Heatilator • BCBV36 • 4008-033 • Rev P • 8/12
36
B. Intellifire Ignition System
(continued)
4
.
Pilot lights but continues
to spark, and main burner
will not ignite. (If the pilot
continues to spark after
the pilot flame has been lit,
flame rectification has not
occurred.)
A
.
A shorted or loose connection
in flame sensing rod.
Verify all connections to wiring diagram in manual. Verify connections
underneath pilot assembly are tight. Verify connections are not
grounding out to metal chassis, pilot burner, pilot enclosure or screen
if present, or any other metal object.
B
.
Poor flame rectification or
contaminated flame sensing
rod.
With fixed glass assembly in place, verify that flame is engulfing
flame sensing rod on left side of pilot hood. Flame sensing rod
should glow shortly after ignition. Verify correct pilot orifice is
installed and gas inlet is set to pressure specifications. Clean flame
sensing rod with emery cloth to remove any contaminants that may
have accumulated on flame sensing rod.
C
.
Module is not grounded.
Verify module is securely grounded to metal chassis of appliance.
Verify that wire harness is firmly connected to the module.
D
.
Damaged pilot assembly or
contaminated flame sensing
rod.
Verify that ceramic insulator around the flame sensing rod is not
cracked, damaged, or loose. Verify connection from flame sensing
rod to white sensor wire. Clean flame sensing rod with emery cloth
to remove any contaminants that may have accumulated on flame
sensing rod. Verify continuity with a multimeter with ohms set at
lowest range. Replace pilot if any damage is detected.
E
.
Module.
Turn ON/OFF rocker switch or wall switch to OFF position. Remove
ignitor wire “I” from module. Place ON/OFF rocker switch or wall
switch in ON position. If there is no spark at “I” terminal module must
be replaced. If there is a spark at “I” terminal, module is fine.
5
.
The pilot and main
burner extinguish while in
operation.
A
.
No LP in tank.
Check the LP (propane) tank. Refill the fuel tank.
B
.
Improper gas inlet pressure.
Verify with manometer. NG should read 5-14 inches w.c. LP should
read 10-14 inches w.c.
C
.
Inner vent pipe leaking exhaust
gases back into the system.
Check venting system for damage. Replace/repair improperly
assembled pipe sections.
D
.
Glass installed improperly.
Check to ensure glass is installed properly. Replace glass panel
assembly.
E
.
Improper vent cap installation.
Check for proper installation and freedom from debris or blockage.
F
.
High limit switch has been
automatically activated.
This appliance is equipped with an auto reset high limit switch
which will shut down the appliance if it spills under flue blockage or
excessive negative pressure conditions. Shut off the appliance and
the gas supply. Do not attempt to operate the appliance until it has
been examined by a qualified service technician.
