Servicing - Carrier 50FF/FC 020-093 Installation, Operation And Maintenance Instructions

14 - MAINTENANCE
Additional charge of the optional active dehumidifi cation:
Active dehumidification is equipped with an additional
condensation coil, in series with the main cooling circuit, to
reheat the air. In two-circuit units, the coil is incorporated in
circuit 2.
50FF 020 028
Charge
C1: 3,3 C1: 3,3
(kg)
Environ.
impact 6,9 6,9
(t CO2e)
50FC 020 028
Charge
C1: 4,9 C1: 4,9
(kg)
Environ.
impact 10,2 10,2
(t CO2e)
50FF 052 058
Charge
C1: 10,5 C1: 10,5C1: 10,5C1: 10,5C1: 10,5C1: 10,5C1: 10,5
(kg)
Environ.
impact 21,9 21,9
(t CO2e)
50FC 052 058
Charge
C2: 11,2 C2: 11,2 C2: 11,2 C2: 11,5 C2: 11,5 C2: 11,5 C2: 11,5
(kg)
Environ.
impact 23,4 23,4
(t CO2e)
Cooling recovery circuit:
50FF/
020 028
50FC
Charge
CR: 1,7 CR: 1,7
(kg)
Environ.
impact 3,5 3,5
(t CO2e)
50FF/
052 058
50FC
Charge
CR: 3,0 CR: 3,0 CR: 3,0 CR: 3,4 CR: 3,4 CR: 3,4 CR: 3,4
(kg)
Environ.
impact 6,3 6,3
(t CO2e)
■ 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
64
037 040 045
C1: 5,4 C1: 5,4 C1: 5,4
11,3 11,3 11,3
037 040 045
C1: 4,6 C1: 4,6 C1: 4,6
9,6 9,6 9,6
062 070 074 086
21,9 21,9 21,9 21,9
062 070 074 086
23,4 24,0 24,0 24,0
037 040 045
CR: 2,5 CR: 2,5 CR: 2,5
5,2 5,2 5,2
062 070 074 086
6,3 7,1 7,1 7,1
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.
■ The refrigerant and lubricating oil, and the low-temperature
liquid refrigerant in particular, may cause infl ammatory lesions
similar to burns if they come into contact with the skin or eyes.
047 Always wear protective eyewear, gloves and other protective
equipment when opening pipes or tanks liable to have liquids
C1: 5,4
in them.
■ Store unused refrigerant in the appropriate containers and limit
11,3
the amounts stored in mechanical rooms.
■ Cylinders and tanks of refrigerant must be handled with care
and signs warning users of the related poisoning, fi re and
047
explosion hazards must be clearly visible.
C1: 4,6
■ Refrigerant that reaches the end of its life must be collected and
recycled in accordance with applicable regulations.
9,6
093

14.2 - Servicing

21,9
It's recommended to note down the operating readings and perform
the following checks at least twice a year and mandatory after
each time a unit is started for seasonal use.
093
14.2.1 - Weekly checks
With the unit running at full capacity, check the following values:
24,0
■ LP compressor suction pressure and HP compressor discharge
pressure.
■ The oil level and its appearance. If the colour changes, check
the quality.
047
■ Also check whether the safety devices operate correctly.
■ Check the entire system for traces of water or oil under or
CR: 2,5
around the unit and for any unusual noises.
5,2
14.2.2 - Monthly checks
■ Check all the values listed in the table "Operating readings"
093
on chapter 13.
■ Check for corrosion on all metal surfaces (chassis, casing,
exchangers, electrical cabinet, etc.).
7,1
■ Make sure that the insulating foam is neither detached nor torn.
■ Check the coolants for any impurities which could cause wearor
corrosion in the exchanger.
■ Check the circuits for leaks.
■ Check whether the safety devices and the expansion valve(s)
operate correctly.
14.2.3 - Annual checks
■ Carry out the same inspections as during the monthly checks.
■ Carry out an oil contamination test (every year or every 5000
hours). If acid, water or metal particles are found, replace
the oil in the circuit concerned and the dryer. Follow the
recommendations of paragraph 14.1.
■ Check the electrical connections to ensure they are tight and
in good condition.
■ Check the condition of the contacts and the current at full load
on all three phases.
■ Check the electrical box for water seepage.
N.b.: The intervals for cleaning are given as a guide and should
be adapted to each unit.