36
15 - MAINTENANCE
Oil
Oils for refrigeration units do not pose any health risks if they
are used in compliance with the precautions for use:
● Avoid unnecessary handling of components lubricated with
oil. Use protective creams.
● Oils are fl ammable and must be stored and handled with care.
Disposable rags or cloths used in cleaning must be kept away
from open fl ames and disposed of in the appropriate manner.
● Containers must be stored with their caps on. Avoid using oil
from an opened container stored under incorrect conditions.
● Check the oil level and aspect. In case of a colour change,
check the oil quality using a contamination test.
● In the case of the presence of acid, water or metallic particles,
replace the aff ected circuit oil, as well as the fi lter drier.
● If all the oil must be emptied, replace it imperatively with new
oil of the same grade as the original oil which has been stored
in a hermetically sealed container until its time of use.
The oil type recommended for these units is:
Copeland 3MAF 32cST, Danfoss POE 160SZ, ICI Emkarate
RL 32CF, Mobil EAL Artic 22CC.
The following table indicates the required volume:
Compressor
In the case of compressor replacement:
● Disconnect the unit from the power supply.
● Completely drain the refrigerant charge using a specifi c
recovery machine for R-410A refrigerant.
Important: Always follow the recommendations given in
section 2.2 “Safety standards for refrigerant”.
● 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 sufficient oil
charge.
Warning: when tightening the compressor screws, please
consult the maximum torque that can be applied.
● Solder the suction and discharge piping.
● Connect the compressor in accordance with the wiring
diagram.
● Make a vacuum and next, reload the gas into the unit
according to charge data provided in the table of the section
“Refrigerant” and in the unit’s nameplate.
Level 3 maintenance
Maintenance at this level requires specifi c skills, qualifi cations,
tools, and expertise. Only the manufacturer or an authorized
agent are permitted to carry out this work.
This maintenance work relates to the following:
● Replacement of major components (compressor, coil
exchanger, etc).
● Operations on the refrigerant circuit (handling refrigerant).
● Modifi cation of factory-set parameters (changes on the "50FC"
control).
● Movement or disassembly of the refrigeration unit.
● Any operation due to proven lack of maintenance.
● Any operation covered by the warranty.
● One or two leak detection operations per year performed by
qualifi ed personnel using a certifi ed leak detector.
● To reduce waste, the refrigerant and the oil must be
transferred.
● In accordance with applicable regulations, using methods that
limit refrigerant leaks and pressure drops and with materials
that are suitable for the products.
● Any leaks detected must be repaired immediately.
● The compressor oil that is recovered during maintenance
contains refrigerant and must be treated accordingly.
● Pressurised refrigerant must not be vented to the open air.
● If the refrigerating circuit must be opened, cap all openings
for a period of up to one day. If open for longer, blanket the
circuit with a dry, inert gas (e.g., nitrogen).
15.3 Access to the main components
Before performing any work on the machine ensure
it is de-energized. Cut-off the main power supply
with the door switch located in the electrical cabinet
of the outdoor module.
Always ensure that the main power to the outdoor
module is turned-off before working on the indoor
module.
It is mandatory to use all required PPE for work at
height. Pay special attention to the indoor modules
fi xed to the ceiling.
50NC series 022 028 038 042 058
Volume (l) Coming soon 3,5 3,5 4,8
50NC series 064 074 086 106 490
Volume (l) 6,8 7,1 7,2 Coming soon
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