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Market Forge Industries PLUS-TWELVE ST-12 Installation, Operation & Maintenance Manual

Pressureless steam cooker
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PRESSURELESS STEAM COOKER
INSTALLATION, OPERATION & MAINTENANCE MANUAL
Tel: (617) 387-4100
Form Number: S-4475 Rev: A
PLUS-TWELVE
35 Garvey Street
Fax: (617) 387-4456
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E-Mail: custserv@mfii.com
06/03
Printed in U.S.A.
TM
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
For Your Safety
Do not store or use gasoline or other
flammable vapors or liquids in the vicinity
of this or any other appliance.
MODEL:
m ST-12
Everett
MA
02149
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Fax: (Outside MA) 1-800-227-2659
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Website: http://www.mfii.com
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Warning
equipment.
COVERING:
m Installation
m Operation
m Service & Parts

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Summary of Contents for Market Forge Industries PLUS-TWELVE ST-12

  • Page 1 PLUS-TWELVE PRESSURELESS STEAM COOKER 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. For Your Safety Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS PARAGRAPH PAGE PARAGRAPH PAGE SECTION 1 INTRODUCTION 1.1 Description ..........5.4.8 Buzzer ..........1.2 Basic Functioning ......... 5.4.9 Cold W ater Condener Circuit ....1.3 Service ..........5.4.10 Wiring ........... SECTION 2 INSTALLATION SECTION 6 MAINTENANCE 2.1 Assembly ..........6.1 General ..........

  • Page 4: Section 1 Introduction

    The operating controls are displayed on a single front-mounted panel that includes a Product Service Department Market Forge Industries Inc. timer with an indicator light for the selection of constant steam or 60-minute-long duration cooking. 35 Garvey Street...

  • Page 5: Section 2 Installation

    SECTION 2 INSTALLATION 2.1 Assembly 2.5 Installation Check-Out The Pressureless Cooker is factory-mounted on a cabinet Check-out procedures for the cooker mounted on steam base containing either a steam boiler or direct steam boilers of electric, gas, and steam coil or direct-connected connection controls for the cooker.

  • Page 6: Shut-Down Procedure

    SECTION 2 INSTALLATION 2.5.3 Shut-Down Procedure 12. Remove the two white hole plugs from the left door latch mounting holes, and insert them into the right No shut-down procedure is required for the Pressureless door latch mounting holes (where the door latch Cooker except to check that the timer dial is in the OFF assembly was originally mounted).
  • Page 7 SECTION 2 INSTALLATION...

  • Page 8: Section 3 Operation

    SECTION 3 OPERATION 3.1 Operating Controls and Indicators 3. Set timer cooking time: a. constant steam—for continuous cooking The controls and indicators required to operate the b. 60-minute timer—for timed cooking. Pressureless Steam Cooker are listed in Table 3-1, together with a short functional description of each. 4.

  • Page 9: Drip/Spill Trough Drainage

    SECTION 3 OPERATION PLUS - 12 TIMER START CLEAR 3.4.2 Drip/Spill Trough Drainage STOP The ST-12 Pressureless Steam Cooker has a drip/spill trough below the cooking compartment door. It will catch any condensate gathering on the front of the unit when the TIMED CONSTANT STEAM...

  • Page 10: Test Kitchen Bulletin

    SECTION 3 OPERATION TEST KITCHEN BULLETIN Model ST-12 Pressureless Cooker Facts On Parade 3.5 TEST KITCHEN BULLETIN 1. Frozen vegetables should always be cooked in perforated 12” x 20” x 2 1/2” (1/1 65mm) pans. 2. Frozen entrees should be underlined with a perforated pan for best results. If they are defrosted first, the heating time will be decreased.
  • Page 11 SECTION 3 OPERATION The ST-12 Pressureless Cooker is a one compartment unit. The compartment holds twelve 12” x 20” x 2 1/2” or six 12” x 20” x 4” pans. This unit enables the cook to prepare foods close to the time of service. The cooking times given are timer settings and should be set in a preheated compartment.
  • Page 12 SECTION 3 OPERATION PRESSURELESS STEAM COOKING TIMER SETTINGS & PORTIONS VEGETABLES Recommended Approx. Number Approx. Frozen Timer 12” x 20” (1/1) Number Cooked Servings Weight Settings in Perforated Pan Per Pan ITEM of Pans Per Pan Minutes Beans, Snap Green 2 1/2”...
  • Page 13 SECTION 3 OPERATION PRESSURELESS STEAM COOKING TIMER SETTINGS & PORTIONS MEAT, POULTRY & FISH CONTINUED Recommended Approx. Number Approx. Frozen Timer 12” x 20” (1/1) Number Cooked Servings Weight Settings in Perforated Pan Per Pan ITEM of Pans Per Pan Minutes Meatloaf* 2 1/2”...

  • Page 14: Section 4 Principles Of Operation

    SECTION 4 PRINCIPLES OF OPERATION 4.1 General 4.2.2 Steam Exhaust and Drain Lines The ST-12 Pressureless Steam Cooker consists of one Perforated strainers at the drain line opening inside the cooking compartment in a single cabinet assembly. The compartment allow only steam, condensation, and liquid compartment is fitted with an independent electrically cooking drainage to enter.

  • Page 15: Indicator Lights

    SECTION 4 PRINCIPLES OF OPERATION WATER INLET TO TOP CAVITY STEAM JET PIPE WATER TO (2 PER COMPARTMENT) DRAIN LINE STEAM LINE TO CAVITY STEAM LINE TO CAVITY WATER INLET FROM BOILER STEAM LINE FROM BOILER Figure 4-1 Pictorial Diagram, Steam & Water Circuits (Model ST-20 Shown Here) When the timer motor has operated for the preset mally open contacts.

