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Market Forge Industries ST-6-TGG Installation, Operation And Maintenance Manual

Pressureless steam cooker with gas generators
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ST-6-TGG
PRESSURELESS STEAM COOKER
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Post in a prominent location to be followed in the event the user smells gas. This information shall
be obtained by consulting the local gas supplier.
An Employee-Owned Company
35 Garvey Street • Everett, MA 02149-4422 USA
Tel: (617) 387-4100 • Fax: (617) 387-4456
Fax Outside MA: 1-800-227-2659
E-Mail: CUSTSERV@MFII.COM
Form No. S-4846 Rev. A 11/98 Printed in U.S.A.
™
WITH GAS GENERATORS
and ST-12-TGG
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.
MODEL
ST-6-TGG
ST-12-TGG
™
WARNING
COVERING
•
Installation
•
Operation
•
Service and Parts

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Summary of Contents for Market Forge Industries ST-6-TGG

  • Page 1 ™ ™ ST-6-TGG and ST-12-TGG PRESSURELESS STEAM COOKER WITH GAS GENERATORS 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PARAGRAPH PAGE PARAGRAPH PAGE SECTION 1 INTRODUCTION SECTION 4 TROUBLESHOOTING Description ..........1-1 General ..........4-1 Basic Functioning ......... 1-1 Troubleshooting Guide ......4-1 Service ..........1-1 Electrical Troubleshooting Procedures ........4-1 4.3.1 Incoming Power ........4-3 SECTION 2 INSTALLATION 4.3.2 Electrical Inspection ......
  • Page 3 LIST OF ILLUSTRATIONS FIGURE PAGE SECTION 3 OPERATION SECTION 6 ILLUSTRATED PARTS LIST Controls and Indicators ......3-2 See Page 6-1 SECTION 4 TROUBLESHOOTING Wiring Diagram, Model ST-6 ....4-5 Schematic Diagram, Model ST-6 ........4-9 LIST OF TABLES TABLE PAGE TABLE PAGE...

  • Page 4: Section 1 Introduction

    1.1 DESCRIPTION When steam flowing inside the compartment has raised the interior temperature to 195°F, the contacts of The ST-6-TGG and ST-12-TGG is a pressureless a thermostatic switch automatically close, completing steam cooker consisting of two independently controlled the circuit to the timer motor and starting the cooking compartments enclosed in a single cabinet.

  • Page 5: Section 2 Installation

    The boiler and its individual shut-off valve must be disconnected from the gas supply piping system dur- The Model ST-6-TGG is shipped strapped and bolted ing any pressure testing of that system at test pres- to a skid, with cabinet feet in a separate container. Steps sure in excess of psig (3.45 k/PA).

  • Page 6: Electric Service Connections

    2. INSTALLATION (cont’d.) CAUTION d. Natural gas units are equipped with a pressure regula- tor factory-adjusted to give 4" (102 mm) water column Do not connect hot water to the cold water con- manifold pressure. denser water inlet. e. Propane gas units are equipped with a pressure regu- lator factory-adjusted to give 10"...

  • Page 7: Shut-Down Procedure

    2. INSTALLATION (cont’d.) 2.6.4 Shut-Down Procedure 11. Remove the door latch assembly form the face of the unit. The two (2) nuts mounting the door latch 1. Flip main power switch to “ .” As this is an auto- are located behind the face of the unit and must be matic steam generator system, it will drain itself.
  • Page 8 2. INSTALLATION (cont’d.) TOP RIGHT HINGE MOUNTING HOLES INTERLOCK ASSEMBLY TOP LEFT HINGE ORIGINAL POSITION MOUNTING HOLES DOOR LATCH ASSEMBLY LEFT DOOR LATCH ORIGINAL POSITION MOUNTING HOLES INTERLOCK ASSEMBLY POSITION WHEN DOOR IS REVERSED LOWER LEFT HINGE MOUNTING HOLES LOWER RIGHT HINGE MOUNTING HOLES Figure 2-1.

