11
Oil Charge (Tables 1A and 1B)
38AKS UNITS — Allow unit to run for about 20 minutes.
Stop unit and check compressor oil level. Add oil only if neces-
sary to bring oil into view in sight glass. Use only Carrier-
approved compressor oil.
Approved oils are:
Suniso 3GS
WF32-150
38AK UNITS — The 38AK units do not have a sight glass
and are factory charged with the correct amount of oil.
ALL UNITS — Do not reuse drained oil or use any oil that
has been exposed to atmosphere. Procedures for adding or re-
moving oil are given in Carrier Standard Service Techniques
Manual, Chapter 1, Refrigerants.
If oil is added, run unit for an additional 10 minutes. Stop
unit and check oil level. If level is still low, add oil only after
determining that piping system is designed for proper oil return
and that system is not leaking oil.
SERVICE
Cleaning — Inspect unit interior at the beginning of each
cooling season and as operating conditions require.
CONDENSER COIL — Inspect coil monthly. Clean con-
denser coil annually and as required by location or outdoor-air
conditions.
Clean coil as follows:
1. Turn off unit power and tag disconnect.
2. Remove and save top panel screws on condensing unit.
3. Remove condenser coil corner post. See Fig. 10. To hold
top panel open, place coil corner post between top panel
and side panel. See Fig. 11.
4. Remove bracket holding coil sections together at return
end of condenser coil. Carefully separate the outer coil
section 3 to 4 in. (75 to 100 mm) from the inner coil
section. See Fig. 12.
5. Use a water hose or other suitable equipment to flush
down between the 2 coil sections to remove dirt and
debris. Clean the outer surfaces with a stiff bristled brush
in the normal manner.
6. Reposition the coil section and secure.
7. Remove the coil corner post from between the top panel
and side panel.
8. Install the coil corner post and replace all screws removed
in Step 2.
Lubrication
COMPRESSORS — Each compressor is charged with correct
amount of oil at the factory. For additional information on
38AKS units, refer to the Oil Charge section above.
FAN MOTOR BEARINGS — Fan motor bearings are of the
permanently-lubricated type. No further lubrication is required.
Condenser-Fan Adjustment (Fig. 13)
1. Shut off unit power supply and tag disconnect.
2. Remove condenser-fan assembly (grille, motor, motor
cover, and fan).
3. Loosen fan hub setscrews.
4. Adjust fan height as shown in Fig. 13.
5. Tighten setscrews.
6. Replace condenser-fan assembly.
When servicing unit, shut off all electrical power to the unit
to avoid shock hazard or injury from rotating parts.
Fig. 11 — Propping Up Top Panel
Fig. 12 — Separating Coil Sections
Fig. 10 — Cleaning Condenser Coil