Vulcan VSX3E User Manual

MODEL VSX3E SHOWN

SERVICE MANUAL

VSX SERIES CONVECTION STEAMERS

(ELECTRIC AND GAS)

VSX3E ML-52396 VSX10EC ML-114824 VSX3E ML-52397 VSX10EO ML-114823 VSX4E ML-52398 VSX5G ML-114946 VSX5E ML-52399 VSX5GC ML-114947 VSX7EC ML-114822 VSX7GC ML-114949 VSX7EO ML-114821 VSX10GC ML-114949

- NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qu alif ied. If yo u have attend ed a Vulcan Service School for this product, you may be qualified to perform all the procedures described in this man ual.

Thi s manu al i s no t i nten ded to be al l en co mpassi ng . I f you have not atte nded a Vulca n Servic e School f or this produc t, you should read, in its entirety, the repair procedure you wish to perform to determine if you have the necessary tools, instruments and skills required to perform the procedure. Procedures for which you do not have th e n ecessary too ls, in strument s and skills should be performed b y a trained Vu lcan Service Technician.

Reproduction or other use of this Manual, without the express written consent of Vulcan, is prohibited.

A product of VULCAN-HART LO UISVILLE, KY 40201-0696 Form 24618 ( Rev.A, March 2000)

VSX SERIES STEAMERS

TABLE OF CONTENTS

GENERAL............................................................................. 3

Introduction ........................................................................ 3

Specifications ...................................................................... 4

Electric Steamers................................................................ 4

Gas Steamers .................................................................. 4

Tools ............................................................................. 5

Control Location..................................................................... 5

Water Conditi oning .................................................................. 5

REMOVAL AND REPLACEMENT OF PARTS ................................................. 6

Covers and Panels ................................................................... 6

Thermostats........................................................................ 7

Timer............................................................................. 9

Heating Elements (Electric) ............................................................ 9

Gas Solenoid Valve .................................................................. 9

Gas Pressure Regulator .............................................................. 11

Flam e S ense Pr obe ( Gas) ............................................................ 11

Water Level Control Board............................................................ 11

Hot Surface Ignitor (Gas)............................................................. 12

Gas Burner ....................................................................... 12

Gas Ignition Module ................................................................. 13

Steam G ener ator Tank .............................................................. 13

Water Level Probes ................................................................. 14

Fill and Cold W ater Solenoid Valv es .................................................... 15

Drain Valve ....................................................................... 16

Door............................................................................. 18

SERVICE PROCEDURES AND ADJUSTMENTS .............................................. 20

Steam G ener ator Cleaning ........................................................... 20

Delime Board Operation and Adjustm ent ................................................. 20

Control Thermostat Adjustment ........................................................ 20

Drain Tank M anually ................................................................ 21

Door Sealing Adjustment ............................................................. 22

Door Latch Adjustment............................................................... 22

Manifold Pressure Adjustment ......................................................... 23

Flam e S ense Pr obe ( Gas) ............................................................ 24

Hot Surface Ignitor (Gas)............................................................. 25

Heating Element (Electric)............................................................ 25

ELECTRICAL OPERATION .............................................................. 26

Component Func tion ................................................................ 26

Component Locat ion ................................................................ 28

Electric Models ................................................................. 28

Gas Models ................................................................... 29

Water Level Control Operation ........................................................ 30

Sequence of O per ation .............................................................. 30

Electric Models ................................................................. 30

Gas Models ................................................................... 32

Schematic Electric Steamers.......................................................... 34

Wiring Diagram Electric Steamers...................................................... 35

Schematic Gas Steamers ............................................................ 36

Wiring Diagram Gas Steamers ........................................................ 37

TROUBLESHOOTING .................................................................. 38

All Models ........................................................................ 38

Gas Models Only ................................................................... 40

Page 2 of 40

VSX SERIES STEAMERS -GENERAL

GENERAL

INTRODUCTION

General

This manual is applic able for all models listed on the cover page. Several models are pic tured below for reference.

Serial Numb er Break

Listed below, are t he beginning serial numbers for each model when the soli d state water level control (three probe design) was added.

MODEL SERIAL

VSX-3 AP100704-9Q-4565 VSX-4 AP1007141-9Q-4615 VSX-5 AP1007555-11Q-5522

Steam Cooking

Pressure-less steamers offer an ef ficient way to produce m any foods in smal l portions or l ar ger batches. Pressure-less, convection steam cooking will steam cook fresh foods or will steam defrost and cook frozen foods providing the maximum color, flavor and nutriti onal value with the least expenditure of energy and labor . The pressure-less steaming compartment allows the operator to open and close the door, anytime during a cooking cycle. The steam suppl y will shut off when the door is opened, then re-start when the door is closed.

