Trouble Shooting - COZY 90N30A Installation And Operating Instructions Manual

TROUBLE SHOOTING CHART - MAIN BURNER
SYMPTOM
Flame too large
Flame pops back
Noisy Flame
Yellow tip flame (some
yellow tipping on L.P.
gas is permissible)
Floating flame
Gas odor
Delayed ignition
Failure to ignite
Condensation of water vapor 1. Improper venting.
Burner won't turn off
Incorrect gas input
Not enough heat
Too much heat
TROUBLE SHOOTING CHART - AUTOMATIC PILOT & VALVE
Burner won't turn on
POSSIBLE CAUSES
1. Defective operator section of gas valve.
2. Burner orifice too large.
3. If installed above 2,000 ft.
Too much primary air.
1. Too much primary air.
2. Noisy pilot.
3. Burr in orifice (if it whistles or
resonates).
4. Excessive gas input.
1. Too little primary air.
2. Clogged main burner ports.
3. Clogged draft hood.
4. Linted up air shutter.
1. Blocked venting.
2. Insufficient primary air.
1. Chimney or vent obstruction.
2. Drafts around appliance.
3. Gas leak.
1. Pilot flame too small.
2. Burner ports clogged near pilot.
3. Low gas pressure.
4. Pilot decreases in size when main burners
come on.
5. Air shutter open too far.
6. Drafts around appliance.
7. Bad venting.
1. Main gas off.
2. Defective gas valve.
1. Defective or sticking automatic valve.
2. Excessive gas pressure (The supply gas
pressure must not exceed 1/2 psi or 14"
water column).
1. Gas input not checked.
2. Clogged orifice.
1. Appliance undersized
2. Thermostat set too low.
3. Incorrect supply pressure.
1. Thermostat set too high.
2. Combination control valve sticks open.
1. Pilot flame too large or too small.
2. Dirt in pilot orifice.
3. Defective automatic pilot section in
combination control valve.
4. Defective Thermocouple.
5. Defective combination control valve.
1. Replace complete valve.
2. Check with local gas company for
proper orifice size and replace.
3. Refer to Burner Orifice Section, Pg. 12.
Adjust air shutter. See Page 12.
1. Adjust air shutter. See Page 12.
2. Reduce pilot gas with adjusting screw marked
pilot on combination gas control valve. See
Page 12.
3. Remove burr or replace orifice. (Do not
enlarge orifices).
4. See "Flame Too Large" above.
1. Adjust air shutter. See page 12.
2. Clean main burner ports. (Do not enlarge ports).
3. Clean draft hood.
4. Check for dust or lint at air mixer opening and
around the shutter.
1. Clean flue passage ways to remove blockage.
2. Adjust air shutter to increase primary air supply.
1. Clean chimney or vent - replace if necessary.
2. Eliminate drafts.
3. See Page 1.
1. Check pilot orifice, close, increase pilot gas flow if
necessary by adjusting at combination control valve.
See Page 12.
2. Clean burner ports (Do not enlarge ports).
3. Check gas supply pressure.
4. Supply piping is inadequately sized. Consult local
gas utility or competent installer.
5. Close air shutter to proper setting as outlined in
these instructions (slight yellow tipping is
allowable on L.P. gas).
6. Eliminate drafts.
7. See "Venting".
1. Open all manual gas valves.
2. Replace gas valve.
1. See "Venting.
1. Clean or replace valve.
2. To correct this situation contact the utility
supplying the gas.
1. Recheck gas input.
2. Check orifice for clogging. If clogged, clean out the
hole carefully with a smooth wood toothpick. (Do
not in any way enlarge or distort it.
1. This is especially true when a dwelling or room is
enlarged. Have the heat loss calculated and compare to
the appliance output (70% of input). Your gas company
or installer can supply you with this information. If
appliance is undersized, replace with correct size unit.
2. Setting of thermostat. See "Lighting and Shutting Down
Instructions".
3. Check supply pressure as outlined above.
1. Lower setting of temp. dial. See "Lighting and Shutting
Down Instructions".
2. Replace combination control valve.
1. Readjust pilot flame using adjustment screw marked
"Pilot" on combination control valve. See Page 10.
2. Clean pilot orifice with air or solvent, do not ream.
3. Replace entire combination control valve.
4. Replace thermocouple.
5. Replace valve.
Page 15
CORRECTIVE ACTION