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Belshaw Bros., Inc. • 1750 22
nd
Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425
A-6 MN-1141EN 718LCG, 724CG, and 734CG Gas Fryers
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
flame
high gas pressure
hard sharp flame high gas pressure
orifice too small