VSX7EC

VSX7EO

Page 3 of 40

VSX5GC

VSX5G

VSX SERIES STEAMERS -GENERAL

SPECIFICATIONS

Model Designations

VSX3 - 3 pan unit.



VSX4 - 4 pan unit.



VSX5 - 5 pan unit.



VSX7 - Combi nation VSX3 and VSX4 unit.



VSX10 - Combi nation of two VSX5 units.



(based on 2.5 inch pan depth)

Electric Steamers

AMPERAGE

3 PHASE 1 PHASE

MODEL

TOTAL

208V 240V 480V 208V 240V

7.5 std. 20.9 18.1 9.0 36.1 31.3

VSX3E

10.0 opt. 27.8 24.1 12.1 48.1 41.7 VSX4E 10.0 27.8 24.1 12.1 48.1 41.7 VSX5E 15.0 41.6 36.2 18.1 72.2 62.5 VSX7E 17.5 48.7 42.2 21.1

VSX10E 30 83.2 72.4 36.2

Gas Steamers

INPUT

BTU/HR

MODEL NAT. PROP. NAT. PROP. RECOMMEND MIN RECOMMEND MIN

VSX5G 45,000 45,000 3.5 5.0 7.0 5.0 11.0 7.0 VSX5GC 45,000 45,000 3.5 5.0 7.0 5.0 11.0 7.0 180 1.5 VSX7GC 90,000 90,000 3.5 5.0 7.0 5.0 11.0 7.0 360 3.0

VSX10GC 90,000 90,000 3.5 5.0 7.0 5.0 11.0 7.0 360 3.0

MANIFOLD

PRESSURE

(INCHES W.C.)

NATURAL PROPANE

LINE PRESSURE

(INCHES W.C.)

MAX

14.0

LOAD (WATTS)

180 1.5

Water Supply

Supply pressure should be ........................ 20-80 psig



In line strainer f or suppl y line (Suppl ied)



Total dissolved solids (TDS)* .................... l ess than 60 ppm



Total alkalinity ........................................... less than 20 ppm



Silica ......................................................... less than 13 ppm



Chloride .................................................... less than 30 ppm



PH factor ................................................... 7 to 8



(*17.1 ppm = 1 grain of har dness)

AMPS (MAX)

120V 60HZ

Page 4 of 40

VSX SERIES STEAMERS -GENERAL

TOOLS

Standard

Standard set of hand tools.



VOM with an AC c ur r ent tester (any quality



VOM with a sensitivity of at least 20,000 ohm s per volt can be used). Gas leak checking equipment.



Special

CLR Treatm ent Kit (p/ n 817634) - Used to



remove Calci um/Lime/Rust from a steam generator tank.

CONTROL LOCAT ION

WATER CONDITIONING

Furnishing the steam generator with soft water to reduce scale formation is impor tant. Scal e formation will reduce steam out put, cause prematur e component failure, and shorten equipment life. Most water supplies contai n scale producing m inerals such as Calcium and M agnesi um. As steam is generated, the mineral s remain and dissolve into the water. As the concentration of these miner als increases past a certai n point, they pr ec ipitate from the water and coat the inside of t he tank, heating element s, thermostat bulbs and water lev el probes. Because of the high temperature of these surfaces, the precipitated m inerals bake onto them and become very difficult to remove.

This phenomenon c auses sev er al problem s:

1. Reduce the heat t r ansfer efficiency of t he heaters.

2. Cause premature failure of the heaters.

3. Water level probes will give false readings.

4. Thermostat bulbs will sense temperature incorrectly.

These problem s are common to any manufacturer's steamer regardless of design, but t hey c an all be prevented by furnishing the steam gener ator tank with soft water. Vulcan recommends the water contain l ess than 60ppm of “t otal dissolved solids” (TDS) and have a PH factor between 7 to 8. These water properties can be achieved by usi ng a properly maintai ned water softener.

Other chemical pr oper ties in water supplies can also affect good steam generation and vary fr om within each state and locality.

The water level probes in the steam generator tank use ions in the water to det ec t the water level.

not use

since it is "non conductive" and the water level can not be detected.

NOTE:

remove mi nerals from the water.

fully demi neralized or de- ionized water

The use of strainers, or fibers will not

(Gas Model Shown)

Therefor e, it i s recommended that a local water treatm ent speciali st be c onsul ted before the installation of any steam generating equipment.

Steamers that operate over a long peri od of time without the benefit of a water softener, which have developed a heavy scale build up, should be cleaned bef or e using a water softener.

