Carrier 50EN 415 Installation, Operation And Maintenance Instructions page 31

14 - MAINTENANCE
Compressor
In the case of compressor replacement:
● Disconnect the unit from power supply.
● Completely empty the refrigerant charge using a specifi c
recovery unit for R-410A
● Disconnect electrically the compressor.
● Carefully unsolder the suction and discharge piping.
● The compressor is fi xed onto the platform with 4 screws.
● Unscrew the fi xings.
● Place the new compressor and check that it has a suffi cient
oil charge.
Warning: when tightening the compressor screws, please
consult the maximum torque that can be applied.
If a torque wrench is not available,tighten them until they are
snug then tighten a further ¾ turn.
● Solder the suction and discharge piping.
● Connect the compressor in accordance with the wiring
diagram.
● Make vacuum and next, reload the gas into the unit according
to charge data provided in the table of paragraph 14.1
"General recommendations" and in the unit's data plate.
Active recovery (optional)
● A cooling recovery circuit is optionally available for these units
(MRC0 and MRC1 assemblies). It is a complete circuit with
independent electronic control.
● The same recommendations for the maintenance of the
components of the main circuits must be followed for the
components of this circuit.
Recovery
circuit
compressor
Refrigerant leak detector (optional)
Maintenance:
● Annual testing: it is necessary
to carry out testing every year to
comply with the EN378 and F-GAS
regulations.
● Every 3 years: a taring test is
recommended.
● Every 5/6 years: it is recommended that the gas detection
element be replaced and calibration performed.
Note: Check the documentation attached to the leak detector
for taring and calibration testing.
Dryer fi lter
● The fi lter function is the preserve the cooling circuit clean and
without humidity, neutralizing the acids that can be found in
the cooling circuit.
● Measure the diff erence in the temperature of the pipes at the
dryer inlet and outlet.
● If necessary, replace.
Compressor
Filter drier
Particle
separator
Mixing boxes and free-cooling (optional)
In units with mixing box assemblies with motorised dampers it
is advisable to check the condition of the servomotors.
● Assemblies with 2 dampers-> 1 servo
● Assemblies with 3 dampers -> 2 servos
Note: The available
assemblies can be
consulted in chapter 3.
Damper locked
with the mixing
damper
Motorised
dampers
Servomotors
Air fi lters in the grids of the electric panel
● The appearance of the fi lters located
inside of the grids must be examined
periodically, because the clogged
fi lters impede good ventilation.
● C l e a n i n g c a n b e d o n e w i t h a
household vacuum cleaner. Replace
them regularly.
115 x 115 mm G2 fi lters.
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