Carrier 50EH 1100 Скачать руководство пользователя страница 29

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Caution: Do not work on any electrical components
without ﬁ rst turning oﬀ the main door switch in the
electric panel.

14 - MAINTENANCE

The minimal maintenance operations and their periodicity
will be made in accordance with national regulations.

All work on the unit’s electrical or refrigerant systems must
be carried out by a qualiﬁ ed authorised technician. See the
standard EN 378-4.

It is advisable to sign a maintenance contract with the installer
or an approved maintenance company.

14.1 General recommendations

Safety instructions

● Technicians working on the unit must wear the necessary

safety gear (e.g. gloves, eye protection, insulating clothing,
safety shoes).

● Similarly, it is recommended that personnel working close

to sources of high noise emission wear ear defenders. The
ear defenders should in no way impede the wearing of other
protective equipment.

● The surfaces of the compressor and pipes may reach

temperatures of over 100°C and cause burns if touched.
Likewise, the surfaces of the compressor may in some cases
drop to freezing temperatures which can cause frostbite. It is
therefore important to take special care when carrying out
maintenance work.

● Do not climb on the machine; use a platform to work at the

necessary height.

● Do not climb on the copper refrigerant pipes.

Preliminary advise

● Keep the unit clean.

● To avoid accidents and ensure proper ventilation of the coil,

keep the unit and the space around it clean and clear of clutter.

● Check the fouling level of the coil.

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 dryer.

● 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:

Refrigerant

Only qualiﬁ ed personnel must perform a periodic leak testing, in
accordance with the regulation (EC)

No. 517/2014.

● The frequency of checks is no longer related to the refrigerant

charge but to its global warming potential:

Charge kg x GWP = t CO2e

Carbon dioxide equivalency (t CO2e) is a quantity that
describes, for a given mixture and amount of greenhouse
gas, the amount in tonnes of CO2 that would have the same
global warming potential (GWP).

The number of tonnes of CO2 equivalent (t CO2e) can be
consulted in the following table:

● Operators shall ensure that the unit is checked for leaks ad

minima according to the following frequency:
•  t CO2e < 5 ......... not subjected
•  t CO2e 5 to 50 ... every year
•  t CO2e 50 to 500  every 6 months
•  t CO2e > 500 ...... every 3 months

● Where a leakage detection system has been installed the

frequency of checks is halved.

Note: These machines use R410A. It is essential that technicians
use equipment which is compatible with R410A with a working
pressure which is approximately 1.5 times higher than that of
units using R407C.

● Always remember that refrigeration systems contain

pressurised liquids and vapours. All necessary provisions
must be made when the system is partially opened: ensure
the part of the circuit concerned is not pressurised.

● Partial opening of the primary refrigerating circuit will

cause  a  certain  quantity  of  refrigerant  to  be  released  into
the  atmosphere.  It  is  essential  to  keep  the  amount  of  lost
refrigerant  as  low  as  possible  by  pumping  the  charge  and
isolating it in another part of the system.

50EN/EH 415 420 480 485 540 600 650 720 840 960 1100 1200

Charge

(kg)

2 x

17,0

2 x

17,0

2 x

14,5

2 x

17,0

2 x