Vulcan MHB24E - Manuals

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 7 of 48 REMOVAL AND REPLACEMENT OF PARTS PRESSURE SWITCH CONTROL BOX COMPONENTS WARNING: DISCONNECT THE ELECTRICAL POWER TO THEMACHINE AND FOLLOW LOCKOUT /TAGOUT PROCEDURES. CAUTION: Certain components in this system ...

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 9 of 48 LEFT SIDE VIEW SHOWN 4. To remove: A. Contactors. 1) Release catch at the base of contactor and remove from DIN rail. B. Relays. 1) Remove from socket. C. Relay Board. 1) Compress locking tab on the boardmount...

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 10 of 48 B. Insert one end of glass tube into top gaugefitting then align opposite end of tube withbottom gauge fitting. C. Lower the glass tube into bottom gaugefitting then center the tube between top &bottom ga...

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 11 of 48 HEATING ELEMENT MOUNTING PLATE WARNING: DISCONNECT THE ELECTRICAL POWER TO THEMACHINE AND FOLLOW LOCKOUT /TAGOUT PROCEDURES. 1. Remove heating elements as outlined underHEATING ELEMENTS. 2. Loosen mounting ha...

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 12 of 48 RIGHT SIDE VIEW SHOWN LEFT SIDE VIEW SHOWN C. Position heating element mounting platewith mounting studs for the element coverat the top. NOTE: When installing heating element mounting plate , install and tig...

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 14 of 48 3. To install: A. On the two replacement descalers, stretchthe coiled wire (cathode) at the top toelongate the wire then form an open loop. B. Hang the descalers on the front horizontalsupport rod; one to the...

VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 16 of 48 SERVICE PROCEDURES AND ADJUSTMENTS WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRES ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALLTIMES. IF TEST PO...

VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 17 of 48 1. Access the descalers (cathodic protectors) asoutlined in REMOVAL AND REPLACEMENTOF PARTS. 2. Inspect the two descalers hanging in boiler. NOTE: As descalers erode over time, the diameter decreases while t...

VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 20 of 48 HIGH LIMIT PRESSURE SWITCH ADJUSTMENT NOTE: Before the high limit pressure switch can be adjusted, the cycling pressure switch must be temporarily removed from the boiler control circuit. This allows the boi...

VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 21 of 48 3. To check boiler fill valve: A. Verify 120VAC to solenoid valve coil. B. If voltage is correct but valve is not opening(little or no water flow), turn power switchoff and disconnect power to machine. 1) Re...

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 24 of 48 ELECTRICAL OPERATION COMPONENT FUNCTION CABINET BASE BOILER CONTROLS Power Switch . . . . . . . . . . . . . . . . Controls 120VAC to the boiler control circuit. Reset Switch (Manual) . . . . . . . . . Resets the low water...

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 25 of 48 Supply Voltage Transformer . . . . Provides 120VAC to the boiler control and cooking compartment control circuits. Cycling Contactors B & D . . . . . . Supplies line voltage to one side of heating elements thru cyclin...

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 26 of 48 COMPONENT LOCATIONS Boiler Base Controls

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 31 of 48 RELAY BOARD Layout, Legend & Diagnostic Test Points The relay board provides a centralized location for wire harness connections and power transfer through boardrelays (K1-K4) to the other steamer controls. Also, prov...

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 33 of 48 SEQUENCE OF OPERATION Refer to schematic diagram AI1385 for the electricalsequence of operation. Initial Fill and Preheat 1. Conditions. A. Boiler connected to correct supply voltageand is properly grounded. 1) Supply vol...

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 36 of 48 SCHEMATICS Boiler Base Controls

VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 38 of 48 WIRING DIAGRAMS Boiler Base Controls

VHX SERIES STEAMER - TROUBLESHOOTING F25154 (February 2004) Page 42 of 48 TROUBLESHOOTING BOILER BASE CONTROLS SYMPTOM POSSIBLE CAUSES Steamer does not operate, low water lightand high pressure lights not lit. 1. Main circuit breaker off; or control circuit fuse F1 or F2 open. 2. Supply voltage inco...

VHX SERIES STEAMER F25154 (February 2004) Page 46 of 48 – NOTES –

VHX SERIES STEAMER - CONDENSED SPARE PARTS LIST F25154 (February 2004) Printed in U.S.A. CONDENSED SPARE PARTS LIST VHX24E, VHX24E5, MHB24E BOILER BASE PART NUMBER DESCRIPTION NOTES 855051-1 Element, 9kw 208V 855051-2 Element, 9kw 240V 855051-3 Element, 9kw 480V 855051-4 Element, 10.5kw 208V 855051-...