Page 5 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

REMOVAL AND REPLACEMENT OF PARTS

COVERS AND PANELS

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

Right Side Panel

1. Remove screws from the bottom of the panel.

2. Sli de panel down to clear the top cover .

3. Rev er se proc edur e to install .

DISCONNECT THE ELECTRICAL

B. Remove the screws that secure the flue to

the tank and lift it off.

2. Push up on the rear of the cover and slide the top cover forward to c lear the f r ont edge.

3. Lift the cover off the cabi net.

4. Rev er se proc edur e to install .

Left Side and Rear Panel

1. Remove the top cover screws an disconnect t he utilities.

(Gas Model Shown)

Top Cover

1. Remove screws from the top rear of c over. If steamer i s a gas model, follow steps 1A and 1B.

A. Remove the screws at the base of the

exterior flue housing and lift of f.

Page 6 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

2. Remove the screws at the bott om of panel.

3. Remove the lower acc ess panels on the right and left side of the unit to gain ac cess to the lower compartment.

4. Remove the screws Inside the l ower compartment that run along the top rear of the base frame that secure the lip of the r ear panel.

replaced.

5. Remove screws that secure the thermostat.

NOTE:

base frame and the top li p of the small rear access panel.

5. Pull the combination left side and rear panel off.

6. Rev er se proc edur e to install .

Rear panel lip is “sandwiched” between the

THERMOSTATS

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

1. Turn “off” t he water suppl y and allow hot parts to cool down if necessary.

2. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

3. Manuall y drain the steam gener ator tank if necessary, as outlined in "DRAIN TANK MANUALLY”.

DISCONNECT THE ELECTRICAL

6. If r eplacing the control thermostat, fully loosen the compression nut, slidi ng it away from tank, then remove the bul b.

NOTE:

thermostat calibration and/or damage to therm ostat may occur.

When installing, do not over tighten as

4. Disconnect t he lead wires from thermostat being

Page 7 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

7. If r eplacing the high limit ther mostat: A.

Electric Mo dels

1) Remove nut on capillary tube hold down clamp.

2) Fully loosen the small capillary tube compression nut and sl ide it away f r om heater.

3) Remove large capillary nut from heater base plate and slide it away from heater.

5) Pull the bulb from its holding sleeve and remove from the heater.

Gas Model s

1) Remove t he nuts securing the thermostat to the tank surface plate and lift it off.

4) Remove t he r emaining nuts that secure heater to the t ank and pull heater out just enough to ex pose t he holding sleeve on the element and the bulb.

NOTE:

wires together so the heating element c an be pulled out without disconnecting the lead wires.

Cut the wire ties holding the heat er lead

8. Rev er se the procedure to install the new thermostat and check for pr oper oper ation as outlined under "CONTROL THE RM OSTAT ADJUSTMENT".

Page 8 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

TIMER

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Pull timer knob from shaft.

3. Disconnect lead wires to timer.

4. Remove nut from timer shaft and remove timer from the unit.

DISCONNECT THE ELECTRICAL

5. Remove the nuts that secur e the heater to the tank and remove the heat er from the unit.

6. Rev er se proc edur e to install .

5. Rev er se the procedure to install.

HEATING ELEMENTS

(ELECTRIC)

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

1. Turn “off” t he water suppl y and allow hot parts to cool down if necessary.

2. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

3. Manuall y drain steam generator tank if necessary, as outlined under " DRA IN TANK MANUALLY".

4. Disconnect t he heater lead wires and rem ove the high limit thermostat bulb fr om heater as outlined under “THERMOSTATS”.

DISCONNECT THE ELECTRICAL

GAS SOLENOID VALVE

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING:

BEFORE SERVICING THE UNIT.

WARNING:

DURING SERVI CING MUST BE CHECK E D FOR LEAKS. CHECK USING A SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME.

A. BEFORE LIG HTING UNIT, CHECK ALL

B. CHECK ALL JOINTS BEYOND GAS

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Cut the wire t ies around “wire bundle” and trac e the solenoid wires to remove.

DISCONNECT THE ELECTRICAL

SHUT OFF THE GAS SUPPLY

ALL GAS JOINTS DISTURBED

JOINTS PRIOR TO THE GAS VALVE (SOLENOID).

VALVE (SOLENOID) AFTER THE UNIT HAS LIT.

there terminati ons and

Page 9 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

3. Loosen the compression nuts on the flexible gas line then r emove line from the gas solenoid valve and manif old.

B. Loosen the compression nuts on the

“condenser feed” and “tank feed” water lines and place the l ines to the side.

