31
7. Disconnect the igniter wires and sensor wires at the inte-
grated gas controller (IGC).
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. 50).
10. Remove the pressure switch hose from the connection on
the flue cover assembly (see Fig. 50).
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, regulator gasket, and if a Low NOx unit, also remove
the baffle assembly. See Fig. 50.
Fig. 55 — Spark Adjustment (Size 04-06)
SEE DETAIL "A"
SEE DETAIL "B"
SEE DETAIL "A"
SEE DETAIL "B"
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)
LOW HEAT
3 PHASE
1 PHASE
LOW NOx*
67,000 BTUH
65,000 BTUH
60,000 BTUH
MEDIUM HEAT
3 PHASE
1 PHASE
110,000 BTUH
90,000 BTUH
HIGH HEAT
3 PHASE
1 PHASE
150,000 BTUH
130,000 BTUH
*Only available for Low Heat Units
To Next Page
Loading...
