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VL BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS
A.
Check to ensure that all electrical terminal
connections on the ignition control module
and the ignitor are clean and tight. If loose
connections are found, make the necessary
adjustments.
B.
Verify that the ignition control module and
the ignitor have good ground wire
connections. The ignitor mounting bracket
should have good metal to metal contact to
its mounting surface.
C.
Remove the pilot ignitor and check the
following:
1)
The gap between the spark probe and
the ground clip should be
approximately 1/8 inch. If the gap
appears to be excessive or poor
sparking is occurring then adjust.
Fig. 15
2)
Inspect the ceramic flame rod insulator
for cracks or evidence of exposure to
extreme heat, which can permit
leakage to ground. If either of these
conditions exist, then replace the pilot
ignitor and retest.
3)
Check the ignition cable for tightness
or damaged insulation. If the ignition
cable appears to be damaged, then
replace it and retest.
2.
Install the pilot ignitor and attach ignition cable.
A.
Turn the main power switch ON and verify
the ignition control module's reset switch is
ON. Observe spark condition from ignitor.
1)
If a spark from ignitor is present and
ignites the gas from the pilot and
burner then the system is working
properly.
F24650 Rev. A (1017)
2)
3)
3.
Check the ignition control module and
transformer.
A.
Turn the ignition control module's reset
switch OFF then ON to eliminate a lockout
condition.
B.
Check for 24VAC output on the ignition
control module transformer.
1)
2)
4.
After making the necessary component
adjustments or replacements, check for proper
operation.
Page 36 of 93
If a spark from ignitor is present but
does not ignite gas before the ignition
control module locks out, (90 sec.)
there may not be enough gas in the line
for ignition. Verify the gas supply and
gas combination control valve are both
on. Turn the ignition control module's
reset switch OFF then ON to reset the
module. Sparking should then resume
to ignite gas. The module may need
reset several times before ignition
takes place.
If ignitor is still not sparking proceed to
step 3.
If 24VAC is present between terminals
5 and 6 on the ignition control module
but ignitor is not sparking, then replace
ignition control module and retest.
If 24VAC is not present then ensure
that transformer is receiving 120VAC
input. If ignition control module
transformer is receiving proper
voltage, then replace ignition control
module transformer and re-test.
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