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Refrigeration Maintenance
10-32
Installation
1. Clean the tubes for soldering.
2. Place the coil in the unit and install the mounting hardware.
3. Solder the hot gas inlet and liquid outlet refrigerant line connections.
IMPORTANT: Micro-channel coils are made of aluminum but have copper stub tubes at the inlet and outlet connections.
Make sure to use a heat sink on the copper stub tubes to prevent damage to the brazed connections (and the aluminum) that
attached the copper stub tubes to the aluminum micro-channel coil.
4. Pressurize the system and test for refrigerant leaks.
5. If no leaks are found, replace the liquid line drier then evacuate the system.
6. Connect the coolant hoses to the radiator and refill the engine cooling system with the 50/50 antifreeze/water solution.
7. Recharge the unit with the proper refrigerant and check the compressor oil.
8. Reinstall the top cap/grille.
9. Bleed the cooling system.
DEHYDRATOR (FILTER-DRIER) REPLACEMENT
Removal
1. Pump down the low side and equalize the pressure to slightly positive. Make sure to front seat the suction service valve to
isolate the low side and use the suction access port to access the low side.
2. Disconnect the nuts at the end of the drier.
3. Loosen the mounting hardware and remove the drier.
Installation
1. Place the new O-rings in the ORS fittings on the ends of the drier.
2. Install the new drier and tighten the mounting hardware.
3. Install and tighten the ORS nuts. Hold the drier with a back-up wrench on the hex behind the ORS fitting.
4. Pressurize the low side and check for leaks.
5. If no leaks are found, evacuate the low side.
6. Open the refrigeration valves and place the unit in operation.
DISCHARGE PRESSURE REGULATOR (DPR) TEST
1. Attach a gauge manifold to the suction service valve and the discharge service port. A low loss fitting must be used on the
hose connected to the discharge service port.
2. Operate the unit with all zones in high speed heat until the system pressures stabilize.
3. Check the discharge pressure on the gauge attached to the discharge service port. It should be within the range shown for the
DPR setting in the “Specifications” chapter. If the setting is incorrect, remove the protective cap and try to adjust the DPR to
the correct setting before assuming it is faulty.
4. Remove the gauges to return the unit to normal operation.
DISCHARGE PRESSURE REGULATOR (DPR) REPLACEMENT
Removal
1. Recover the refrigerant charge.
2. Remove the mounting clamp from the DPR.
3. Unsolder and remove the DPR. Note the position of the DPR so the new one will be placed in the same position.
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 ...