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W415-0809 / A / 05.10.10
SYMPTOM PROBLEM TEST SOLUTION
Flames are
consistently too
large or too small.
Carboning occurs.
Unit is over-fi red or under-
fi red.
- Check pressure readings:
- Inlet pressure can be checked by turning screw (A)
counter-clockwise 2 or 3 turns and then placing
pressure gauge tubing over the test point. Check
with burner operating on “HI”. Gauge should read 7”
(minimum 4.5”) water column for natural gas or 13”
(11” minimum) water column for propane.
- Outlet pressure can be checked the same as above
using screw (B). Check with burner operating on
“HI”. Gauge should read 3.5” water column for
natural gas or 10” water column for propane.
- AFTER TAKING PRESSURE READINGS, BE
SURE TO TURN SCREWS CLOCKWISE FIRMLY
TO RESEAL. DO NOT OVER TORQUE.
- Leak test with a soap and water solution.
Air shutter improperly
adjusted.
- Return air shutter to specifi ed opening, see
“VENTURI ADJUSTMENT” section.
Exhaust fumes
smelled in room,
headaches.
Not enough combustion
air.
- Increase fresh air supply. (Use one of the methods
described in ANSI Z223.1 Section 5.3 or the
applicable local code.)
Not enough ventilation air. - Increase fresh air supply. (Use one of the methods
described in ANSI Z223.1 Section 5.3 or the
applicable local code.)
Flame is impinging on
the logs or combustion
chamber.
- Check that the logs are correctly positioned.
- Open air shutter to increase the primary air. See
“VENTURI ADJUSTMENT” section.
- Check the input rate: check the manifold pressure
and orifi ce size as specifi ed by the rating plate
values.
Remote wall
switch is in “off”
position; main
burner comes on
when gas knob
is turned to “ON”
position.
Wall switch is mounted
upside down.
- Reverse.
Remote wall switch is
grounding.
- Replace.
Remote wall switch wire is
grounding.
- Check for ground (short); repair ground or replace
wire.
Faulty valve. - Replace.
If optional catalytic
door is used,
White / grey fi lm
forms on the
glass.
Sulphur from fuel is being
deposited on the glass,
logs, rocks, media or
combustion surfaces.
- Clean glass with recommended gas appliance glass
cleaner. DO NOT CLEAN GLASS WHEN HOT!
- If deposits are not cleaned off regularly, the glass
may become permanently market.
42.4_3_A
P
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P
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L
O
T
N
O
L
O
T
H
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L
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F
F
O
A
B
PILOT SCREW