20
W415-0807 / C / 09.02.16
SYMPTOM
PROBLEM
TEST SOLUTION
Pilot goes out while stand-
ing; Main burner is in ‘OFF’
position.
Gas piping is undersized.
-
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.
Flames are consistently
too large or too small.
Carboning occurs.
Unit is over-fi red or underfi 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. Gauge
should read as described on the chart below. Check
that main burner is operating on ‘HI’.
-
Outlet pressure can be checked the same as above
using screw (B). Gauge should read as described on
the chart below. 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.
-
-
-
Carbon is being deposited
on logs or combustion
chamber surfaces.
Air shutter has become
blocked.
-
Ensure air shutter opening is free of lint or other
obstructions.
Flame is impinging on the logs
or combustion chamber.
-
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.
White / grey fi lm forms.
Sulphur from fuel is being de-
posited on glass, logs or com-
bustion chamber surfaces.
-
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.
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 ground-
ing.
-
Replace.
Remote wall switch wire is
grounding.
-
Check for ground (short); repair ground or replace wire.
Faulty valve.
-
Replace.
Pilot is not functioning
properly.
Pilot has been painted
-
Using a piece of sandpaper or emery cloth remove the
paint from the pilot hood, ignitor and fl ame sensor.
42.10_2B
PIL
O
T
Pressure
Inlet
Outlet
Natural Gas
(inches)
Natural Gas
(millibars)
Propane
(inches)
Propane
(millibars)
7"
(MIN. 4.5")
3.5"
13"
(MIN. 11")
10"
17.4mb
(MIN. 11.2mb)
8.7mb
32.4mb
(MIN. 27.4mb)
24.9mb
