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Market Forge Industries ST-24, Owner'S Manual, Page: 1 / 35

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OWNER’S MANUAL 

 

ST-24 PRESSURELESS STEAM COOKER 

    

 

Model:  

□ ST-24

 

 
 

 
 
 
 
 
 
 
 

 
 
 
 
 

 
 
 
 
 
 
 
 

 

 

INSTALLATION, OPERATION, MAINTANANCE, PARTS AND SERVICE 

 

 
 
 
 
 
 

 

WARNING: 

IMPROPER INSTALLATION, ADJUSTMENT, 

ALTERATION, SERVICE OR MAINTENANCE CAN 

CAUSE PROPERTY DAMAGE, INJURY OR DEATH. 

READ THESE INSTALLATION, OPERATION 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. 

Form Number: S-4627      Rev. B        10/12 
Printed in USA   

 

 

 

 

 

      35 Garvey Street, Everett, MA 02149 

Telephone (617) 387-4100, (866) 698-3188, Fax (617) 387-4456, (800) 227-2659 

[email protected], www.mfii.com 

CAUTION: 

INSTRICTIONS TO BE FOLLOWED IN THE EVENT 

THE USER SMELLS GAS SHALL BE POSTED IN A 

PROMINENT LOCATION. THIS INFORMATION 

SHALL BE OBTAINED BY CONSULTING THE LOCAL 

GAS SUPPLIER. 

Summary of Contents for ST-24

Page 1: ...LING 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 Form Number S 4627 Rev B 10 12 Printed in USA 35 Garvey Street Everett MA 02149 Telephone 617 387 4100 866 698 3188 Fax 617 387 4456 800 227 2659 custserv mfii com www mfii com CAUTION INSTRICTIONS TO BE FOLLOWED IN THE EVENT THE USER SME...

Page 2: ...Door Interlock Switch 16 Thermostatic Switch 16 Digital Timers Optional 16 Kettle Switch Optional 16 TROUBLE SHOOTING 17 GENERAL 17 Trouble Shooting Guide 17 Electrical Fault Isolation 17 Electrical Trouble Shooting Procedures 17 GENERAL TROUBLE SHOOTING GUIDE TABLE 17 Incoming Power 18 Electrical Inspection 18 ELECTRICAL FAULT ISOLATION GUIDE 19 60 MINUTE TIMER 19 Timer Contacts 19 Timer Motor 19...

Page 3: ...nal when it is set to constant steam or the timer is set at the desired cooking time and the compartment door is closed The indicator light comes on and the steam solenoid valve opens allowing steam to flow into the compartment When steam flowing inside the compartment has raised the interior temperature to 195 F the contacts of a thermostatic switch automatically close completing the circuit to t...

Page 4: ...rvice of the equipment should be performed by qualified personnel who are knowledgeable with Market Forge cooking equipment Should repairs be required a network of authorized agencies is available to assist with prompt service A current Directory of Authorized Service Agencies may be obtained by contacting Product Service Department Market Forge Industries Inc 35 Garvey Street Everett Massachusett...

Page 5: ...et frame Connection locations for the cooker mounted on steam boilers of electric gas and steam coil utility and direct connected steam are shown in separate installation instructions for each WATER CONNECTIONS Before connecting water to this unit have water supply analyzed to make sure that hardness is no greater than 2 0 grains per gallon and pH level is within the range of 7 0 8 5 Water that fa...

Page 6: ... condenser operation is evidenced by presence of water flowing from the drain line 4 Observe cooker operation for several minutes Operation is correct if timer dials begin to rotate after a short delay period required for preheating After the delay period plus the 4 minute initial setting the timer dials will return to the 0 Minute position at which a buzzer sounds The buzzer is silenced by turnin...

Page 7: ...e face of the unit and must be accessed where the right side panel was removed 12 Remove the two white hole plugs from the left door latch mounting holes and insert them into the right door latch mounting holes where the door latch assembly was originally mounted 13 Rotate the door latch assembly 180 and install into the left door latch mounting holes NOTE Each stud on the latch assembly should ha...

Page 8: ...s centered with the latch and the gasket is in contact with the entire lip of the cooking compartment 23 Gently open the cooking compartment door taking care not to move it out of position 24 Tighten all 4 door hinge bracket mounting screws 25 Close and visually inspect the door again as described in step 22 26 Reinstall the left and right side panels using the screws for each panel Figure 1 Typic...

Page 9: ... period of the cooker For steam boilers see instruction plate Preheating Before each initial operation of the cooker and at any other time when the cooking compartment is cold a 1 minute preheating period is required To preheat the cooker put steam source into operation and proceed as follows 1 Close cooking compartment door 2 Set 60 Minute Timer Dial 1 to 1 minute setting NOTE Total elapsed prehe...

Page 10: ...leting the following steps 1 Remove left and right side pan supports baffles and drain screens by lifting up and off mounting studs Wash with a mild detergent Rinse and set aside for reassembly 2 Wash cooking compartment interior using a mild detergent and water Rinse and dry thoroughly 3 Replace pan supports baffles and drain screens in compartment and leave door open DRAINAGE Cooking Compartment...

