Carrier 38SE - Manual (Page 11)

8. Remove compressor from base pan and replace with new
compressor. Install crankcase heater (step 2) on new
compressor.
9. Replace coil-fan-top cover assembly on compressor-base
pan assembly; reconnect all joints and wiring; recharge
unit.
COMPATIBLE FITTING REPAIR
Leaking Mechanical Connection — Frontseat condensing
unit service valves and reheve refrigerant pressure in tubing.
Back locknut off compatible fitting onto tube. Cut fitting
between threads and seal ring head as shown in Fig. 9.
Remove tubing section remaining in threaded portion of
fitting. Discard locknut.
Clean, flux, and insert new tube end into remaining por­
tion of compatible fitting. Wrap valve base in wet rag. Heat
and apply low-temperature (450 F) solder.
Fig. 9 — Repair of Mechanical Connection
Metal Fan — Required fan position is shown in Fig. 10.
Adjust fan by loosening setscrew and moving fan blades up
or down.
Fan Motor Removal
1. Shut off power to unit.
2 Remove unit top cover (grille). Open or remove service
door. With door open, remove control panel cover.
3. Disconnect fan motor leads (3) from control panel
located on service door. See Fig. 7.
4. Remove fan from motor shaft by loosening setscrew and
pulling upward on fan hub.
5. Remove bolt holding fan motor to motor mounting
bracket. Remove motor with wiring thru top of unit. To
replace motor, place motor on self-positioning motor
mounting bracket and retighten bolt.
Before replacing metal fan, be sure moisture protectors
are in place on motor shaft.
Leaking Sweat Connection — Frontseat service valves and
relieve refrigerant pressure in tubing. Clean and flux area
around leak and apply low-temperature (450 F) solder.
Evacuate or purge evaporator coil and tubing system.
Add refrigerant charge (see charging instmctions).
CONDENSER
Coil Cleaning — Ensure power to unit is shut off. Clean the
condensing unit coil at the beginning of every cooling
season or more often if required. Use ordinary garden hose
at a pressure high enough to clean efficiently. For best
results, unscrew and remove unit top cover (grille). Insert
hose nozzle between fan blades and spray coil fins from
inside-to-outside the unit. If unit has a double-row coil,
loosen screws to separate coils, and flush dirt toward
outside of both coils. Flush dirt from base pan by spraying
water thru top of unit. Avoid splashing mud on coil or
water on the fan motor.
LUBRICATION
Fan Motor Bearings — OiUng holes are provided at each end
of condenser fan motor. Remove 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. When oil is lost, see
Table 9 for oil recharge and Carrier Standard Service
Techniques Manual, Chapter 1, page 1-21, for instructions.
Use Carrier PP33-1, Texaco Capella B or Suniso 3G oil.
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