Vulcan-Hart GRC35 Service Manual
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Vulcan-Hart GRC35 Service Manual

Gr series gas fryers with tridelta controls
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See also: Operation & Installation Manual
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 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.
Reproduction or other us e of this Manual, without the express written consent
of Vulcan, is prohibited.
For additional information on Vulcan-Hart Company or to locate an authorized parts and
service provider in your area, visit our website at www.vulcanhart.com.
VULCAN-HART COMPANY, P.O. BOX 696, LOUISVILLE, KY 40201-0696, TEL. (502) 778-2791
SERVICE MANUAL
GR SERIES GAS FRYERS WITH
TRIDELTA CONTROLS
MODEL
GRD25
052513
GRD35
052080
GRD45
052081
GRD65
052082
GRD85
052306
GRC35
052083
GRC45
052084
GRC65
052085
GRC85
052307
- NOTICE -
ML
MODEL
GRD35F
GRD45F
GRD65F
GRD85F
GRC35F
GRC45F
GRC65F
GRC85F
FORM 25114 Rev.A (07-03)
ML
126732
126735
126738
126741
126733
126736
126739
126742

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Summary of Contents for Vulcan-Hart GRC35

  • Page 1 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.

  • Page 2: Table Of Contents

    GENERAL ... 4 Introduction ... 4 Single Floor Model Fryers ... 4 Model Designations ... 4 Models, Features and Options ... 4 Kleenscreen Filtering System ... 5 Model Designations ... 5 Models, Features and Options ... 5 Specifications ... 6 Electrical ...
  • Page 3 Computer Control ... 25 Operation ... 25 Service Programming ... 25 Error messages ... 25 Enter Service Mode ... 25 Display, Led and Keypad Test ... 26 ELECTRICAL OPERATION ... 27 Component Function ... 27 Component Location ... 29 Power Supply Box ... 30 Sequence of Operation ...

  • Page 4: General

    WIDTH CAPACITY (INCHES) (POUNDS) GRD25 10 1/2 25-30 GRD35 15 1/2 35-40 GRD45 15 1/2 45-50 GRD65 65-70 GRD85 85-90 GRC35 15 1/2 35-40 GRC45 15 1/2 45-50 GRC65 65-70 GRC85 85-90 RO15 15 1/2 (Frymate) RO21 (Frymate) RO21S (Frymate) NOTE: 1.

  • Page 5: Kleenscreen Filtering System

    21 inches to the width. The fryer battery still utilizes many of the same components as the Vulcan GR series fryers. Kleenscreen fryer batteries are available in a minimum of two and a maximum of six fryer sections. The fryer size of each section is identical.

  • Page 6: Specifications

    • Propane - 11" W.C. (12" W.C. battery units) NOTE: Propane or Natural gases -14" W .C. (Max). Input BTU Rating NO. OF GR SERIES TUBES GRD25 GRD35, GRC35 GRD45, GRC45 GRD65, GRC65 GRD85, GRC85 TOOLS Standard • Standard set of hand tools.

  • Page 7: Control Panels

    GR SERIES GAS FRYERS - GENERAL CONTROL PANELS Solid State • Five product/programming keys: Left basket (up arrow); Right basket (down arrow); Temperature; Program and Boil. • Four digit display window that indicates fryer status, time left to cook, and actual or set point temperature. •...

  • Page 8: Removal And Replacement Of Parts

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. Control Panel 1.

  • Page 9: Cooking Controls

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS COOKING CONTROLS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. CAUTION: Certain components in this system are subject to damage by electrostatic discharge during field repairs.

  • Page 10: Filter Valve And Discard Valve Switches

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS FILTER VALVE AND DISCARD VALVE SWITCHES WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. 1.

  • Page 11: Gas Orifice

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS GAS ORIFICE WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. WARNING: SHUT OFF THE GAS BEFORE SERVICING THE UNIT.

  • Page 12: Temperature Probe

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 5. Remove screws securing gas pilot to mounting bracket and remove pilot. GAS PILOT FOR ELECTRONIC IGNITION SHOWN A. To remove gas orifice from pilot for inspection or cleaning, disconnect the gas orifice fitting from pilot body.

  • Page 13: High Limit Thermostat

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 6. Remove screws securing probe mounting clips and probe to the fryer heat tube (inside tank) then remove probe. 7. Reverse procedure to install. 8. Check cooking controls calibration as outlined in “COOKING CONTROL CALIBRATION”...

  • Page 14: Power Supply Box

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 7. Reverse procedure to install. POWER SUPPLY BOX WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. WARNING: SHUT OFF THE GAS BEFORE SERVICING THE UNIT.

