Trouble Shooting Chart - COZY CF353C-H, CF503C-H, CF653C-H, CF354C-H, CF504C-H, CF654C-H, CF357C-H, CF557C-H, CF358C-H, CF558C-H Installation And Operating Instructions Manual

TROUBLE SHOOTING CHART for qualified serviceman - MAIN BURNER
SYMPTOM
Flame too large
Noisy Flame
Yellow tip flame (some
yellow tipping on LP
gas is permissible
Floating Flame
Gas Odor
Delayed Ignition
Failure to Ignite
Condensation of
Water Vapor
Burner won't
turn off
Incorrect Gas Input
Not enough heat
Too much heat
TROUBLE SHOOTING CHART - PILOT AND 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.
1. Noisy pilot.
2. Burr in orifice (if it whistles or resonates).
3. Excessive gas input.
1. Clogged main burner ports.
2. Clogged draft hood.
3. Linted up mixer opening.
1. Blocked venting.
1. Gas leak.
2. Chimney or flue obstruction.
3. Drafts around appliance.
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. Drafts around appliance.
6. Bad venting.
1. Main gas off.
2. Defective gas valve.
1. Improper venting.
1. Defective or sticking automatic valve.
2. Excessive gas pressure (The supply gas
pressure must not exceed 1/2 psi or
14" w.c.
1. Gas input not checked.
2. Clogged orifice.
1. Appliance undersized.
2. Incorrect supply pressure.
1. Combination control valve sticks open.
1. Gas valve not turned on.
2. No voltage to valve.
3. Defective thermostat.
4. No 115 Volt Line Voltage.
5. Auxiliary limit switch open.
6. Blocked flue switch open.
7. Gas valve defective.
1. Replace complete valve.
2. Check with local gas company for proper
orifice size and replace.
3. Refer to orifice chart on Page 9.
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.
1. Turn gas valve to "on" position".
2. Check for 24 Volts to Valve.
3. Check wall thermostat.
4. Jump fan switch to check for voltage (fan will
come on).
5. Push on red buton to close.
6. Push red button in to close.
7. Replace gas valve
Page 18
CORRECTIVE ACTION