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SERVICE MANUAL
GR SERIES GAS FRYERS WITH
MILLIVOLT CONTROLS
MODEL ML MODEL ML
GR25 126988 GR35F 126998
GR35 126989 GR45F 126999
GR45 126990 GR65F 135534
GR65 126991 GR85F 135535
GR85 126992
GR35 SHOWN
- NOTICE -
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified. If you have attended a Vulcan Service School for this
product, you may be qualified to perform all the procedures
described in this manual.
This manual is no
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GR SERIES GAS FRYERS TABLE OF CONTENTS GENERAL ................................................................................ 3 Introduction ............................................................................ 3 Single Floor Model or Battery Fryers ........................................................ 3 Model Designations ................................................................. 3 Models and Features ................................................................ 3 Kleenscr
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GR SERIES GAS FRYERS - GENERAL GENERAL INTRODUCTION This Service Manual covers specific service information related to the models listed on the front cover. SINGLE FLOOR MODEL OR BATTERY FRYERS Fryers with the Filter-Ready option installed, use the Mobile Filter. For service information related to the Mobile Filter, refer to F24599 MOBILE FILTERS. Filter-Ready fryers are available as single floor models only. The information in the GR Series Service Manual also applies to Non-Filter Ready fryers
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GR SERIES GAS FRYERS - GENERAL The Kleenscreen fryer battery still utilizes many of KLEENSCREEN FILTERING the same components as the single floor model and SYSTEM Non-Filter ready battery fryers. Kleenscreen fryer batteries are available in a The new Kleenscreen filtering system has been minimum of two and a maximum of six fryer integrated into the GR Series fryer battery. The filter sections. The fryer size of each section is identical. is housed in a pull-out drawer assembly at the base of th
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS Input BTU Rating SPECIFICATIONS NO. OF GR SERIES BTU/HR/SECTION Electrical TUBES • 120VAC supply for Filter-Ready fryers and GR25, GR25F 2 60,000 Kleenscreen filter models only. The filter pump motor draws approximately 5 amps. GR35, GR35F 3 90,000 Gas Pressures GR45, GR45F 4 120,000 Manifold (per fryer section): GR65, GR65F 5 150,000 • Natural - 4" W.C. GR85, GR85F 5 150,000 • Propane - 10" W.C. Building supply pressure (Min): TOOLS • Nat
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 2. When replacing door, install screws and tighten 6. Remove screws securing capillary tube top and bottom screws enough to hold door in mounting clips to the fry tank heat tube then place. remove capillary tube. 3. Close door, check alignment and adjust if necessary. 4. Finish tightening screws to fully secure. CONTROL THERMOSTAT WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. CAUTION: Do no
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 5. Remove the capillary tube retaining and packing nuts, from the bottom of fry tank. 6. Remove screws securing capillary tube mounting clips to the fry tank heat tube then remove capillary tube. 3. Lift main burner up and tilt the top of burner toward fry tank until it clears the gas orifice at the bottom. A. Lift main burner from fryer. 7. Reverse procedure to install. MAIN BURNERS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS GAS COMBINATION VALVE WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. WARNING: SHUT OFF THE GAS BEFORE SERVICING THE UNIT. WARNING: ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS. CHECK WITH A SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME. NOTE: Gas combination valves are not serviceable and should not be disassembled. Once the problem has been isolated to t
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 6. Reverse procedure to install and check for proper operation. PILOT BURNER WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. WARNING: SHUT OFF THE GAS BEFORE SERVICING THE UNIT. WARNING: ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS. CHECK WITH A SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME. 1. Remove burners (as necessary) as outlined under MAIN BURNERS.
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 8. Remove pilot burner as outlined under PILOT BURNER. 9. Remove control thermostat as outlined under CONTROL THERMOSTAT. 10. Remove high limit thermostat as outlined under HIGH LIMIT THERMOSTAT. 11. Remove gas manifold and hanger assembly from the fryer. A. For fryer sections above the filter drawer assembly on battery fryers or single floor model fryers (filter ready), remove mounting nuts securing gas manifold and hanger assembly to the
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GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 21. Reverse procedure to install all the parts NOTE: The remaining steps are written for front removed from original fry tank onto removal of the pump assembly. If access to the back replacement fry tank, then install the assembly. of the fryer is available, it may be easier to remove the pump from the rear. FILTER VALVE AND DISCARD 3. Remove burners from the right side fryer VALVE SWITCHES section above filter tank drawer as outlined unde
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GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS 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. A. If the average temperature reading is CONTROL THERMOSTAT within tolerance, the control thermos
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GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS GAS MANIFOLD PRESSURE ADJUSTMENT WARNING: SHUT OFF THE GAS SUPPLY BEFORE SERVICING THE UNIT. GAS PRESSURE (INCHES W.C.) LINE GAS MANIFOLD TYPE RECOMMENDED MIN MAX Natural 4 7 5 14 Propane 10 11 11 NOTE: If the incoming line pressure is less than the minimum stated, then the manifold pressure cannot be set correctly. NON FILTER READY SHOWN 1. Open the door and turn gas combination valve knob/extension arm to off. A. To increase pressure,
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GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS A. If adjustment is necessary, continue with MILLIVOLT CONTROLS TEST procedure. 1. Verify millivolt control circuit wiring is correct and connections are clean and secure. 2. Verify pilot burner flame is adjusted properly as outlined under PILOT BURNER FLAME ADJUSTMENT. 3. With control thermostat off and gas combination valve knob/extension arm in the pilot position, allow pilot to burn for 3-4 minutes to stabilize voltage output from the
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION FRYER CONTROLS Control Thermostat ........... Regulates shortening temperature at the selected set point. Temperature range from off to 200 /F thru 400 /F. Thermopile .................. When heated by the pilot burner flame, generates DC millivolts to energize pilot valve coil and main valve coil on the gas combination valve. Gas Combination Valve ....................... Allows gas flow to the pilot when pilot va
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION COMPONENT LOCATION GR35 NON FILTER READY SHOWN GR45 FILTER READY SHOWN 2GR45F KLEENSCREEN FRYER BATTERY SHOWN F25125 (March 2003) Page 16 of 24
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION 1. Conditions SEQUENCE OF OPERATION A. Fryer connected to correct supply voltage Millivolt Controls and is properly grounded. Refer to schematic diagram 7825. B. Shortening between 300 /F and 350 /F. 1. Conditions. NOTE: Oil should not be filtered outside of this temperature range. At lower temperatures the A. Gas shutoff valve(s) on and gas oil is thicker which may increase filtering time combination valve knob/extension arm in and place a greater lo
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION SCHEMATIC DIAGRAM Millivolt Controls F25125 (March 2003) Page 18 of 24
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION WIRING DIAGRAMS Millivolt Controls F25125 (March 2003) Page 19 of 24
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GR SERIES GAS FRYERS - ELECTRICAL OPERATION Junction Box, Kleenscreen Filtering System F25125 (March 2003) Page 20 of 24
