Sterling RT - Manual (Page 23)

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Chart 6 - Troubleshooting continued
SYMPTOMS
D. Main burners will not light.
continued
E. Flame lifting from burner ports.
F. Flame pops back.
G. Noisy fl ame.
H. Yellow tip fl ame (some yellow
tipping on propane gas is
permissible.
POSSIBLE CAUSES
8. Defective transformer.
9. Loose wiring.
10. Defective ignition control.
1. Pressure regulator set too
high.
2. Defective regulator.
3. Burner orifi ce too large.
1. Excessive primary air.
1. Too much primary air.
2. Noisy pilot.
3. Irregular orifi ce causing whistle
or resonance.
4. Excessive gas input.
a. Pressure regulator set too
high.
b. Defective regulator.
c. Burner orifi ce too large.
1. Insuffi cient primary air.
2. Clogged main burner ports.
3. Misaligned orifi ces.
4. Air shutter linted.
5. Insuffi cient combustion air.
6. Clogged draft hood/fl ue
collector.
CORRECTIVE ACTION
8. Be sure 115 volts is supplied
to the transformer primary then
check for 24 volts at secondary
terminal before replacing.
9. Check and tighten all wiring
connections.
10. Replace.
1. Reset manifold pressure.
Refer to operation.
2. Replace regulator section of
combination gas valve or
complete valve.
3. Check with local gas supplier
for proper orifi ce size and
replace. Refer to operation.
1. Close air shutter. Refer to
Operation.
2. Check with local gas supplier
for proper orifi ce size and
replace.
1. Close air shutter. Open all
manual gas valves.
2. Reduce pilot gas. Refer to
operation.
3. Replace orifi ce.
4.
a. Reset manifold pressure
Refer to operation.
b. Replace regulator section of
combination gas valve or
complete valve.
c. Check with local gas
supplier for proper orifi ce
size and replace. Refer to
operation.
1. Open air shutters. Refer to
operation.
2. Clean main burner ports.
3. Replace manifold assembly.
4. Check for dust or lint at air
mixer opening and around the
air shutter.
5. Clean combustion air inlet
openings in bottom panel.
Refer to installation.
6. Clean draft hood/fl ue collecter.