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© Danfoss | Climate Solutions | 2023.07
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Compressor assembly
Pipe connection
Pipe connection
4.7 Operating mode of the lockable service connections
Fig. 9
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.
Fig. 10
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.
Service connection
closed
Connection
blocked
Spindle
Connection cannot
be shut off
Connection cannot
be shut off
Service connection
opened
Spindle
Connection
open
Compressor
Compressor
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.
For systems with long pipes and higher degree of contamination, a filter on the suction-side is
recommended. The filter has to be be renewed depending on the degree of contamination (reduced
pressure loss).
Moisture in the refrigeration circuit can lead to crystal and hydrate formation. For this reason, we
recommend using a filter drier and a sight glass with a moisture indicator.
4.8 Suction pipe filter and filter drier
