Airwell YEVFD Série Manuel D'installation page 17

Installation instruction
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
Gas pipe side
Model
Diameter Connecting
(mm) method
4HP Ø15.88
5HP Ø15.88 Flared joint
6HP 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
Outdoor unit
First branch piping
Length of the longest piping after the
first branch piping L
piping L (*)
H
Liquid pipe side
Diameter Connecting
(mm) method
Ø9.52
Ø9.52 Flared joint
Ø9.52
Model (optional)
TAU-335
Indoor unit
Length of the longest piping L
Permissible value
Actual length
Up outdoor
Under outdoor
C. Pipe spec and the torque
Diameter (mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Ø22.22
Ø25.4
Not less than Ø28.58
Note: If the copper pipe with outer diameter 19.05 is coil
pipe, the thickness should be over 1.1.
9
h≤10m
Piping part
300m L1+L2+L3+L4+a+b+c+d+e
150m L1+L2+L3+L4+e
40m L2+L3+L4+e
50m ——
40m ——
15m ——
Thickness (mm) Torque (N.m)
0.8
0.8
1.0
1.0
1.0
1.1
1.2
More than 1.4
16~20
40~50
90~120
100~140
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