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5.0 Trouble-shooting
CAUTION
PROBLEM
Pilot fails to light.
Main flame fails to light or goes
out as burner cycles to high fire.
Low fire flame is weak or
unstable.
Burner behaves erratically, does
not respond to adjustment.
Main flame too long & yellow at
high fire.
Main flame too short at high fire.
Low fire (pilot) flame is long,
soft or yellow.
Trouble-shooting of panels and electrical circuits should be done by quali-
fied plant electricians, technicians, or engineers experienced in all facets
of this type of combustion equipment.
1. On initial start-up, gas line may be filled with air. Repeat ignition
trial several times to purge.
2. No power to ignition transformer or pilot solenoid.
3. Open circuit between ignition transformer and spark plug.
4. Spark plug needs cleaning.
5. Spark plug center electrode grounded against burner.
6. Spark plug improperly grounded. Do not use pipe dope on ignition plug
threads.
7. Pilot gas cock screw closed.
8. Insufficient gas pressure into or out of pilot regulator.
1. Pilot set too lean, becoming unstable as air increases.
2. Insufficient pressure into or out of main gas regulator.
3. Main gas adjusting valve not open enough.
4. Marginal air pressure switch setting.
5. Suction or backpressure in chamber fluctuates, upsetting pilot stability.
Cross-connect pilot regulator vent to the combustion chamber, but not via
the burner air pressure tap.
1. Gas flow is insufficient. Open pilot gas cock adjusting screw or increase
pressure out of pilot gas regulator.
1. Burner internals loose, dirty or burned out. If any of these problems exist, con-
tact your Eclipse representative or the Eclipse factory for service.
1. Gas flow is too high. Gas butterfly valve is open too far, or main gas regu-
lator spring is screwed in too far.
1. Gas flow is too low. Gas butterfly valve is closed too far, or main gas regu-
lator spring is screwed out too far.
1. Too much gas flow. Main gas proportionator spring is set for too much
flow, or pilot gas cock adjustment is open too far.
2. Insufficient air flow due to dirty blower filter or impeller.
13
CAUSE(S)
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