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Refrigeration Maintenance
10-24
Use the following procedure to change the compressor oil filter.
1. Pump down the low side and equalize the pressure to slightly positive.
2. Front seat the discharge and suction service valves.
3. Disconnect the oil lines from the compressor oil filter. Hold the oil filter with back-up wrench on the hex behind the ORS
fitting.
4. Remove the clamp and the compressor oil filter.
5. Coat the new O-rings with clean compressor oil and place them in the ORS fittings on the ends of the new compressor oil
filter.
6. Fasten the new compressor oil filter in place with the clamp.
7. Attach and tighten the oil lines to the compressor oil filter. Hold the oil filter with a back-up wrench on the hex behind the
ORS fitting.
8. Evacuate the compressor and filter to remove trapped air.
9. Open the service valves, operate the system, and check the compressor oil filter for leaks.
CHECKING COMPRESSOR OIL PRESSURE
The oil pressure at the oil pressure access port varies with the suction pressure in the compressor. Therefore, we need to
calculate the “net oil pressure” to determine the actual compressor oil pressure. The net oil pressure is the pressure at the oil
pressure access port minus the suction pressure after the electronic throttling valve (ETV) or suction pressure regulator (SPR).
This is measured at the suction service valve. Use the following procedure to check the compressor oil pressure.
1. Attach a gauge manifold to the suction service valve and discharge service valve.
2. Attach a suitable oil pressure gauge to the oil pressure access port on the compressor oil filter.
3. Start the unit and note the pressure at the oil pressure access port and the suction pressure at the suction service valve.
4. Subtract the suction pressure from the pressure at the oil pressure access port to get the net oil pressure.
1.
Oil Pressure Access Port
2.
Inlet Fitting
3.
Outlet Fitting
Compressor Oil Filter
2
1
3
Summary of Contents for T-1000R
Page 14: ...Safety Precautions 2 6 Warning Decals 2e24151g0 ...
Page 34: ...Maintenance Inspection Schedule 4 10 ...
Page 57: ...Unit Description 5 23 Purge Mode UT Series 1 3 4 5 2 ...
Page 67: ...Unit Description 5 33 Zone 1 Cool and Zone 2 Cool UT SPECTRUM Units ...
Page 69: ...Unit Description 5 35 Purge Mode UT SPECTRUM Units ...
Page 71: ...Unit Description 5 37 Zone 1 Cool and Zone 2 Heat UT SPECTRUM Units ...
Page 72: ...Unit Description 5 38 ...
Page 74: ...Diesel Electric Menu 6 28 Adjust Brightness 6 29 Time 6 30 ...
Page 120: ...Operating Instructions Standard HMI 7 18 ...
Page 152: ...Engine Maintenance 9 14 T Series Fuel and Oil System Components TK 376 ...
Page 154: ...Engine Maintenance 9 16 T Series Fuel and Oil System Components TK 270 ...
Page 156: ...Engine Maintenance 9 18 UT Series Fuel System Components AMA768 ...
Page 172: ...Engine Maintenance 9 34 T Series Engine Mounting Components for 2 Cylinder Engine ...
Page 184: ...Engine Maintenance 9 46 ...
Page 238: ...Refrigeration Maintenance 10 54 ...
Page 246: ...Clutch Maintenance 11 8 ...
Page 258: ...Structural Maintenance 12 12 ...
Page 264: ...Mechanical Diagnosis 13 6 ...
Page 265: ...14 Electric Standby Diagnosis ...
Page 268: ...Electric Standby Diagnosis 14 4 ...
Page 269: ...15 Refrigeration System Diagnosis ...
Page 272: ...Refrigeration System Diagnosis 15 4 ...
Page 280: ...Remote Evaporators 16 8 ...