Napoleon GVF40P Installation And Operating Instructions Manual page 33

SYMPTOM PROBLEM
Pilot goes out while
Gas piping is undersized.
standing; Main burner
is in 'OFF' position.
Pilot flame is not large enough.
Flames are consis-
Unit is over-fired or under-fired.
tently too large or too
small. Carboning
occurs.
Air shutter improperly adjusted.
Carbon is being
Air shutter has become blocked.
deposited on logs or
combustion chamber
surfaces.
Flame is impinging on the logs or
combustion chamber.
Exhaust fumes
Not enough combustion air.
smelled in room,
headaches.
Not enough ventilation air.
Flame is impinging on the logs or
combustion chamber.
Remote wall switch is
Wall switch is mounted upside
in "off" position; main
down.
burner comes on
when gas knob is
Remote wall switch is grounding.
turned to "ON"
position.
Remote wall switch wire is
grounding.
Faulty valve.
B A
TEST SOLUTION
- Turn on all gas appliances and see if pilot flame flutters,
diminishes or extinguishes, especially when main burner
ignites. Monitor appliance supply working pressure.
- Check if supply piping size is to code. Correct all undersized
piping.
- ODS Burner requires checking.
- 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 OVERTORQUE.
Leak test with a soap and water solution.
- Return air shutter to specified opening, see "VENTURI
ADJUSTMENT" section.
- Ensure air shutter opening is free of lint or other obstructions.
- Check that the logs are correctly positioned.
- Open air shutter to increase the primary air. See air shutter
openings, page 15.
- Check the input rate: check the manifold pressure and orifice
size as specified by the rating plate values.
- Increase fresh air supply. (Use one of the methods described
in ANSI Z223.1 Section 5.3 or the applicable local code.)
- Increase fresh air supply. (Use one of the methods described
in ANSI Z223.1 Section 5.3 or the applicable local code.)
- Check that the logs are correctly positioned.
- Open air shutter to increase the primary air. See air shutter
openings, page 15.
- Check the input rate: check the manifold pressure and orifice
size as specified by the rating plate values.
- Reverse.
- Replace.
- Check for ground (short); repair ground or replace wire.
- Replace.
42.4_2
W415-0810 / 06.11.09
33