Page 11: ...imer Constant Steam Controls cooking up to 60 minutes or uses constant operation 2 10 5052 Indicator Light Red Indicates cooking is in operation 3 08 6429 Digital Timer Control cooking up to 60 minutes or uses constant operation 4 08 6551 Mode Switch Constant steam Timer 5 08 6549 Compartment Switch Top and bottom cavity or kettle BTM take off ...

Page 12: ...cooking they can be prepared closer to serving time insuring maximum freshness 11 Steam cooked foods have a higher percent yield more portions per dollar spent 12 Food may be served from the same pan in which it is steam cooked thus reducing food breakage since there is no extra handling or transferring of food from cooking pans to serving pans It also reduces pot washing tasks 13 Some important a...

Page 13: ...Asparagus Spears 7 1 2 3 4 2 1 2 65mm 10 12 15 30 3oz 85g Green Beans Regular 6 2 7 2 1 2 65mm 10 10 15 25 3oz 85g Green Beans French Cut 6 2 7 2 1 2 65mm 10 5 7 25 3oz 85g Beans Lima 7 1 2 3 4 2 1 2 65mm 10 12 15 30 3oz 85g Broccoli 6 2 7 2 1 2 65mm 10 4 6 25 3oz 85g Brussels Sprouts 7 1 2 2 7 2 1 2 65mm 10 10 15 30 3oz 85g Carrots 6 2 7 2 1 2 65mm 10 10 15 25 3oz 85g Cauliflower 6 2 7 2 1 2 65mm...

Page 14: ...5 3oz 85g Broccoli Stalks 1 2 3 4 12 20mm 6 2 7 2 1 2 65mm 10 14 18 25 30 3oz 85g Carrots Sliced 9 4 2 1 2 65mm 10 18 21 35 40 3oz 85g Cauliflower Trimmed 1 1 2 2 38 50mm 6 2 7 2 1 2 65mm 10 12 16 30 35 3oz 85g Corn on Cob Husked 1 doz 2 1 2 65mm 10 10 15 12 Cabbage Head Cored 1 4 1 6 5 2 25 2 1 2 65mm 10 14 18 15 20 4oz 115g Onions 2 Ø 50mm 6 2 7 2 1 2 65mm 10 20 25 25 30 4oz 115g Peas Shelled 5 ...

Page 15: ...ls 1oz 30g Size 6 2 7 2 1 2 65mm 10 20 25 20 25 Protein 2oz 55g Meatloaf 15 6 8 2 1 2 65mm 10 40 50 50 60 Protein 2oz 55g Pork Chops Loin Bone 4oz 115g 6 2 7 2 1 2 65mm 10 25 30 24 Protein 2oz 55g Sausage 1 1 2oz 45g 6 2 7 2 1 2 65mm 10 18 21 18 20 2oz 55g Turkey On Carcass 20 22 9 10 2 1 2 65mm 1 2 to 2 1 2 Hours 50 60 Protein 2oz 55g Turkey Off Carcass 10 12 4 5 5 2 1 2 65mm 10 1 to 1 1 4 Hours ...

Page 16: ...ng been reduced to water by the cold water condenser is directed into the boiler or direct connected steam control drain system Steam inlet lines for compartments are equipped with normally closed solenoid valves operated by the electrical control circuits The inlet valves are opened whenever the compartment control circuit is activated by use of the 60 minute timers Steam Inlet Line A steam suppl...

Page 17: ...n the cabinet on which the cooker is mounted Power is supplied to the control circuit at all times when the shut off device Circuit Breaker for the unit installed by a certified Electrician is in the ON position Control Circuit Components A brief description of the electrical circuit elements follows 60 Minute Timer Constant Steam The timer contains a 120 volt AC synchronous motor that drives a ti...

Page 18: ...h with normally open contacts The switch is operated by the proximity of a magnet within the door When the door is open the switch contacts remain in the open position When the door is closed and securely latched in place the magnet is near the switch to close the contacts Connected between the operating contact 3 of the timers and the steam inlet solenoid valve the door switch acts as a protectiv...

Page 19: ...ion as well as with the Principles of Operation described in Principles of Operation section pages 14 16 GENERAL TROUBLE SHOOTING GUIDE TABLE PROBLEM PROBABLE CAUSE REMEDY 1 Indicator light fails to light with timer set a Power to cooker off a Locate external circuit breaker for incoming power and place in ON position b Door interlock switch contacts not closed b Shut cooker door to close switch c...

Page 20: ...cuits or disconnected at the pin connection for complete removal and repair Incoming Power Before trouble shooting any of the electrical parts or assemblies verify that power is being supplied to the cooker Incoming power is connected at the boiler or direct connected steam control box located in the base cabinet With power connected to the cooker an AC voltmeter is used to measure 120 volts acros...

Page 21: ...ll result in failure of either cooker compartment to operate When this occurs remove the control panel see Exterior Panel Removal on page 27 and proceed as follows 1 Turn off power to the cooker at external circuit breaker 2 Disconnect all five wires from timer terminals see Figure 4 on page 22 3 Connect an ohmmeter between terminals 1 and 3 4 Rotate timer dial beyond the 0 Minute point any settin...