NOTE:

compression nut on the “cold water condenser” solenoid and rotate it out of the way.

6. Open the l ower cabinet base door to gain

If necessary, loosen the remai ning

access the gas solenoid valves.

(VSX5G SHOWN)

4. If r emov ing gas val ve from a single unit, proceed to step 5. If rem oving gas solenoid valve from a double unit, proc eed to step 6.

5. Turn “off” t he water suppl y to the “tank fill ” and “cold water condenser” solenoi ds and disconnect the fittings (bulkhead uni on) on the

opposite end

connections. A. To access the compression fitt ings for the

incoming water connecti on, remove the small access panel to the lower compartment.

of the incoming water

7. Remove the gas solenoid valve f r om the pipe

8. Rev er se proc edur e to install and c hec k unit for

Page 10 of 40

nipple bel ow i t.

proper operati on.

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

GAS PRESSURE REGULATOR

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING:

BEFORE SERVICING THE UNIT.

WARNING:

DURING SERVI CING MUST BE CHECK E D FOR LEAKS. CHECK USING A SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME.

A. BEFORE LIG HTING UNIT, CHECK ALL

B. CHECK ALL JOINTS BEYOND GAS

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Remove the gas solenoid valve as outline under “GAS SOLENOID VALVE”.

3. Remove the gas pressure regulator from the pipe nippl e below it.

DISCONNECT THE ELECTRICAL

SHUT OFF THE GAS SUPPLY

ALL GAS JOINTS DISTURBED

JOINTS PRIOR TO THE GAS VALVE (SOLENOID).

VALVE (SOLENOID) AFTER THE UNIT HAS LIT.

FLAME SENSE PROBE (GAS)

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING:

BEFORE SERVICING THE UNIT.

1. Cut the wire t ies around “wire bundle” and trac e the Flame Sense Probe (FSP) wir e to an in-line splice (but t connector) and cut the wire close to the connector.

2. Remove the screw holdi ng the flame sense probe onto the m ounting bracket and lif t out.

3. Rev er se the procedure to install a new probe then check FSP for proper oper ation as outli ned under “FLAME SENSE PROBE”.

NOTE:

have t o be c ut close to the connec tor and the wire insulation stripped back approximately 0.250 i nc h to install a new connector.

DISCONNECT THE ELECTRICAL

SHUT OFF THE GAS SUPPLY

The opposite end of the in-line splice will

WATER LEVEL CONTROL

BOARD

4. Rev er se the procedure to install.

5. Adjust the gas regulator pressure as outlined under “MANIFOLD PRESSURE ADJUSTMENT”.

6. Check unit for proper operation.

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Disconnect t he lead wires from the water level control board (WLC) .

3. Remove mount ing screws.

4. Move board to the left and rotate outwards when removing, t o clear wire bundle.

5. Rev er se the procedure to install, then chec k unit for proper operation.

DISCONNECT THE ELECTRICAL

Page 11 of 40

VSX SERIES STEAMER - REMOVAL AND REPLACEMENT OF PARTS

HOT SURFACE IGNITOR (GAS)

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING:

BEFORE SERVICING THE UNIT.

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Cut the wire t ies around “wire bundle” and trac e the wire for the Hot Surface Ignit or ( HS I) to an in-line splice (but t connector) and cut the wire off close to the connector.

3. Remove the screw that holds the flame sense probe and ground terminal wire ont o the mounti ng bracket and lift out .

4. Rev er se the pr ocedure to instal l then check HSI for proper operation as outlined under “HOT SURFACE IGNITOR”.

DISCONNECT THE ELECTRICAL

SHUT OFF THE GAS SUPPLY

GAS BURNER

WARNING:

POWER TO T HE MACHINE AT THE MAIN CIRCUIT BO X. P LA CE A TAG ON THE CI RCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

1. Remove the ri ght side panel as outlined under "COVERS AND PANELS".

2. Remove the screws securing the burner mounti ng bracket to the bur ner box frame.

3. Sli de the burner for ward enough to c lear the gas nozzles and lift it out.

DISCONNECT THE ELECTRICAL

NOTE:

have t o be c ut, close to t he c onnec tor and the wire insulation stripped back approximately 0.250 i nc h to install a new connector.

The opposite end of the in-line splice will

4. Remove the screws securing the burners to the mounti ng bracket and lift t he bur ner s off.

5. Rev er se proc edur e to install then check for proper operati on.

NOTE:

sure burner flame is not impinging on the opening of the burner box.

When c hec king for pr oper oper ation, m ak e

Page 12 of 40

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