Commissioning; Checking Pressure Strength; Checking Tightness; Evacuation - Bitzer ORBIT 6 Operating Instructions Manual

Fig. 9: ORBIT 6 oil heater
Fig. 10: ORBIT 8 oil heater

6 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!
ESB-130-8
) before
2
or air).
2
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.

6.1 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
35. If you still wish to perform a strength pressure test
for the entire assembly:
DANGER
Risk of bursting due to excessive pressure!
The pressure applied during the test must never
exceed the maximum permitted values!
Test pressure: 1.1-fold of the maximum allow-
able pressure (see name plate). Make a distinc-
tion between the high-pressure and low-pres-
sure sides!

6.2 Checking tightness

Check the refrigerant circuit (assembly) for tightness,
as a whole or in parts, according to EN378-2 (or other
applicable equivalent safety standards). For this, create
an excess pressure, preferably using dried nitrogen.
Observe test pressures and safety reference, see
chapter Checking pressure strength, page 35.

6.3 Evacuation

▶ Open shut-off valves and solenoid valves.
▶ Use a vacuum pump to evacuate the entire system,
including the compressor, on the suction side and
the high-pressure side.
➙ With the vacuum pump shut off, a "standing vacuum"
lower than 1.5 mbar must be maintained.
▶ Repeat the operation several times if necessary.
NOTICE
!
!
Risk of damage to the motor and compressor!
Do not start the compressor while it is in a va-
cuum!
Do not apply any voltage, not even for testing!
35