LUBRICATION
The indoor blower motor sleeve
bearings and induced draft motor are
prelubricated and should not require
attention for an indefinite period of
time. However, these are some
recommendations:
1. Motors without oiling ports -
prelubricated and sealed. No
further lubrication is required. In
case of bearing problems, have
a qualified service technician
replace the motor.
2. Motors with oiling ports - add
10 to 20 drops of Electric Motor
Oil to each bearing every two
years for somewhat continuous
duty, or at least every five years
for light duty. DO NOT over oil.
Excessive lubrication can
damage the motor. Lubrication
must be done by a qualified
service technician.
3.
To access oiling ports or to
relubricate sealed indoor blower
motor bearing, remove the
blower assembly and motor.
A. Remove the wiring from the
control board compartment.
B. Remove the two screws at the
front of the blower housing,
securing the assembly to the
blower shelf flange.
C. Slide the blower assembly
forward until it slides off the
shelf track.
D. Loosen the set screw(s)
securing the blower wheel to
the motor shaft, remove any
motor ground
wire,remove
the screws from the motor
mounting bracket legs.
E. Slide the bracket assembly
from the housing.
F. Lubricate the motor bearings.
G. Reassemble using the
reverse procedure outlined
above.
Exercise care when sliding the blower
assembly into the shelf track and be
sure that the rear flange engages
properly. This procedure should be
done by a qualified technician.
A qualified installer, service agency,
or gas supplier should clean the
motor periodically to prevent the
possibility of overheating due to an
accumulation of dust or dirt on the
windings and the motor exterior. If the
motor needs cleaning, clean the
blower wheel also. A blower wheel
loaded with dirt or dust limits air flow,
eventually causing furnace damage.
As suggested earlier, clean or
replace the air filters. Dirty filters
restrict airflow and adversely affect
blower and furnace operation.
BURNER AND HEATING
COMPONENTS
The furnace should operate for many
years with no malfunctions. However,
a qualified service technician should
inspect the heat exchanger
passages, the venting system and
the burners for correct operation, and
for any signs of corrosion. The heat
exchanger passages and vent
system should be inspected (and
cleaned if required) by a qualified
technician annually.
If the heat exchanger must be
removed,
a qualified installer,
service agency or gas supplier
should follow these procedures.
1.
Tum off furnace electrical power
and set the thermostat lever to
its lowest temperature.
2. Shut off the gas supply to the
furnace either at the meter or at
a manual valve in the supply
piping.
3.
Remove the burner door.
On downflow and dedicated
horizontal models, the blower
door and burner door flange
must also be removed.
4.
Disconnect the gas supply piping
from the gas valve.
5. Remove screws (4) connecting
the burner tray to the center
panel.
6.
Mark all wires on the gas valve
for proper reconnection
and
disconnect the gas valve wiring.
7. Remove the burner tray and
manifold assembly from the unit.
8. Remove all screws in the unit top
plate. Remove the wires and
tube from the pressure switch.
Remove the top plate with the
pressure switch attached.
9. Remove the draft inducer wiring.
Remove screws connecting the
draft inducer to the center panel.
Take care not to damage the
gasket behind the draft
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inducer.
10. Remove screws ( 11 ) on heat
exchanger perimeter. With hot
surface ignition, remove the
connecting screws along with
the associated wiring.
11. With an upward and forward
motion, lift the heat exchanger
from the unit.
12.
Clean or replace the heat
exchanger, if necessary, and
reinstall.
13.
Reassemble the furnace in
reverse order.
A WARNING:HOLES IN THE
VENT PIPING OR HEAT
EXCHANGER CAN ALLOW TOXIC
FUMES TO ENTER THE HOME.
REPLACE THE VENT PIPE OR
HEAT EXCHANGER IF LEAKS
ARE FOUND.
FAILURE TO FOLLOW THIS
WARNING MAY CAUSE
PRODUCTS OF COMBUSTION TO
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CIRCULATE INTO THE LIVING
SPACE CREATING POTENTIALLY
HAZARDOUS CONDITIONS,
INCLUDING CARBON MONOXIDE
POISONING.
The manufacturer recommends that
at the beginning of the heating
season and about midway through
the heating season a qualified
installer, service agency or gas
supplier visually inspect the main
burners and pilot burner for proper
flame characteristics.
Any Low Profile furnace using
existing high temperature S.V.S.
plastic vent piping must have
the vent inspected annually for
any cracks, pipe separation, or
other deterioration of the vent
material.
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