Carrier 58DR - Manual (Page 9)

PILOT
ADJUSTMENT-
IN LE'
PRES
TAP
OUTLET
PRESSURE TAP A87230
Fig. 14—White Rodgers Model 36E
A. Air Filter
Each furnace accommodates two filters which can be
installed above the furnace in the return-air plenum. See
Fig. 11.
To clean or replace the filters, proceed as follows:
1. Disconnect electrical power before removing access
panel.
2. Remove upper access door.
3. Reach up behind top plate, tilt filters toward center of
return-8ur plenum, remove filters, and replace or clean
as needed.
4. Some furnaces are equipped with permanent, washable
filters. Clean those filters as follows:
a. Clean with tap water.
b. Rinse and let dry. No oihng or coating of filters is
required.
c. Reinstall filters with cross-hatch binding facing
blower.
B. Blower Motor Wheel
For long life, economy, and high efficiency; clean accumu­
lated dirt and grease from blower wheel and motor annually.
Lubricate motor every 5 years if motor is used on intermit­
tent operation (thermostat FAN switch in AUTO position),
or every 2 years if motor is in continuous operation (thermo­
stat FAN switch m ON position).
Clean and lubricate as follows:
1. Remove upper access door.
2. Loosen screw in vent pipe enclosure front and remove
vent enclosure front by sliding forward (toward front of
unit).
3. Disconnect vent pipe at first joint above unit and
swing vent pipe assembly to side, supported by suit­
able means (block of wood, etc.).
4. Slide vent pipe upward through rectangular opening in
top plate and remove vent pipe from furnace.
5. Remove four screws in vent pipe enclosure back, and
remove enclosure back by tilting top toweurd blower
and sliding bottom toward front of furnace.
6. Disconnect electrical leads from right side of motor
speed selector. Note location of wires for reassembly.
7. Remove screws holding blower assembly against
blower deck and shde blower assembly out of furnace.
8. Squeeze side tabs of motor speed selector and puU it
from blower housing.
9. Units with motor capacitor, loosen screw in strap hold­
ing capacitor to blower housing and shde capacitor
from under strap.
10. Mark blower wheel, motor, and motor support in rela­
tion to blower housing before disassembly, to insure
proper reassembly.
11. Loosen setscrew holding blower wheel onto motor
shaft.
12. Remove bolts holding motor mount to blower housing
and shde motor and mount out of housing. Some
motors have a ground wire attached to blower housing;
disconnect it also.
13. Lubricate motor (when oilers are provided).
a. Remove dust caps or plugs from oil ports located at
each end of motor.
b. Use good grade of SAE 20 nondetergent motor oil
and put one teaspoon, 5cc, 3/16 oz., or 16 to 25
drops in each oU port.
c. AUow time for total quantity of oil to be absorbed
by each bearing.
d. After oihng motor, be sure to wipe excess oil from
motor housing.
e. Replace dust caps or plugs on oil ports.
14. Remove blower wheel from housing.
a. Mark blower wheel orientation and cutoff location
to insure proper reassembly.
b. Remove screws holding cutoff plate and remove cut­
off plate from housing.
c. Lift blower wheel from housing through opening.
15. Clean blower wheel and motor by using vacuum with
soft brush attachment. Care must be exercised not to
disturb balance weights (chps) on blower wheel vanes.
Also do not drop or bend wheel, as balance wih be
affected.
16. Reassemble blower by reversing procedures 14a thru
14c. Be sure wheel is positioned for proper rotation.
17. Reassemble motor and blower by reversing procedures
8 thru 12. If motor has ground wire, be sure it is con­
nected as before. Be sure the blower wheel setscrew is
on the flat of the motor shaft when tightening the
setscrew.
18. Reinstall blower assembly in furnace.
19. Reinstall vent enclosure back.
1
A
Fig. 15—Dual Blower With Left-Hand
Housing and Wheei Removed
20. Reinstall vent pipe through opening in top plate, secure
to drafthood and connect remainder of vent pipe
assembly.
21. Reinstall vent enclosure front, and secure with screw.
• 22. Connect electrical leads to Molex speed selector. Please
note that connections are polarized for assembly— do
not force.
23. Reinstall access door.
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