1017480-A
Page 12
Flame Too
Large
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN ) -
MAIN BURNER
1. Defective operator section of gas valve.
2. Burner orifice too large.
3. Pressure regulator malfunction.
1. Replace complete valve.
2. See orifice chart to determine the correct size for your Model Number & elevation.
3. Regulator must be adjusted by a qualified serviceman using proper tools
and instruments.
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 air shutter.
1. Blocked venting.
1. Chimney or flue obstruction.
2. Drafts around heater.
3. Gas leak.
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. 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 unit.
6. Pilot lighter door open causing
disturbance of pilot flame.
7. Improper venting.
8. Pressure regulator malfunction.
Noisy
Flame
Yellow Tip
Flames
(Some yellow
tipping on LP Gas
is permissible)
Floating Flame
Gas
Odor
Failure to
Ignite
Burner Won’t
Turn Off
Delayed
Ignition
1. Reduce pilot gas with adjusting screw on combination gas.
(See Fig. H-1)
.
2. Remove burr or replace orifice
(Do not enlarge orifice)
.
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 and around the shutter.
1. Clean flue passageways to relieve blockage.
1. Open all manual gas valves.
2. Replace gas valve.
1. Clean or replace valve.
2. To correct this situation contact the utility supplying the gas.
See the “Gas Supply” section
(Page 5)
.
1. Check pilot orifice, clean, increase pilot gas flow if necessary by adjusting at
combination control valve
(See Fig. H-1 on page 8)
.
2. Clean burner ports
(do not enlarge ports)
.
3. Check gas supply pressure. See “Gas Supply”.
4. Supply piping is inadequately sized. Consult local gas utility or competent
installer.
5. Eliminate drafts.
6. Close pilot lighter door.
7. See “Venting”
(Page 3)
.
8. Regulator must be adjusted by a qualified serviceman using proper tools and
instruments.
1. Improper venting.
Condensation
of Water Vapor
1. See the “Venting” section
(Pages 3-4)
.
1. Clean flue.
2. Eliminate drafts.
3. Shut off gas service immediately. Check piping. Call gas company. See “For
Your Safety”
(See Page 1)
, and “Gas Supply”
(See Page 5)
.
