off machine to drain steam generator tank. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove RIGHT SI[...]

  • Page 19

    MODEL C24EA - HEATING ELEMENT F25213 (May 2006) Page 19 of 52 9. Reassemble parts removed in reverse order of remo val. Tighten heating element screws evenly to 70 in*lbs. Follow tightening sequence pattern as shown in illustration. 10. Check steamer for proper operation and leaks around heating element. DIAGNOSTIC CHECKS WARNING: CERTAIN PROCEDURE[...]

  • Page 20

    MODEL C24EA - SUPER HEATER F25213 (May 2006) Page 20 of 52 SUPER HEATER WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL AND REPLACEMENT 1. Turn off machine to drain steam generator tank. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove RIGHT SIDE PANEL as outlined und[...]

  • Page 21

    MODEL C24EA - SUPER HEATER F25213 (May 2006) Page 21 of 52 DIAGNOSTIC CHECKS WARNING: CERTAIN PROCEDURES IN THIS SECTION RE QUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCI SE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT / TAGOUT PROCEDURES, ATTACH TES[...]

  • Page 22

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 22 of 52 WATER LEVEL CONTROL COMPONENTS WATER LEVEL CONTROLS Low Level Cut-Off & Differential Control The steamer is equipped with three water level sensing probes (high, low and low level cut-off) and a water level control board. The water level control board performs two func[...]

  • Page 23

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 23 of 52 WATER LEVEL CONTROL BOARD WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. CAUTION: Certain components in this system are subject to damage by electrostatic discharge during field repairs. A field service grounding kit is avai[...]

  • Page 24

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 24 of 52 NOTE: Perform a steam generator tank cleaning as outlined under STEAM GENERATOR TANK - CLEANING. FILTERED AND NON-FILTERED WATER SOLENOID VALVES WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. NOTE: The filtered and non-filte[...]

  • Page 25

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 25 of 52 VIEW FROM LEFT SIDE OF STEAMER 6. Reassemble parts removed in reverse order of removal. 7. Verify that the filtered water supply is connected to the input of the filtered water solenoid valve. 8. Check steamer for leaks and proper operation. Non-Filtered Cold Water Solenoi[...]

  • Page 26

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 26 of 52 NOTE: Apply pipe thread sealant to plumbing threads before assembly. 7. Reassemble parts removed in reverse order of removal. 8. For Basic model steamers, perform ON/OFF SWITCH ADJUSTMENT as outlined in ON/OFF SWITCH. 9. Check steamer for leaks and proper operation. MOTORI[...]

  • Page 27

    MODEL C24EA - WATER LEVEL CONTROL COMPONENTS F25213 (May 2006) Page 27 of 52 5. Disconnect the drain and drain flush hoses from the Tee located below the drain valve. 6. Remove the drain valve body from the steam generator tank. 7. Separate the Tee and nipple from the drain valve body. 8. Reassemble parts removed in reverse order. Apply liquid pipe[...]

  • Page 28

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 28 of 52 SWITCHES, BUZZER AND SOLENOIDS ON/OFF SWITCH WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. Basic Models 1. Pull out on handle to turn steamer off and drain generator tank. 2. Remove the RIGHT SIDE PANEL. 3. Locate the on/of[...]

  • Page 29

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 29 of 52 3. Push handle fully in and keep in position. 4. Position plunger of on/off switch against linkage bracket such that plunger is fully engaged. A. Adjust switch such that switch plunger is perpendicular with linkage bracket when handle is pushed in fully. B. Tighten switch [...]

  • Page 30

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 30 of 52 A. Close door. B. Push switch up against switch linkage as far as possible. C. Tighten switch mounting hardware. 3. Check door switch operation. A. Set meter to measure resistance and place meter leads across the COMMON and NORM OPEN terminals of switch. With door closed, [...]

  • Page 31

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 31 of 52 6. Perform pressure switch Check. Check NOTE: Pressure can be checked with the small air pocket that exists between the delime port cap and water level probe housing in the delime hose. Make certain that no leaks exist in generator tank or pressure gauge fittings. 1. Turn [...]

  • Page 32

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 32 of 52 C. Repeat clamping of steam outlet hose a total of three times to find the average cut- out pressure. Record pressure. D. If pressure is outside tolerance (4.5 to 4.7 psi), adjustment is necessary. Refer to Adjustment. E. If cut-out pressure is within specifications, shut [...]

