Lennox B050A3B, Installation/Servicing Instructions And Users Information Manual

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Page 22 of 36 506307-01 Issue 1207
5. Slide the burner/manifold assembly forward, out of the
furnace until the assembly is clear of the manifold retention
pins.
6. To reinstall the burner/manifold assembly, reverse the
above steps.
Blower Removal/Replacement:
Removal
1. Turn OFF all electrical power to the furnace.
2. Remove the blower access panel.
3. Unplug wires from the blower assembly, auxiliary limit
and door interlock switch to the control box.
4. Remove the two (2) blower retaining screws from the front
blower leg (See Figure 13). These are the two (2) screws
located in the blower compartment that secure the blower
leg to the blower partition panel.
5. Slide the blower forward about two (2) inches. This will
disengage the rear blower leg from the blower partition.
Rotate the blower down to clear the top of the unit and
continue sliding the blower forward until it is out of the
unit.
Replacement
1. Place the blower in the blower opening of the unit and
slide the blower back, into the unit, taking care to clear
the top of the unit.
2. When the blower is completely into the cabinet, rotate the
rear of the blower up so that the face of the rear blower
leg engages the back partition clip in the blower partition.
3. Continue sliding the blower into the unit until the front leg
lies flat against the blower partition and blower retaining
screw holes are aligned. The rear of the blower should
be against the clip in the partition and should be under
the partition clip.
4. Reattach the two (2) blower securing screws, any
disconnected wiring and the blower access panel.
Lubricating Motors:
Direct drive motor and blower assemblies are factory
lubricated and normally do not require oiling. If oiling is
required lubrication of the blower motor is to be preformed
only by a qualified service agency.
Figure 13
BLOWER REMOVAL AND REPLACEMENT