42
8. Disconnect a gas pipe union and remove the gas manifold
with the gas valve.
9. Remove the two screws attaching the burner rack to the
vestibule plate (see Fig. 56).
10. Remove the pressure switch hose from the connection on
the flue cover assembly (see Fig. 56).
11. Remove the screws around the vestibule plate.
12. Remove the nuts holding the heat exchanger support rack
to the fan deck.
13. Remove the heat exchanger from the unit.
14. Separate the following from the heat exchanger: inducer
fan-motor assembly, flue cover assembly, retainer, regula-
tor, and regulator gasket. See Fig. 56.
Fig. 61 — Spark Adjustment
DETAIL "A" DETAIL "B"
.200 IN. (5.07 mm)
SPARK GAP
.120/.141 IN. (3.05/3.56 mm)
SPARK GAP MUST BE POSITIONED TO
IGNITE ON FIRST TRY. (PLACE
SPARK GAP WITHIN BURNER
CIRCUMFERANCE AS SHOWN)
See
Detail “A”
See
Detail “B”
See
Detail “A”
See
Detail “B”
See
Detail “A”
See
Detail “B”
Low Heat
Medium Heat
High Heat
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