Vulcan Hart VSX36E Service Manual

FOOD STEAMERS

MODEL

INSTALLATION,

OPERATION, SERVICE &

PARTS MANUAL

VSX24G ML-52163
VSX36G ML-52360
VSX42GT ML-52832
VSX24E ML-52164
VSX36E ML-52829
VSX42ET ML-52833
VSX24D ML-52827
VSX36D ML-52830
VSX42DT ML-52834
VSX36R ML-52831
VSX42RT ML-52835

MODEL VSX24

VULCAN-HART COMPANY, P.O. BOX 696, LOUISVILLE, KY 40201-0696, TEL. [phone]

FORM 30798 (Rev. A, 10-95)

2

IMPORTANT FOR YOUR SAFETY

THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS
EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND
ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.

POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER.

IMPORTANT

IN THE EVENT A GAS ODOR IS DETECTED, SHUT
DOWN UNITS AT MAIN SHUTOFF VALVE AND
CONTACT THE LOCAL GAS COMPANY OR GAS
SUPPLIER FOR SERVICE.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS IN THE
VICINITY OF THIS OR ANY OTHER APPLIANCE.

WARNING

IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE CAN
CAUSE PROPERTY DAMAGE, INJURY OR DEATH.
READ THE INSTALLATION, OPERATING AND
MAINTENANCE INSTRUCTIONS THOROUGHLY
BEFORE INSTALLING OR SERVICING THIS
EQUIPMENT.

IN THE EVENT OF A POWER FAILURE, DO NOT
ATTEMPT TO OPERATE THIS DEVICE.

3

INSTALLATION, OPERATION, SERVICE & PARTS MANUAL
CONVECTION FOOD STEAMERS
GAS, ELECTRIC, REGENERATIVE OR DIRECT STEAM
MODELS VSX24, VSX36 & VSX42 INDEX

PLEASE KEEP THIS MANUAL FOR FUTURE REFERENCE

Your Vulcan Steam Cooker is produced with quality
workmanship and material. Proper installation, usage
and maintenance of your steam cooker will result in
many years of satisfactory performance.

The manufacturer suggests that you thoroughly read
this entire manual and carefully follow all of the instruc­tions provided.

DESCRIPTION PAGE

INDEX 4, 5

INSTALLATION 6

UNPACKING 6

LOCATION 6

INSTALLATION CODES AND STANDARDS 6, 7

LEVELING AND ANCHORING 7

SERVICE CONNECTIONS 7-19

Steam Connections 7

Gas Connections 7

Electrical Connections 8

Drain Connections 8

Plumbing Connections 8

VENT HOOD 8

SERVICE CONNECTION DIAGRAMS 9-19

START-UP TEST RUN 20, 21

BLOW DOWN BOILER 21

OPERATION 22

CONTROLS - CABINET BASE GENERATOR 22, 23

CONTROLS - COMPARTMENT 24

LIGHTING STANDING PILOT (GAS BASE GENERATORS ONLY) 24

4

DESCRIPTION PAGE

OPERATION (CONT’D.)

OPERATING STEAMERS WITH INTERMITTENT PILOTS (GAS BASE GENERATORS ONLY) 24, 25

DAILY STARTING PROCEDURE 25

CLEANING 25, 26

MAINTENANCE 26

COOKING CHART 27-29

TROUBLESHOOTING 30-32

SERVICE 33

COOKING COMPARTMENT 33

CABINET BASE GENERATOR 33-38

All Generators 33-37

Gas Generators 37, 38

Electric Generators 38

Regenerating (Steam Coil) Generators 38

REPLACEMENT PARTS LIST 39-70

5

INSTALLATION

UNPACKING

This steam cooker was inspected before leaving the
factory. The transportation company assumes full
responsibility for safe delivery upon acceptance of the
shipment. Immediately after unpacking, check for
possible shipping damage. If the cooker is found to be
damaged after unpacking, save the packaging material
and contact the carrier within 15 days of delivery.

Before installing, verify that the gas (natural or propane)
and/or electrical supplies agree with the specifications
on the rating plate which is located on the inside base
cabinet door. If the supply and equipment requirements
do not agree, do not proceed with the installation.
Contact your dealer or Vulcan-Hart immediately.

LOCATION

Position the steamer in its final location. Check that
there are sufficient clearances to service the controls,
for door swings, etc., so there will be no problem in
making the required supply and drain connections.
Recommended clearances are 18" on the sides and
back and 36" in the front.

