Condenser Fan Motor Protection; Value Fan Mounted Position; Metal (Value Sound) Fans; Aeroacoustic™ (Low Sound) Fans - Carrier 38APS025 Manual

CONDENSER FAN MOTOR PROTECTION — Each con-
denser fan motor is internally protected against overtempera-
ture. They are also protected against a severe overcurrent con-
dition by manual reset, calibrated trip, magnetic circuit break-
ers or fuses on a common circuit. Do not bypass connections or
increase breaker size or fuse to correct trouble. Determine the
cause and correct it before resetting the breaker.
Two types of condenser fans are of-
Condenser Fans —
fered in the 38AP units: metal (value sound) fans, and Aero-
acoustic™ (low sound) fans. Each is addressed below. Each
fan is supported by a formed wire mount bolted to a fan deck
and covered with a wire guard.
METAL (VALUE SOUND) FANS — The exposed end of
fan motor shaft is protected from weather by grease and a rub-
ber boot. If fan motor must be removed for service or replace-
ment, when reinstalling the motor be sure to mount the motor
band in the proper location. Re-grease fan shaft and reinstall
fan guard. For recommended grease information, see the sec-
tion Condenser Fan Blades on page 161. The fan hub must be
facing up. For proper performance, fan web should be 0.32 in.
(8 mm) below top of orifice on the fan deck to top of the fan
hub. See Fig. 177. Tighten set screws to 15 ± 2 ft-lb (20 ± 2.7
N-m). Figure 177 shows the proper position of mounted fan.
IMPORTANT: Check for proper fan rotation (clock-
wise when viewed from above). If necessary, switch
any 2 power leads to reverse fan rotation.
7.00 in. (178 mm)
0.32 ± 0.12 in. (8 ± 3 mm)
MEASURE FROM FAN WEB TOP TO TOP OF FAN DECK ORIFICE.
MIN.
Fig. 177 — Value Fan Mounted Position
AEROACOUSTIC
™
signs have been used for this option and can be distinguished
by the mounting bolt color. Two separate processes are used
depending on the design revision. A shroud and a wire guard
provide protection from the rotating fan.
IMPORTANT: Check for proper fan rotation (counter-
clockwise when viewed from above). If necessary,
switch any 2 power leads to reverse fan rotation.
Gray Bolt — The fan motor shaft is protected from weather by
grease and the fan cover. If fan motor must be removed for ser-
vice or replacement, when reinstalling the motor be sure to
mount the motor band in the proper location. Re-grease fan
shaft and reinstall fan cover. The fan motor has a step in the
motor shaft. For proper performance, fan should be positioned
such that it is securely seated on this step. See Fig. 178. Tighten
bolt to 15 ± 2 ft-lb (20 ± 2.7 N-m). Figure 178 shows the proper
position of mounted fan.
Black Bolt — To remove the fan, a fan puller will likely be
needed. The fan motor shaft is protected from weather by the
fan cover. If fan motor must be removed for service or replace-
ment, when reinstalling the motor be sure to mount the motor
band in the proper location. Do not use grease on the shaft or
key. The fan motor has a step in the motor shaft. For proper
performance, fan should be positioned such that it is securely
seated on this step. Apply Loctite 680 Retaining Compound to
the hub and motor keyway only just prior to installing the key.
See Fig. 179 and 180. Tighten bolt to 24 ± 2 ft-lb (32.5 ± 2.7 N-
m). Figure 181 shows the proper position of mounted fan.
a38-7325
150
(LOW SOUND) FANS — Two
FAN DECK
de-