Belshaw Brothers and 734CG, 724CG, 718LCG manual Appearance Cause

c.Make sure the electrical connections are clean and tight. Replace damaged wire with moisture-resistant #18 wire rated for continuous duty up to 221°F/105°C.

d.Check to see if ceramic insulator is cracked. A cracked insulator can cause a short to ground. Replace the igniter- sensor if necessary.

e.At the gas control, disconnect the main valve wire from the TH or MV terminal.

f.Connect the fryer to the power source and move the on/off switch to the ON position.

g.Turn on the power and set thermostat above 200°F/93°C to call for heat. The pilot should light, but the main burner will remain off because the main valve actuator is disconnected.

h.Check the pilot flame. Make sure it is blue, steady, and envelops 3/8-1/2”/

10-13 mm of the flame rod. See the table below for possible flame problems and their causes.

i.If necessary, adjust the pilot flame by turning the pilot adjustment screw on the gas control clockwise to decrease or counterclockwise to increase the pilot flame. Following adjustment, always replace the pilot adjustment cover screw and tighten it firmly to assure proper gas control operation.

j.Set the thermostat below 200°F/93°C to end the call for heat.

4.Recheck the ignition sequence as follows:

a.Reconnect the main valve wire.

b.Set the thermostat above 200°F/93°C to call for heat.

c.Watch the ignition sequence at the burner.

If the spark still does not stop after the pilot lights, replace the ignition module.

If the main burner does not light, check for 24V AC across MV-MV/PV terminals. If there is no voltage, replace the module. Also, check the electrical connections between the module and the gas control. If they are okay, replace the gas control or the gas control operator.

Appearance	Cause
small blue flame	lack of gas due to
	clogged orifice filter
	lack of gas due to
	clogged pilot filter
	low gas supply
	pressure
	pilot adjustment is at
	minimum
lazy yellow flame	lack of air due to large
	orifice
	pilot adjustment is at
	minimum
waving blue flame	excessive draft at pilot
	location
	products of
	combustion are
	recirculating
noisy lifting blowing	high gas pressure
flame
hard sharp flame	high gas pressure
	orifice too small

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

A-6 MN-1141EN 718LCG, 724CG, and 734CG Gas Fryers