Troubleshooting Guide - Napoleon BGD42 Installation And Operation Instructions Manual

TROUBLE SHOOTING GUIDE
B
EFORE ATTEMPTING TO TROUBLESHOOT
SYMPTOM
Main burner goes out; Pilot fl ame is not large enough or
pilot stays on. not engulfi ng the thermopile
Thermopile shorting
Remote wall switch wire is too
long; too much resistance in the
system.
Faulty thermostat or switch.
Main burner goes out;
Refer to "MAIN BURNER GOES OUT; PILOT STAYS ON"
pilot goes out.
Vent is blocked
Vent is re-circulating
5" fl exible vent has become dis-
connected from fi replace.
Pilot goes out when the System is not correctly purged.
gas knob is released.
Out of propane gas.
The gas valve has
Pilot fl ame is not large enough
an interlock device
Pilot fl ame is not engulfi ng the
which will not allow
thermocouple.
the pilot burner to be
Thermocouple shorting / faulty.
lit until the thermo-
couple has cooled.
Allow approximately
60 seconds for the
t h e r m o c o u p l e t o
Faulty valve.
cool.
Thermostat or switch is defec-
Pilot burning; no gas
tive.
to main burner; gas
knob is on 'HI'; wall Wall switch wiring is defective.
switch / thermostat
is on.
Main burner orifi ce is plugged.
Faulty valve.
Pilot will not light. No spark at pilot burner
Out of propane gas
Spark gap is incorrect
No gas at the pilot burner
Pilot goes out while Gas piping is undersized.
standing; Main burner
is in 'OFF' position.
Flames are consist- Unit is over-fi red or under-fi red.
ently too large or too
small. Carboning oc-
curs.
,
PURGE YOUR UNIT AND INITIALLY LIGHT THE PILOT AND THE MAIN BURNER WITH THE GLASS DOOR REMOVED
PROBLEM
- turn up pilot fl ame.
- replace pilot assembly.
- clean thermopile connection to the valve. Reconnect.
- replace thermopile / valve.
- shorten wire to correct length or wire gauge.
- replace.
- check for vent blockage.
- check joint seals and installation.
- re-attach to fi replace.
- purge the gas line with the glass door removed.
- fi ll the tank.
- turn up the pilot fl ame.
- gently twist the pilot head to improve the fl ame pattern around the thermo-
couple.
- loosen and tighten thermocouple.
- clean thermocouple and valve connection.
- replace thermocouple.
- replace valve.
- replace.
- connect a jumper wire across the wall switch terminals; if main burner lights,
replace switch / thermostat.
- disconnect the switch wires & connect a jumper wire across terminals 1 & 3; if
the main burner lights, check the wires for defects and / or replace wires.
- remove stoppage in orifi ce.
- replace.
- check if pilot can be lit by a match
- check that the wire is connected to the push button igniter.
- check if the push button igniter needs tightening.
- replace the wire if the wire insulation is broken or frayed.
- replace the electrode if the ceramic insulator is cracked or broken.
- replace the push button igniter.
- fi ll the tank.
- spark gap should be 0.150" to 0.175" (5/32" to 11/64" approx.) from the electrode
tip and the pilot burner. To ensure proper electrode location, tighten securing nut
(fi nger tight plus 1/4 turn).
- check that the manual valve is turned on.
- check the pilot orifi ce for blockage.
- replace the valve.
- call the gas distributor.
- turn on all gas appliances and see if pilot fl ame fl utters, diminishes or extin-
guishes, 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" (11" minimum) 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 CLOCK-
WISE FIRMLY TO RESEAL. DO NOT OVERTORQUE.
Leak test with a soap and water solution.
TEST SOLUTION
27
.
W415-0381 / H / 12.07.07