Trouble Shooting Chart - COZY W255F Installation And Operating Instructions Manual

TROUBLE SHOOTING CHART for qualified service technician- MAIN BURNER
SYMPTOM POSSIBLE CAUSES
Flame too large 1. Defective operator section of gas valve.
2. Burner orifice too large.
3. If installed above 2,000 ft.
Flame pops back 1. Too much primary air.
Noisy Flame 1. Too much primary air.
2. Noisy pilot.
3. Burr in orifice (if it whistles or resonates).
4. Excessibe gas input.
Yellow tip flame 1. Too little primary air.
(some yellow tipping 2. Clogged main burner ports.
on L.P. gas is 3. Clogged draft hood.
permissible) 4. Linted up air shutter.
Floating Flame 1. Blocked venting.
2. Insufficient primary air.
Gas Odor 1. Gas leak.
2. Chimney or flue obstruction.
3. Drafts around appliance.
Delayed Ignition 1. Pilot flame too small.
2. Burner ports clogged near pilot.
3. Low gas pressure.
4. Pilot decreases in size when main burners
5. Air shutter open too far.
6. Drafts around appliance.
7. Bad venting.
Failure to Ignite 1. Main gas off.
2. Defective gas valve.
Condensation of 1. Improper venting.
water vapor
Burner won't 1. Defective or sticking automatic valve.
turn off 2. Excessive gas pressure (The supply gas
Incorrect gas input 1. Gas input not checked.
2. Clogged orifice.
Not enough heat 1. Appliance undersized.
2. Temperature dial set too low. (Bulb
3. Incorrect supply pressure.
Too much heat 1. Temperature dial set too high.
2. Combination control valve sticks open.
come on.
pressure must not exceed 1/2 psi or 14"
water column).
type valves).
CORRECTIVE ACTION
1. Replace complete valve.
2. Check with local gas company for proper
orifice size and replace.
3. Refer to orifice chart, Page 3.
1. Adjust air shutter. (See Page 12).
1. Adjust air shutter. (See Page 12).
2. Reduce pilot gas with adjusting screw on
combination gas control valve.
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. Clean as necessary.
1. Clean flue passageways to remove blockage.
2. Adjust air shutter to increase primary air supply.
(See Page 12).
1. Shut off gas service immediately. Check
piping. Call gas company. (See Page 1).
2. Clean flue.
3. Eliminate drafts.
1. Check pilot orifice, increase pilot gas flow
if necessary by adjusting inlet pressure.
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). (See Page 12).
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. Re-check 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. Raise setting of Temperature Dial. See
"Lighting and Shutting Down Instructions".
3. Check supply pressure as outlined above.
1. Lower setting of temperature dial. See "Lighting
and Shutting Down Instructions".
2. Replace combination control valve.
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