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

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R32 Split Type - Air Source Heat Pump 20220105
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Piping orientation during brazing:
Brazing should be conducted downwards or horizontally to avoid filler leakage.
Piping orientation during brazing
Piping overlap during brazing
：
specifies the minimum permissible piping overlap and the range of permissible gap sizes for brazed joints
on piping of different diameters.
Piping overlap and gap for brazed joints
Piping overlap and gap for brazed joints
D (mm) Minimum permissible B (mm) Permissible A D (mm)
5D8 6
0.05-0.21
8D12 7
12D16 8
0.05-0.27
16D25 10
25D35 12
0.05-0.35
35D45 14
 Use a copper/phosphorus brazing alloy (BCuP) filler that does not require flux.
 Do not use flux. Flux can cause corrosion of piping and can affect the performance of compressor oil.
 Do not use antioxidants when brazing. Residue can clog piping and damage components.
2.8 Pipe Flushing
2.8.1 Purpose
To remove dust, other particles and moisture, which could cause compressor malfunction if not flushed out
before the system is run, the refrigerant piping should be flushed using nitrogen. As described in Part 3, 3.3.1
Installation procedure, pipe flushing should be performed once the piping connections have been completed with
the exception of the final connections to the hydronic box. That is, flushing should be performed once the
outdoor unit have been connected but before the hydronic box is connected.
Legend
A Inner diameter of larger pipe
B Inlaid depth (overlap)
D Outer diameter of smaller pipe