SERVICE MANUAL
Contents
1. Page 14 of 16 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 Monitors thermostat probe and cycles power to heating element High Limit Thermostat Protects griddle top by cutting power to heating element if temperature goes above 624 F Heating Element Heat source for griddle top WIRING DIAGRAM 208 240V SINGLE PHASE HEATING ELEMENT HIGH LIMIT TR LIGHT TERMOSTAT EJ E sS D y I a TERMOSTAT PROBE Al 3336 Page 15 of 16 F25446 January 2012 GTS12 GRIDDLE TOP TROUBLESHOOTING TROUBLESHOOTING Po symptom POSSIBLECAUSE 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 3 Thermostat set too low 4 High limit is opened 5 Power switch malfunction 6 Thermostat malfunction 7 Heating element malfunction Heat does not come on when 1 Power switch not in the ON position thermostat is turned ON 2 High limit cutoff switch is tripped depress reset button 3 Power not supplied to unit 4 Power switch malfunction 5 Thermostat malfuncti2. 173A contained in this manual are based on the latest 6TS12 1 3 6 kW 173A product information available at the time of printing GTS12 2 3 6 kW MODELS GTS12 3R 208 V 3 6 kW 173A GTS12 1 208V Front Grease Trough GTS12 4R 240 V 3 6 kW GTS12 2 240V Front Grease Trough GTS12 3R 208V Rear Grease Trough GTS12 4R 240V Rear Grease Trough INSTALLATION OPERATION amp CLEANING Refer to the Operation and Field Installation Manual F38300 for specific installation operation and cleaning instructions TOOLS Standard Standard set of hand tools Metric set of hand tools e VOM with A C current tester any quality VOM with a sensitivity of at least 20 000 ohms per volt can be used Special e Temperature tester thermocouple type e Torque wrench in lb Clamp on type amp meter Page 3 of 16 F25446 January 2012 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS REMOVING GRIDDLE TOP FROM FRAME lt electrical power to the machine and follow lockout tagout procedures Ly gt A WARNING Disconnect the S SS SS ES NOTE Make sure that griddle top and griddle are cool before servicing 1 Place cardboard or other protective covering on griddle surface to prevent scratching MOUNTING BRACKET BRACKET 2 Remove 6 screws and move back cover out of the way A Remove mounting support b
3. EMENT OF PARTS 3 Disconnect power cord from terminal block 4 Remove back cover 5 Transfer spring to replacement power cord 6 Install retaining grommet onto new power cord 19 from tip of ring terminals Install power cord Check for proper operation HIGH LIMIT CUTOFF SWITCH A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 REMOVE GRIDDLE TOP FROM FRAME Remove TOP COVER Remove 4 screws and move INNER LINER out of the way 4 Remove electrical connections from control thermostat and high limit noting their location 5 Disconnect heating element wires from terminal block F25446 January 2012 DISCONNECT ug 23832 6 Pull off thermostat knob and remove 2 screws Remove control thermostat body from inner liner HIGH LIMIT RESET BUTTON 7 Remove jam nut from around high limit reset button Remove high limit switch body from inner liner 8 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 GROUND WIRES 9 Carefully separate upper arm assembly from cooking head assembly NOTE Be careful not to damage or pull the thermostat and high limit probes that are still attached in the cooking head Page 6 of 16 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS 10 For ease in servicing remove knockout
4. 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 TABLE OF CONTENTS TABLE OF CONTENTS GENERAL sires viandantes aa dt wld 3 INTOUCHON eaei nenia ai E gal Panwa Boke A REA TE AAN Tae RAR age O ENE 3 Installation Operation 8 Cleaning 0 02 00 ccc tees 3 TOS il a Snail tan Ban oa aan e asa A needle da Pie A nus e aT EAN EAA 3 Specification S e ea crise OR aot eet Rieke cued Roe PN ai abe Ra
