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© Danfoss | Climate Solutions | 2023.06
AQ450438405295en-US0201 | 11
Material soldering / welding connection: S235 (JRG2C)
The
pipe connections
have graduated inside diameters so that pipes with
standard 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. 5: graduated
internal diameter
4.3 Connecting the pipelines - solder system
Damage possible.
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).
•
On its high-pressure side, the compressor has a shut-off valve with multi-sided cutting ring for safe
installation of the discharge line.
Cutting ring function after tightening the union nut
.
.
.
.
.
4.4 Connecting the pipelines - cutting ring system
Fig. 6
Figure similar
Tube preparation:
The tube has to be sawn in a right angle. An angular tolerance of ± 1° is permissible.
Slightly trim the pipe ends inside and outside. For thin walled steel pipes or soft pipes made of
nonferrous metal, reinforcing sleeves have to be used.
Pipe assembly:
Push union nut (5) and cutting ring (3) onto pipe (2). Insert pipe into socket (6) as far as it will go and
firmly press against pipe stop, otherwise incorrect assembly. Hand tighten union nut until socket,
cutting ring and union nut are locked. Tighten union nut 1
1
/
2
turns using a spanner wrench. The
cutting ring is noticeably locked to the socket face (for assembly inside pipe connection, hold up
valve with a spanner wrench). This should cause the cutting ring with its cutting edges (1) to cut into
the pipe resulting in a visible collar. In order to stick to the turns we recommend using marking lines
on union nut and pipe. After assembly, it is necessary to check the collar. The gasket must not be
damaged. At least 80 % of the cutting face has to be covered. After check-up, screw on and tighten
again as described above.
Collar
4
|
Compressor assembly
