COZY VC201C Consignes D'installation Et D'utilisation page 12

TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN ) - MAIN BURNER
SYMPTOM
Flame Too 1. Defective operator section of gas valve.
Large
2. Burner orifice too large.
3. Pressure regulator malfunction.
1. Noisy pilot.
Noisy
Flame
2. Burr in orifice
(if it whistles or resonates).
3. Excessive gas input.
Yellow Tip 1. Clogged main burner ports.
Flames
2. Clogged draft hood.
3. Linted up air shutter.
(Some yellow
tipping on Propane
Gas is permissible)
Floating Flame
1. Blocked venting.
Gas 1. Chimney or flue obstruction.
Odor
2. Drafts around heater.
3. Gas leak.
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 unit.
6. Pilot lighter door open causing
disturbance of pilot flame.
7. Improper venting.
8. Pressure regulator malfunction.
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.
3. Pressure regulator.
4. Thermostat capillary tube damaged.
Not 1. Heater undersized.
Enough
Heat
2. Temperature dial set too low.
3. Incorrect gas supply pressure.
Too Much 1. Temperature dial set too high.
Heat
2. Combination control
valve sticks open.
1017755-B
POSSIBLE CAUSES CORRECTIVE ACTION
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. 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. Clean flue.
2. Eliminate drafts.
3. Shut off gas service immediately. Check piping. Call gas company. See "For
Your Safety" (Page 10), and "Gas Supply" (Page 6).
1. Check pilot orifice, clean, increase pilot gas flow if necessary by adjusting at
combination control valve (See Fig. H-1 on page 9).
2. Clean burner ports (do not enlarge ports).
3. Check gas supply pressure. See "Gas Supply" (Page 6).
4. Supply piping is inadequately sized. Consult local gas utility or competent
installer.
5. Eliminate drafts.
6. Close pilot lighter door.
7. See "Venting" (Pages 3-5).
8. Regulator must be adjusted by a qualified serviceman using proper tools and
instruments.
1. Open all manual gas valves.
2. Replace gas valve.
1. See the "Venting" section (Pages 3-5).
1. Clean or replace valve.
2. To correct this situation contact the utility supplying the gas.
See the "Gas Supply" section (Page 6).
1. Re-check gas input. See "Gas Supply" section (Page 6).
2. Check orifices for clogging. If clogged, clean out the hole carefully with a
smooth wood toothpick. (Do not in any way enlarge or distort it).
3. Regulator must be adjusted by a qualified serviceman using proper tools and
instruments.
4. Replace bulb control switch.
1. This is especially true when a dwelling or room is enlarged. Have the heat
loss calculated and compare to the heater output (70% of input). Your
gas company or installer can supply you with this information. If heater is
undersized, replace with correct size unit.
2. Raise setting of temperature dial. See "Lighting & Shutting Down
Instructions." (See page 10).
3. Check gas supply pressure and regulator pressure as outlined above.
1. Lower setting of temperature dial. See "Lighting & Shutting Down
Instructions" on page 10.
2. Replace combination control valve.
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