Carrier 380B - Manual (Page 14)

Remove tubing section remaining in threaded
portion of fitting. Discard locknut.
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 [221 C]).
LEAK SWEAT CONNECTION — Frontseat
service valves and relieve refrigerant pressure in
tubing. Clean and flux area around leak and apply
low-temperature solder (430 F [221 C]).
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 3.
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 around hub to
prevent entry of water between hub and shaft.
Make sure fan is positioned correctly as shown
in Fig. 20.
Fig, 20 — Condenser Fan Position
MAINTENANCE
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.
COMPRESSOR contains factory oil charge. If oil
requires replenishment, see Table? for oil recharge
and Carrier Standard Service Techniques Manual,
Chapter 1, Refrigerants, page 1-21, for instruc­
tions. Use Carrier PP33-1, Texaco Capella B or
Suniso 3G oil.
Coil Cleaning
to be done at the beginning of
each cooling season or more often if required.
1. Shut off power to unit.
2. Remove louvered casing by taking out 16 screws
securing it to the cabinet and sliding it away from
the coil.
3. Clean coil using vacuum cleaner and its crevice
tool (see Fig. 21). Work crevice tool vertically
making sure tool only touches dirt on fins. To
prevent fin removal, do not “scrub” fins with
tool or move tool horizontally.
4. If oil deposits are present, spray coil with house­
hold detergent (Fantastic, Lestoil, 409, or any
similar type). Wait 10 minutes then proceed to
step 5.
5. Using garden hose, spray coil vertically down­
ward with a constant stream of water at moderate
pressure (see Fig. 22). Keep nozzle at a 15 to 20
degree angle, about 3 in. (76 mm) from coil face
and 18 in. (457 mm) from tube. Spray so debris is
washed out and away from coil.
6. Reinstall louvered casing being careful not to
damage coil.
7. Restore power to unit.
f
c.
Fig. 21 — Crevice Cleaning Tool
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