Vulcan Materials ITW 24RRG user manual

User manual for the device Vulcan Materials ITW 24RRG

Device: Vulcan Materials ITW 24RRG
Category: Griddle
Manufacturer: Vulcan Materials
Size: 2.61 MB
Added : 12/27/2013
Number of pages: 22
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Abstracts of contents
Summary of the content on the page No. 1

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


ITW Food Equipment Group, LLC
3600 North Point Blvd.
Baltimore, MD 21222 FORM F-36986 (Rev. 11-08)

Summary of the content on the page No. 2

TABLE OF CONTENTS INSTALLATION………………………………………………………….. 4 OPERATION……………………………………………………………... 4 CLEANING……………………………………………………………….. 4 LUBRICATION…………………………………………………………… 4 SPECIFICATIONS………………………………………………………. 4 COMPONENT LOCATION……………………………………………... 5 CONTROL PANEL………………………………………………………. 6 BULLNOSE………………………………………………………………. 6 BACK PANEL……………………………………………………………. 6 IDENTIFICATION PLATE………………………………………………. 6 FLUE………………………………………………………………………. 6 THERMOSTAT…………………………………………………………... 7 THERMOSTAT

Summary of the content on the page No. 3

BURNER………………………………………………………………….. 15 BURNER TROUBLESHOOTING………………………………………. 15 BURNER REMOVAL……………………………………………………. 15 BURNER ADJUSTMENT……………………………………………….. 16 GAS REGULATOR……………………………………………………… 17 REGULATOR TROUBLESHOOTING…………………………………. 17 SYMPTOM-UNIT WILL NOT MAINTAIN CONSISTENT GAS PRESSURE………………………………………………………………. 17 GAS PRESSURE MEASUREMENT…………………………………... 17 PRESSURE TAP LOCATION………………………………………….. 18 SEQUENCE OF OPERATION…………………………………………. 18 WIRING DIAGRAM

Summary of the content on the page No. 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 skills required to perform the procedure. Procedures for which you do not have the necessary tools, instruments and skills should not be attempted.

Summary of the content on the page No. 5

COMPONENT LOCATION GAS MANIFOLD 720122 PRESSURE CHECK PLUG PILOT SPARK ASSEMBLY 713930 ¼” FLEX TUBE BURNER ORIFICE TEMPERATURE CONTROLLER 498438 SAFETY IGNITION MODULE 498443 DUAL SOLENOID VALVE 713656 KNOB 498438-1 3/8” FLEX TUBE PILOT ADJUSTMENT VALVE INDICATOR LIGHT 719194 720017 POWER SWITCH

Summary of the content on the page No. 6

EXTERIOR PANELS CONTROL PANEL FLUE Disconnect the electrical power and follow lockout BACK PANEL / tagout procedures BULLNOSE 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 of the control panel to the underside of the chassis. 3. Pull the control panel forward and lay face

Summary of the content on the page No. 7

THERMOSTAT WIRING CONFIGURATION FRONT VIEW 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 – BURNER WILL NOT COME ON 1. Check for loose or excessively greasy/dirty connections at thermostat terminals

Summary of the content on the page No. 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 PROBE The temperature probe is an embedded K type thermocouple assembly. 498432-A Disconnect the electrical power and follow lo

Summary of the content on the page No. 9

ADJUSTMENTS CALIBRATION 1. Each temperature controller controls a 12” zone of the griddle. Using a Surface Probe temperature measurement device, observe the temperatures at the center points of the 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” back from the front edge of the griddle plate. NOTE: Use of infrared thermometers is not recommended. These devices ar

Summary of the content on the page No. 10

# 3 TERMINAL TEMPERATURE # 1 TERMINAL CONTROLLER # 2 TERMINAL POWER SWITCH INDICATOR LIGHT POWER ON/OFF SWITCH 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 1. Check for loose or excessively greasy/dirty connections at terminals.

Summary of the content on the page No. 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. The indicator light will exhibit no illumination if the pilot safety circuit is not made (pilot not lit). INDICATOR LIGH

Summary of the content on the page No. 12

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. If no voltage check on/off switch and wiring for shorts or breaks 3. Check electrode wire for damage and continuity – if damaged or no continuity change spark/pilot assembly a.

Summary of the content on the page No. 13

INPUT GAS LINE IN BACK CENTER RETAINING SCREW Retaining screw OUTPUT GAS LINES DOUBLE SOLENOID VALVE Disconnect the electrical power and follow lockout / tagout procedures SOLENOID VALVE TROUBLESHOOTING SYMPTOM – NO GAS FLOW TO BURNER 1. Check terminals for loose or greasy/dirty connections 2. Check gas pressure – check for orifice obstructions. 3. With thermostat, indicator light and power switch on – check for 120 voltage between the two

Summary of the content on the page No. 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 – BRASS PILOT one leg of which may be branched. VALVE 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. Check gas

Summary of the content on the page No. 15

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. BURNER The RRG Series Griddle utilizes U-shaped burners with a single center inlet for every 12 inches of griddle width. Each burner is rated for 27,500 BTU/hr. Disconnect the electrical power and follow lock

Summary of the content on the page No. 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 the 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 venturi onto the burner orifice at the front of the unit. 5. Seat the retaining pin in the hole in the chassis and attach the retaining clip. 6. Remov

Summary of the content on the page No. 17

GAS REGULATOR 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 VENT LIMITER installed as close as possible to the unit in a ADJUSTMENT horizontal, upright position for optimal COVER performance. They are adjusted by removing the adjustment cover – then by turning the adjustment screw clockwise to increase and counter clockwise to decrease. The regul

Summary of the content on the page No. 18

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. 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 thermostat and each safety ignition module. 1. The power on/off switch is set to

Summary of the content on the page No. 19

WIRING DIAGRAMS WIRING DIAGRAM – 24-INCH GRIDDLE - 19 -

Summary of the content on the page No. 20

WIRING DIAGRAM – 36-INCH GRIDDLE - 20 -


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