  • Page 9: Section 3 Operation

    3.2 OPERATING PROCEDURES 3.2.3 Daily Shut-Down Procedure The ST-6-TGG pressureless steam cooker defrosts frozen foods and cooks fresh and defrosted foods. Each cooking compartment permits selection of continuous 1. Flip “Power” switch from “ON” to “OFF”. the (constant steam) cooking or timed (0–60 minutes) cook-...

  • Page 10: Generator Cleaning

    • Keep this manual for daily reference. 3.3.3 Generator Cleaning The ST-6-TGG is designed with an advanced clean- ing system that notifies the user that the steam genera- tor needs to be cleaned. Your steamer permits you to quickly clean the generator. The cleaning sequence is as follows: The amber “...

  • Page 11: Drainage

    3. OPERATION (cont’d.) 3. Turn power switch off and drain the steam genera- After rinse water is drained, turn the power on, wait tor that needs cleaning. for the steam ready light, and you are ready to cook. 4. Turn the power switch on. 5.

  • Page 12: Test Kitchen Bulletin

    3. OPERATION (cont’d.) 3.5 TEST KITCHEN BULLETIN Model ST-6- & 12-TGG Pressureless Cooker Facts On Parade 1. Frozen vegetables should always be cooked in per- 12. Food may be served from the same pan in which it forated 12” x 20” x 21/2” (1/1 65mm) pans 71/2 lbs is steam cooked, thus reducing food breakage since (34 kg) maximum per pan.
  • Page 13 3. OPERATION (cont’d.) The ST-6-TGG pressureless cooker is a two-compartment unit. Each compartment holds three 12” x 20” x 2 ” or 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 on a preheated compartment.
  • Page 14 3. OPERATION (cont’d.) PRESSURELESS STEAM COOKING TIMER SETTINGS AND PORTIONS VEGETABLES Approx. Number Approx. Frozen Recommended Cooked Timer 12” x 20” (1/1) Number Weight Servings Settings in Perforated Pan of Pans Per Pan Per Pan Minutes I T E M Beans, Snap Green 2 1/2”...
  • Page 15 3. OPERATION (cont’d.) PRESSURELESS STEAM COOKING TIMER SETTINGS AND PORTIONS (continued) MEAT—POULTRY—FISH Approx. Number Approx. Frozen Recommended Timer Cooked 12” x 20” (1/1) Number Weight Settings in Servings Perforated Pan of Pans Per Pan Minutes Per Pan I T E M 15-20 2 oz.

  • Page 16: Section 4 Troubleshooting

    4. TROUBLESHOOTING 4.1 GENERAL 4.3 ELECTRICAL TROUBLESHOOTING PROCEDURES The information in this section is intended to assist both the operator and service personnel in locating the Before performing the troubleshooting procedures in general source of problems that may occur with the this section, the serviceman must be familiar with the cooker.
  • Page 17 4. TROUBLESHOOTING (cont’d.) TABLE 4-1 (cont’d.) PROBLEM PROBABLE CAUSE REMEDY 5. G a. 120V power supply is not a. Check to be sure 120V power is connected ENERATOR WILL NOT CREATE connected or turned on. and on. STEAM b. Cooking compartment door b.

  • Page 18: Incoming Power

    4. TROUBLESHOOTING (cont’d.) TABLE 4-1 (cont’d.) PROBLEM PROBABLE CAUSE REMEDY 10. S a. Constant steam position. a. Move knob to timing location. TEAM ENTERS COMPARTMENT b. Faulty thermostatic b. Replace switch. See Subsection 5.4.8. CONTINUOUSLY IMER DIAL switch. NOT TURNING c.

  • Page 19: Electrical Inspection

    4. TROUBLESHOOTING (cont’d.) TABLE 4-2 ELECTRICAL FAULT ISOLATION GUIDE FAILURE FAULT LOCATION 1. Will not operate in either CONSTANT STEAM or 60-MINUTE a. Incoming power TIMER positions. b. Timer c. Door interlock switch d. Wiring 2. Operating in CONSTANT STEAM position but not in 60-MINUTE a.
  • Page 20 Figure 4-1. Wiring Diagram, Model ST-6 TGG...

