Thermo King 098916, Руководство по обслуживанию

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Refrigeration Maintenance
141
Heat Saves Time
The application of heat to the system is a useful
and practical time saver. Increasing the
temperature of the compressor oil and refrigerant
will speed up the vaporization of any water
present in the system.
Heat lamps, electric heaters, or fans can be
applied to the compressor crankcase and other
parts of the system to increase the temperature of
the refrigerant and compressor oil.
Charging the System with
Refrigerant
Unit Charging by weight (from an
Evacuated Condition)
1. Close valve V4.
2. Open the gas ballast valve (located on top of
the pump housing behind the handle).
3. Stop the vacuum pump.
4. Mid-seat the discharge valve.
5. Connect the refrigerant tank with gauge
manifold to the evacuation station (see
“Evacuation Station and Unit Hookup” in this
chapter).
6. Weigh the tank of refrigerant.
7. Check the unit data plate for the required
weight of refrigerant charge. Subtract the
amount of the charge to be input to your unit
from the total weight of the tank of refrigerant.
This provides final tank weight after the unit
receives a full system refrigerant charge.
8. Set the refrigerant tank for liquid removal.
Open the hand valve on the tank.
9. Turn the unit off.
10. Open the gauge manifold hand valve and
charge liquid refrigerant into the system.
11. Close the refrigerant tank hand valve when the
correct amount (by weight) of refrigerant has
been added or if the system will take no more
liquid. The unit is now ready to have the
evacuation station removed.
Evacuation Station Removal
Remove the Evacuation Station by performing the
following steps:
1. Back seat the discharge service valves.
2. Close the high pressure hand valve on the
gauge manifold.
3. Close the refrigerant tank hand valve.
4. Open the hand valve at the gauge manifold
and read suction pressure.
5. Operate the unit in Cool mode until the
suction pressure decreases below 385 kPa,
3.85 bar, 50 psig.
6. Back seat the suction line access service
valve.
7. Stop the unit.
8. Remove the hoses from the suction and
discharge line access service valves.
9. Start the unit and perform a controller pretrip
test to verify correct refrigerant charge and
unit operation.
WARNING: Never use a torch or other
concentrated heat source to heat the
compressor or other refrigeration system
component.