Napoleon GVFL18 Installation And Operating Instructions Manual page 21

SYMPTOM
Flames are Unit is over-fi red or under-
consistently too fi red.
large or too small.
Carboning occurs.
PILOT SCREW
Air shutter improperly
adjusted.
Exhaust fumes Not enough combustion
smelled in room, air.
headaches.
Not enough ventilation air.
Flame is impinging on
the logs or combustion
chamber.
Remote wall Wall switch is mounted
switch is in "off" upside down.
position; main
Remote wall switch is
burner comes on
grounding.
when gas knob
Remote wall switch wire is
is turned to "ON"
grounding.
position.
Faulty valve.
If optional catalytic Sulphur from fuel is being
door is used, deposited on the glass,
White / grey fi lm logs, rocks, media or
forms on the combustion surfaces.
glass.
PROBLEM
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TEST SOLUTION
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.
Return air shutter to specifi ed opening, see
"VENTURI ADJUSTMENT" section.
Increase fresh air supply. (Use one of the methods
described in ANSI Z223.1 / NFPA 54 or the
applicable local code.)
Increase fresh air supply. (Use one of the methods
described in ANSI Z223.1 / NFPA 54 or the
applicable local code.)
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.
Reverse.
Replace.
Check for ground (short); repair ground or replace
wire.
Replace.
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.
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42.4_3_A
W415-0809 / B / 01.07.11