4-13
6. Backseat valve to remove hose from suction
service valve and replace service valve caps.
Gauge
Manifold
Compressor
Oil
Container
Suction
Service
Valve
Figure 4-11. Compressor Oil Charge Connections
4.20.4 Adding Oil to Service Replacement Compressor
CAUTION
The appropriate compressor oil must be used
according to the refrigerant used in the system.
(Refer to section 1.2.b.)
Service replacement compressors may or may not be
shipped with oil.
If compressor is without oil:
Add oil, (paragraph 4.20.2) through the suction
service valve flange cavity or by removing the oil fill plug.
1
2
3
4
5
6
7
8
9
10
1. High Pressure
Switch Connection
2. Low Pressure
Switch Connection
3. Suction Service
Valve
4. Oil Fill Plug
5. Bottom Plate
6. Oil Drain Plug
7. Oil Sight Glass
8. Oil Pump
9. Unloader Solenoid
10. Discharge Service
Valve
Figure 4-12. Compressor - Model O5G
a. To Remove Oil From the Compressor
1. If the oil level recorded in paragraph 4.20.2 is
above 1/2 of the sight glass, remove oil from the
compressor. If at a full sight glass, remove 2-3/4 pints of
oil from the compressor to lower the level to 1/2 of the
sight glass.
2. Connect manifold gauges to the compressor.
3. Close suction service valve (frontseat) and pump
unit down to 2 to 4 psig (1.4 to 2.8 kg/cm
@
). Frontseat
discharge service valve and slowly bleed remaining
refrigerant.
4. Remove the oil drain plug on the bottom plate of
the compressor and drain the proper amount of oil from
the compressor. Replace the plug securely back into the
compressor.
5. Repeat paragraph a.1. to ensure proper oil level.
NOTE
Before opening up any part of the system, a slight
positive pressure should be indicated on both
gauges.
If a vacuum is indicated, emit refrigerant
by cracking receiver outlet valve momentarily to
build up a slight positive pressure.