Thermo King T-1080S, Руководство по обслуживанию

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Refrigeration Service Procedures
142
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 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.
Installation
1. Clean the tubes for soldering.
2. Place the new DPR in the same position from
which the old one was removed.
3. Use a heat sink or wrap the DPR with a wet
rag to prevent damage and solder the tubing
connections.
4. Install the mounting clamp on the DPR.
5. Pressurize the system and test for refrigerant
leaks.
6. If no leaks are found, replace the liquid line
drier then evacuate the system.
7. Recharge the unit with the proper refrigerant
and check the compressor oil.
8. Run the unit and test the DPR. Adjust the
setting if necessary.