Napoleon GSS42N Installation And Operating Instructions Manual page 22

22
SYMPTOM
Pilot goes out while
standing; Main burner is in
'OFF' position.
Flames are consistently
too large or too small.
Carboning occurs.
Carbon is being deposited
on logs or combustion
chamber surfaces.
White / grey fi lm forms.
Remote wall switch is in
'OFF' position; main burner
comes on when gas knob
is turned to 'ON' position.
W415-0617 / D / 03.18.11
PROBLEM
Gas piping is undersized.
Unit is over-fi red or underfi red.
Air shutter has become
blocked.
Flame is impinging on the logs
or combustion chamber.
Sulphur from fuel is being
deposited on glass, logs or
combustion chamber surfaces.
Wall switch is mounted upside
down.
Remote wall switch is
grounding.
Remote wall switch wire is
grounding.
Faulty valve.
TEST SOLUTION
- Turn on all gas appliances and see if pilot fl ame fl utters,
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.
- 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. Gauge should read
7" (minimum 4.5") water column for natural gas or 13"
(minimum 11") water column for propane. Check that
main burner is operating on 'HI'.
- Outlet pressure can be checked the same as above
using screw (B). Gauge should read 3.5" water column
for natural gas or 10" water column for propane. Check
that main burner is operating on 'HI'.
- 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.
- 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.
- Check the input rate: check the manifold pressure and
orifi ce size as specifi ed by the rating plate values.
- Clean the glass with a recommended gas appliance
glass cleaner.
- DO NOT CLEAN GLASS WHEN HOT.
- If deposits are not cleaned off regularly, the glass may
become permanently marked.
- Reverse.
- Replace.
- Check for ground (short); repair ground or replace wire.
- Replace.
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