GEA Bock HG66e Series, Assembly Instructions Manual

Page: 32 / 40

32
D
GB
F
E
I
Ru
96446-09.2020-DGbFEIRu
10 | Accessories
Special accessories are only pre-mounted in the factory if ordered specially by customer. Retrofitting
is possible in full compliance with the safety instructions and repair instructions enclosed with the kits.
Information about the use, operation, maintenance and servicing of the components is available in the
printed literature or on the internet under vap.bock.de.
ATTENTION Capacity-regulated operation alters the gas speeds and pressure
ratios of the refrigerating plant: Adjust the suction line routing and
dimensioning accordingly, do not set the control intervals too
close and do not let the system switch more than 12 times per
hour (refrigerating plant must have reached a state of equilibrium).
Continuous operation in the control stage is not recommended as
the gas velocity in the plant system under certain circumstances
does not guarantee sufficient oil return to the compressor with
activated capacity regulator.
We recommend switching to unregulated operation (100% capac -
ity) for at least 5 minutes per capacity-regulated operating hour.
An assured oil return can also be realised by a 100% capacity
requirement after each compressor restart.
Electrical actuation of the solenoid valve: Normally open, (corre -
sponds to 100 % compressor capacity).
WARNING Several capacity regulators cannot switch at the same time during
compressor operation! Otherwise the sudden change in load can
damage the compressor! Comply with the switching interval of 60 s.
• Comply with the switching sequence:
Switching on LR1 60s LR2
Switching off LR2 60s LR1
To prevent oil slugging:
The oil return from the oil separator must be guided back at the intended connection (D1) on the
compressor housing.
A direct oil return into the suction line from the oil separator is not permissible.
Ensure that the oil separator is properly dimensioned.
10.2 Oil separator
ATTENTION Oil slugging can result in damage to the compressor.