19
SILVER M
INSTALLATION
– OPERATING - MAINTENANCE
5.8.
Cooling system
General
Because the cooling components in the RAC equipment have very
differing designs, it is not possible in this context to provide a
detailed description of the work related to commissioning, service
and maintenance. The individual operating instructions must be
observed.
Bodily contact with refrigerant must be avoided, as freezing of the
skin and limbs or damage to the eye retina can result. Equipment
for personal protection against the effects of refrigerant must be
used in accordance with regulations comparable to German VBG 20
(protective glasses, gloves, etc.)!
Modifications to the system may be carried out only by authorised
specialist personnel.
The loose filter dryer included in the delivery may be opened only by
the cooling system commissioning personnel and it must be
installed immediately, as air humidity can damage the filter dryer.
Commissioning
Maintenance
Depending on the operating mode and filling quantity, maintenance
should be carried out under a maintenance contract at least once a
year by a qualified specialist refrigeration company in accordance
with VDMA 24186, and in accordance with F-Gas Regulation (EU)
517/2014, preferably before the start of the cooling period. In
addition to the service and inspection work, further information
from the component manufacturer must also be observed.
According to the F-Gas Regulation (EU) 517/2014, the prescribed
intervals for leak tests depend on the type of refrigerant and the
refrigerant filling quantity.
The system filling quantity is converted to a CO
2
equivalent:
Refrigerant filling quantity (t) * GWP = CO
2
equivalent of the system
GlobalWarmingPotential:
R134a = 1.430 t/kg
R407c = 1.774 t/kg
CO
2
equivalent
Frequency of control checks
from 5 t
annually
from 50 t
semi-annually
from 500 t
quarterly
Commissioning may be carried out only by a qualified cooling and
refrigeration specialist company.
Inspection work
The checks or work tasks listed below can be carried out by the
operator.
-
Clean lamella-fin surfaces in order to avoid excessive
condensation pressures. Contaminated surfaces lead to
performance loss. Do not damage piping or lamella-fins.
-
Check the compressor oil level. The oil should cover at least
half of the viewing glass with the compressor switched off
-
Check and clean condensation drain. Be aware of unusual
odours or operating conditions.