5. ace a lock washer on each element stud then finger tighten a flange nut on each lock washer 6 Starting in the center of the element tighten each row of flange nuts to 20 in lbs in the following order 3 Remove trigger from pins 4 Reverse procedure to install A Orient plate nuts so that groove is on top and rounded corner is towards handle Trigger Mechanism Removal 1 Remove trigger 2 Remove e clips and pins 7 Install a top nut on each flange nut and torque to 20 in lbs 8 Reinstall insulation panel insulation frame and high limit probe PIN NOTE Only tighten nuts to 1 2 turn past finger tight Over tightening can fracture the insulation panel 9 Reverse removal procedure to install A Bend up edges of locking washer to prevent universal joint hex screws from TIE BAR Some Soe backing out 10 Check for proper operation 3 Disengage tie bars 4 Unseat snap ring on one end then push in other end of mechanism to remove Page 11 of 16 _ F25446 January 2012 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS 5 Reverse procedure to install Removing Mechanism From Arm Body 1 REMOVE GRIDDLE TOP FROM FRAME 2 Remove TOP COVER and INNER LINER 3 Remove e clips and pins Disengage tie bars PIN 4 Remove power cord from terminal block and remove back cover A Remove 4 bolts from weld nuts 5 Remove mechanism f
6. e 16 jam nut flange nut lock washer stacks securing pressure plate to heating element 10 Remove all 12 screws around perimeter of cooking head assembly cover and 4 screws in the center around the universal joint Separate cover from cooking head assembly NUTS 16 PLACES 15 Remove pressure plate and heating element 16 Remove the old cover gasket 17 Remove thermostat probe from ceramic insulation strip in plate groove 11 Remove high limit probe and ground wire from insulation panel frame CERAMIC Replacement HIGH LIMIT PROBE 1 Ensure plate surface is clean and free of any particles or defects that may prevent contact between the heating element and plate 12 Remove 4 center spacers and 12 nuts securing insulation panel frame to heating element 2 Install control thermostat probe into groove of plate with the ceramic insulation strip in place above it F25446 January 2012 1 Page 10 of 16 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS 3 Install new cover gasket ARM MECHANISM 4 Seat new heating element in place A Transfer protective sleeve to new element wires A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures Trigger Removal 1 Remove TOP COVER and move INNER LINER out of the way 2 Remove bolts washers and plate nuts 5 Install pressure plate and pl
7. in upper backing out arm assembly Pass high limit and control thermostat through NOTE Plastic ring must be used during reassembly CONTROL THERMOSTAT 15 Check for proper operation Disconnect the electrical power to the machine and follow lockout tagout procedures REMOVE GRIDDLE TOP FROM FRAME 2 Remove TOP COVER Remove 4 screws and move INNER LINER out of the way 4 Remove electrical connections from control thermostat and high limit noting their location A Disconnect heating element wires from 11 Remove all 12 screws around perimeter of terminal block cooking head assembly cover and 4 screws in the center around the universal joint Separate cover from cooking head assembly DISCONNECT __ su 23832 12 Remove nuts and washers holding high limit 5 Pull off thermostat knob and remove 2 screws probe to insulation panel frame Remove control thermostat body from inner liner HIGH LIMIT HIGH LIMIT PROBE JAM NUT 23834 13 Remove high limit switch from griddle top 6 Remove jam nut from around high limit reset button Remove high limit switch body from 14 Reverse procedure to install inner liier A Bend up edges of locking washer to prevent universal joint hex screws from Page 7 of 16 _ F2446 January 2012 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS 7 Disconnect cooking head assembly ground wires and remove 2 hex screws securing universa
