Compressor And Refrigeration System Requirements; General Operation Requirements; Commissioning; Checking Pressure Strength - Bitzer CSH6553-35Y Operating Instructions Manual

3.2.1 Compressor and refrigeration system
requirements
The specifications are established in standards (e.g.
EN378). In view of the high requirements and product
liability, it is generally recommended to carry out the
risk assessment in cooperation with a notified body.
Depending on the design and the refrigerant charge, an
assessment according to EU Framework Directives
2014/34/EU and 1999/92/EC (ATEX 137) may be ne-
cessary.
DANGER
Fire hazard in the event of refrigerant leakage
and in the presence of an ignition source!
Avoid open fire and ignition sources in the en-
gine room and in the hazardous zone!
▶ Pay attention to the ignition point in air of the refri-
gerant used, see also EN378-1.
▶ Vent engine room according to EN378 or install an
extraction device.
▶ To open the pipelines, use only pipe cutters and no
open flame!
▶ Install components from which refrigerant may leak
(e.g. low and high pressure limiter or low and high
pressure cut-out) only outside the switch cabinet!
If the following safety regulations and adaptations are
observed, the standard compressors can be run with
refrigerants mentioned above of the A2L safety group.
• Observe the max. refrigerant charge according to the
installation place and the installation zone! See
EN378-1 and local regulations.
• No operation in the vacuum range! Install safety
devices for protection against insufficient and ex-
cessive pressure and make sure that they are de-
signed in accordance with the requirements of the
safety regulations (e.g. EN378-2).
• Avoid air penetration in the system – also during and
after maintenance work!
3.2.2

General operation requirements

Operation of the system and personal protection are
usually subject to national regulations on product
safety, operational reliability and accident prevention.
This requires separate agreements to be made
between the system manufacturer and the end user.
Implementation of the required risk assessment for in-
stallation and operation of the system is the responsibil-
ity of the end user. To this end, cooperation with a noti-
fied body is recommended.
46
To open the pipes, use only pipe cutters; do not use an
open flame.
When using flammable refrigerants of the A2L safety
group, additions, modifications and repairs of electrics
are only possible to a limited extent.

4 Commissioning

The compressor has been carefully dried, checked for
tightness and filled with a holding charge (N
leaving the factory.
DANGER
Risk of explosion!
Never pressurize the compressor with oxygen
(O ) or other industrial gases!
2
WARNING
Risk of bursting!
A critical shift of the refrigerant ignition limit is
possible in case of excess pressure.
Do not add a refrigerant (e.g. as a leak indic-
ator) to the test gas (N
Environmental pollution in case of leakage and
when deflating!
NOTICE
!
!
Risk of oil oxidation!
Check the entire system for strength pressure
and tightness, preferably using dried nitrogen
(N ).
2
When using dried air: Remove the compressor
from the circuit – make sure to keep the shut-off
valves closed.

4.1 Checking pressure strength

Check the refrigerant circuit (assembly) according to
EN378-2 (or other applicable equivalent safety stand-
ards). The compressor had been already tested in the
factory for strength pressure. A tightness test is there-
fore sufficient, see chapter Checking tightness, page
47. If you still wish to perform a strength pressure test
for the entire assembly:
) before
2
or air).
2
SB-170-10