GEA Bock HGX34P 2 pole - Manual (Page 12)

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4| Compressor assembly
4.4 Pipe connections
The pipe connections have graduated inside diameters so that pipes
with standart millimetre and inch dimensions can be used.
The connection diameters of the shut-off valves are rated for maximum
compressor output. The actual required pipe cross section must be
matched to the output. The same applies for non-return valves.
Fig. 15: graduated
internal diameter
4.5 Pipes
4.6 Laying suction and pressure lines
A rule of thumb: Always lay the first pipe section starting from the shut-off valve downwards
and parallel to the drive shaft.
ATTENTION Improperly installed pipes can cause cracks and tears, the result
being a loss of refrigerant.
INFO Proper layout of the suction and discharge lines directly after
the compressor is integral to the system’s smooth running and
vibration behaviour.
Rigid
fixed point
As short as
possible
Fig. 16
ATTENTION Damage possible.
Do not solder as long as the compressor is under pressure.
Superheating can damage the valve.
Remove the pipe supports therefore from the valve for soldering
and accordingly cool the valve body during and after soldering.
Only solder using inert gas to inhibit oxidation products (scale).
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.