Trouble Shooting Chart - COZY W255G Installation And Operating Instructions Manual

TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN ) - MAIN BURNER
SYMPTOM POSSIBLE CAUSES
Flame Too 1. Defective operator section
Large of gas valve.
2. Burner orifice too large.
3. If installed above 2,000 ft.
Flame Pops 1. Too much primary air.
Back
1. Too much primary air.
Noisy
Flame
2. Noisy pilot.
3. Burr in orifice
(if it whistles or resonates).
4. Excessive gas input.
1. Too little primary air.
Yellow Tip
Flame
2. Clogged main burner ports.
(Some
yellow tipping on
3. Clogged draft hood.
L.P. gas is
4. Linted up air shutter.
permissible)
1. Blocked venting.
Floating
Flame
2. Insufficient primary air.
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. Air shutter open too far.
6. Drafts around appliance.
7. Bad venting.
1. Main gas off.
Failure
to Ignite
2. Defective gas valve.
1. Improper venting.
Condensation
of Water Vapor
1. Defective or sticking
Burner Won't
automatic valve.
Turn Off
2. Excessive gas pressure
(The supply gas pressure
must not exceed 1/2 psi or
14" water column).
1. Gas input not checked.
Incorrect
Gas Input
2. Clogged orifice.
1. Appliance undersized.
Not
Enough
Heat
2. Temperature dial set too low.
(Bulb type valves).
3. Incorrect supply pressure.
1. Temperature dial set too high.
Too Much
Heat
2. Combination control
valve sticks open.
CORRECTIVE ACTION
1. Replace complete valve.
2. Check with local gas company for proper orifice size & 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 & Shutting Down Instructions"
on page 11.
3. Check supply pressure as outlined above.
1. Lower setting of temperature dial. See "Lighting & Shutting Down Instructions"
on page 11.
2. Replace combination control valve.
page 19
84502-C