Trouble Shooting Chart - COZY VC201A-H Installation And Operating Instructions Manual

TROUBLE SHOOTING CHART for qualified serviceman - MAIN BURNER
SYMPTOM
Flame too large
Noisy Flame
Yellow tip flames (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
TROUBLE SHOOTING CHART - POOR HEATING RESULTS
Incorrect gas input
POSSIBLE CAUSES
1. Defective operator section of gas valve.
2. Burner orifice too large.
3. Pressure regulator malfunction.
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. 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.
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"
water column).
1. Gas input not checked.
2. Clogged orifice.
3. Pressure regulator.
4. Thermostat capillary tube damaged.
CORRECTIVE ACTION
1. Replace complete valve.
2. See orifice chart to determine the correct orifice size
for your Model Number and 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. (Fig. 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 1), and
"Gas Supply" (Page 3).
1. Check pilot orifice, clean, increase pilot gas flow if
necessary by adjusting at combination control valve
(Fig. 1).
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 2).
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 "Venting".
1. Clean or replace valve.
2. To correct this situation contact the gas company
supplying the gas. See "Gas Supply".
1. Re-check gas input. See "Gas Supply".
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 gas valve.
Page 11