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C E N T R I F U G A L H E A T E R - C S A
Chief Industries, Inc. 800-359-7600 MAINTAINENCE - 416274
Page 42
screwdriver and arc to the transformer post where spark plug wire was
connected.
Caution
: Do not touch the screwdriver shaft.
ii.
If no arc is present or is less than 1/8” (.31cm) replace transformer.
b.
Spark plug wire is defective (power on).
i.
Take wire off spark plug and arc to heater.
Caution
: Do not touch the
mounting terminal of the spark plug wire. If no arc is present or is less than
1/8” (.31cm) replace wire.
c.
Spark plug is defective
i.
Check gap of plug. Verify gap is 1/8” (.31cm).
ii.
If transformer and spark plug wire are functional replace the spark plug.
2.
Symptom: No ignition, Lack of gas with spark present.
Note
: The check to verify gas is
present should be made after all the electrical component checks are made, and the electrical
controls are confirmed to be functioning properly.
Note
: that the purge delay develops a 30
second delay for the solenoids to open.
a.
Lack of gas to the heater.
i.
Check tank to see if ample pressure is available to start unit. Unit requires 35
psig (241kPa) of propane pressure and 5 psig (34kPa) of natural gas available at
the unit for startup.
ii.
Check to see if the tank, regulator, or line going to the unit is blocked.
b.
Check to see if the solenoids are functioning.
i.
(Power On) Put your hand on the top of the solenoid and turn the heater toggle
switch on and allow 30 seconds for the purge. If you feel a click at the top of
the solenoid, the coil is functional and the solenoid is working electrically. If
there is no click, the coil is defective and should be replaced.
ii.
(Power Off) Check solenoid to see if screen is plugged or the diaphragm is
defective. Unscrew the top of the brass fixture and locate the screen and
diaphragm inside. Be sure to reassemble properly. Reversing any parts in the
solenoid will cause the solenoid not to function properly. Keep all foreign
material out of the solenoid.
c.
Obstruction in the gas line.
i.
Install pressure gauges at available locations in the plumbing line to determine
where a fuel restriction could exist.
d.
If gas is present at the pressure gage but unit lacks gas for ignition.
i.
Check orifice size, and be sure it is clean. (
ii.
Check burner. See that holes are not plugged. See that the tubing isn't plugged
by debris.
3.
Symptom: Flame sensing relay locks ignition out.
a.
If ignition is not present.