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SERVICE MANUAL
GTS12 HEAVY DUTY ELECTRIC
GRIDDLE TOP
GTS12
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly qualified.
This manual is not intended to be all encompassing. If you have not
attended a Vulcan Service School for this product, you should read,
in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do not
have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
The reproduction, transfer, sale or other use of this Manual, without
the express written consent of Vulcan, is prohibited.
This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.
A product of VULCAN
Baltimore, MD 21222
F25446 (January 2012)
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Summary of Contents for Vulcan-Hart GTS12
- Page 1 SERVICE MANUAL GTS12 HEAVY DUTY ELECTRIC GRIDDLE TOP GTS12 This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified. This manual is not intended to be all encompassing. If you have not...
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Page 2: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS GENERAL ................3 Introduction . -
Page 3: General
GTS12 GRIDDLE TOP - GENERAL GENERAL INTRODUCTION SPECIFICATIONS This manual is for the GTS12 Heavy Duty Electric ELECTRICAL SPECIFICATIONS Griddle Top. Procedures in this manual will apply to all models unless specified. Pictures and illustrations Model No. Voltage Power 1 Phase will be of model GTS12-1 unless otherwise noted. -
Page 4: Removal And Replacement Of Parts
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS REMOVING GRIDDLE TOP FROM FRAME NOTE: Make sure that griddle top and griddle are cool before servicing. Place cardboard or other protective covering on griddle surface to prevent scratching. -
Page 5: Covers And Panels
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS Remove 4 screws and move INNER LINER out COVERS AND PANELS of the way. Remove electrical connections, noting their locations. Top Cover Remove 7 screws and top cover. Pinch clips and push lighted switch assembly through. -
Page 6: High Limit Cutoff Switch
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS Disconnect power cord from terminal block. Pull off thermostat knob and remove 2 screws. Remove control thermostat body from inner Remove back cover. liner. Transfer spring to replacement power cord. Install retaining grommet onto new power cord 19"... -
Page 7: Control Thermostat
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS 10. For ease in servicing, remove knockout in upper backing out. arm assembly. Pass high limit and control 15. Check for proper operation. thermostat through. CONTROL THERMOSTAT NOTE: Plastic ring must be used during reassembly. - Page 8 GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS Disconnect cooking head assembly ground wires and remove 2 hex screws securing universal joint to upper arm body. NOTE: Bend down edges of locking washer. 11. Remove high limit probe and ground wire from insulation panel frame.
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Page 9: Heating Element
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS 15. Remove pressure plate and heating element. 16. Remove thermostat probe from ceramic insulation strip in plate groove. Pull off thermostat knob and remove 2 screws. Remove control thermostat body from inner liner. - Page 10 GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS For ease in servicing, remove knockout in upper arm assembly. Pass high limit and control thermostat through. NOTE: Plastic ring must be used during reassembly. 13. Remove insulation panel frame and insulation panel.
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Page 11: Arm Mechanism
GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS Install new cover gasket. ARM MECHANISM Seat new heating element in place. Transfer protective sleeve to new element wires. Trigger Removal Remove TOP COVER and move INNER LINER out of the way. - Page 12 GTS12 GRIDDLE TOP - REMOVAL AND REPLACEMENT OF PARTS Remove mechanism from arm body. Remove slotted bolts from both sides. Reverse procedure to install. Removing Mechanism From Arm Body REMOVE GRIDDLE TOP FROM FRAME. Pull rods and remove springs. Remove TOP COVER and INNER LINER.
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Page 13: Service Procedures And Adjustments
GTS12 GRIDDLE TOP - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS DOWN FORCE ADJUSTMENT CONTROL THERMOSTAT TEST Remove 6 screws and back cover. Mount temperature tester probe in center of griddle top plate, 8" down from the top edge. -
Page 14: Heating Element Test
GTS12 GRIDDLE TOP - ELECTRICAL OPERATION HEATING ELEMENT TEST Measure voltage at heating element leads and verify against data plate voltage. If voltage is incorrect, find the source of the problem. If voltage is correct, check current draw (amps) through the heating element lead wires. -
Page 15: Electrical Operation
GTS12 GRIDDLE TOP - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Lighted Switch Assembly ..On/Off switch turns griddle top ON and OFF. Indicator light signals when power is being cycled to heating element. Control Thermostat .. -
Page 16: Troubleshooting
GTS12 GRIDDLE TOP - TROUBLESHOOTING TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE Heat does not come on when power 1. If power switch in not illuminated, check breaker panel and main switch is turned ON. power supply. 2. High limit cutoff switch is tripped - depress reset button.