Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Vulcan-Hart 24RRG
Summary of Contents for Vulcan-Hart 24RRG
- Page 1 SERVICE MANUAL Heavy Duty Gas Griddles MODEL 24RRG ML-135339-00024 36RRG ML-135340-00036 48RRG ML-135341-00048 60RRG ML-135342-00060 www.vulcanhart.com ITW Food Equipment Group, LLC 3600 North Point Blvd. Baltimore, MD 21222 48RRG FORM F-36986 (Rev. 11-08)
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Page 2: Table Of Contents
TABLE OF CONTENTS INSTALLATION………………………………………………………….. OPERATION……………………………………………………………... CLEANING……………………………………………………………….. LUBRICATION…………………………………………………………… SPECIFICATIONS………………………………………………………. COMPONENT LOCATION……………………………………………... CONTROL PANEL………………………………………………………. BULLNOSE………………………………………………………………. BACK PANEL……………………………………………………………. IDENTIFICATION PLATE………………………………………………. FLUE………………………………………………………………………. THERMOSTAT…………………………………………………………... THERMOSTAT TROUBLESHOOTING... SYMPTON-BURNER WILL NOT COME ON…………………………. SYMPTON-GRIDDLE SURFACE TEMPERATURE IS MORE THAN 5° F OFF THERMOSTAT SETPOINT…………………………. THERMOSTAT REMOVAL……………………………………………... TEMPERATURE PROBE………………………………………………. TEMPERATURE PROBE REMOVAL…………………………………. - Page 3 BURNER………………………………………………………………….. BURNER TROUBLESHOOTING………………………………………. BURNER REMOVAL……………………………………………………. BURNER ADJUSTMENT……………………………………………….. GAS REGULATOR……………………………………………………… REGULATOR TROUBLESHOOTING…………………………………. SYMPTOM-UNIT WILL NOT MAINTAIN CONSISTENT GAS PRESSURE………………………………………………………………. GAS PRESSURE MEASUREMENT…………………………………... PRESSURE TAP LOCATION………………………………………….. SEQUENCE OF OPERATION…………………………………………. WIRING DIAGRAMS……………………………………………………. 24-INCH GRIDDLE………………………………………………………. 36-INCH GRIDDLE………………………………………………………. 48-INCH GRIDDLE………………………………………………………. 60-INCH GRIDDLE……………………………………………………….
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Page 4: Installation
This manual is prepared for the use of trained service technicians and should only be used by those who are properly qualified. This manual is not intended to be all encompassing. You should read, in it's entirety, the repair procedure you wish to perform to determine if you have the necessary tools, instruments and skills required to perform the procedure. -
Page 5: Component Location
PRESSURE CHECK PLUG TEMPERATURE CONTROLLER 498438 SAFETY IGNITION MODULE 498443 DUAL SOLENOID VALVE 713656 PILOT ADJUSTMENT VALVE 36RRG CONFIGURATION SHOWN COMPONENT LOCATION GAS MANIFOLD 720122 ¼” FLEX TUBE KNOB 498438-1 3/8” FLEX TUBE INDICATOR LIGHT 719194 PILOT SPARK ASSEMBLY 713930 BURNER ORIFICE 720017 POWER SWITCH... -
Page 6: Control Panel
BULLNOSE CONTROL PANEL Disconnect the electrical power and follow lockout / tagout procedures It will be necessary to remove the back panel when changing a burner, temperature probe or to remove excessive grease build up from the flue area. 1. Disconnect gas supply at griddle. 2. -
Page 7: Thermostat
WIRING CONFIGURATION The thermostat is a solid state control. The thermostat supplies power to the burner solenoid valves and indicator lights when turned on or until the temperature setpoint is reached. Disconnect the electrical power and follow lockout / tagout procedures THERMOSTAT TROUBLESHOOTING SYMPTOM –... -
Page 8: Thermostat Removal
Disconnect the electrical power and follow lockout/tagout procedures THERMOSTAT REMOVAL 1. Remove the control panel 2. Remove the knob 3. Label and disconnect the wires 4. Remove the thermostat retaining nut on the knob shaft. 5. Reverse procedure to install while being careful to install the thermostat in the same orientation. 498432-A TEMPERATURE PROBE The temperature probe is an embedded K... -
Page 9: Adjustments