The steamer must be installed so that the flow of
combustion and ventilation air will not be obstructed.
Adequate clearance for air openings into the combustion
chamber of the gas cabinet base generator must be
provided. The floor area beneath the burners must be
kept free and clear. Make sure there is an adequate
supply of air in the room to allow for combustion of the
gas at the burners.

When steamers are mounted on casters, you must use
a connector that complies with the Standard for
Connectors of Movable Gas Appliances, ANSI-Z21.69
(latest edition), and a quick-disconnect device that
complies with the Standard for Quick-Disconnect
Devices for Use With Gas Fuel, ANSI-Z21.41 (latest
edition).

Provide a gas line strain relief to limit movement of the
steamer without depending on the connector and/or any
quick-disconnect device or its associated piping to limit
movement of the steamer. Attach the gas line strain
relief to the rear of the steamer (Fig. 1).

Allow enough space between any other piece of
equipment or a wall for access. All service on the
compartment controls begins by removing the panel on
the right side of the compartments. Service on the
cabinet base may require the removal of the panel on
either or both the left or right sides.

A floor drain (open gap) is required immediately below
the steamer drain.

An exhaust system should be located directly above
the steamer to exhaust steam and heat generated by
the steamer.

For Gas Powered Steam Generators Only

The equipment area must be kept free and clear of
combustible substances.

The steamer, when installed, must have a minimum
clearance from combustible and noncombustible
construction of 6" at the sides and 6" at the back. It
must be installed on a noncombustible floor. The
installation location must allow adequate clearances
for servicing and proper operation.

1/2 IN. DIA. HOLE
PROVIDED FOR
STRAIN RELIEF

Should it be necessary to disconnect the restraint, turn
off the gas supply before disconnection. Reconnect the
restraint before turning the gas supply on and returning
the steamer to its installation position.

INSTALLATION CODES AND STANDARDS

Your Vulcan steamer must be installed in accordance
with:

PL-51218

6

In the United States:

STEAM CONNECTIONS

1. State and local codes.

2. National Fuel Gas Code, ANSI-Z233.1 (latest
edition). Copies may be obtained from The
American Gas Assoc., Inc., 1515 Wilson Blvd.,
Arlington, VA 22209.

3. National Electrical Code, ANSI/NFPA No. 70 (latest
edition). Copies may be obtained from The
National Fire Protection Assoc., Batterymarch Park,
Quincy, MA 02269.

In Canada:

1. Local codes.

2. CAN/CGA-B149.1 Installation for Natural Gas
Burning Appliances and Equipment (latest edition).

3. CAN/CGA-B149.2 Installation for Propane Burning
Appliances and Equipment (latest edition). Copies
may be obtained from The Canadian Gas Assoc.,
55 Scarsdale Road, Don Mills, Ontario, Canada
M3B 2R3.

Provide dry steam to the inlets. If the steam is heavy
with condensate, install a ball float trap before the
pressure regulator valve. To ensure rapid heat-up of
heavy cold loads, the steam supply line must be sized
to maintain pressure and flow as follows:

Direct Connected Steamers (Fig’s. 2-4)

Supply steam at a pressure of 10-12 psi and at a
minimum flow rate of 50 lb. per hour per compartment.
A pressure reducing valve is furnished and set at 10 psig.
Additional steam kettles and kettle modules can
be interconnected to the steamer. Consult Vulcan-Hart
for recommendations.

Regenerating (Steam Coil) Generators (Fig’s. 5 & 6)

The steam supply to the steam coils must be 15 psi at
a minimum flow rate of 125 lb. per hour to the coil.

GAS CONNECTIONS (Fig’s. 7, 8 & 9)

All gas supply connections and any pipe joint
compound used must be resistant to the action of
propane gases.

4. The Canadian Electrical Code, Part 1, C22.1 (latest
edition). Copies may be obtained from the
Canadian Standards Assoc., 178 Rexdale Blvd.,
Rexdale, Ontario, Canada M9W 1R3.

LEVELING AND ANCHORING

Using a spirit level, adjust the feet to level the steamer
left-to-right and front-to-back. Steamers should be
elevated in the front just enough (about 1/16" to 1/8") to
give proper drainage. To do this, rotate rear leg
adjusting nut by 1 to 11⁄2 turns clockwise after leveling.
(Check by pouring a little water in the compartment; all
the water should drain.)

