Market Forge PS-3E, PS-6E Operation Manual

OWNER'S MANUAL

ELECTRIC CONVECTION STEAMER

MODELS: PS-3E

PS-6E

PART NUMBER 10195R0 1 S-6100 01/07

INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

IMPORTANT NOTES FOR INSTALLATION AND OPERATION

This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.

WARNING: Improper installation, operation, adjustment, alteration,
service or maintenance can cause property damage, injury or death.
Read the installation, operating and maintenance instructions
thoroughly before installing, operating or servicing this equipment.

This manual should be retained for future reference.

Intended for commercial use only. Not for household use.

Adequate clearances must be maintained for safe and proper operation.

PART NUMBER 10195R0 2 2006-05-09

INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

TABLE OF CONTENTS

DESCRIPTION PAGE

Important Notes for Installation and Operation ....................................2

1.0 Service Connections ....................................................4

2.0 Installation Instructions ...................................................5

3.0 Operation ............................................................13

4.0 Suggested Cooking Guidelines ...........................................17

5.0 Cleaning .............................................................21

6.0 Maintenance .........................................................23

7.0 Service ..............................................................25

8.0 Parts ...............................................................28

Wiring Diagrams ..........................................................35

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

1.0 SERVICE CONNECTIONS

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

2.0 INSTALLATION INSTRUCTIONS

GENERAL

The PS-3E and PS-6E steamers are single compartment electric pressureless steam cookers
with an internal electric steam generator that maintains standby water temperature at
approximately 205°F. PS-3E is rated 10 kW. PS-6E is rated 15 kW.

At high altitude locations a lower temperature is required to achieve atmospheric steaming.
Contact your authorized service office to have the thermostat adjusted if the steamer will be
operated at high altitudes.

UNPACKING

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

Prior to installation, verify that the electrical service agrees with the specifications on the
machine data plate which is located on the left side panel.

LOCATION

Allow space for plumbing and electrical connections. Minimum clearances are 0" on the sides
and 6" (152 mm) on the back for proper air circulation. Allow adequate access for operating
and servicing the steamer, 36" (915 mm) at the front of the steamer and 15" (381 mm) above
the steamer.

LEVELLING FEET (Standard) OR 4" ADJUSTABLE LEGS (Optional)

Thread the four 2" levelling feet shipped in a bag inside the steamer cabinet into the threaded
holes on the bottom corners of the steamer. Or, thread the four optional 4" adjustable legs into
the threaded holes on the bottom corners of the steamer.

PART NUMBER 10195R0 5 2006-05-09

INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

2.0 INSTALLATION INSTRUCTIONS (Continued)

LEVELLING

Using a spirit level or pan of water in the bottom of the steamer, adjust the levelling feet or the
feet on the adjustable legs to level the steamer front-to-back and side-to-side. After the drain is
connected, check for level by pouring water onto the floor of the compartment. All water should
drain through the opening at the back of the compartment cavity.

ANCHORING STEAMER (Without Legs)

1. Place steamer in the desired location on the levelled counter top and mark four corners.
Remove the steamer and drill ½" holes as indicated in Figure 1.

2. Apply a bead of RTV or other equivalent sealant around bottom perimeter edge of the
steamer. If anchoring the steamer, this bottom seal is necessary to meet NSF
requirements.

3. Set steamer on counter and bolt down securely with 3/8 - 16 bolts (not supplied).

STACKING KIT

Follow instructions in the stacking kit when installing stacked convection steamers.

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

2.0 INSTALLATION INSTRUCTIONS (Continued)

FIGURE 1

WARNING: Disconnect the power supply to the appliance before
cleaning or servicing.

Make electrical connection through the 1-1/8" (29 mm) diameter hole provided using 3/4" (19
mm) trade size conduit. Refer to the wiring diagram located inside the right side panel. Use
90°C minimum insulated wire.

PLUMBING CONNECTIONS

WARNING: Plumbing connections must comply with applicable
sanitary, safety, and plumbing codes.

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

2.0 INSTALLATION INSTRUCTIONS (Continued)

The water supply inlets are provided with 3/8" (10 mm) compression fittings for 3/8" O.D.
copper tubing. The water supply line pressure should be 25 - 50 psi (170 - 345 kPa) for each
line. The water supply to the generator tank is separate from the water supply to the cooling
system where steam is condensed before entering the drain line.

Install line strainers (not provided). A manual shutoff valve for each supply line must be
provided convenient to the steamer.

