GEA Bock HGX46 CO2 T - Manual (Page 17)

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5| Electrical connection
5 Electrical connection
INFO Connect the compressor motor in accordance with the circuit diagram
(see inside of terminal box).
Use suitable cable entry point of the correct protection type (see
name plate) for routing cables into the terminal box. Insert the strain
reliefs and prevent chafe marks on the cables.
Compare the voltage and frequency values with the data for the
mains power supply.
Only connect the motor if these values are the same.
DANGER Risk of electric shock! High voltage!
Only carry out work when the electrical system is disconnected
from the power supply!
4| Compressor assembly
To ensure the oil return function will work reliably no matter what kind of system configura-
tion you are using, GEA Bock recommends incorporating oil separators or oil level monitoring
equipment. The "O" connection is already available from the factory for the purpose of instal-
ling the additional oil level monitoring component. Oil should be returned from the oil separator to
the compressor via the "D1" connection provided for this purpose on the compressor.
4.11 Oil return
5.1 Information for contactor and motor contactor selection
All protection equipment, switching and monitoring devices must comply with the local safety
regulations and established specifications (e.g. VDE) and regulations as well as the manufacturer’s
specifications.
Motor protection switch is required! Motor contactors, feed lines, fuses and motor
protection switches must be rated on the basis of the maximum working current (see name plate). For
motor protection use a current-dependent and time-delayed overload protection device for monitoring
all three phases. Set the overload protection device so that it must be actuated within 2 hours, if there
is 1.2 times the max. working current.