  • Page 15: Basket Lift Tube

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 4. Reverse procedure to install and check for proper operation. BASKET LIFT TUBE WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED.

  • Page 16: Basket Lift Cam Switch

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS 5. Remove screws securing basket lift motor to cam bracket, then remove motor from bracket. 6. Reverse procedure to install and check for proper operation. NOTE: After reinstalling motor keep all wire leads clear from moving parts.

  • Page 17: Basket Lift Cam

    GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS BASKET LIFT CAM WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. THERE MAY BE MULTIPLE CIRCUITS. BE SURE ALL CIRCUITS ARE DISCONNECTED. 1. Remove basket lift cover as outlined in “BASKET LIFT COVERS”...
  • Page 18 GR SERIES GAS FRYERS - REMOVAL AND REPLACEMENT OF PARTS On battery fryer sections only, remove bolts securing the drain pipe flange to the manual drain valve. Disconnect temperature probe and drain valve interlock switch (DVI) connector (6 pin) on the left. Disconnect the following lead wire connectors: main control harness (right);...

  • Page 19: Service Procedures And Adjustments

    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, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

  • Page 20: Electronic Ignition System

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS A. If the average temperature reading is within tolerance, cooking control is properly calibrated. B. If the average temperature reading is out of tolerance, perform the following: 1) Solid State Control - Adjust the offset temperature accordingly as outlined in “SOLID STATE CONTROL”...

  • Page 21: Electronic Ignition Control Test

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS 4. Set VOM to micro amp scale (DC) and connect meter leads at the same terminals. Negative (-) meter lead to the asterisk (*) terminal and positive meter lead to terminal 8. 5.

  • Page 22: Gas Manifold Pressure Adjustment

    B. If gas pilot lights but does not maintain an adequate flame during the trial for ignition (90 sec.), check pilot orifice for clogging. CAUTION: If orifice is clogged with debris, clean with air or liquid only. C. If spark from ignitor is present but does not ignite pilot gas before the ignition control module locks out, there may not be enough gas in the line for ignition.

  • Page 23: Basket Lift Arm Adjustment

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS BASKET LIFT ARM ADJUSTMENT 1. With frying oil at room temperature, verify the oil level is between MIN & MAX lines in fry tank. Add frying oil as needed. NOTE: Frying oil will expand when heated. Do not fill the fry tank past the MAX line.

  • Page 24: Solid State Control

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS SOLID STATE CONTROL Operation Refer to the Installation & Operations manual for specific operating instructions. Error messages For information on solid state control error messages, refer to “SOLID STATE CONTROL” under “TROUBLESHOOTING”.

  • Page 25: Computer Control

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS COMPUTER CONTROL Operation Refer to the Installation & Operations manual for specific operating instructions. Service Programming The computer control’s “service programming” mode is used to perform system diagnostic tests or edit “program items” that affect the fryers operation.

  • Page 26: Display, Led And Keypad Test

    GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS Display, Led and Keypad Test 1. Press and hold the “5” key while turning power on to Initiate test. Release the “5” key during display of software revision level. 2. For each number key (1-9, & 0) pressed, the corresponding value is displayed in each character position on the left and right display.

  • Page 27: Electrical Operation

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Solid State or Computer Cooking Controls (“D” or “C” Models) ... Monitors and evaluates input signals to the control. Controls the cooking Control Interface Board ... Provides the output signal interface from the cooking control, to regulate Transformer ...
  • Page 28 GR SERIES GAS FRYERS - ELECTRICAL OPERATION KLEENSCREEN FILTER CONTROLS Filter Power Switch ... Supplies 120VAC to pump motor. Filter valve switch or discard valve Pump Motor ... Operates pump to circulate frying oil through filtering system. Filter Valve Switch ... Energizes pump motor to filter the frying oil when switch is closed (valve Discard Valve Switch ...

  • Page 29: Component Location

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION COMPONENT LOCATION – 29 – F-25114 Rev.A (07-03)

  • Page 30: Power Supply Box

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION POWER SUPPLY BOX – 30 – F-25114 Rev.A (07-03)

  • Page 31: Sequence Of Operation

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION SEQUENCE OF OPERATION Solid State or Computer, Cooking Control Refer to schematic diagram 7411 for Cooking Control operation. FRY CYCLE - LIQUID FRYING OIL If using solid shortening, the control should be programmed to use the MELT CYCLE. In the MELT CYCLE, the control will “cycle”...

  • Page 32: Kleenscreen Filtering System

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION 6. Cooking control cycles heat output on frying oil temperature until power switch is turned off; Ignition input status is removed; Drain valve interlock input status is removed; temperature probe input is outside acceptable limits or a high limit condition occurs.
  • Page 33 GR SERIES GAS FRYERS - ELECTRICAL OPERATION F. When the oil filtering process is completed, close the manual drain valve to the fryer and allow the fry tank to refill. NOTE: Drain valve interlock contacts close and the position of the drain valve is indicated to the cooking control.

