Lennox Elite OF23 Lo-Boy (Front Flue), Unit Information

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3−Removing Gun Assembly
1− Loosen the screw to the back access door until door
opens. See figures 30 and 31.
2− Remove flare fitting nut on oil line at pipe adjusting
plate located on outside of blower housing.
3− Remove nut connecting oil line to gun assembly oil
line. See figure 32.
4− Remove gun assembly from air tube.
5− Remove transformer leads.
NOTE−When reinstalling gun assembly, check and
set position and Z" dimension as shown in figure
27.
NOTE−When reconnecting gun assembly oil line, make
sure flat side of nut goes first.
FIGURE 32
GUN ASSEMBLY
Gun
Assembly
Remove
both nuts
4−Removing Oil Pump
1− Disconnect supply line at pump and oil line at gun
assembly.
2− Loosen two bolts on sides of pump securing pump
to blower housing. See figure 33.
3− Detach pump and motor shaft coupler from pump.
FIGURE 33
OIL PUMP
OIL PUMP MOTOR
BOLT BOLT
SUPPLY LINE
INLET
OIL LINE GUN
ASSEMBLY ENTRANCE
5−Removing Motor / Combustion Air Blower
1− Disconnect supply line at pump and oil line at gun
assembly as shown in figure 33.
2− If motor and blower wheel are to be removed away
from the burner, disconnect motor wiring harness
from the primary control. If the motor and blower
wheel only need to be removed to check and clean,
there is adequate wire in the motor wiring harness
without disconnecting.
3− Loosen two bolts securing motor to blower hous
ing. Key hole slots are provided for easy removal.
See figure 34.
4− Loosen allen set screw holding the blower wheel
onto the motor shaft and remove blower wheel.
FIGURE 34
COMBUSTION AIR MOTOR & WHEEL
BOLT
BOLT
BLOWER
MOTOR
PUMP
NOTE−When reinstalling blower wheel use the AFII mul
tipurpose gauge (Beckett part # T−500) to space the dis
tance from the back of the blower wheel to the face of the
motor (1/16" [2 mm]).
B−Removing Indoor Blower
1− Turn off electric power to furnace.
2− Remove blower access door.
3− Remove two screws located in the front blower rails. See
figure 35.
4− Pull blower forward enough to disconnect the motor leads
and the secondary limit on OHR units.
5− Pull blower assembly out and place to the side.
FIGURE 35
INDOOR BLOWER (OHR23 SHOWN)
SCREW
SCREW
SECONDARY
LIMIT
(OHR only)
MOTOR LEADS