  • Page 16: Section 5 Trouble-Shooting

    SECTION 5 TROUBLE-SHOOTING 5.1 General 5.3 Electrical Fault Isolation The information in this section is intended to assist both Correction of an electrical failure first requires isolation of the operator and service personnel in locating the general the fault to a single circuit or component. In most cases, source of problems that may occur with the cooker.

  • Page 17: Incoming Power

    SECTION 5 TROUBLE-SHOOTING The electrical trouble-shooting procedures that follow timer contacts are defective and the timer must be require access to components and terminals of the replaced. electrical control panel shown in Figure 7-3. Electrical controls are reached by removing screws that fasten the 5.

  • Page 18: Section 5 Trouble-Shooting

    SECTION 5 TROUBLE-SHOOTING TO FRONT FRAME GRD STUD CONNECTOR REED SWITCH PILOT-LIGHT RELAY R1 COLD WATER CONDENSER BUZZER (UPPER) TIMER DONE THERMOSTAT SWITCH S3 TIMER 60 MIN. TIMER TMR1 (UPPER) STEAM SOL. VALVE V3 EXISTING WIRES TO 120/240V SUPPLY BOX TO 120/240V SUPPLY BOX N (L2)
  • Page 19 SECTION 5 TROUBLE-SHOOTING NOT AVAILIABLE AT THIS TIME Figure 5-1 Wiring Diagram Digital Controls, Model ST-12 (NOT AVAILIABLE AT THIS TIME)

  • Page 20: Steam Solenoid V Alves

    SECTION 5 TROUBLE-SHOOTING 5.4.5 Steam Solenoid Valve buzzer coil connections with input power on and selector switch and coinciding timer dial set at the “0-Minute” When either inlet solenoid valve fails to operate, the fault position. If voltage is 120 volts, the fault is in the buzzer, may be a defective coil.
  • Page 21 SECTION 5 TROUBLE-SHOOTING Figure 5-3 Ladder Diagram, Plus 12 (1) Compartment...

  • Page 22: Section 6 Maintenance

    SECTION 6 MAINTENANCE 6.1 General 2. Remove the control panel by removing the eight mounting screws and disconnecting the wire plug and This section contains both preventive and corrective restraining wire. maintenance information. Preventive maintenance may be performed by maintenance personnel at the establishment 3.

  • Page 23: Exterior Panel Removal

    SECTION 6 MAINTENANCE 7. Reassemble the inner door assembly using the six Access to all internal plumbing and electrical assemblies is screws on the outside of the door. from the right side and right front. The left-side panel is removed by removing the bottom screw and pushing up on NOTE: the panel until the lower lip disengages the frame.

  • Page 24: General

    For a current Market Forge Authorized Parts Distributor List, contact: 7-1 Cabinet Assembly ...........7-2 Product Service Department 7-2 Door Assembly ............7-3 Market Forge Industries Inc. 35 Garvey Street 7-3 Control Panel Assembly ..........7-4 Everett, Massachusetts 02149 Telephone: (617) 387-4100...

  • Page 25: Section 7 Illustrated Parts List

    SECTION 7 ILLUSTRATED PARTS LIST ITEM PART DESCRIPTION QTY. 08-6308 REED SWITCH 98-1691 ASSY, PLUMBING DRAIN 98-1709 POST, REAR 08-4912 COUPLER, 1/2"NPT X 5/8"ID BARB 10-2793 ELBOW, 90, 1/2" IPS 08-6538 CHECK VALVE 3/8 OD BLACK 91-6491 GROMMET, SILICONE, RED 91-7318 WELD ASSY, TOP 10-9174...
  • Page 26 SECTION 7 ILLUSTRATED PARTS LIST Figure 7-1 Cabinet Assembly...

  • Page 27: Section 7 Illustrated Parts List

    SECTION 7 ILLUSTRATED PARTS LIST Figure 7-2 Door Assembly ITEM PART DESCRIPTION QTY. 91-7386 OUTER DOOR 91-7387 INNER DOOR 91-7388 GASKET RETAINING PLATE 91-7389 DOOR GASKET 91-5745 DOOR HANDLE 09-1608 STRIKER 08-5027 MAGNET 91-5901 MAGNET BRACKET 08-4600 COMPRESSION SPRING...
  • Page 28 SECTION 7 ILLUSTRATED PARTS LIST Figure 7-3 Control Panel Assembly ITEM PART DESCRIPTION QTY. 98-1706 CONTROL PANEL 98-1698 ARTWORK, CONTROL PANEL 08-6464 60 MIN. TIMER 08-6541 TERMINAL STRIP 91-6471 BRACKET, TERMINAL STRIP 10-7395 BUZZER 08-3826 KNOB, TIMER 10-5052 LIGHT, RED...
  • Page 29 SECTION 7 ILLUSTRATED PARTS LIST Figure 7-4 Condenser Assembly ITEM PART DESCRIPTION QTY. 10-5859 VALVE, STEAM SOLENOID 08-4892 COUPLER, BRS 3/8ODX1/2THRD NPT 10-2885 UNION, FEMALE 1/2 IPS 10-2849 NIPPLE, CLOSE 1/2" NPT BRS 98-1477 COUPLERBRS,BARB 3/8"X3/8" NPT 08-6581 TEE, MALE 1/2" NPTX FEML 1/2" BRANCH 10-3739 1/2"X 3/8 REDUCING BUSHING 98-1630...

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