Haier MRV SII AU042FNEUA Service Manual page 34

Long pipe and high drop
1. Allowable pipe length and height difference
Outdoor unit
First branch piping
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
Drop
outdoor unit H
height
Drop height between indoor units h
Unit pipe spec and connection method (unit: mm)
A. Outdoor unit
Gas pipe side
Model
Diameter Connecting
(mm) method
AU04 Ø15.88
Flared joint
AU05 Ø15.88
B. Indoor unit
Please refer to the indoor air conditioner manul.
Connecting method: Flared joint
Branch pipe
Outdoor unit type
Branch pipe selection:
Total indoor capacity (100W)
Less than 335
Indoor unit
Length of the longest piping L
Length of the longest piping after the
first branch piping L(*)
ctual /Equivalent length
piping L (*)
Up outdoor
Under outdoor
C. Pipe spec and the torque
Liquid pipe side
Diameter Connecting
(mm) method
Ø9.52
Flared joint
Ø9.52
Not less than Ø28.58 More than 1.4
Model (optional)
FQG-B335A
32
h≤10m
Permissible
value
120m L1+L2+L3+L4+a+b+c+d+e
60/70m
40m
30m
20m
10m
Thickness
Diameter (mm)
(mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Ø22.22
Ø25.4
Note: If the copper pipe with outer diameter 19.05 is coil
pipe, the thickness should be over 1.1.
Piping part
L1+L2+L3+L4+e
L2+L3+L4+e
——
——
——
Torque (N.m)
0.8 16~20
0.8
40~50
1.0
1.0 90~120
1.0 100~140
1.1 ——
1.2 ——
——