Copper Pipe Selection; Long Pipe And High Drop; Unit Pipe Spec And Connection Method; Outdoor Unit - Haier AU042FPERA Service Manual

Copper pipe selection:

hardness
Outer diameter (mm)
Min. thickness (mm)
Note: If the copper pipe with outer diameter 19.05 is coil pipe, the thickness should be over 1.1.

Long pipe and high drop

1. Allowable pipe length and height difference
Maximal length and drop height permissible of refrigerant piping
Total length of piping (actual length)
Piping
Longest piping L
length
Piping length of indoor unit which is furthest to the first branch
Drop height between indoor and outdoor unit
Drop
height
Drop height between indoor units h
Unit pipe spec and connection method (unit: mm)
A. Outdoor unit
Model
Diameter (mm)
AU04
AU05
AU06
Softness
Ø6.35 Ø9.52 Ø12.7
0.8 0.8 1.0

Outdoor unit

First branch piping
Length of the longest piping after the
first branch piping L
piping L (*)
H
Gas pipe side
Connecting method
Ø15.88
Ø15.88 Flared joint
Ø15.88
Half-hardness
Ø15.88 Ø19.05 Ø22.22 Ø25.24 Ø28.58
1.0 1.0 1.1
Indoor unit
Length of the longest piping L
Permissible
value
300m
Actual length 150m
40m
Up outdoor 50m
Under outdoor 40m
15m
Liquid pipe side
Diameter (mm)
Ø9.52
Ø9.52
Ø9.52
23
1.2 1.4
h≤10m
Piping part
L1+L2+L3+L4+a+b+c+d+e
L1+L2+L3+L4+e
L2+L3+L4+e
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Connecting method
Flared joint