The rear feet have holes in the flanges for anchor bolts.
DIRECT STEAM COOKERS (STEAMERS WITHOUT
GENERATORS) MUST BE ANCHORED TO THE
FLOOR.

SERVICE CONNECTIONS (See Fig’s. 2-12)

Connect gas supply to the gas cabinet base generator
using 3⁄4” pipe. Make sure the pipes are clean and free
of obstructions.

Codes require that a gas shutoff valve be installed in
the gas line ahead of the steam generator.

This gas cabinet base generator is equipped with fixed
orifices for use with natural or propane gas and no
adjustment is necessary.

The gas line must be capable of delivering gas to the
generator without excessive pressure drop at the rate
specified on the rating plate. The generator is equipped
with a factory preset pressure regulator. Natural gas
pressure regulators are preset for 3.5" W.C. (Water
Column) for natural gas. Propane gas pressure
regulators are preset for 10" W.C. No further adjustment
should be required.

WARNING: PRIOR TO LIGHTING, CHECK ALL
JOINTS IN THE GAS SUPPLY LINE FOR LEAKS.
USE SOAP AND WATER SOLUTION. DO NOT USE
AN OPEN FLAME.

After piping has been checked for leaks, all piping
receiving gas should be fully purged to remove air.

7

Testing The Gas Supply System

1

When test pressures exceed

⁄2 psig (3.45 kPa), the
generator and its individual shutoff valve must be
disconnected from the gas supply piping system.

When test pressures are 1⁄2 psig (3.45 kPa) or less, the
generator must be isolated from the gas supply system
by closing its individual manual shutoff valve.

DRAIN CONNECTIONS (Fig’s. 2-12)

Drain connections must be the open air gap type.
Provide a suitable drain under the drain pipes. For
proper drainage, a floor sink with minimum of 12" depth
is recommended.

CAUTION: In order to avoid any back pressure in
the steamer, do not connect solidly to any drain
connection.

ELECTRICAL CONNECTIONS (Fig’s. 2-12)

WARNING: ELECTRICAL AND GROUNDING

CONNECTIONS MUST COMPLY WITH THE
APPLICABLE PORTIONS OF THE NATIONAL
ELECTRICAL CODE ANSI/NFPA-70 (LATEST
EDITION) AND/OR OTHER LOCAL ELECTRICAL
CODES.

WARNING: DISCONNECT ELECTRICAL POWER
SUPPLY AND PLACE A TAG AT THE DISCONNECT
SWITCH TO INDICATE THAT YOU ARE WORKING
ON THE CIRCUIT.

Do not connect the steamer to electrical supply until
after gas connections (if applicable) have been made.

All Models

Unless otherwise specified, field wire electrical
connection is to be 120 volts, 60 Hertz, single phase,
with grounding wire. Connect electrical supply to the
pigtail leads in the supply junction box located next to
the boiler control box for electric generators in a 24"
wide base, and under the boiler control box for all other
generator bases. The supply junction box is located on
the underside of the cabinet top on direct steam
models. Use copper wire suitable for at least 75°C
temperature. A grounding wire must be connected to
the ground lug in the junction box.

When optional step down transformer is used on
electrically heated generators, the 120 volt connection
is not required.

PLUMBING CONNECTIONS (Fig’s. 2-12)

WARNING: PLUMBING CONNECTIONS MUST

COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.

Before connecting the steamer to water, the water
supply should be analyzed to make sure hardness is
less than 2.0 grains per gallon and pH of 7.5. The water
supply should be clear with no sediment or suspended
material present. If the water supply fails to meet these
standards, it will be necessary to install a water
conditioner on the boiler water feed. APPLIANCE
FAILURE CAUSED BY INADEQUATE WATER
QUALITY IS NOT COVERED UNDER WARRANTY.

The use of strainers or filters will not remove minerals
from the water.

Cold Water

Used as boiler fill water and cold water condenser on
boiler blowdown line. Connect a

1

⁄4” N.P.T. cold water condensor line. Twenty (20) psig

cold water line to the

minimum water pressure is required at the connections.

VENT HOOD

Information on the construction and installation of
ventilating hoods may be obtained from the standard
for “Vapor Removal from Cooking Equipment,” NFPA
No. 96 (latest edition).

