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4 | compressor assembly – GEA Bock HGX2 CO2 T User Manual

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4 | Compressor assembly

4.4 Flange shut-off valves (HP/LP)

ATTENTION! The compressor must be depressurised through connections A

and B before commencing any work and prior to connecting to the

refrigerant system

A

B

Fig. 11

Fig. 12

4.5 Operating mode of the lockable service connections

Pipe connection

Opening the shut-off valve:
Spindle: turn to the left (counter-clockwise) as far as it will go.
—> Shut-off valve completely opened / service connection closed.
The connection which cannot be shut off is intended for safety devices.

Opening the service connection
Spindle: Turn ½ - 1 turn to the right clockwise.
—> Service connection opened / shut-off valve opened.
The connection which cannot be shut off is intended for safety devices.

Spindle

Connection cannot
be shut off

Connection
blocked

Service connec-
tion closed

Pipe connection

Spindle

Connection cannot
be shut off

Connection
offen

Service connec-
tion opened

Fig. 13

Fig. 14

After activating the spindle, generally fit the spindle protection cap again and tighten with 14-16 Nm.
This serves as a second sealing feature during operation.