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Refrigeration Maintenance
10-22
ACCUMULATOR REPLACEMENT
Removal
1. Pump down the low side and equalize the pressure to slightly positive.
2. Unsolder the inlet and outlet refrigerant suction lines from the accumulator tank. Make sure to use a heat sink on the SPR on
units so equipped.
3. Unbolt and remove the accumulator from the unit.
Installation
1. Place the accumulator in the unit and tighten the mounting bolts.
2. Reconnect (solder) the refrigerant line coming from the purge check valve.
3. Solder the inlet and outlet suction lines to the accumulator tank. Make sure to use a heat sink on the SPR.
4. Pressurize the low side and check for leaks.
5. If no leaks are found, replace the liquid line drier then evacuate the low side.
6. Open the refrigeration valves and place the unit in operation. Check the refrigerant charge and the compressor oil. Add as
required.
COMPRESSOR TEST
1. Attach a gauge manifold to the suction service valve and the discharge service valve.
2. Run the unit in high speed cool until the system pressures stabilize.
3. Cover the condenser to raise the discharge pressure to 300 to 350 psig (2068 to 2413 kPa).
4. Keep the condenser covered and pump down the low side by front seating the receiver tank outlet valve. When the low side
pumps down to a 10 in. Hg vacuum (-34 kPa), check the discharge pressure. It should be 200 to 250 psig (1379 to 1724 kPa)
or higher. The compressor is probably faulty if the discharge pressure is below 200 psig (1379 kPa).
NOTE: If the low side will not pump down into a vacuum, the hot gas solenoid, or the receiver tank pressure check valve
may be stuck open. See the individual component tests for more information.
1.
Mechanical Throttling Valve
11.
High Pressure Cutout Switch (HPCO)
2.
Suction Service Valve
12.
Condenser Check Valve
3.
Compressor
13.
Liquid Injection Solenoid (LIS)
4.
Purge Check Valve (PCV)
14.
Receiver Tank Sight Glass
5.
Hot Gas Bypass Solenoid (HGBS)
15.
High Pressure Relief Valve
6.
Receiver Tank Pressure Solenoid (RTPS)
16.
Receiver Tank
7.
Discharge Pressure Regulator (DPR)
17.
Receiver Tank Outlet Valve
8.
Discharge Service Port
18.
Accumulator
9.
Condenser/Radiator Coil
19.
Purge Valve (PV)
10.
Condenser Inlet Solenoid (CIS)
Legend for “Condenser Refrigeration Component Locations UT-Series” on page 10-21
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 ...