Page 22: ...NUTE TIMER mode If voltage of 120 volts is present and the coil fails to open the valves the fault is in the valve coil Defective valve coils are not separately replaceable requiring complete valve replacement Indicator Lights If the cooker compartment functions correctly with the single exception that the indicator light fails to light during operation the fault is a defective indicator light A b...

Page 23: ... a faulty valve coil A defective coil is found using an AC volt meter to check the voltage at the coil wire terminals with the cooker compartment in operation If voltage of 120 volts is present and the valve fails to open the fault is in the valve coil Defective valve coils are separately replaceable Wiring All of the electrical components of the cooker timers indicator lights etc are connected to...

Page 24: ...22 Wiring Diagrams Figure 4 Wiring Diagram Mechanical Controls Model ST 24 ...

Page 25: ...23 Figure 5 Wiring Diagram Digital Controls Model ST 24 ...

Page 26: ...24 Figure 6 Wiring Ladder Diagram Model ST 24 ...

Page 27: ...renced when corresponding with Market Forge The data plate containing the serial number pertaining to the equipment is located on the lower front trim of the cabinet PREVENTIVE MAINTENANCE A good preventive maintenance program starts with the daily cleaning procedure see Cleaning Procedure on page 26 Additional preventive maintenance operations are presented in this section In establishments that ...

Page 28: ... each nut off 1 2 turn 5 Remount the control panel reconnecting wire plug and restraining wire Door Handle Tension Adjustment Procedure 1 Open the cooking compartment door 2 Remove the six screws and washers from the top edge and bottom edge of the door 3 Remove the inner door gasket mounting plate assembly from the outer door Do not disassemble these three components remove them as an assembly 4 ...

Page 29: ...ng side panels Access to all internal plumbing and electrical assemblies is from the right side and right front The left side panel is removed by removing the bottom screw and pushing up on the panel until the lower lip disengages the frame The panel is shown as item 25 in Figure 7 on page 28 The electric control panel shown in Figure 10 on page 32 may also be removed as a unit by removing screws ...

Page 30: ...28 ILLUSTRATED PARTS LIST Cabinet Assembly Figure 7 Cabinet Assembly ...

Page 31: ...TCH DOOR 2 20 08 4600 SPRING COMPRESSION 4 21 98 1637 MECHANICAL CONTROL PANEL WITH SWITCH 1 22 91 7684 STRAINER CAVITY 2 23 98 1605 WELD ASSEMBLY MIDDLE RACK 2 24 91 7699 RACK SIDE 4 25 10 4586 NUT 1 2 IPS S S WITH TEFLON 6 26 10 8105 THERMOSTAT SNAP DISC PROBE TYPE 2 27 10 3343 NUT BRASS 1 2 IPS 2 28 10 1956 SCREW TAPTIGHT 8 32 X 3 8 20 29 10 2571 NUT LOCK 8 32 17 30 08 1204 PLUG HOLE WHITE 4 31...

Page 32: ...Figure 8 Door Latch and Handle Model ST 24 Door Latch and Handle Parts List ITEM PART NO DESCRIPTION QTY 1 91 5669 LATCH OLD VERSION 2 2 91 6734 HANDLE OLD VERSION 2 3 91 5745 HANDLE NEW VERSION 2 4 91 6492 LATCH NEW VERSION 2 ...

Page 33: ... List ITEM PART NO DESCRIPTION QTY 1 91 7386 OUTER DOOR 1 2 91 7387 INNER DOOR 1 3 91 7388 GASKET RETAINING PLATE 1 4 91 7389 DOOR GASKET 1 5 91 5745 DOOR HANDLE 1 6 09 1608 STRIKER 1 7 08 5027 MAGNET 1 8 91 5901 MAGNET BRACKET 1 9 08 4600 COMPRESSION SPRING 2 ...

Page 34: ... Panel Assembly Parts List ITEM PART NO DESCRIPTION QTY 1 98 1616 CONTROL PANEL 1 2 98 1612 LEXAN CONTROL PANEL 1 3 08 6464 60 MINUTE TIMER 2 4 08 6541 TERMINAL STRIP 2 5 91 6471 BRACKET TERMINAL STRIP 2 6 10 7395 BUZZER 2 7 08 3826 KNOB TIMER 2 8 10 5052 LIGHT RED 2 ...

Page 35: ... 1477 COUPLER BRASS BARB 3 8 X 3 8 NPT 1 6 08 6581 TEE MALE 1 2 NPT X FEMALE 1 2 BRANCH 1 7 10 3739 1 2 X 3 8 REDUCING BUSHING 1 8 98 1630 WELDMENT COLD H20 STEAM VALVE 1 9 10 1055 TEE 3 8 ALL ROUND 1 10 10 3644 PLUG SQUARE HEAD 3 8 IPS BRASS 1 11 08 7525 MIPPLE CLOSED 3 8 NPT BRASS 2 12 08 6498 VALVE 3 8 NPT COLD WATER CONDENSER 1 13 08 4912 COUPLER BARB 5 8 OD X 1 2 IPS 1 14 08 7962 COUPLER BARB...

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