Electrically Heated Generators

Make the electrical supply connection in the junction
box on the contactor box. The supply wiring and circuit
protection must be adequate for the kilowatt load drawn
by the cooker. A grounding wire must be connected to
the ground lug in the junction box. Use copper wire of
the size and temperature rating marked on the supply
label.

8

SERVICE CONNECTIONS
DIRECT STEAM, VSX24D FIG. 2

LEGEND

A. COLD SUPPLY WATER CONNECTION:

CONDENSER SUPPLY, AND BOILER FEED.

B. STEAM SUPPLY CONNECTION:

PRESSURE REDUCING VALVE IS MOUNTED AS STANDARD AND SET FOR 10
PSI MAXIMUM INPUT TO UNIT).

C. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

D. DRAIN: COPPER TUBE COMPARTMENT & EXHAUST GROUP APPROXIMATELY

2" IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER THE UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

3

⁄4” NPT FOR STEAM COOKING (A STEAM

1

⁄4” TUBING FOR COLD WATER

9

SERVICE CONNECTIONS
DIRECT STEAM, VSX36D FIG. 3

LEGEND

A. COLD SUPPLY WATER CONNECTION:

CONDENSER, AND BOILER FEED.

B. STEAM SUPPLY CONNECTION:

PRESSURE REDUCING VALVE IS MOUNTED AS STANDARD AND SET FOR
10 PSI MAXIMUM INPUT TO UNIT.)

C. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

D. DRAIN: COPPER TUBE COMPARTMENT & EXHAUST GROUP APPROXIMATELY

2" DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY UNDER
UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

3

⁄4” NPT FOR STEAM COOKING. (A STEAM

1

⁄4” TUBING FOR COLD WATER

10

SERVICE CONNECTIONS
DIRECT STEAM, VSX42DT FIG. 4

LEGEND

A. COLD SUPPLY WATER CONNECTION:

CONDENSER, AND BOILER FEED.

B. STEAM SUPPLY CONNECTION:

PRESSURE REDUCING VALVE IS MOUNTED AS STANDARD AND SET FOR
10 PSI MAXIMUM INPUT TO UNIT.)

C. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

D. DRAIN: COPPER TUBE COMPARTMENT & EXHAUST GROUP APPROXIMATELY

2" DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY UNDER
UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

3

⁄4” NPT FOR STEAM COOKING. (A STEAM

1

⁄4” TUBING FOR COLD WATER

11

SERVICE CONNECTIONS
REGENERATING STEAM, VSX36R FIG. 5

LEGEND

A. STEAM SUPPLY CONNECTION:

STEAM PRESSURE REDUCING VALVE IS SHIPPED WITH THE UNIT AND
MUST BE FIELD INSTALLED AND ADJUSTED FOR 15 PSI MAXIMUM TO THE
UNIT.)

B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

C. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

2" IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

D. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS, AND BOILER FEED.

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3" (±75MM). NORMAL DIMENSIONS ARE IN INCHES. DIMENSIONS
IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

3

⁄4” NPT FOR STEAM INLET TO BOILER. (A

1

⁄4” NPT FOR BOILER DRAIN &

12

SERVICE CONNECTIONS
REGENERATING STEAM, VSX42RT FIG. 6

LEGEND

A. STEAM SUPPLY CONNECTION:

STEAM PRESSURE REDUCING VALVE IS SHIPPED WITH THE UNIT AND
MUST BE FIELD INSTALLED AND ADJUSTED FOR 15 PSI MAXIMUM TO THE
UNIT.)

B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

C. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

2" IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

D. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS, AND BOILER FEED.

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3" (± 75MM). NORMAL DIMENSIONS ARE IN INCHES. DIMENSIONS
IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

3

⁄4” NPT FOR STEAM INLET TO BOILER. (A

1

⁄4” NPT FOR BOILER DRAIN &

13

SERVICE CONNECTIONS
GAS HEAT, VSX24G FIG. 7

LEGEND

A. GAS CONNECTION:
B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

C. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

D. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS, AND BOILER FEED.

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

3

⁄4” NPT.

1

⁄4” NPT FOR BOILER DRAIN &

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 6 IN. MIN. (150 MM.)
LEFT SIDE: 6 IN. MIN. (150 MM.)
RIGHT SIDE: 6 IN. MIN. (150 MM.)

14

SERVICE CONNECTIONS
GAS HEAT, VSX36G FIG. 8

LEGEND

A. GAS CONNECTION:
B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

C. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

D. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS, AND BOILER FEED.

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

3

⁄4” NPT.

