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Vulcan-Hart 60RRG - page 1
ITW Food Equipment Group, LLC 3600 North Point Blvd. Baltimore, MD 21222 FORM F-36986 (Rev . 11-0 8) SERVICE MANUAL Heavy Duty Gas Griddles MODEL MLS 24RRG ML-135339-00024 36RRG ML-135340-00036 48RRG ML-135341-00048 60RRG ML-135342-00060 www.vulcanhart.com 48RRG ...
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Vulcan-Hart 60RRG - page 2
- 2 - TABLE OF CONTENTS INSTALLATION………………… …………………………… ………….. OPERATION……………………… ………………………… …………... CLEANING……………………… …………………………… ………….. LUBRICATION…………………… ………………………… ……? ...
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Vulcan-Hart 60RRG - page 3
- 3 - BURNER…………………………… …………………………………….. BURNER TROUBLESHOOTING …………… …………………………. BURNER REMOVAL ………………………… …………………………. BURNER ADJUSTMENT …………………………………… ………….. GAS REGULATOR………………… ...
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Vulcan-Hart 60RRG - page 4
- 4 - GENERAL INTRODUCTION 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 ...
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Vulcan-Hart 60RRG - page 5
- 5 - COMPONENT LOCATION TEMPERATURE CONTROLLER 498438 SAFETY IGNITION MODULE 498443 DUAL SOLENOID VA LVE 713656 GAS MANIFOLD 720122 PILOT SPARK ASSEMBLY 713930 INDICATOR LIGHT 720017 POWER SWITCH 810280-1 PILOT ADJUSTMENT V A LVE 71 9 1 9 4 PRESSURE CHECK PLUG BURNER ORIFICE 3/8” FLEX TUBE ¼” FLEX TUBE 36RRG CONFIGURATION SHOWN KNOB 498438-1 ...
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Vulcan-Hart 60RRG - page 6
- 6 - EXTERIOR PANELS CONTROL PANEL Disconnect the electrical power and follow lockout / tagout procedures The Control Panel holds the thermostats, indicator lights and power switch. REMOVAL 1. Remove the four screws securing the front of the control panel. There are two screws at each end of the panel. 2. Remove the screws that secure the bottom o ...
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Vulcan-Hart 60RRG - page 7
- 7 - THERMOSTAT 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 r eached. Disconnect the electrical power and follow lockout / tagout procedures THERMOSTAT TROUBLESHOOTING SYMPTOM – BURNER WILL NOT COME ON 1. Check for lo ...
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Vulcan-Hart 60RRG - page 8
- 8 - 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. TEMPERATURE PR ...
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Vulcan-Hart 60RRG - page 9
- 9 - ADJUSTMENTS CALIBRATION 1. Each temperature controller c ontrols a 12” zone of the gri ddle. Using a Surface Probe temperature measurement device, observe the temperatur es at the cente r points of t he cooking zone s. These points are located b y starting 6” from the side splash (lef t or right) and every 12” across th e width of the g ...
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Vulcan-Hart 60RRG - page 10
- 10 - POWER ON/OFF SWITCH The Power Switch controls the power supply to all other electronic com ponents. Disconnect the electrical power and follow lockout / tagout procedures POWER SWITCH TROUBL ESHOOTING SYMPTOM – NO POWER BEING SUPPLIE D TO THE UNIT 1. Check for loose or exce ssively greasy/dirty connections at terminals. 2 With power wires ...
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Vulcan-Hart 60RRG - page 11
- 11 - INDICATOR LIGHT The indicator light illuminates fully to indicate that the corresponding ther mostat 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 valv ...
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Vulcan-Hart 60RRG - page 12
- 12 - Disconnect the electrical power and follow lockout / tagout procedures SAFETY IGNITION MODULE TROUBLES HOOTING SYMPTOM – NO SPARK BETWEEN PILOT HEAD AND EL ECTRODE 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. If no voltage check on/off swit ...
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Vulcan-Hart 60RRG - page 13
- 13 - Disconnect the electrical power and follow lockout / tagout procedures SOLENOID VALVE TROUBLESHOOTI NG SYMPTOM – NO GAS FLOW TO BURNER 1. Check terminals for loose or greasy/dirty connections 2. Check gas pressure – check for orifice obstructio ns. 3. With thermostat, indicator light and power switch on – check for 120 voltage between ...
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Vulcan-Hart 60RRG - page 14
- 14 - PILOT The RRG Series Griddles utilize a solenoid valve with a brass pilot valve to control gas flow to pilot burners. One to three pilot flames can be fed by one valve – one leg of which may be branched. PILOT TROUBLESHOOTING SYMPTOM – PILOT WILL NOT LIGHT 1. Check pilot adjustment at solenoid valve 2. Check that power switch is on 3. Ch ...
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Vulcan-Hart 60RRG - page 15
- 15 - HELPFUL HINT – If the unit is attached to a flexible gas line, you can extend the bullet feet out t o 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. BURNER The RRG Series Griddle utilizes U-shaped burners with a single cente ...
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Vulcan-Hart 60RRG - page 16
- 16 - 2. Reach through the back of the unit. Squeeze the burner retaining clip and slide off burner retaining pin. 3. Lift the burner up so the retaining pin clears the corresponding hole in th e chassis, then pull the burner out through the back of the unit. 4. Replace by inserting the burner through the rear of the unit and engaging the burner v ...
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Vulcan-Hart 60RRG - page 17
- 17 - GAS REGULATOR REGULATOR INSTALLED IN A HORI ZONTAL, UPRIGHT POSITION The RRG series units must have an exterior machine gas regulator installed. The units are shipped with a regulator that has a vent limiter. These regulators must be installed as close as possible to the unit in a horizontal, upright position for optimal performance. They ar ...
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Vulcan-Hart 60RRG - page 18
- 18 - 12. Turn power switch and gas supply back on. All gas joints disturbed during ser vicing must be checked for leaks. Check with a soap and w ater soluti on. Do not use an open flame. PRESSURE TAP AT #1 BURNER SEQUENCE OF OPERATION Operation is the same for all size griddles. The neutral wire from the power source is directly connected to each ...
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Vulcan-Hart 60RRG - page 19
- 19 - WIRING DIAGRAMS WIRING DIAGRAM – 24-INCH GRIDDLE ...
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Vulcan-Hart 60RRG - page 20
- 20 - WIRING DIAGRAM – 36-INCH GRIDDLE ...
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Vulcan-Hart 60RRG - page 21
- 21 - WIRING DIAGRAM – 48-INCH GRIDDLE ...
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Vulcan-Hart 60RRG - page 22
- 22 - WIRING DIAGRAM – 60-INCH GRIDDLE ...
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