CALIBRATION 1. Each temperature controller controls a 12” zone griddle. Using temperature measurement device, observe the temperatures cooking zones. These points are located by starting 6” from the side splash (left or right) and every 12” across the width of the griddle, with all points located 12”... -
Page 10: Power On/Off Switch
TEMPERATURE CONTROLLER INDICATOR LIGHT The Power Switch controls the power supply to all other electronic components. Disconnect the electrical power and follow lockout / tagout procedures POWER SWITCH TROUBLESHOOTING SYMPTOM – NO POWER BEING SUPPLIED TO THE UNIT Check for loose or excessively greasy/dirty connections at terminals. With power wires disconnected check for continuity/resistance between the 1 and 2 terminals A. -
Page 11: Indicator Light
The indicator light illuminates fully to indicate that the corresponding thermostat and burner have turned on and gas is flowing through the corresponding solenoid valve. The indicator light will illuminate at a lower intensity when the pilot safety circuit is being made (pilot lit) but the corresponding burner solenoid valve and thermostat are not on. -
Page 12: Safety Ignition Module Troubleshooting
Disconnect the electrical power and follow lockout / tagout procedures SAFETY IGNITION MODULE TROUBLESHOOTING SYMPTOM – NO SPARK BETWEEN PILOT HEAD AND ELECTRODE 1. Check for loose or greasy/dirty connections at all terminals (including electrode wire) 2. Check for 120 voltage from pin 4 wire to ground. a. -
Page 13: Solenoid Valve Troubleshooting
RETAINING SCREW Disconnect the electrical power and follow lockout / tagout procedures SOLENOID VALVE TROUBLESHOOTING SYMPTOM – NO GAS FLOW TO BURNER Check terminals for loose or greasy/dirty connections Check gas pressure – check for orifice obstructions. With thermostat, indicator light and power switch on – check for 120 voltage between the two terminals on the solenoid. -
Page 14: Pilot
PILOT TROUBLESHOOTING SYMPTOM – PILOT WILL NOT LIGHT 1. Check pilot adjustment at solenoid valve 2. Check that power switch is on 3. Check that pilot solenoid valve is working 4. Check that safety ignition module and power switch are working 5. -
Page 15: Burner
HELPFUL HINT – If the unit is attached to a flexible gas line, you can extend the bullet feet out to their fullest extension to raise the griddle and allow yourself more clearance while reaching under the unit. Remember to relevel the unit if you chose to do this. The RRG Series Griddle utilizes U-shaped burners with a single center inlet for every 12 inches of griddle width. -
Page 16: Burner Adjustment
Reach through the back of the unit. Squeeze the burner retaining clip and slide off burner retaining pin. Lift the burner up so the retaining pin clears the corresponding hole in the chassis, then pull the burner out through the back of the unit. Replace by inserting the burner through the rear of the unit and engaging the burner venturi onto the burner orifice at the front of the unit. -
Page 17: Gas Regulator
VENT LIMITER REGULATOR INSTALLED UPRIGHT POSITION REGULATOR TROUBLESHOOTING SYMPTOM – UNIT WILL NOT MAINTAIN CONSISTENT PRESSURE Check that vent limiter is not clogged by grease and debris Check store gas pressure before regulator with all equipment on that line turned on and consuming gas A. -
Page 18: Pressure Tap Location
12. Turn power switch and gas supply back on. All gas joints disturbed during servicing must be checked for leaks. Check with a soap and water solution. Do not use an open flame. Operation is the same for all size griddles. The neutral wire from the power source is directly connected to each thermostat and each safety ignition module. -
Page 19: Wiring Diagrams
WIRING DIAGRAMS WIRING DIAGRAM – 24-INCH GRIDDLE... -
Page 20: 36-Inch Griddle
WIRING DIAGRAM – 36-INCH GRIDDLE... -
Page 21: 48-Inch Griddle
WIRING DIAGRAM – 48-INCH GRIDDLE... -
Page 22: 60-Inch Griddle
WIRING DIAGRAM – 60-INCH GRIDDLE...