  • Page 21: Indicator Lights

    4. TROUBLESHOOTING (cont’d.) move the control panel (see Subsection 6.3.4), and pro- does not enter the compartment and the indicator light ceed as follows: fails to turn on with the door latch securely engaged, the fault may be in the door interlock switch. Proceed as 1.

  • Page 22: Buzzer

    4. TROUBLESHOOTING (cont’d.) zero ohm reading on the dial. If a zero ohm reading as shown. Connections can be easily removed. Fig- is not obtained, the switch is defective. ure 5-2 shows the same information schematically and 4. Shut off cooker, disconnect ohmmeter leads, and is an aid in isolating circuits for testing.

  • Page 23: Testing The Water Fill Relay

    4. TROUBLESHOOTING (cont’d.) WARNING: When you turn the power on, there are 3. Disconnect the jumper. terminals that carry 120 volts. Protect the ends of these disconnected wires to prevent shorting to hot 4.4.2 Testing the Low Water Relay leads. 4.
  • Page 24 4. TROUBLESHOOTING (cont’d.) ST-6 TGG (2) COMPARTMENT BOTTOM Figure 4-2. Schematic Diagram, Model ST-6 TGG ARKET ORGE NDUSTRIES 35 G , MA 02149 ARVEY TREET VERETT : 617-387-4100 T : 91-9494 ELEX : 617-387-4456 O MA: 800-227-2659 UTSIDE Form No. S-4846 Rev.

  • Page 25: Section 5 Maintenance

    5. MAINTENANCE 5.1 GENERAL 5.3 REPAIR AND REPLACEMENT This section contains both preventive and corrective Section 6 of this manual contains a listing of all re- maintenance information. Preventive maintenance may placeable parts and associated exploded views of the be performed by maintenance personnel at the estab- steamers.

  • Page 26: Door Gasket Replacement

    5. MAINTENANCE (cont’d.) 5.3.3 Door Gasket Replacement 5.3.4 Exterior Panel Removal WARNING The cooking compartment door gaskets are made of a silicone-type rubber material that is very durable but To prevent hazard in servicing the cooker, be subject to wear during normal operation. Should the gas- certain that the steam supply boiler is shut ket leak, readjust the door gasket to the unit or replace down, the cold water shut-off valve is closed,...

  • Page 27: General

    6. ILLUSTRATED PARTS LIST 6.1 GENERAL 6.3 INDEX OF ILLUSTRATED PARTS LIST PART PAGE This section contains a complete listing of all replace- able parts of the ST-6 TGG and ST-10 TGG. For the pur- Unit Assembly pose of parts identification, the unit is broken down into functional assemblies, and each assembly is shown in Cabinet Assembly an exploded view that is keyed to the accompanying...

