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

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R32 Split Type - Air Source Heat Pump 20220105
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2.2 Pipe Size and Connect method
Refrigerant pipe connection
Models 4/6kW 8/10kW 12-16kW
Pipe size
Liquid side (9.52);
Gas side (15.9)
Liquid side (9.52);
Gas side (15.9)
Liquid side (9.52);
Gas side (15.9)
Connect method
Bell Mouth Bell Mouth Bell Mouth
2.3 Procedure and Principles
2.3.1Installation procedure
Notes for installers
：
Installation of the refrigerant piping system should proceed in the following order:
Pipe insulation → Pipe brazing and installation → Pipe flushing → Gas tightness test
→ Joint insulation → Vacuum drying
Note: Pipe flushing should be performed once the brazed connections have been completed with the exception
of the final connections to the indoor units. That is, flushing should be performed once the outdoor units have
been connected but before the indoor units are connected.
2.3.2 Three principles for refrigerant piping
Three
principles
Reasons for
principles
Measure
Clean
Particles such as oxide produced during brazing
and/or building dust can lead to compressor
malfunction
1.Seal piping during storage
2.Flow nitrogen during brazing
3.After brazing is complete, the lines are
flushed
DRY
Moisture can lead to ice formation or
oxidization of internal components
leading to abnormal operation or
compressor damage
1.Pipe flushing
2.Vacuum drying
SEALED
Imperfect seals can lead to refrigerant leakage
1.The line installation operator must have
skilled skills
2.Line air tightness check
3.After brazing is complete, the lines are
flushed
2.4 Storing Copper Piping
2.4.1 Pipe delivery, storage and sealing
Notes for installers No tes for installers

Ensure that piping does not get bent or deformed during delivery or whilst stored.
 On construction sites store piping in a designated location.
 To prevent dust or moisture entering, piping should be kept sealed whilst in storage and until it is about to
beconnected. If piping is to be used soon, seal the openings with plugs or adhesive tape. If piping is to be stored
for a long time, charge the piping with nitrogen at 0.20.5MPa and seal the openings by brazing.
 Storing piping directly on the ground risks dust or water ingress. Wooden supports can be used to raise
pipingoff the ground.
 During installation, ensure that piping to be inserted through a hole in a wall is sealed to ensure dust
and/orfragments of wall do not enter.
 Be sure to seal piping being installed outdoors (especially if being installed vertically) to prevent rain
entering.