System Condition Quick Check Procedures; Schematic; Component Function - Vulcan-Hart EF3 ML-52099 Service Manual

SYSTEM CONDITION QUICK
CHECK PROCEDURES
1. Use the Pilot Lighting procedure and
check millivolts (mV) at wires 3 and 4.
A. lf the pilot lights, then pilot combination
valve and high limit are good.
B. If the pilot will not stay lit, check high
limit and open the thermopile circuit. It
should read 300 mV; if there are Ø
volts, check high limit. If the high limit
is good, replace combination valve.
C. Check for voltage at disconnected
thermopile. It should read 300 mV; if
there are Ø volts, replace thermopile.
Check high limit. If the high limit is
good, replace combination valve.
2. Turn on thermostat; burners should light.
A. lf the burner does not light, check the
following:
1) Voltage at combination valve at
wires 2 and 4.
2) If correct voltage is present, then
check combination valve.
3) If there are Ø volts, check voltage
between wire 3 of combination valve
and wire 1 of thermostat. If correct
voltage is present, then check
resistance of
contacts and continuity of wires
3 & 2.
the thermostat
— 17 —

SCHEMATIC

Figure 26

COMPONENT FUNCTION

• Thermostat - Millivolt type with capillary
bulb, single-throw break on temperature
rise. Temperature range of 200°F to
400° F.
• Thermopile - Millivolt control with 24"
capillary. Rated to generate 500 millivolts.
• Combination Valve - Regulates gas flow
to burner and pilot. Provides pilot safety.
• High Limit - Prevents overheating of fryer
in the event of thermostat failure. Opens
at 465°F and automatically resets at
415°F.
EF SERIES GAS FRYERS
F35641 (02-05)