Maintenance; General Recommendations - Carrier 50FF/FC 020-093 Installation, Operation And Maintenance Instructions

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

14.1.1 - 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.
Caution: Do not work on any electrical components
without fi rst turning off the main door switch in the
electrical cabinet.
14.1.2 - 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.
14.1.3 - 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:
50FF 020 028
Volume (l) C1: 2,5 C1: 2,5
50FC 020 028
Volume (l) C1: 2,5 C1: 2,5
50FF 052 058
Volume (l) C1: 3,6 C1: 5,0 C1: 5,0 C1: 5,0 C1: 6,5 C1: 6,8 C1: 6,8
50FC 052 058
C1: 2,5 C1: 2,5
Volume (l)
C2: 2,5 C2: 2,5
14.1.4 - 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:
Main circuits:
50FF 020 028
Charge
C1: 7,3 C1: 7,6
(kg)
Environ.
impact 15,2 15,9
(t CO2e)
50FC 020 028
Charge
C1: 8,0 C1: 8,3
(kg)
Environ.
impact 16,7 17,3
(t CO2e)
50FF 052 058
Charge
C1: 9,7 C1: 9,7 C1: 10,0 C1: 17,0 C1: 17,5 C1: 17,5 C1: 18,0
(kg)
Environ.
impact 20,3 20,3
(t CO2e)
50FC 052 058
Charge C1: 6,3 C1: 6,4 C1: 6,5
(kg) C2: 6,3 C2: 6,4 C2: 6,5
Environ.
impact 26,1 26,7
(t CO2e)
037 040 045
C1: 3,3 C1: 3,5 C1: 3,5
037 040 045
C1: 3,3 C1: 3,5 C1: 3,5
062 070 074 086
062 070 074 086
C1: 2,5 C1: 3,3 C1: 3,3 C1: 3,5
C2: 3,3 C2: 3,3 C2: 3,5 C2: 3,5
037 040 045
C1:
C1: 9,7 C1: 9,7
10,0
20,3 20,3 20,9
037 040 045
C1: 11,0 C1: 11,0 C1: 11,3 C1: 11,6
23,0 23,0 23,6
062 070 074 086
20,9 35,5 36,5 36,5
062 070 074 086
C1: 10,0 C1: 10,2 C1: 10,2
C2: 10,0 C2: 10,2 C2: 10,2
27,1 41,8 42,4 42,4
047
C1: 3,5
047
C1: 3,5
093
093
C1: 3,5
C2: 3,5
047
C1:
10,3
21,5
047
24,2
093
37,6
093
C1: 10,3
C2: 10,3
42,8
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