Troubleshooting Charts - COZY CF553D-H Installation And Operating Instructions Manual

TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN ) - MAIN BURNER
SYMPTOM POSSIBLE CAUSES
Flame Too 1. Defective operator section of gas
Large valve.
2. Burner orifice too large.
3. If installed above 2,000 ft.
Noisy Flame
1. Noisy pilot.
2. Burr in orifice
(If it whistles or resonates).
3. Excessive gas input.
1. Clogged main burner ports.
Yellow Tip Flame
(Some yellow
2. Clogged draft hood.
tipping on Propane
3. Linted up mixer opening.
gas is permissible).
Floating 1. Blocked venting.
Flame
1. Gas leak.
Gas
Odor
2. Chimney or flue obstruction.
3. Drafts around appliance.
Delayed 1. Pilot flame too small.
Ignition
2. Burner ports clogged near pilot.
3. Low gas pressure.
4. Pilot decreases in size when main
burners come on.
5. Drafts around appliance.
6. Bad venting.
Failure to
1. Main gas off.
Ignite
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 pressure must not
exceed 1/2 PSI or 14" W.C.)
1. Gas input not checked.
Incorrect
Gas Input
2. Clogged orifice.
Not Enough
1. Appliance undersized.
Heat
2. Incorrect supply pressure.
1. Combination control valve
Too Much
Heat sticks open.
1018029-E
Please follow the following corrective actions in order.
1. Replace complete valve.
2. Check with local gas company for proper orifice size and replace.
3. Refer to orifice chart on Page 11.
1. Reduce pilot gas with adjusting screw on combination gas control valve.
2. Remove burr or replace orifice (do not enlarge orifices).
3. See "Flame Too Large" above.
1. Clean main burner ports. (Do not enlarge ports).
2. Clean draft hood.
3. Check for dust or lint at air mixer opening.
1. Clean flue passageways to remove blockage.
1. Shut off gas service immediately. Check piping. Call gas company. See "For Your
Safety", Page 1.
2. Clean flue.
3. Eliminate drafts.
1. Check pilot orifice. Increase pilot gas flow if necessary by adjusting inlet pressure from
gas source (meter if natural gas or second stage regulator if propane - maximum 7" w.c.
for Natural and 11" w.c. for propane).
2. Clean burner ports (do not enlarge ports).
3. Check gas supply inlet pressure. Check gas outlet (manifold) pressure for "minimum
step" pressure (for "step" pressure chart see "Operation").
4. Supply piping inadequately sized or incorrect inlet pressure.
5. Eliminate drafts.
6. See "Venting".
1. Open all manual gas valves.
2. Replace gas valve.
1. See "Venting".
1. 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 (approx. 70% of input). Your gas company or
installer can supply you with this information. If appliance is undersized, replace with
correct size unit.
2. Check supply pressure as outlined above.
1. Replace combination control valve.
CORRECTIVE ACTION
Page 20