  • Page 33

    MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS F25213 (May 2006) Page 33 of 52 A. Install valve with the inlet (ON) side of valve connected to the back panel port and the outlet (OFF) side of valve connected to the water level control plumbing. Apply liquid thread sealant to threads of piping before assembly. BUZZER WARNING: DISCONNECT THE ELECTRICAL[...]

  • Page 34

    MODEL C24EA - STEAM GENERATOR TANK F25213 (May 2006) Page 34 of 52 STEAM GENERATOR TANK WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. REMOVAL AND REPLACEMENT 1. Turn off machine to drain steam generator tank. Allow steamer to complete drain cycle. A. Turn off water supply. 2. Remove the TOP COVER, R[...]

  • Page 35

    MODEL C24EA - STEAM GENERATOR TANK F25213 (May 2006) Page 35 of 52 10. Remove remaining steam outlet elbow plumbing from steam generator tank. 11. Remove delime hose from water level probe assembly. 12. Remove hose from the vacuum relief solenoid. 13. Note wiring connection points and remove the electrical wires from the VACUUM RELIEF SOLENOID, WAT[...]

  • Page 36

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 36 of 52 ELECTRICAL OPERATION COMPONENT FUNCTION W a t e r L e v e l C o n t r o l ( W L C ) B o a r d ......... Controls water level by monitoring conditions of the three water level probes H, L and LLCO. B u z z e r ................................ Creates audible signal when timed cook cy[...]

  • Page 37

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 37 of 52 Solenoid (4SOL), Slow Fill ............... Primary fill for Basic machines and secondary fill for Professional machines. Energized as necessary during operation to replenish water in generator tank. S o l e n o i d ( 5 S O L ) , V a c u u m R e l i e f ........... Provides open air [...]

  • Page 38

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 38 of 52 COMPONENT LOCATION Electrical Control Panel NOTE: Relay K4 and transformer T2 are present on Professional models only.[...]

  • Page 39

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 39 of 52 Water Level Control Board[...]

  • Page 40

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 40 of 52 Front Panel[...]

  • Page 41

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 41 of 52 Steam Generator and Back Panel[...]

  • Page 42

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 42 of 52 SEQUENCE OF OPERATION Refer to the correct wiring diagram for model being serviced when reviewing sequence of operation. NOTE: If power switch is set to off when service voltage is applied, steamer will enter the timed drain cycle. Basic Model 1. Conditions A. Steamer connected to c[...]

  • Page 43

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 43 of 52 B. Time delay relay is energized through terminals 2 & 3 for set time (90 seconds). Output (120VAC) on terminal 1. C. Time delay relay output energizes K3 coil. 1) X1 potential to L1 of WLC board through N.O. contacts K3-5/3 2) LLCO relay K2 coil energized through closed N.O. co[...]

  • Page 44

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 44 of 52 A. No action as internal latching relay (ILR-1) contacts are open. 8. Water level reaches high level(H) probe. A. Internal latching relay (ILR) coil on WLC board energizes. B. High level (HL) coil de-energized by ILR-2 contacts opening. C. Slow Fill Solenoid de-energized by opening [...]

  • Page 45

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 45 of 52 WIRING DIAGRAMS Heating Element Wiring[...]

  • Page 46

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 46 of 52[...]

  • Page 47

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 47 of 52[...]

  • Page 48

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 48 of 52[...]

  • Page 49

    MODEL C24EA - ELECTRICAL OPERATION F25213 (May 2006) Page 49 of 52[...]

  • Page 50

    MODEL C24EA - TROUBLESHOOTING F25213 (May 2006) Page 50 of 52 TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES Compartment leaks water around door. 1. Unit not level. 2. Drain line obstructed or not to an open gap drain. 3. Door gasket damaged. Cold water condenser not operating properly. 1. Solenoid (2SOL) inoperative or plugged. 2. Lack of water supply. 3[...]

  • Page 51

    MODEL C24EA - TROUBLESHOOTING F25213 (May 2006) Page 51 of 52 - N O T E S -[...]

  • Page 52

    MODEL C24EA - CONDENSED SPARE PARTS LIST F25213 (May 2006) Printed in U.S.A. CONDENSED SPARE PARTS LIST C24EA PART NO. DESCRIPTION Basic Professional Qty. 844069-1 W ater Level Control Board (WLC) X X 1 856658-1 C avity Vacuum Breaker X X 1 294500-33 Transformer X X 1 410472-8 Terminal Block - Main X X 1 411500-12 Transformer (2T) X 1 416535-6 Rela[...]