Carrier 542E - Manual (Page 16)

Clean and lubricate the direct-drive blower motor and wheel
as follows;
1. Remove and disassemble blower assembly as follows;
a. Remove blower and control access panels.
b. Refer to unit wiring label and disconnect blower
motor leads from their termination points in unit
control hox. (Be sure to mark wiring label ap­
propriately if lead terminations were changed to
adjust indoor airflow and changes were not previous­
ly marked.)
c. Remove blower assembly from unit. Be careful not to
tear insulation in blower compartment.
d. Ensure proper reassembly by marking blower wheel
and motor in relation to blower housing before dis­
assembly.
e. Loosen setscrew (s) that secures wheel to motor
shaft, remove screws that secure motor mount
brackets to housing, and slide motor and motor
mount out of housing.
2. Lubricate motor as follows;
a. Thoroughly clean all accumulations of dirt or grease
from motor housing.
b. Remove dust caps or plugs from oil ports located at
each end of motor.
c. Use a good grade of SAE 20 nondetergent motor oil
and put one teaspoon, 5cc, 3/16 oz., or 16 to 25 drops
in each oil port.
d. Allow time for oil to he absorbed by each bearing,
then wipe excess oil from motor housing.
e. Replace dust caps or plugs in oil ports.
3. Remove and clean blower wheel as follows;
a. Ensure proper reassembly by marking wheel orien­
tation and cutoff plate location.
b. Remove screws holding cutoff plate, and remove
plate from housing.
c. Lift wheel from housing. When handling and/or
cleaning blower wheel, be sure not to disturb
balance weights (clips) on blower wheel vanes, and
be sure not to drop or bend wheel.
d. Remove caked-on dirt from wheel and housing with
a brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent.
e. Reassemble wheel and cutoff plate into housing.
4. Reassemble motor into housing. Be sure setscrew (s) are
tightened on motor shaft flats and not on round part of
shaft.
5. Reinstall blower assembly into unit and reconnect all
blower motor leads to proper termination points in unit
control box. Replace panels.
6. Restore electrical power to unit. Start unit and check
for proper blower rotation and motor speed.
D. Belt-Drive Indoor Blower and Motor (Size 060, 3-
phase unit)
For longer life, operating economy, and continuing efficien­
cy; clean accumulated dirt and grease from the blower wheel
and motor annually.
Lubricate the motor every 5 years if the motor is used inter­
mittently (thermostat FAN switch in AUTO position), or
every 2 years if the motor is used continuously (theromostat
FAN switch in ON position).
NOTE: Motor may have prelubricated bearings and no oil
ports. When lubrication is required for this type motor, send
the motor to a motor repair shop.
WARNING: Disconnect electrical power to the unit before
cleaning and lubricating the blower motor and wheel.
Clean and lubricate the belt-drive blower motor and wheel
as follows:
1. Lubricate motor with oil ports as follows;
a. Thoroughly clean all accumulations of dirt or grease
from motor housing.
b. Remove dust caps or plugs from oil ports located at
each end of motor.
c. Use a good grade of SAE 20 nondetergent motor oil,
and put one teaspoon, 5cc, 3/16 oz., or 16 to 25 drops
in each oil port.
d. Allow time for oil to be absorbed by each bearing,
then wipe excess oil from motor housing.
e. Replace dust caps or plugs in oil ports.
2. Remove and clean blower wheel as follows:
a. Refer to unit wiring label, and disconnect blower
motor leads from their termination points in unit
control box.
b. Remove blower assembly from unit. Be careful not to
tear insulation in blower compartment.
c. Relieve belt tension, then remove belt from pulleys.
d. Ensure proper reassembly by marking wheel orien­
tation and cutoff plate location.
e. Remove screws holding cutoff plate, and remove
plate from housing.
f. Loosen shaft retainer ring setscrew (located on
wheel side of bearing). Loosen two blower wheel
setscrews. Note location of all spacer washers and
retainer rings for proper reassembly, then remove
pulley and shaft from blower assembly.
g. Lift wheel froih housing. When handling and/or
cleaning blower wheel, be sure not to disturb
balance weights (clips) on blower wheel vanes, and
be sure not to drop or bend wheel.
h. Remove caked-on dirt from wheel and housing with
a brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent. Reassemble wheel, pulley, shaft, and cutoff
plate into housing.
i. Reinstall blower assembly. Replace belt and adjust
tension for approximately one inch of sag under nor­
mal finger pressure midway between pulleys. Recon­
nect blower motor leads in control box.
E. Outdoor Coil, Indoor Coil, and Condensate Drain
Pan
Inspect the outdoor coil, indoor coil, and condensate drain
pan at least once each year. Proper inspection and cleaning
requires the removal of the unit top. See part A of this sec­
tion.
The coils are easily cleaned when dry; therefore, inspect and
clean the coils either before or after each cooling season.
Remove all obstructions including weeds and shrubs that
interfere with the airflow through the condenser coil.
Straighten bent fins with a fin comb. If coated with dirt or
lint, clean the coils with a vacuum cleaner, using the soft
brush attachment. Be careful not to bend the fins. If coated
with oil or grease, clean the coils with a mild detergent-and-
water solution. Rinse coils with clear water, using a garden
hose. Be careful not to splash water on motors, insulation,
wiring, or air filter (s). For best results, spray outdoor coil
fins from inside to outside the unit. Be sure to clean between
the inner and outer coils, and to flush all dirt and debris from
the unit base.
Inspect the drain pan and condensate drain line when
inspecting the coils. Clean the drain pan and condensate
drain by removing all foreign matter from the pan. Flush
the pan and drain tube with clear water. Do not splash water
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