Summary of the content on the page No. 1
SERVICE MANUAL
VPX SERIES
ELECTRIC
COUNTERTOP
STEAMERS
MODEL ML
VPX3 126586
VPX5 126588
- 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, you s
Summary of the content on the page No. 2
VPX SERIES STEAMERS TABLE OF CONTENTS GENERAL ................................................................................ 3 Installation, Operation and Cleaning ........................................................ 3 Introduction ............................................................................ 3 Features .......................................................................... 3 Steam Cooking ..................................................................... 3 Model Desig
Summary of the content on the page No. 3
VPX SERIES STEAMERS - GENERAL GENERAL Hardness of 2-3 grains (34-35ppm) INSTALLATION, OPERATION Total dissolved solids (TDS) less than 60ppm AND CLEANING Ph factor of 7.0 to 7.5 These specifications can easily be obtained Refer to the Installation & Operation Manual for with the use of a properly maintained water specific instructions. softener. NOTE: Daily cleaning is required. 2.5 gallons to fill holding pan (approximate) INTRODUCTION Electric 1 AMPERAGE PER LINE (60HZ) Features TOTAL
Summary of the content on the page No. 4
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. Right Side Panel 1. Remove screws from bottom of panel. 4. Pull the combination left side and rear panel off. 5. Reverse procedure to install. Lower Front Cover 1. Remove screws from the lower front cover. 2. Slide panel down to clear top c
Summary of the content on the page No. 5
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 4. Reverse procedure to install replacement component and check steamer for proper operation. NOTE: If replacing temperature control, see "TEMPERATURE CONTROL CALIBRATION - ADJUSTMENT FOR ELEVATION" in "SERVICE PROCEDURES AND ADJUSTMENTS". 3. Grasp thermostat body and push up to slide holding tabs out from mounting bracket. 4. Apply a small amount of "thermal transfer TIMER compound" to the mating surface (disk side) of the replacement ther
Summary of the content on the page No. 6
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS NOTE: Thermostat base is a brass 5/8" hex with a NOTE: As the steamer is disassembled, remove the threaded stem. sheets of insulation from top, rear and left side, and the bottom. Retain insulation for use during re- 4. Apply a small amount of "thermal transfer assembly. compound" to the mating surface (disk side) of the replacement thermostat. 1. Remove all covers and panels as outlined under "COVERS AND PANELS". A. Spread the compound comp
Summary of the content on the page No. 7
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 7. Disconnect high limit thermostat lead wires and remove high limit from heating element assembly. 8. Remove heating element assembly from steamer. 5. Remove mounting nuts & washers from the rear cooking compartment support legs and remove base. 6. Disconnect heating element lead wires from element terminals. 9. Clean Loctite residue from heating element assembly mounting stud threads. 10. Apply approximately 4 oz. of heat transfer compoun
Summary of the content on the page No. 8
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS A. Temporarily install a flat washer and nut on A. Place wooden blocks opposite door handle to level and support steamer. all mounting studs. Hand tighten only. B. Tighten each nut to 100 in-lb using the 3. Grasp component panel and remove screws sequence as shown. securing it to the base. A. Lower component panel and leave at side of steamer so that all the component lead wires can remain connected. 4. Remove screws securing base to steamer
Summary of the content on the page No. 9
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS 5. Remove mounting nuts & washers from the rear DOOR cooking compartment support legs and remove base. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. Removal 1. Remove top cover as outlined under "COVERS AND PANELS". 2. Open the door. 3. Pull hinge rod up. 4. Reverse procedure to install, making sure the door bushings are in place. 6. R
Summary of the content on the page No. 10
VPX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS Gasket 1. Open the door. 2. Remove screws from the gasket plate. 3. Pull the gasket plate out from the door housing and remove the gasket. 4. Position the new gasket on the gasket plate and reverse the procedure to install. Adjust the door as outlined under "DOOR SEALING ADJUSTMENT". NOTE: Do not over tighten gasket plate screws as this will compress the gasket excessively and interfere with proper door sealing. 4. Remove the nuts and spacer
