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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Once the pilot flame is confirmed, a 24 volt output
from terminal one will be sent, allowing the main
valve (cycling) coil of the combination valve to
operate at the request of the cycling pressure
switch.
Terminals:
1.
Main Valve - 24VAC will be present on terminal
#1 with the pilot sensing electrode sensing an
adequate pilot fame. This output will remain
present as long as the pilot flame remains
adequate.
2.
Common (MV/PV).
3.
Pilot Valve - 24VAC will be present on terminal
#3 at the instant an input voltage is supplied to
the module. This voltage will remain present on
terminal #3 providing an adequate pilot flame is
established within 90 seconds. In the event that
an adequate pilot flame is not established
within 90 seconds this output voltage will drop
out.
4.
Ground (burner).
5.
24VAC Neutral (ground).
6.
24VAC Input.
7.
High Voltage to spark electrode (The pilot
flame current is sensed by the Ignitor Module
via the spark electrode high voltage wire and
terminal #9).
Spark Ignition Control Test
1.
If the ignition control module does not appear
to be sparking to ignite gas, perform the
following:
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)
2)
3)
2.
Install the pilot ignitor and attach ignition cable.
A.
Turn the main power switch ON and verify
the ignition control modules re-set switch
is ON. Observe spark condition from
ignitor.
1)
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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.
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 re-test.
Check the ignition cable for tightness
or damaged insulation. If the ignition
cable appears to be damaged, then
replace it and re-test.
If a spark from ignitor is present and
ignites the gas from the pilot and
burner then the system is working
properly.
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