1

⁄4” NPT FOR BOILER DRAIN &

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 6 IN. MIN. (150 MM.)
LEFT SIDE: 6 IN. MIN. (150 MM.)
RIGHT SIDE: 6 IN. MIN. (150 MM.)

15

SERVICE CONNECTIONS
GAS HEAT, VSX42GT FIG. 9

LEGEND

A. GAS CONNECTION:
B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (FOR
OTHER THAN 120 VOLT SUPPLY CONSULT FACTORY FOR LOCATION OF
THIS CONNECTION.)

C. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

D. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS, AND BOILER FEED.

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

3

⁄4” NPT.

1

⁄4” NPT FOR BOILER DRAIN &

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 6 IN. MIN. (150 MM.)
LEFT SIDE: 6 IN. MIN. (150 MM.)
RIGHT SIDE: 6 IN. MIN. (150 MM.)

16

SERVICE CONNECTIONS
ELECTRIC HEAT, VSX24E FIG. 10

LEGEND

A. JUNCTION BOX: J.I.C. 6X6X4 FOR ELECTRICAL SUPPLY CONNECTION FOR

HEAT.

B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (NOT
PROVIDED IF A STEP DOWN TRANSFORMER IS FURNISHED.)

C. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS.

D. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

1

⁄4” NPT FOR BOILER DRAIN AND

17

SERVICE CONNECTIONS
ELECTRIC HEAT, VSX36E FIG. 11

LEGEND

A. JUNCTION BOX: J.I.C. 6X6X4 FOR ELECTRICAL SUPPLY CONNECTION FOR

HEAT.

B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (NOT
PROVIDED IF A STEP DOWN TRANSFORMER IS FURNISHED.)

C. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS.

D. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

1

⁄4” NPT FOR BOILER DRAIN AND

18

SERVICE CONNECTIONS
ELECTRIC HEAT, VSX42ET FIG. 12

LEGEND

A. JUNCTION BOX: J.I.C. 6X6X4 FOR ELECTRICAL SUPPLY CONNECTION FOR

HEAT.

B. ELECTRICAL CONNECTION FOR CONTROLS: 120V/60HZ/1PH/300 WATT

MAXIMUM, POWER SUPPLY WITH GROUNDING WIRE REQUIRED. (NOT
PROVIDED IF A STEP DOWN TRANSFORMER IS FURNISHED.)

C. COLD SUPPLY WATER CONNECTION:

COMPARTMENT DRAIN COLD WATER CONDENSERS.

D. DRAIN: COMPARTMENT, BOILER AND EXHAUST GROUP APPROXIMATELY

1

3

⁄2” IN DIAMETER. (PROVIDE AN OPEN AIR GAP TYPE DRAIN DIRECTLY
UNDER UNIT FRAME. DO NOT CONNECT SOLIDLY TO ANY DRAIN
CONNECTION.)

NOTE: DIMENSIONS WHICH LOCATE THE ABOVE CONNECTIONS HAVE A
TOLERANCE OF ± 3 IN. (± 75 MM). NORMAL DIMENSIONS ARE IN INCHES.
DIMENSIONS IN ( ) ARE IN MILLIMETERS.

EQUIPMENT CLEARANCES
TO COMBUSTIBLE CONSTRUCTION

REAR: 2 IN. MIN. (50 MM.)

1

⁄4” NPT FOR BOILER DRAIN AND

19

START-UP TEST RUN

After the appliance is installed and proper service
connections have been made, thoroughly test the
steam cooker before operation.

8. When timer knobs are on “0”, each buzzer will
sound, steam generation will cease, COOKING
lights will go off and READY lights will come on.
To silence buzzers, turn timer knobs to OFF
position.

Gas Powered Steam Generator

1. Open manual gas shutoff valve, and if the
appliance has a manual blowdown valve, close it.
Open left cabinet door and turn water fill and power
switch ON. The red light will come on and water
will fill boiler to the required level in about 15
minutes. Observe water level gauge glass to
verify. Both valves on gauge glass assembly must
be open.

2. The dial on the gas combination control valve has
three positions (On-Pilot-Off) for manual gas control
of main burners and pilot. Turn dial on gas
combination valve to PILOT. Depress dial and light
pilot burner; maintain dial in depressed position for
about 30 seconds and release. Observe that pilot
burner flame stays on. If the flame should go out,
wait 5 minutes before relighting.