8. k Bie Lickth aE Rewer Oty hives rol 3 REMOVAL AND REPLACEMENT OF PARTS 00000 cece eee eee teeta 4 Removing Griddle Top from Frame serice redi ters rerh Eere teas 4 Coversiand Panels a A Be AA AI e ee ee ee 5 Lighted Switch Assembly ee ninaa ia a e ee eee teen 5 Power Cord sit aoni 2a cid Pre A ie A ee See ie Re 5 High Limit Cutoff Switch si eiie a a a a E neta 6 Control Thermostat cra a o a aaa 7 Heating Element Vio A AAA 9 ArmiMeChanisit coran a AA a A AE A A 11 SERVICE PROCEDURES AND ADJUSTMENTS coco 13 Down Force Adjustment s si nees eaa a a ee ee E nee ee eee eee nes 13 Control Thermostat Test 13 Heating Element TeSt c4 623244 80 A BA Boe Bg a A 14 ELECTRICAL OPERATION vta pail cea o ee beak Sed coal ation Bee Ge 15 Component Function 2062 ned rras oy oe ade ee he eae ON ema oe en Seas Oe mo ee Anas Dee 15 Wiring Diagrams eiee A oe ae pate eee be ava al ee ae ew he aa ie otha pe a 15 TROUBLESHOOTING ii iea co nee eae ood La ee Bei ad nate eke ee 16 Vulcan 2012 F25446 January 2012 Page 2 of 16 GTS12 GRIDDLE TOP GENERAL GENERAL INTRODUCTION SPECIFICATIONS This manual is for the GTS12 Heavy Duty Electric Griddle Top Procedures in this manual will apply to A Oi all models unless specified Pictures and illustrations Model No 4 Phase will be of model GTS12 1 unless otherwise noted Draw All of the information illustrations and specifications aeKw
9. l joint to upper arm body NOTE Bend down edges of locking washer A Oe a AT MB TU Un Cx al NS A GROUND WIRES 8 Carefully separate upper arm assembly from cooking head assembly NOTE Be careful not to damage or pull the thermostat and high limit probes that are still attached in the cooking head 9 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 10 Remove all 12 screws around perimeter of cooking head assembly cover and 4 screws in the center around the universal joint Separate cover from cooking head assembly F25446 January 2012 2 i SCREW ee 12 PLACES 11 Remove high limit probe and ground wire from insulation panel frame HIGH LIMIT PROBE 12 Remove 4 center spacers and 12 nuts securing insulation panel frame to heating element 13 Remove insulation panel frame and insulation panel 14 Remove 16 jam nut flange nut lock washer stacks securing pressure plate to heating element Page 8 of 16 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 CERAMIC INSULATION STRIP 17 Remove control thermostat from griddle top 18 Reverse procedure to install A Bend up edges of locking washer t
10. o prevent universal joint hex screws from backing out 19 Check for proper operation HEATING ELEMENT A WARNING Disconnect the electrical power to the machine and follow lockout tagout procedures 1 REMOVE GRIDDLE TOP FROM FRAME 2 Remove TOP COVER 3 Remove 4 screws and move INNER LINER out of the way 4 Remove electrical connections from control thermostat and high limit noting their location A Disconnect heating element wires from terminal block DISCONNECT WE 23832 Pull off thermostat knob and remove 2 screws Remove control thermostat body from inner liner HIGH LIMIT Remove jam nut from around high limit reset button Remove high limit switch body from inner liner 7 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 GROUND WIRES 8 Carefully separate upper arm assembly from cooking head assembly NOTE Be careful not to damage or pull the thermostat and high limit probes that are still attached in the cooking head Page 9 of 16 F25446 January 2012 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS 9 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 14 Remov
11. on 6 Heating element malfunction Unit will not lock or remain in the 1 Lift by lower handle only Do not squeeze upper and lower raised position handles together when raising 2 Not raising high enough Unit will only lock at the 47 and 90 position 3 Problem with locking mechanism or handles Unit will not lower from the raised or 1 Lift slightly to take weight off then squeeze the upper and lower locked position handles together while lowering the unit 2 Problem with locking mechanism Unit will not raise from the cooking or 1 Problem with locking mechanism lowered position 2 Check that power cord is not binding Food under cooked 1 Temperature set too low 2 Food issue see operator manual 3 Cooking surface not touching or partially touching food when in the lowered position Tension springs need to be adjusted Food over cooked 1 Temperature set too high 2 Food cooked for too long of a time 3 Cooking surface pressing down too hard when in the lowered position Tension springs need to be adjusted Food is being crushed 1 Cooking surface pressing down too hard when in the lowered position Tension springs need to be adjusted Food sticks to cooking surface 1 Temperature set too high or too low 2 Cooking surface needs to be cleaned 3 Cooking surface not covered with enough cooking oil Form 25446 January 2012 PRINTED IN USA
