Lanair MXD300 - Manual (Page 43)

Section 13 - Service / Maintenance
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39
Ignitor Replacement /
Adjustment
1. Disconnect power to the heater.
2. Remove the pre-heater assembly
from the burner housing.
Disassemble and clean all parts
as instructed on pages
33-37.
3. Using a 1/4" Allen wrench,
carefully remove the one-piece
ignitor from the air pre-heater.
4. Install a new one piece ignitor
(P/N 3728) to the top of the air
pre-heater. NOTE: The tips of the
ignitor should be 3/8" above the
center of the nozzle assembly
and should extend approximate-
ly 1/8" beyond the end of the
nozzle. The tips of the one piece
ignitor should be 1/8" apart.
Adjust as required and tighten
nut on the top of the ignitor (see
illustrations for clarification of
placement).
5. Re-assemble pre-heater assembly
(see pages 33-37) carefully re-
install the pre-heater assembly
into burner housing. The turbula-
tor should be approximately 1/4”
from the end of the burner tube.
Adjust as required and secure the
pre-heater assembly to the burn-
er housing by tightening the
adjustment screw on the side of
the burner housing (see illustra-
tion).
Turbulator 1/4” max. from
end of the tube
Pre-heater Assembly
adjustment screw
electrodes should extend approximately
1/8” beyond nozzle tip
3/8”
1/16”
Side View
Top View
1/8”