Carrier AIR-COOLED CONDENSER UNITS 09BY006-024 - Manual (Page 15)

TO CHANGE FAN WHEEL — If a fan wheel should fail,
it may be replaced as follows:
1. Remove belts from fan pulley.
2. Loosen locking collars on the fan bearings and set screws
on the fan wheels.
3. Remove the shaft through the access panel on either side
of the unit.
4. Remove the fan cut-off plate in the fan discharge.
5. Remove the fan wheel through the fan discharge
opening.
6. Replace the wheel, and reverse Steps 1-4 above.
TO REPLACE FAN BEARING — If a fan bearing fails,
replace it as follows:
1. Remove belts from the fan pulley.
2. Support fan shaft.
3. Loosen locking collar on fan bearing.
4. Remove bearing from the shaft.
5. Install new bearing onto the shaft, and reverse Steps 1-3
above.
NOTE: Fan bearing and shaft are metric sizes.
MAINTENANCE
Cleaning — The 09BY unit should be thoroughly cleaned
inside and out. Frequency of cleaning will depend on unit
location and area conditions.
Drains must be kept free of dirt and trash. Coils can be
cleaned with a stiff brush, vacuum cleaner, or compressed
air. Coil can be reached through access panels.
Inspection — Check coil baffles for tight fit to prevent
air from bypassing the coil.
Check panels for air leakage, particularly those sealing the
fan and coil compartments.
Check for loose electrical connections, oil level, proper
refrigerant charge, and refrigerant piping leaks. The 09BY
fan motor and fan shaft bearings are permanently lubricated.
Further lubrication is not required. Before start-up, be sure
all service valves are open (backseated).
Air Filters — Air filters may be installed on the con-
denser air inlet. Air filters should be replaced or cleaned on
a regular basis depending on how dirty the operating envi-
ronment is. Failure to clean air filters regularly will result in
loss of unit performance and possible nuisance tripping of
the high-pressure switch.
Condensate Drain — If the 09BY unit is used with a
condensate drain to remove rain water, the drain pan and
trap should be cleaned at least twice per year. After cleaning,
test the condensate drain for proper operation by pouring a
bucket of water into the condensate drain pan. The water
should flow out immediately and evenly.
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