Vulcan Heavy Duty Gas Griddle MSA48

Disconnect the electrical power to the machine and follow lockout / tagout procedures

Shut off the gas before servicing the unit and follow lockout / tagout procedures

Check all gas joints disturbed during servicing for leaks using a soap and water solution

Measure distance between manifold pipe and valve for reassembly later

Ensure ignition wires are routed in front of valves to prevent them from touching hot heat shield

Disconnect all gas lines and thermocouple from valve

Disconnect the electrical power to the machine and follow lockout / tagout procedures

Shut off the gas before servicing the unit and follow lockout / tagout procedures

Check all gas joints disturbed during servicing for leaks using a soap and water solution

Remove screws securing thermostat mounting bracket to frame

Pull capillary tube out from underneath griddle plate

Transfer fittings from old thermostat to new thermostat

Observe temperatures at center points of cooking zones using a Surface Probe

Set thermostats to 350°F and allow to stabilize

Record the temperature tester readouts for each zone for 3 cycles

Calculate total average temperature for that zone

Is the temperature within 350°F ±15°F?

Loosen the knob set screw without turning the knob

Remove the knob from the thermostat shaft to expose the temperature dial

Loosen screws on the temperature dial and adjust it to match the griddle plate temperature reading

Tighten the temperature dial screws and knob set screws once calibration is achieved

Unscrew thermocouple fitting from safety valve

Install thermocouple test adapter finger tight plus a quarter turn

Install thermocouple into test adapter finger tight plus a quarter turn

Set VOM to DC millivolt scale and connect (+) meter lead to pin on thermocouple adapter and (-) meter lead to thermocouple

Verify that thermocouple is sufficiently immersed in flame. Adjust pilot valve to allow more gas flow if necessary

Allow pilot to burn for 3-4 minutes to stabilize voltage output from thermocouple with thermostat off

Verify thermocouple output voltage

Enter the measured thermocouple output voltage

Ensure the burner is turned off and cool before starting the adjustment

Loosen the screw on the venturi

Adjust the air shutter to eliminate yellow tips on the burner flames

Lock the air shutter in place by tightening the screw

Check for yellow streaming flame after adjustment

Repeat the adjustment procedure if yellow tips are still present