Carrier 38QF - Manual (Page 14)

RETAINER
rLARE NUT
FLARE
CONNECTION
Fig. 22 — AccuRater™ (Bypass Type)
Components
5. Slide piston out by inserting a small soft wire,
with small kinks, thru metering hole. Ensure
metering hole, sealing surface around piston
cones and fluted portion of piston are not
damaged.
6. Clean piston refrigerant metering hole.
7. Replace retainer O-ring before reassembling by­
pass type AccuRater. Carrier O-ring part no. is
99CC501052.
LIQUID LINE STRAINER (protects AccuRater)
made of wire mesh is located in the liquid line inside
38QF unit behind liquid line service valve. Liquid
line is belled and sweat connected where strainer is
located. If strainer is plugged, unsweat belled liquid
line connection and replace strainer. See Fig. 21.
LEAKING SWEAT CONNECTION — Frontseat
service valves and relieve refrigerant pressure in
tubing. Clean and flux area around leak and apply
low-temperature solder (430 F).
Condenser Fan Motor Removal
1. Shut off power to unit. Failure to do so may
result in electric shock or injury from rotating
fan blade.
2. Remove top cover as described on page 2.
3. Disconnect fan motor leads from controls.
4. Remove 6 screws holding fan motor/discharge
grille in place and lift assembly from unit.
5. Remove Carrier nameplate by straightening tabs.
6. Remove 4 nuts holding fan motor to discharge
grille. Remove motor and leads.
7. Reverse procedure for reassembly. Before replac­
ing metal fan, be sure rain shield is in place on
motor shaft. Seal with Permagum sealer around
hub to prevent entry of water between hub and
shaft. Make sure fan is positioned correctly as
shown in Fig. 24.
MSCHARG l SPi.Lf
Rf (048- 060)
FROM DISCHARGE GRILLE
TO TOP OF FAN BLADE
MOTOR
■ .',‘J •-I .'.OF r.S'l'FW
Fig. 24 — Outdoor Fan Position
Compatible Fitting Repair
LEAKING MECHANICAL CONNECTION —
Frontseat outdoor section service valves after reliev­
ing refrigerant pressure in system. Back locknut off
Carrier Compatible Fitting onto tube. Cut fitting
between threads and O-ring shown in Fig. 23.
Remove tubing section remaining in threaded por­
tion of fitting. Discard locknut.
CARRIER
V ■■ .• .........
Clean, flux, and insert new tube end into remain­
ing portion of Carrier Compatible Fitting. Wrap
valve base in wet rag. Heat and apply low-
temperature solder (430 F).
MAINTENANCE
C M ' I I O N : Before pertorming recoinmended
maintenance, be sure unit main power switch is
turned o i l . Failure to do so ma\ result in electric
shock or injtiiy from iota ting fan blade.
Lubrication
FAN MOTOR BEARINGS — Oiling holes are
provided at each end of condenser fan motor. Re­
move fan motor and lubricate motor with 32 drops
(16 drops per hole) of SAE-10 nondetergent oil at
intervals described below.
a. Annually, when environment is very dirty,
ambient temperature is higher than 105 F, and
average unit operating time exceeds 15 hours a
day.
b. Every 3 years when environment is reasonably
clean, ambient temperature is less than 105 F
and unit operating time averages 8 to 15 hours
a day.
c. Every 5 years when environment is clean,
ambient temperature is less than 105 F and unit
operating time averages less than 8 hours a day.
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