Pipe Connections; Pipes; Operating The Shut-Off Valves - Danfoss BOCK FK20 Operating Manual

4| Compressor assembly

4.6 Pipe connections

Fig. 8: Stepped
internal diameters
ATTENTION! Overheating can damage the valve.

4.7 Pipes

Pipes and system components must be clean and dry inside and free of scale, swarf and layers
of rust and phosphate. Only use air-tight parts.
Lay pipes correctly. Suitable vibration compensators must be provided to prevent pipes being
cracked and broken by severe vibrations.
Ensure a proper oil return.
Keep pressure losses to an absolute minimum.

4.8 Operating the shut-off valves

Before opening or closing the shut-off valve, release the valve spindle seal by approx. ¼ of a turn
counter-clockwise.
After activating the shut-off valve, re-tighten the adjustable valve spindle seal clockwise.
Valve spindle seal
Fig. 9
© Danfoss | Climate Solutions | 2023.07
The pipe connections, if installed, have graduated inside diameters so
that pipes in the common millimeter and inch dimensions can be used.
The connection diameters of the shut-off valves are designed for
maximum compressor output. The required pipe cross-section must
be matched to the capacity. The same applies for non-return
valves.
Solder only using inert gas to inhibit oxidation products.
Release
Tighten
Fig. 10
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