Instruction/ maintenance manual of the product ML-136221-00G24 Vulcan-Hart
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SERVICE MANUAL Heavy Duty Gas Griddles MODEL MLS 924RE ML-135221-00G24 936RE ML-135222-00G36 948RE ML-135223-00G48 960RE ML-135224-00G60 972RE ML-135225-00G72 www.vulcanhart.com 924RE AGE24 MODELS MLS AGE24 ML-135226-00G24 AGE36 ML-135227-00G36 AGE48 ML-135228-00G48 AGE60 ML-135229-00G60 AGE72 ML-135230-00G72 www.
- 2 - TABLE OF CONENTS INSTALLATION ........................................................................................................................... 4 COMPONENT LOCATION ......................................................................
- 3 - SYMPTOM – ONE BURNER HAS A DELAYED I GNITION; A SEVERAL SECOND LAPSE BETWEEN THE INDICATOR LIGH T TURING ON AND W HEN THE BURNER ACTUALLY LIGHTS. .................................................................................................
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.
COMPONENT LOCATION 948RE AND AGE48 CONTROL PANEL - 5 -.
CONTROL PANEL Disconnect the electrical power and follow lockout / tagout procedures The Control Panel holds the thermostats, indicator lights and power switch, and is connected to the Control Plate with a Panel Connector 1. Remove the four screws securing the control panel.
HEAT SHIELD Disconnect the electrical powe r and f ollow lockout / tagout procedures The heat shield protects the electrical components and should only be temporarily removed for easier replacement of some the control components. 1. Remove the control panel.
Disconnect the electrical power and follow lockout / tagout procedures THERMOSTAT TROUBLESHOOTING SYMPTOM – NO POWER TO THE BURNER S OLENOID 1. Check for loose or excessively greasy/dirty connections at terminals 2. Check for continuity/resistance between the tw o thermostat terminals with wires disconnected A.
THERMOSTAT CALIBRATION 1. Each thermostat cont rols a 12” zone of the griddle. Usin g a Surface Pr obe temper ature measurement de vice, observe the temperatures at the center points of the cooking zon es.
TEMPERATURE DIAL INDICATOR LIGHT KNOB POWER SWITCH KNOB GUARD ( OPTIONAL ) 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.
A. If no voltage – check wiring for short or break and check thermostat B. If you have 120V – replace indicator light. Disconnect the electrical power and follow lockout / tagout procedures INDICATOR LIGHT REMOVAL 1. Remove the control panel 2. Label and disconnect wires to the light 3.
Disconnect the electrical power and follow lockout / tagout procedures FLAME SWITCH TROUBLESHOOTING SYMPTOM – INDICATOR LIGHTS, THERMOST ATS AND BURNER V ALVES NOT WORKING 1. Check for loose or excessively greasy/dirty terminal connections 2. Check that flame switch probe is fully engulf ed in the pilot flame and glowing cherry red.
Disconnect the electrical power and follow lockout / tagout procedures SPARK IGNITOR TROUBLESHOOTING 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 L1 terminal to ground a.
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 orif ice obstructions.
PILOT ASSEMBLY REMOVAL Disconnect the electrical power and follow lockout / tagout procedures Shut off gas supply - 15 - 1. Remove control panel and heat shield 2. Reaching underneath the front of the unit, remove the pilot tube fitting and disengage the pilot tube from the pilot.
Disconnect the electrical power and follow lockout / tagout procedures BURNER TROUBLESHOOTING SYMPTOM – ALL BURNERS HAVE A LOWE R OR HIGHER FLAME THAN NORMAL. 1. Check gas pressure SYMPTOM – ONE OR MORE BURNERS HAVE LOWER FLAME LEVE L THAN THE OTHERS.
BURNER CLIP (U NDERNEATH ) FLASH TUBE PILOT ASSY IGN ITION PORTS AIR SHUTTER ORIFICE MAIN BURNERS These photos are for reference – it should not be necessary to remove the griddle top to perform the procedures listed in this manual.
REGULATOR TROUBLESH OOTING SYMPTOM – UNIT WILL NOT MAINTAIN CONSISTENT PRESSURE 1. Check that vent limiter is not clogged by grease and debris 2. Check store gas pressure before regulator with all equipment on that line turned on and consuming gas A.
SEQUENCE OF OPERATION Operation is the same for all size griddles. The neutral wire from the power source is directly connected to a terminal on each thermostat, the N terminal on each ignition module and one terminal on the pilot solenoid. 1. The power on/off switch is set to the ON position.
WIRING DIAGRAMS WIRING DIAGRAM – 24-INCH GRIDDLE - 20 -.
WIRING DIAGRAM – 36-INCH GRIDDLE - 21 -.
WIRING DIAGRAM – 48-INCH GRIDDLE - 22 -.
WIRING DIAGRAM – 60-INCH GRIDDLE - 23 -.
WIRING DIAGRAM – 72-INCH GRIDDLE - 24 -.
An important point after buying a device Vulcan-Hart ML-136221-00G24 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Vulcan-Hart ML-136221-00G24 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Vulcan-Hart ML-136221-00G24 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Vulcan-Hart ML-136221-00G24 you will learn all the available features of the product, as well as information on its operation. The information that you get Vulcan-Hart ML-136221-00G24 will certainly help you make a decision on the purchase.
If you already are a holder of Vulcan-Hart ML-136221-00G24, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Vulcan-Hart ML-136221-00G24.
However, one of the most important roles played by the user manual is to help in solving problems with Vulcan-Hart ML-136221-00G24. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Vulcan-Hart ML-136221-00G24 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