  • Page 34: Schematic Diagrams

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION SCHEMATIC DIAGRAMS Electronic Ignition, Solid State or Computer Control – 34 – F-25114 Rev.A (07-03)

  • Page 35: Manual Pilot Ignition, Solid State Or Computer Control

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION Electronic Ignition, Solid State or Computer Control – 35 – F-25114 Rev.A (07-03)

  • Page 36: Wiring Diagrams

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION WIRING DIAGRAMS Electronic Ignition, Solid State or Computer Control – 36 – F-25114 Rev.A (07-03)
  • Page 37 GR SERIES GAS FRYERS - ELECTRICAL OPERATION – 37 – F-25114 Rev.A (07-03)
  • Page 38 GR SERIES GAS FRYERS - ELECTRICAL OPERATION Manual Pilot Ignition, Solid State or Computer Control – 38 – F-25114 Rev.A (07-03)
  • Page 39 GR SERIES GAS FRYERS - ELECTRICAL OPERATION – 39 – F-25114 Rev.A (07-03)

  • Page 40: Junction Box, Kleenscreen Filtering System

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION Junction Box, Kleenscreen Filtering System – 40 – F-25114 Rev.A (07-03)

  • Page 41: Frymate (Dump Station)

    GR SERIES GAS FRYERS - ELECTRICAL OPERATION Frymate (Dump Station) – 41 – F-25114 Rev.A (07-03)

  • Page 42: Troubleshooting

    GR SERIES GAS FRYERS - TROUBLESHOOTING ALL MODELS SYMPTOMS No spark to ignite pilot gas; Display lit. Sparks but gas does not ignite; Display lit. Gas pilot ignites but will not maintain flame. Gas burner(s) ignite but will not maintain flame. Excessive or low heat.

  • Page 43: Solid State Control

    GR SERIES GAS FRYERS - TROUBLESHOOTING SOLID STATE CONTROL The following alarms take precedence over any other controller mode or function (except drain valve open). ALARMS OPEN PROBE SHORTED PROBE HI TEMPERATURE IGNITION STATUS DRAIN VALVE INTERLOCK (DVI) DESCRIPTION If an open probe is detected, the heat demand (heat on) and basket lift outputs are disabled.

  • Page 44: Computer Control

    GR SERIES GAS FRYERS - TROUBLESHOOTING COMPUTER CONTROL The following alarms take precedence over any other controller mode or function (except drain valve open). ALARMS OPEN PROBE SHORTED PROBE HI TEMPERATURE IGNITION STATUS DRAIN VALVE INTERLOCK (DVI) F-25114 Rev.A (07-03) DESCRIPTION If an open probe is detected, the heat demand (heat on) and basket lift outputs are disabled.

  • Page 45: Solid State Or Computer Control Harness Pin-Outs

    GR SERIES GAS FRYERS - TROUBLESHOOTING SOLID STATE OR COMPUTER CONTROL HARNESS PIN-OUTS PIN NO. INPUTS E1-1 24VAC Hot E1-2 24VAC Neutral E1-3 Probe High (red) E1-4 Probe Low (white) E1-5 Drain Valve Interlock (24VAC) N.O. E1-6 Ignition Status (24VAC) E1-7 Relay DC (-) Common NOTES:...

  • Page 46: Kleenscreen Filtering System

    GR SERIES GAS FRYERS - TROUBLESHOOTING KLEENSCREEN FILTERING SYSTEM SYMPTOM Oil not filtering, pump motor is on. Frying oil not discarding, pump motor on. Pump motor is not running. F-25114 Rev.A (07-03) POSSIBLE CAUSES 1. Filter screen plugged. 2. Clog in filter system lines. NOTE: If using solid shortening, when all filtered oil is returned to the fry tank and filter power switch is off, open the filter drawer approximately one inch.

  • Page 47: Condensed Spare Parts List

    GR SERIES GAS FRYERS - CONDENSED SPARE PARTS LIST CONDENSED SPARE PARTS LIST PART NUMBER DESCRIPTION 411496-B4 Lighted Rocker Switch, Filter 417792-1 Pump and Motor Assy, Kleenscreen™ Filter 411497-A3 Relay, Filter Circuit, 24v Coil GR SERIES GAS FRYERS WITH TDI CONTROLS PART NUMBER DESCRIPTION 427758-1...
  • Page 48 GR SERIES GAS FRYERS - NOTES - – 48 – F-25114 Rev.A (07-03)

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