12. racket and mounting bracket 6 Remove 2 upper bolts A Remove mounting support bracket and mounting bracket 7 Remove griddle top from frame 8 Reverse procedure to install 9 Check for proper operation 3 4 Remove 2 nuts spring guide bracket and 2 springs F25446 January 2012 Page 4 of 16 GTS12 GRIDDLE TOP REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS 2 Remove 4 screws and move INNER LINER out of the way Ve 3 Remove electrical connections noting their x A WARNING Disconnect the eaten ey lt electrical power to the machine and gt follow lockout tagout procedures Top Cover 1 Remove 7 screws and top cover TOP COVER 4 Pinch clips and push lighted switch assembly through 2 Reverse procedure to install Inner Liner 1 Remove TOP COVER 2 Remove 4 screws securing inner liner 5 Reverse procedure to install NOTE Ensure that terminal connections are completely seated and tight 6 Check for proper operation POWER CORD 3 Reverse procedure to install __LIGHTED SWITCH ASSEMBLY _ q Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove TOP COVER 2 Remove 4 screws and move INNER LINER out 1 Remove TOP COVER of the way Page 5 of 16 F25446 January 2012 GTS12 GRIDDLE TOP REMOVAL AND REPLAC
13. rom arm body 6 Reverse procedure to install Locking Plate Replacement 1 REMOVE GRIDDLE TOP FROM FRAME F25446 January 2012 2 Remove mechanism from arm body 3 Remove slotted bolts from both sides 4 Pull rods and remove springs 5 Slide out locking plate 6 Reverse procedure to install Page 12 of 16 GTS12 GRIDDLE TOP SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS Certain procedures in this section require electrical test or measurements lt while power is applied to the machine Exercise extreme caution at all times If test points are not easily accessible disconnect power and follow lockout tagout procedures attach test equipment and reapply power to test DOWN FORCE ADJUSTMENT CONTROL THERMOSTAT TEST 1 Remove 6 screws and back cover 1 Mount temperature tester probe in center of griddle top plate 8 down from the top edge 2 Turn griddle top on and set to 350 F Allow thermostat to cycle 3 times to preheat 3 Record temperature when indicator light turns ON and OFF Repeat for 3 cycles 4 Calculate the temperature differential Differential Indicator Light OFF Indicator Light ON Example 365 340 25 F differential A Differential should be less than 50 F B If differential is greater than 50 F replace control thermostat 5 Calculate the average temperature 2 Tighten decreases down force or loosen Average Temperal
14. ute increases down force both nuts evenly Indicator Light OFF Indicator Light ON 7 2 Example 365 345 710 2 355 F 6 If average temperature differs more than 50 F from the dial setting replace control thermostat 3 Reinstall back cover once desired down force is achieved Page 13 of 16 _ _ F 25446 January 2012 GTS12 GRIDDLE TOP ELECTRICAL OPERATION HEATING ELEMENT TEST 1 Measure voltage at heating element leads and verify against data plate voltage A If voltage is incorrect find the source of the problem B If voltage is correct check current draw amps through the heating element lead wires NOTE This method is preferred over a resistance check when a clamp on type amp meter is available 2 If current draw is correct then heating element is functioning properly See table below for proper values 3 If current draw is not correct turn griddle top OFF and disconnect the electrical supply A Replace heating element then proceed to step 5 4 If unable to check current draw a resistance check may indicate a malfunctioning element A Disconnect electrical supply and remove lead wires from heating element Check resistance ohms See table below for proper values 5 Check for proper operation Values in table are nominal Tolerance is 5 10 Resistance values ohms are 77 F room temperature F25446 January 2012
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