LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 65)

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Service Manual - NeoTherm 500
The ignitor assembly is a two-rod system that con-
sists of a ground rod and a spark rod.
Adjustment Procedure:
1. Shut off the 120V power supply to the unit.
2. Turn off all manual gas valves connecting the unit
to the main gas supply line.
3. Remove the front door of the unit to gain access
to the ignitor assembly.
4. The end of each spark rod should be 1/4” away
from the burner.
5. Set the gap between the spark rods at 3/16” ±
1/16.”
Replacement Procedure:
1. Shut off the 120V power supply to the unit.
2. Turn off all manual gas valves connecting the unit
to the main gas supply line.
3. Remove the front door of the unit to gain access
to the ignitor assembly.
4. Remove the two wires connected to the assem-
bly.
5. Remove the two bolts connecting the ignitor
assembly to the burner door. Remove the old
ignitor assembly.
6. Install a new assembly by reversing the instruc-
tions listed above. Replace the ignitor assembly
gasket if it is damaged.
Fig. B36-1 - Spark rods and flame sensor
Flame sensor Spark rods
Fig. B36-2 - Correct setting for spark gap
Flame sensor:
1/4” clearance
to burner
Spark rods:
1/4” clearance
to burner
Gap between
spark rods:
3/16” ± 1/16”
B36
Ignitor Assembly