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IGNITER and ELECTRODE
Servicing of the igniter and electrode is needed when a spark
is not observed at the electrode when pushing the igniter
button. This may happen with use over a period of time, dust
and dirt accumulation, or improper gap
If you do not see a spark being generated at the electrode
check the following areas:
A. Igniter
1. Remove the wire from the push button igniter.
2. Position a screwdriver tip about 1/8 in.(3 mm) from
igniter. See Fig. 9
3. Holding the screwdriver by its handle, push the
igniter's button several times. If spark is not seen,
replace the piezo igniter. If spark is observed, proceed
to electrode servicing.
FIG. 9
THERMOCOUPLE
The thermocouple may need replacement if the burner
goes out after allowing the thermocouple to warm for an
extended period of time. Normal time for warm-up is
about 30 seconds to 1 minute.
1. See Fig. 11 for thermocouple location and
instructions.
2. To determine if the thermocouple is defective:
-- Connect tip switch leads together with a
jumper.
-- Connect an ohm meter between the
thermocouple tip and its contact button
(previously connected to safety control)
-- A good thermocuple will give some level of
resisitance from end to end.
-- A defective thermocouple will show an
overload or infinite resistance on the ohm
meter.
13
B. Electrode
1. Ensure the electrode's wire, connected to the ignitor, is
securely connected.
2. Check the wire for nicks, cuts, or mars. Nicks or cuts
will prevent a spark from being generated at the
electrode tip. Replace the electrode if necessary.
3. Electrode tip is approximately 3/16 in. (4.7 mm) from
burner screen.
4.
If necessary, remove the electrode and clean its tip
with emery cloth or steel wool. See Fig. 10.
5. Verify that the electrode's insulator body is not cracked
and that the electrode rod does not move within its the
body. See Fig. 9. If it does, replace the electrode.
FIG. 10
THERMOCOUPLE
SCREEN NOT SHOWN TO
ALLOW VIEW OF TIP
FIG. 11
LOOSEN NUT
LOOSEN NUT AT
SAFETY CONTROL
DISCONNECT LEADS
AT TIP SWITCH
REMOVE ELECTRODE
BRACKET SCREW TO
SERVICE
ELECTRODE BODY
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