Instruction/ maintenance manual of the product VHX24E Vulcan-Hart
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A product of VULCAN-HART LOUISVILLE, KY 40201-0696 F25154 (February 2004) - NOTICE - This Manual is prepared for the use of trained Vulcan Service Technicians and s hould not be used by those not properly qualified.
VHX SERIES STEAMERS F25154 (February 2004) Page 2 of 48 TABLE OF CONTENTS G E N E R A L ................................................................................ 4 Installation, Operation and Cleaning ...........................................
VHX SERIES STEAMERS F25154 (February 2004) Page 3 of 48 E L E C T R I C A L O P E R A T I O N .................................................................. 2 4 Component Function ...................................................................
VHX SERIES STEAMERS - GENERAL F25154 (February 2004) Page 4 of 48 GENERAL INSTALLATION, OPERATION AND CLEANING Refer to the Installation and Operation Manual for specific instructions.
VHX SERIES STEAMERS - GENERAL F25154 (February 2004) Page 5 of 48 Boiler Code Descriptions Vulcan-Hart incorporates redundant controls in compliance with the CSD-1 controls and safety devices for boiler construction on the high efficiency steamer models.
VHX SERIES STEAMERS - COMPONENT FUNCTION F25154 (February 2004) Page 6 of 48 Electrical MODELS TOTA L KW AM P ER AG E 1 PHASE 3 PHA SE 208V 240V 208V 240V 480V VHX24E, VHX24E5, MHB24E 24 116 100 67 58 29 36 --- --- 100 87 44 42 --- --- 117 --- --- 48 --- --- --- 116 58 NOTES: 1.
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 THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES.
VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 8 of 48 4) Disconnect lead wires from other components as necessary then remove pressure switch mounting panel. 5) Remove screws securing switch to panel. B. High limit pressure switch.
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.
VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 10 of 48 B. Insert one end of glass tube into top gauge fitting then align opposite end of tube with bottom gauge fitting. C. Lower the glass tube into bottom gauge fitting then center the tube between top & bottom gauge fittings.
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 THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Remove heating elements as outlined under HEATING ELEMENTS.
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 plate with mounting studs for the element cover at the top.
VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 13 of 48 LEFT SIDE VIEW SHOWN LEFT SIDE VIEW SHOWN 18. Separate union at boiler drain. 19. On models with cooking compartments: A. Remove the left and right access panels between the cooking compartments and boiler base.
VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 14 of 48 3. To install: A. On the two replacement descalers, stretch the coiled wire (cathode) at the top to elongate the wire then form an open loop.
VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS F25154 (February 2004) Page 15 of 48 4. Remove the nuts and spacers from the handle screws and remove the handle from the door. NOTE: When installing the spacers, the smaller diameter fits into the slot in the door and the latch lever must rest on top of the handle latch screw.
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.
VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 17 of 48 1. Access the descalers (cathodic protectors) as outlined in REMOVAL AND REPLACEMENT OF PARTS. 2. Inspect the two descalers hanging in boiler. NOTE: As descalers erode over time, the diameter decreases while the length increases.
VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 18 of 48 1) Verify wire color connections are correct at probe numbers 50, 51 & 52, and at the water level control board. 2) Turn power switch off. 3) Remove probe assembly, clean lime scale build-up from the probes and compare probe lengths to drawing.
VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 19 of 48 B. Verify Low Water light is lit (front control panel). C. Verify 120VAC is on Aux LLCO COM, and 0 volt is on Aux LLCO N.O. contacts. 9. When water level reaches Aux LLCO probe as boiler continues to fill: A.
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 pr essure switch must be temporarily removed from the boiler control circuit.
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 switch off and disconnect power to machine.
VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 22 of 48 HEATING ELEMENT TEST VOLTA GE KW PER ELEMENT A MPS PER ELEMENT OHMS PER ELEMENT 208 9.0 14.4 14.4 240 9.0 12.5 19.2 480 9.0 6.3 76.8 208 10.5 16.9 12.4 208 12.
VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS F25154 (February 2004) Page 23 of 48 Door Sealing Adjustment 1. Check door gasket condition. If damaged or worn, replace as outlined under COOKING COMPARTMENT DOOR(S) in REMOVAL AND REPLACEMENT OF PARTS.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 24 of 48 ELECTRICAL OPERATION COMPONENT FUNCTION CABINET BASE BOILER CONTROLS Power Sw itch ................ C o n t r o l s 120VAC to the boiler control circuit. Reset Switch (Manual) .
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 25 of 48 Supply Voltage Transformer .... P r o v i d e s 120VAC to the boiler control and cooking compartment control circuits. Cycling Contactors B & D ...... S upplies line voltage to one side of heating elements thru cycling pressure switch N.
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 27 of 48 Boiler Base Controls Continued.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 28 of 48 Cooking Compartment Controls.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 29 of 48 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.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 30 of 48 Auxiliary Low Level Cut-Off This control serves as a safety backup to the main water level control (WLC) board to meet CSD-1 code requirements.
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 board relays (K1-K4) to the other steamer controls.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 32 of 48 Schematic.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 33 of 48 SEQUENCE OF OPERATION Refer to schematic diagram AI1385 for the electrical sequence of operation. Initial Fill and Preheat 1. Conditions. A. Boiler connected to correct supply voltage and is properly grounded.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 34 of 48 1) K4(1) N.O. contacts close and K4(1) N.C. contacts open. 2) High pressure light goes out. 3) K4(2) N.O. contacts close. a. AUX contactors A & C energized, heating elements powered.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 35 of 48 1) Compartment steam solenoid valve energized and steam begins to enter the compartment. 2) Ready light (green) goes out and Cooking light (red) comes on. NOTE: Steam should not be seen entering either compartment until a cook time is set.
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 37 of 48 Cooking Compartment Controls.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 38 of 48 WIRING DIAGRAMS Boiler Base Controls.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 39 of 48.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 40 of 48 Heating Element Circuits.
VHX SERIES STEAMER - ELECTRICAL OPERATION F25154 (February 2004) Page 41 of 48 Cooking Compartment 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 light and high pressure lights not lit. 1. Main circuit breaker off; or control circuit fuse F1 or F2 open.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES F25154 (February 2004) Page 43 of 48 Condenser drain box leaking. 1. Grommets or cover panel gasket not sealing. 2. Clog in drain line plumbing. 3. Drain restricted due to drain pipe size below 1-1/4" NPT.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES F25154 (February 2004) Page 44 of 48 Steamer on, boiler will not heat. Reset switch activated, low water light and high pressure light not lit, ready light lit. 1. Reset switch malfunction. 2.
VHX SERIES STEAMER - TROUBLESHOOTING F25154 (February 2004) Page 45 of 48 COOKING COMPARTMENT CONTROLS SYMPTOM POSSIBLE CAUSES Cooking compartments do not operate. 1. No power to cooking compartment controls. 2. Pressure in boiler is below compartment pressure switch setting.
VHX SERIES STEAMER F25154 (February 2004) Page 46 of 48 – NOTES –.
VHX SERIES STEAMER F25154 (February 2004) Page 47 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.
An important point after buying a device Vulcan-Hart VHX24E (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Vulcan-Hart VHX24E yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Vulcan-Hart VHX24E - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Vulcan-Hart VHX24E you will learn all the available features of the product, as well as information on its operation. The information that you get Vulcan-Hart VHX24E will certainly help you make a decision on the purchase.
If you already are a holder of Vulcan-Hart VHX24E, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Vulcan-Hart VHX24E.
However, one of the most important roles played by the user manual is to help in solving problems with Vulcan-Hart VHX24E. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Vulcan-Hart VHX24E along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
