Thermo King CRR-40 119, Руководство пользователя

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Refrigeration Maintenance and Service Operations
141
5. Remove the three-phase electric power
connection.
6. Remove the compressor mounting tray bolts
and nuts.
7. Slide the compressor from the unit.
8. Keep the compressor ports covered to prevent
dust, dirt, etc., from falling into the
compressor.
NOTE: When the compressor is removed
from the unit, oil level should be noted or the
oil removed from the compressor should be
measured so that the same amount of oil can
be added before placing the new compressor
or repaired compressor in the unit.
Installation
1. Slide the compressor into the unit. Install
mounting bolts, washers and nuts, and tighten.
2. Bolt the discharge valve to the compressor
with a new gasket lightly coated with
compressor oil. Bolt the suction service valve
to the compressor using a new O-ring coated
with compressor oil.
3. Apply refrigerant locktite to the threads of the
switches. Install the switches. Connect the
wire connectors for the high pressure cutout
switch.
4. Connect liquid injection line to compressor
body.
5. Connect three-phase electric power to the
compressor.
6. Pressurize the compressor with refrigerant gas
(same gas as that used in the system). Check
for refrigerant leaks around the compressor
assembly and gasket connections.
7. If no leaks are found, recover the refrigerant
used for the leak test (see “Refrigerant
Recovery” in this chapter). Because this
refrigerant gas will contain some air, place it
in a contaminated refrigerant bottle to be
reclaimed later.
8. After all pressure is removed from the low
side and compressor, hook up your evacuation
equipment.
9. Evacuate the low side and compressor (see
“Evacuation and Cleanup of the Refrigeration
System” in this chapter).
10. Back seat the discharge service valve and
open the liquid line service valve fully.
11. Operate the unit at least thirty minutes and
then inspect the oil level in the compressor.
Add or remove oil if necessary.
12. Check the refrigerant charge and add
refrigerant if needed.
Condenser Coil Replacement
Removal
1. Recover the refrigerant charge from the unit
(do NOT vent refrigerant to the atmosphere).
2. Remove the condenser fan grille, condenser
fan blade and condenser fan shroud.
3. Remove the condenser coil support brackets
from the coil.
4. Unsolder the coil inlet and liquid line
connections.
5. Support the coil and unbolt the condenser coil
mounting brackets. Slide the coil from the
unit.
Installation
1. Clean the tubes for soldering.
2. Slide the coil into the unit and install the bolts
in the
mounting brackets.
3. Solder the inlet line and liquid line
connections.
NOTE: It is strongly recommended that dry
nitrogen be used to purge the system during
any solder operations (see “Using
Pressurized Nitrogen” in this chapter).
4. Pressurize the system and test for leaks (see
“Refrigerant Leak Test Procedure” in this
chapter).
5. If no leaks are found, recover the leak test gas
(see “Refrigerant Recovery” in this chapter).