3. Turn gas combination control valve dial to ON and
burners will ignite. Steam generation will begin and
be completed in about 15 minutes. Observe that
the boiler pressure gauge indicates steam pressure
in the range of 9-12 psi (9-13 psi if a kettle is
connected to the steamer).

9. During simulation of cooking cycle, burners will
cycle on and off to maintain steam pressure in
boiler.

10. Turn power switch OFF. Amber light will go out.

11. Blow down boiler (see BLOW DOWN BOILER in
this manual).

Electrically Powered Steam Generator

1. If steamer has a manual blowdown valve, close it.
Open left cabinet door and turn power switch ON.
Water will fill boiler to the required level in about 15
minutes. Observe water level gauge glass to
verify. Both valves on gauge glass assembly must
be open. Steam generation will begin and be
completed in about 15 minutes.

2. Set both timer knobs to “0”. Open both
compartment doors and observe that no steam has
entered the cooking compartments. Close doors.

3. Set both timer knobs to 2 minutes. READY lights
will go off, COOKING lights will come on, and
steam will be heard entering the compartments.

4. Set both timer knobs to “0”. Open both
compartment doors and observe that no steam has
entered the cooking compartments. Close doors.

5. Set both timer knobs to 2 minutes. The READY
lights will go off, the COOKING lights will come on,
and steam will be heard entering the
compartments.

After one minute, open each door and observe that
steam has ceased to enter each compartment, but
COOKING lights and cooking times at “01” are
maintained.

WARNING: THE COOKING COMPARTMENTS
CONTAIN LIVE STEAM. STAY CLEAR WHILE
OPENING EACH DOOR.

7. Close doors. Steam generation and cook times will
resume. Observe appliance drain that live steam
from compartments is being cooled by cold water
from the cold water solenoid valve.

After one minute, open each door and observe that
steam has ceased to enter each compartment, but
COOKING lights and cooking times at “01” are
maintained.

WARNING: THE COOKING COMPARTMENTS
CONTAIN LIVE STEAM. STAY CLEAR WHILE
OPENING EACH DOOR.

4. Close doors. Steam generation and cook times will
resume. Observe appliance drain that live steam
from compartments is being cooled by cold water
from the cold water solenoid valve.

5. When timer knobs are on “0”, each buzzer will
sound, steam generation will cease, COOKING
lights will go off and READY lights will come on.
To silence buzzers, turn timer knobs to OFF
position.

6. During simulation of cooking cycle, the heating
elements will cycle on and off to maintain steam
pressure in the boiler.

20

7. Turn power switch OFF. Amber light will go out.

8. Blow down boiler (see BLOW DOWN BOILER in
this manual).

Direct Steam Powered Cooker

1. Set both timer knobs to “0”. Open both
compartment doors and observe that no steam has
entered cooking compartments. Close doors.

2. Set both timer knobs to 2 minutes. READY lights
will go off, COOKING lights will come on, and
steam will be heard entering the compartments.

After one minute, open each door and observe that
steam has ceased to enter each compartment, but
COOKING lights and cooking times at “01” are
maintained.

WARNING: THE COOKING COMPARTMENTS
CONTAIN LIVE STEAM. STAY CLEAR WHILE
OPENING EACH DOOR.

3. Close doors. Steam generation and cook times will
resume. Observe appliance drain that live steam
from compartments is being cooled by cold water
from the cold water solenoid valve.

4. When timer knobs are on “0”, each buzzer will sound,
steam generation will cease, COOKING
lights will go off and READY lights will come on.
To silence buzzers, turn timer knobs to OFF
position.

Regenerative Steam Powered Generator

1. If the steamer has a manual blowdown valve, close
it. Turn power switch ON. Water will fill the boiler
to the required level in about 15 minutes. Observe
water level gauge glass to verify. Both valves on
gauge glass assembly must be open. Steam
generation will begin and be completed in about 15
minutes.

2. Set both timer knobs to “0”. Open both
compartment doors and observe that no steam has
entered the cooking compartments. Close doors.

3. Set both timer knobs to 2 minutes. READY lights
will go off, COOKING lights will come on, and
steam will be heard entering the compartments.

After one minute, open each door and observe that
steam has ceased to enter each compartment, but
COOKING lights and cooking times at “01” are
maintained.

WARNING: THE COOKING COMPARTMENTS
CONTAIN LIVE STEAM. STAY CLEAR WHILE
OPENING EACH DOOR.