  • Page 28: Illustrated Parts List

    6. ILLUSTRA TED PARTS LIST...
  • Page 29 ITEM PART DESCRIPTION ST-6-TGG ST-12-TGG 97-5972 FRONT RISER PANEL 97-5922 GENERATOR 97-5964 CABINET DOOR ASSY 97-5957 DELIME FUNNEL 97-5938 ELBOW, 3/8 C x 1/8 MPT 97-5897 HI-LIMIT THERMOSTAT 97-5959 COVER, HI-LIMIT THERMOSTAT 97-5619 FITTING, THERMOSTAT 97-5930 BRASS PLUG, 3/8 MPT...
  • Page 30 6. ILLUSTRA TED PARTS LIST...
  • Page 31 6. ILLUSTRA TED PARTS LIST ITEM PART NO. PART NO. ST-6TGG ST-12TGG DESCRIPTION QTY. 98-3501 91-7616 POST, REAR CONDENSER ASSY. 10-5859 10-5859 INLET SOLENOID 08-4892 08-4892 BARB, 1/2" IPS X 3/8" ID TUBE 10-8823 10-8823 ELBOW, STREET, 1/2" IPS 98-3510 91-7595 INLET ADAPTER ASSY.
  • Page 32 6. ILLUSTRA TED PARTS LIST ITEM PART DESCRIPTION ST-6-TGG ST-12-TGG 97-5988 STEAM FLEX TUBE, 30" 97-5987 STEAM FLEX TUBE, 24" 97-5988 STEAM FLEX TUBE, 30" 97-5987 STEAM FLEX TUBE, 24" 97-5989 STEAM FLEX TUBE, 42" 97-5988 STEAM FLEX TUBE, 30"...
  • Page 33 ELBOW, 3/4 C x 3/4 MPT 97-5987 BLOW DOWN VALVE 97-5989 CONNECTOR, 3/4 C x 3/4 MPT 97-5988 UNION ELBOW, 3/4" ITEM PART Component . DESCRIPTION ST-6-TGG ST-12-TGG 97-5990 OPERATING THERMOSTAT 97-5975 MOUNTING BRACKET 97-5949 DIAL 97-5974 MOUNTING BRACKET 97-5992 RELAY, SPDT, 120V...
  • Page 34 6. ILLUSTRA TED PARTS LIST Natural Gas ITEM PART DESCRIPTION ST-6-TGG ST-12-TGG 97-5954 BURNER ASSY 97-5923 BURNER MOUNTING BRACKET 97-5971 SPARK ELECTRODE 97-5994 HEX CAP SCREW, 1/4-20 x 1-1/2" 97-5927 FENDER WASHER, 1/4" 97-5953 BURNER SUPPORT 97-5929 SQUARE HEAD PIPE PLUG, 1/8" MPT...
  • Page 35 6. ILLUSTRA TED PARTS LIST ITEM PART NO. PART NO. ST-6TGG ST-12TGG DESCRIPTION QTY. 91-5729 91-7692 OUTER DOOR 91-5766 91-7694 INNER DOOR 91-5731 91-7696 GASKET RETAINING PLATE 91-5286 91-7783 DOOR GASKET 91-5745 91-5745 DOOR HANDLE 09-1608 09-1608 STRIKER 08-5027 08-5027 MAGNET 91-5901 91-5901...
  • Page 36 6. ILLUSTRA TED PARTS LIST 6-10...
  • Page 37 6. ILLUSTRA TED PARTS LIST ITEM PART DESCRIPTION QTY. 98-3809 FRAME & DRAIN ASSEMBLY 98-3826 GAS CONTROL BOX ASSEMBLY- ELECTRICAL 98-0090 BURNER TUBE 98-3846 BURNER, IGNITOR, & SENSOR ASSEMBLY 98-0124 GENERATOR, BOILER ASSY 08-4942 ELBOW, 90, 1" N.P.T. STEEL 08-4988 ELBOW, 45, 1"...
  • Page 38 6. ILLUSTRA TED PARTS LIST ITEM PART NO. PART NO. ST-6TGG ST-12TGG DESCRIPTION QTY. 98-3504 91-6489 CONTROL PANEL 98-3507 91-7612 ARTWORK, CONTROL PANEL 08-6464 08-6464 60 MIN. TIMER 08-6541 08-6541 TERMINAL STRIP 91-6471 91-6471 BRACKET, TERMINAL STRIP 10-7395 10-7395 BUZZER 08-3826 08-3826 KNOB, TIMER...
  • Page 39 6. ILLUSTRA TED PARTS LIST GAS CONTROLS ASSY DESCRIPTION ITEM PART NO. QTY. 98-3822 WELDMENT ASSY. BOX, GAS CONTROL 10-6005 TERMINAL STRIP, (TB-2A & TB-2B) 08-6472 RELAY, 120 VAC (RI-A & R1-B) 08-6475 RELAY SOCKET, 120 VAC (RI-A & RI-B) 08-7130 IGNITION MODULE (IM-A &...
  • Page 40 6. ILLUSTRA TED PARTS LIST GASLING ASSY DESCRIPTION ITEM PART NO. QTY. 10-3452 TEE, M.I. 1/2" X 1/2" X 1/2" N.P.T. 10-3494 NIPPLE, M.I. 1/2" N.P.T. X 2.25" LG 10-3332 UNION, M.I. 1/2" N.P.T X 1/2" N.P.T. 08-4960 NIPPLE, CLOSE 1/2" N.P.T. 08-7568 VALVE, GAS #SC-300 1/2"...

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