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INSTALLATION AND PREPARATION FOR USE
PREPARATIONS FOR USE
1.4
PREPARATIONS FOR USE
After the Compressor (Package) has been installed (excluding final connection of
drive device), the following actions should be followed in the order given:
1.4.1
Leak test of compressor and system
The compressor (package) has been pressure tested prior to leaving the factory.
In case an additional leak test is required, this test is should be carried out with
dry nitrogen.
A system leak test should be carried out over 24 hours to ensure that the system
is tightly sealed.
Record during the pressure test, the pressure, ambient temperature and outside
temperature. During the initial 6 hours a pressure drop of 2% is permissable. With
respect to temperature variations, no further pressure loss should be detected in
the remaining 18 hours.
1.4.2
EVACUATION/DRYING THE REFRIGERATING SYSTEM
For evacuation of compressor only, refer to Section 2.5, Page 34
Procedure to evacuate and to dry a system:
i.
ii.
iii.
iv.
v.
vi.
vii.
1.4.3
Initial oil charge
24
Hint!
DO NOT add oil to the compressor prior to pressure testing
STATUS: System is filled with nitrogen and no oil has been added (oil
prevents any trapped moisture from boiling off).
Verify that all valves in that part of the system to be evacuated are opened
(refer also to the plant manual).
Connect vacuum pump to the evacuation/purging valve(s) of the compressor
(for location of these valves refer to the "Product Information" or to a
connection as mentioned in the plant manual and evacuate the system to
approx. 6 mBar.
Break vacuum by charging dry nitrogen into the system.
Repeat step iii, "Connect vacuum pump ...".
Wait approx. 24 hours.
If pressure has increased (system still contains moisture), repeat steps iv, and
vi. Otherwise, continue with the "Initial oil charge" procedure.
P-NL-094_imm_VHS_English_13
26.07.2021
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