4. Close doors. Steam generation and cook times will
resume. Observe appliance drain that live steam
from compartments is being cooled by cold water
from the cold water solenoid valve.

5. When timer knobs are on “0”, each buzzer will
sound, steam generation will cease, COOKING
lights will go off and READY lights will come on.
To silence buzzers, turn timer knobs to OFF position.

6. During simulation of cooking cycle, steam coils will
cycle on and off to maintain steam pressure in the
boiler.

7. Turn power switch OFF. Amber light will go out.

8. Blow down boiler (see BLOW DOWN BOILER in
this manual).

BLOW DOWN BOILER

Always blow down boiler when boiler is under maximum
pressure and no steam is being used.

Automatic Blowdown

Turn power switch OFF. Depress blowdown button.
Blowdown timer will operate for 4 minutes. At end of
blowdown, turn fill switch to ON and allow boiler to fill.

Manual Blowdown

Turn power switch OFF. Open blowdown valve. After
boiler has drained completely, close blowdown valve
and turn fill switch to ON and allow boiler to fill.

21

OPERATION

WARNING: THE STEAMER AND ITS PARTS ARE

HOT. USE CARE WHEN OPERATING, CLEANING
OR SERVICING THE STEAMER. THE COOKING
COMPARTMENTS CONTAIN LIVE STEAM. STAY
CLEAR WHILE OPENING EACH DOOR.

CONTROLS — CABINET BASE GENERATOR (Fig. 13)

Handhole Cover Assembly — when unbolted and

removed, allows internal examination and cleaning of
boiler if required.

Water Level Gauge Assembly — permits visual
confirmation that water level is being maintained in the
boiler during operation. The correct water level is a
point one-half of the height of the glass. The manual
valves at the top and bottom of this assembly must be
fully open, and only closed if the glass tube should be
damaged.

Observe that the water is clean and clear in the
glass tube. The appearance of extreme murkiness
in the water indicates inadequate water quality and
will cause failure of controls and the steamer.
Warranty does not cover malfunction due to poor
water conditions. Blow down and/or clean the
generator.

Pilot Burner (Gas Base Generator Only) — should
remain lit at all times unless the steamer will not be in
use for an extended period of time. If at any time the
flame goes out, wait 5 minutes before relighting.

Drain Solenoid Valve — a quick acting drain valve
provided for daily blowdown of the generator.

Strainers — a strainer is used in the water inlet line to
prevent foreign matter from becoming lodged in the
inlet solenoid valve. A “Y” strainer is inserted upstream
of the drain solenoid valve to allow the valve to operate
smoothly. A strainer is used in the pressure regulating
valve on models using direct steam supply.

Boiler Fill Solenoid Valve — admits water to the
boiler when demanded by the automatic fill controls in
order to maintain the correct water level in the steam
generator.

Blowdown Drain CWC Solenoid Valve — allows cold
water to flow to boiler blowdown drain and helps cool
the boiler water prior to its discharge into the drain.

Cycling Pressure Switch — controls boiler pressure
between prescribed limits by turning the heat source on
and off. A back-up switch of identical design is provided
and has a higher high setting and a lower low setting
than the primary control.

Power Switch — when turned ON will automatically
begin the steam generating process in the boiler. The
power switch is fastened to the front face of the
generator control box.

Pressure Regulating Valve — used to control
manifold steam pressure at 10-12 psi on models using
direct steam supply.

Main Burners (Gas Base Generator Only) — cycle
on and off to maintain steam pressure in the boiler.

Gas Combination Control Valve (Gas Base
Generator Only) — regulates flow of gas to burners.

Low Water Cutoff/Automatic Fill Control — Level
Sensing Probes — these controls allow the feed water

to enter the generator when the water level is low.
They will also shut off the heat source to the boiler if
the water level drops too low. The level sensing probes
may be easily removed to inspect for lime build-up. As
a rule, the condition of these devices will indicate the
overall water condition of the boiler. Clean the probes
if needed. Controls may not function and serious

clogging will occur if a daily blowdown procedure
is not followed.

22

Water Inlet Ball Valve — water service valve which

can be used to stop water flow to the steamer when the
steamer is being serviced.

High Limit Thermostat — a protective device which
shuts off the gas or electric power if the boiler
overheats.

Descaler — hangs submerged in water inside the
generator and helps control scaling.

Drain — drains steam condensate and water from
cooking compartments and boiler.