Refrigeration Maintenance
10-25
5. The net oil pressure should be at least 20 psi (138 kPa). If the net oil pressure is low, first check the compressor oil level, then
check the compressor oil pump and relief valve.
PRIMING NEW COMPRESSOR INSTALLATIONS
Thermo King remanufactured compressors have had a special break in process to assure that the oil pump is primed,
functioning, and broken in. The following procedure is recommended, but not required for factory-remanufactured compressors.
This procedure must be followed to prevent premature pump failure in any compressor that has had an oil pump installed,
especially a compressor that has been stored for any length of time. After installing the compressor use the following procedure.
1. Attach a suitable oil pressure gauge to the oil pressure access port on the compressor oil filter.
2. Attach the low pressure gauge of a gauge manifold to the suction service. This allows you to monitor the suction pressure in
the compressor after the electronic throttling valve (ETV) or suction pressure regulator (SPR).
3. Disconnect the wires to the fuel solenoid.
NOTE: The microprocessor will probably record some alarm codes because the fuel solenoid is disconnected and the
engine does not start. Clear these alarm codes as necessary.
4. Turn the unit on and let the engine crank. Do not crank the engine for more than 30 seconds.
a.
Note the pressure at the oil pressure access port and the suction service valve while the engine is cranking. Subtract the
suction pressure from the pressure at the oil pressure access port to get the net oil pressure.
b. If the compressor does not develop at least 10 psi (96 kPa) of net oil pressure in the first 30 seconds, allow the starter to
cool for a few minutes and the crank the engine again for 30 seconds. If 10 psi (96 kPa) of net oil pressure still does not
develop, first check the compressor oil level, then check the compressor oil pump and relief valve.
5. As soon as the compressor develops 10 psi (96 kPa) of net oil pressure, re-connected the fuel solenoid wires.
6. Start unit and run the engine on low speed for at least five minutes. If the net oil pressure is above 20 psi (138 kPa) for this
period, stop the unit.
7. Run the engine on high speed for at least five more minutes. The compressor oil pump is now primed and broken in.
TKO SCROLL COMPRESSOR (UT-SERIES)
NOTE: The TKO scroll compressor oil charge and oil filter (internal) should be changed when there has been a major oil or
refrigerant leak.
If the total refrigerant charge is lost due to a leak, or if a major component in the refrigeration system is changed; the compressor
shaft seal, compressor oil and oil filter should be changed.
Removal
1. Return as much compressor oil as possible to the compressor. See “Checking Compressor Oil” in the Refrigeration
Maintenance chapter.
2. Remove the refrigerant charge.
3. Loosen and remove the compressor/electric motor belt from the compressor pulley.
4. Unsolder the discharge line and unbolt the suction valve from the compressor.
5. Unsolder the liquid injection line from compressor.
6. Remove the compressor mounting bolts.
7. Lift the compressor out of the unit. Keep the compressor ports covered to prevent dust, dirt, etc., from falling into the
compressor.
NOTE: When the compressor is removed from the unit, the oil removed from the compressor should be measured. Then the
same amount of oil can be added before placing the replacement compressor in the unit.
CAUTION: The TKO scroll compressor requires R-404A/R-452A and polyol ester oil, TK P/N 203-433. Do NOT mix or
interchange polyol ester oil P/N 203-433 with other polyol ester oils.
Pressure at Oil Pressure Access Port
– Suction Pressure
= Net Oil Pressure
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 ...