AUX ACHP-H04/4R3HA, Техническое и сервисное руководство

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R32 Split Type - Air Source Heat Pump 20220105
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surface and the bearing surface, and avoid the pipe becoming deformed
Flared opening size ranges
2.5.5 Bending piping
Bending copper piping reduces the number of brazed joints required and can improve quality and save material
Piping bending methods
 Hand bending is suitable for thin copper piping (6. 35mm 12. 7mm).
 Mechanical bending (using a bending spring, manual bending machine or powered bending machine) is
suitable for a wide range of diameters (6. 35mm 54.0mm).
Pipe bending in excess of 90
Caution
 When using a spring bender, ensure that the bender is clean
before inserting it in the piping.
 After bending a copper pipe, ensure that there are no wrinkles or
deformation on either side of the pipe.
 Ensure that bend angles do not exceed 90, otherwise wrinkles
may appear on the inner side of the pipe, and the pipe may
buckle or crack.
 Do not use a pipe that has buckled during the bending process;
ensure that the cross section at the bend is greater than 2/3 of
the original area.
2.6 Refrigerant Piping Supports
When the air conditioning is running, the refrigerant piping will deform (shrink, expand and droop). To avoid
damage to piping, hangers or supports should be spaced as per the criteria. In general, the gas and liquid pipes
should be suspended in parallel and the interval between support points should be selected according to
the diameter of the gas pipe.
Refrigerant piping support spacings
Pipe (mm)
Interval between support points (m)
Horizontal Piping Vertical Piping
20 1 1.5
20-40 1.5 2
40 2 2.5
Suitable insulation should be provided between the piping and the supports. If wooden dowels or blocks are
to be used, use wood that has undergone preservative treatment.
Changes in refrigerant flow direction and refrigerant temperature result in movement, expansion and
shrinkage of the refrigerant piping. Piping should therefore not be fixed too tightly, otherwise stress
Pipe (mm) Flared opening diameter (A) (mm) Flared opening
6.35 8.7-9.1
9.53 12.8-13.2
12.7 16.2-16.6
15.9 19.3-19.7
19.1 23.6-24.0