COZY BBT54 Installation And Operation Instructions Manual page 21

SYMPTOM
Flame too large
Yellow burner flame
Gas odor
Delayed Ignition
Failure to ignite
Burner won't turn off
Incorrect gas input
Not enough heat
Too much heat
Main burner goes out
during normal operation
TROUBLE SHOOTING CHART
POSSIBLE CAUSES CORRECTIVE ACTION
1. Defective operator section ofvatve. 1. Replace valve.
2. Burner orifice too large. 2. Check with local gas company for proper
3. If installed above 2,000 ft.
1. Clogged burner ports.
2.
1.
1.
2.
Obstruction around vent cap.
Gas leak.
Low gas pressure.
Igniter not properly located.
Main gas oft'. 1.
Thermostat not set high enough to call 2.
1.
2.
orifice size and replace.
3. See burne orifice section, Page 12.
1. Remove burners and check for
obstructions in throats, ports, and
orifices. Clean - but do not enlarge ports
or orifices.
2. Make sure area around vent cap is clear,
be sure vent system is sealed.
1. See Page 1.
1. Check gas supply pressure.
2. Check ignitor location and correct if
necessary.
Open all manual gas valves.
Set thermostat to higher temperature.
for heat.
3. Clogged burner orifice.
4. Incorrect wiring.
5. Detective valve.
6. No power to unit.
3. Clean burner orifice (do not enlarge).
4. Check wiring diamam.
5. Replace valve.
6. Check power supply.
7. Defective _ressure switch. 7. Rer_lace _ressure switch.
1. Defective or damaged thermostat wire, 1. Cean be checked by removing wire from
or thermostat, control board terminal. If burner goes oft:
2. Thermostat location.
3. Detective or sticking valve.
4. Excessive gas pressure.
5. Defective or damaged thermostat.
1. Gas input not checked.
2. Clogged orifice.
1. Furnace undersized.
2. Temperature dial set too low. 2.
3. Incorrect SuDDlvoressure. 3.
1.
2.
1.
2.
3.
Telnperamre dial set too high. 1.
Combination control valve stuck open. 2.
Defective flmne sensor. 1.
Input too high. 2.
Cover around pilot lighter hole not air 3.
tight.
Vent tubes not properly installed or 4.
sealed.
4.
5. Limit switch opens.
6. Exhaust or air intake robes blocked.
replace thermostat.
2. Re-locate thermostat out of drafts, hot, or
cold spots.
3. Replace valve.
4. Contact utility supplying gas.
5. Replace thermostat.
1. Re-check gas input.
2. Clean orifices with a smooth wood
toothpick, do not enlarge.
1. This is especially true when a dwelling
or room is enlarged. Have the heat loss
calculated and colnpare to furnace
output. Your gas company can supply
you with this int\_rlnation. If furnace is
undersized, replace with correct size unit,
or add up to two more heaters.
Raise telnperature setting.
Check SuDDlvDressure.
Lower temperature setting.
Replace combination control valve.
Check voltage and replace if low.
Check input rate.
Tighten screws securing sight glass.
Check and replace gasket if needed.
Follow instructions. Check both
exhaust and air intake tubes, and vent
cap. Be sure all gaskets are in place and
properly sealed. Use only tubes and
vent cap supplied. Do not alter vent
tubes or cap. Check wall thickness and
tube lengths.
5. Check rate - remove any obstructions to
circulating air.
6. Remove obstruction. Check for snow.
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