We recommend treated water feeding the boiler inlet supply, and untreated water feeding the
cooling system inlet. Hook-ups are labelled on the back of the steamer.

ADJUSTMENT FOR HIGH ALTITUDE LOCATIONS

The steamer has been factory set so that when it is ON, and during the READY phase, it will
maintain water temperature in the steam generator tank at approximately 205°F (96°C) (just
below water boiling point). However, for high altitude locations, an authorized service agency
must adjust the steamer to achieve this temperature.

ADJUSTMENT FOR DRAIN WATER TEMPERATURE

Cooling solenoid valves have been adjusted to yield drain temperatures of 140°F. This will vary
depending on install location water supply temperature and pressure. A qualified service
person should adjust the cooling solenoid valves should the drain temperature be other than
desired. Refer to section 7.0 Service on page 26 for adjustment instructions.

DRAIN CONNECTIONS (FIGURE 2)
The drain connection (Fig. 2) must be 1" IPS down, preferably with one elbow only, maximum

length of 6 feet and piped to an open air gap type drain. Use copper only.

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

2.0 INSTALLATION INSTRUCTIONS (Continued)

FIGURE 2

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

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

WATER QUALITY

The water supply connected to this steamer should contain no more than 2.0 grains of
hardness per gallon with pH from 6.5 to 8.0. This degree of hardness and pH can easily be
obtained with the use of a properly maintained water softener.

Water supplies vary from one location to another. A local water treatment specialist should be
consulted before installing any steam generating equipment.

Untreated water contains scale producing minerals which can precipitate onto the surfaces in
the boiler. Due to the temperatures in the boiler, the minerals can bake onto the surfaces and
components. This can result in early component failure and reduced product life.

Mineral scale on components causes several problems:

1. The surfaces of the heating devices become coated with scale, reducing the heat transfer
efficiency. This can produce hot spots on the heating elements and result in premature
failure.

2. The water level probes become coated with scale. Scale will bridge across the probe
insulator from the metal extension which senses the water level in the boiler. Once this
scale becomes wet, the water level control is unable to maintain the proper water level in
the boiler. This situation may cause an electric heating element to fail if the element is not
adequately covered by water.

Strainers and filters will NOT remove minerals from the water.
Refer to REMOVAL OF LIME SCALE DEPOSITS, page 23.

VENT HOOD

Some local codes may require the steamer to be located under an exhaust hood. Information
on the construction and installation of ventilating hoods may be obtained from Vapor Removal
from Cooking Equipment, NFPA standard No. 96 (latest edition).

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

ELECTRICAL CONNECTIONS

WARNING: Disconnect electrical power supply and place a tag at
the disconnect switch to indicate that you are working on the circuit.

Electrical grounding must be provided in accordance with local codes or in the absence of local
codes, with the National Electrical Code, ANS/NFPA70, or the Canadian Electrical Code, CSA
C22-2, as applicable.

Use copper wire suitable for at least 200 degrees Fahrenheit (90 degrees Celsius). The
steamer must be grounded. The wiring diagram is located on the right side panel as you face
the steamer.

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INSTALLATION AND OPERATION MANUAL AND PARTS,

ELECTRIC CONVECTION STEAMERS, MODELS: PS-3E, PS-6E

TESTING PROCEDURES

CAUTION: Live steam and accumulated hot water in the
compartment may be released when the door is opened.

Once the steamer is installed and all mechanical connections have been made, thoroughly test
the steamer before operation.

1. Check that proper water, drain and electrical connections have been made.

2. Turn main power switch ON. After approximately 15 minutes, the READY light should come
on, indicating that the water temperature is 205 degrees Fahrenheit.

3. When the READY light comes on, set timer to the “5 minute” position. With door open,
observe that no steam is entering the compartment and that the COOKING light is OFF.

4. Close compartment door. The COOKING light should now be illuminated and steam should
be heard entering the compartment after about 45 seconds.

5. Check drain line to ensure that water from cold water condenser is flowing through the drain
line.

6. Open compartment door and observe that steam supply to chamber is cut off. (READY
light should again come on as COOKING light goes off.)

7. Close compartment door and let cooking cycle finish. When the timer returns to “0"
position, a buzzer will sound signalling the end of the cooking cycle. Buzzer must be
manually turned off by setting the timer to its OFF position.

8. To shut down steamer, turn main power switch OFF and leave compartment door slightly
open.

PART NUMBER 10195R0 12 2006-05-09