Intellifi Re Ignition System - Heat & Glo SL-950TR-E Owner's Manual

B. Intellifi re Ignition System
Sympton
1. The ignitor/module a. Incorrect wiring.
makes noise, but no
spark.
b. Loose connections or electrical
shorts in the wiring.
c. Ignitor gap is too large.
d. Faulty module.
2. Pilot won't light, a. Transformer installed correctly.
there is no noise or
spark.
b. A shorted or loose connection in wir-
ing confi guration or wiring harness.
c. Improper wall switch wiring.
d. Module not grounded.
e. Faulty module.
3. Pilot lights but con- a. A shorted or loose connection in
tinues to spark, and sensor rod.
main burner will not ig-
nite. (If the pilot contin-
ues to spark after the
b. Poor fl ame rectifi cation or contami-
pilot fl ame has been lit,
nated sensor rod.
fl ame rectifi cation has
not occurred.)
64
Possible Cause
Heat & Glo • SL-550 / 750 / 950TR-E • 2118-900 Rev. K • 9/08
Corrective Action
Verify "S" wire (white) for sensor and "I" wire (orange) for ignitor
are connected to correct terminals on module and pilot assembly.
Reversed wires at the module may cause system to make sparking
noise, but spark may not be present at pilot hood.
Verify no loose connections or electrical shorts in wiring from mod-
ule to pilot assembly. Rod closest to pilot hood should be ignitor.
Verify connections underneath pilot assembly are tight; also verify
connections are not grounding out to metal chassis, pilot burner,
pilot enclosure, mesh screen if present, or any other metal object.
Verify gap of igniter to pilot hood. The gap should be approximately
.17 inch or 1/8 inch.
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. Hold ground wire about 3/16 inch away from
"I" terminal on module. If there is no spark at "I" terminal module
must be replaced. If there is a spark at "I" terminal, module is fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
Verify that transformer is installed and plugged into module. Check
voltage of transformer under load at spade connection on module
with ON/OFF switch in ON position. Acceptable readings of a good
transformer are between 3.2 and 2.8 volts AC.
Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight fi t. Verify pilot assembly wiring to module.
Remove and verify continuity of each wire in wiring harness.
Verify that 110/VAC power is "ON" to junction box.
Verify black ground wire from module wire harness is grounded to
metal chassis of appliance.
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. Hold ground wire about 3/16 inch away from
"I" terminal on module. If there is no spark at "I" terminal module
must be replaced. If there is a spark at "I" terminal, module is fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
Verify all connections to wiring diagram in manual. Verify connec-
tions 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.
Verify that fl ame is engulfi ng sensor rod. If the pilot assembly does
not have a ground strap, consider installing one to increase fl ame
rectifi cation. Verify correct pilot orifi ce is installed and inlet gas
specifi cations. Flame carries rectifi cation current, not the gas. If
fl ame lifts from pilot hood, the circuit is broken. A wrong orifi ce or
too high an inlet pressure can cause pilot fl ame to lift. The sensor
rod may be contaminated. Clean sensor rod with emery cloth.