Summary of the content on the page No. 11
VPX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS Latch Assembly 1. Open the door. 2. Remove screws from the top and bottom of the door. 3. Pull the "inner" door panel out from the door housing with the gasket plate and gasket still attached. 4. Remove the screws from the side edge of the door that secure the latch mechanism and remove the latch from the door. NOTE: When installing, the latch lever must rest on top of the handle latch screw. 5. Reverse procedure to install. SERVICE PROCEDU
Summary of the content on the page No. 12
VPX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS To adjust: 6. If necessary, tighten all screws an additional ½ turn and repeat step 5. 1. Reinstall the striker with the slot pointing upwards and "hand tighten" nut only. 7. Repeat step 6 until the door closes properly and no steam "leaks" are seen around the gasket 2. Close the door to center the striker in the oval seal. mounting hole. HEATING ELEMENT TEST 3. Open the door and check the strikers’ slot for horizontal alignment. The slot o
Summary of the content on the page No. 13
VPX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS AMPS PER ELEVATION TEMPERATURE KW PER OHMS PER ELEMENT VOLTAGE ELEMENT ELEMENT (FT) (°F) 1 PH 3 PH Sea Level 210 208 3 14.4 8.3 14.4 1,000 208 240 3 12.5 7.2 19.2 480 3 3.6 76.8 2,000 206 208 5 24.0 14.0 8.70 3,000 204 240 5 21.0 12.0 11.5 4,000 202 480 5 6.0 46.0 5,000 200 1. Values in the table are nominal. NOTES: 6,000 198 Tolerance is +5/-10%. 2. Voltage values are @ 60HZ. 7,000 196 3. Each heating element assembly 8,000 195 contains
Summary of the content on the page No. 14
VPX SERIES STEAMER - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Buzzer .................. Signals end of a "cook" cycle when cooking time expires. Contactor ............... Supplies line voltage to heating element assembly. Relay R1 ................ Supplies power to temperature control. Transformer ............. Provides 240V to the control circuit (480V only). Heater Light (green) ...... Indicates steamer is heating. Low Water Light (red) ..... Indicates additional water is r
Summary of the content on the page No. 15
VPX SERIES STEAMER - ELECTRICAL OPERATION 2) R1-3A & R1-3B return to N.O. SEQUENCE OF OPERATION position. a. Temperature control de- Wiring diagram 7264 will be used to explain the energized and internal relay electrical sequence of operation. contacts open. Timed Cooking Mode a) Contactor de-energized and power removed from heating 1. Conditions. elements. A. Steamer connected to correct voltage and 5. Set "cook" timer to desired time. is properly grounded. A. Timer contacts 1 & 3 close, timer
Summary of the content on the page No. 16
VPX SERIES STEAMER - ELECTRICAL OPERATION F. Door closed (door switch closed). G. Timer "off". H. Cooking compartment filled to the water level mark and below standby temperature of 168°F (+5/-8). 2. Select "continuous" on the cooking mode switch. A. Internal "pilot" light (top, amber) comes on. B. Internal "pilot" light (bottom, red) comes on. C. Relay "R1" energized. 1) R1-2A & R1-2B (both N.C.) open. 2) R1-3A & R1-3B (both N.O.) close. 3. Temperature control energized and evaluates input fro
Summary of the content on the page No. 17
VPX SERIES STEAMER - ELECTRICAL OPERATION WIRING DIAGRAMS 208-240V F25111 (March 2002) Page 17 of 20
Summary of the content on the page No. 18
VPX SERIES STEAMER - ELECTRICAL OPERATION 480V F25111 (March 2002) Page 18 of 20
Summary of the content on the page No. 19
VPX SERIES STEAMER - TROUBLESHOOTING TROUBLESHOOTING WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST. SYMPTOM POSSIBLE CAUSES Compartment leaks water around door. 1. Steamer not level. 2. Steamer overfilled. Steam leaks around door. 1. Worn gasket. See "DOOR" in "SERVICE PROCE
Summary of the content on the page No. 20
VPX SERIES STEAMER - CONDENSED SPARE PARTS LIST CONDENSED SPARE PARTS LIST VPX3 & VPX5 PART NUMBER DESCRIPTION NOTES 844385 Door Gasket (VPX5) 844196 Door Gasket (VPX3) 843811 Door Switch 853928 Thermostat - Temperature Control 853956 Thermostat - Standby 853948 Thermocouple Sensor, J-Type 853957 Fuse Block 851929 Fuse, 1Amp 250v (208/240v) 853270 Contactor (208/240v) 853493 High Limit Thermostat 844422 Power Switch (cooking mode switch) 853946 Element assy. 208v 9kW 853945 Element assy. 208v 1
