Product Manual

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Section 12 - Service / Maintenance
1. Disconnect power to the heater.
2. Access and remove the preheater
assembly from inside the burner
assembly.
3. Remove the retaining nut and care-
fully remove the one-piece ignitor
from the preheater.
4. Install a new one piece ignitor (P/N
3728) to the top of the preheater, if
necessary.
5. Adjust the position of the ignitor and
tighten the nut to secure it in place.
The tips of the ignitor should be
3/8” above the center of the nozzle
assembly and should extend ap-
proximately 1/8” beyond the end
of the nozzle. The gap between the
electrode tips of the ignitor should
measure 1/8” at the closest point.
6. Use the tool included with the heater
to set the position of the preheater,
then secure it in place.
Igniter Replacement /
Adjustment
Electrodes should extend approximately 1/8 in.
beyond the nozzle tip
Side View
Top View
3/8 in.
1/8 in.
Turbulator
Preheater-Assembly
Adjustment Screw