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Check point of outdoor unit
B
A
Check point of indoor unit
4.3 Heat Insulation
Do the heat insulation to the pipes of air side and liquid side
separately. The temperature of the pipes of air side and liquid side
when cooling, for avoiding condensation please do the heat
insulation fully.
The air side pipe should use closed cell foamed insulation
material, which the fire-retardant is B1 grade and the heat
resistance over 120°C.
When the external diameter of copper pipe≤Φ12.7mm, the
thickness of the insulating layer at least more than 15mm;
When the external diameter of copper pipe≥Φ15.9mm, the
thickness of the insulating layer at least more than 20mm.
Please use attached heat-insulating materials do the heat
insulation without clearance for the connecting parts of the indoor
unit pipes.
The unit body
4.4 Connecting method
Select refrigerant pipe
Table 4-2
Pipe definition
The pipe between outdoor unit to the
Main pipe
first branch of indoor unit.
The pipe after the first branch do not
The main pipes of
drect connect with the indoor unit.
indoor unit
The branch pipes
The pipe after the branch connect with
of indoor unit
the indoor unit.
The pipes connect with the main pipe、
Indoor unit branch
the branch pipe and the the main pipe
pipes components
of indoor unit.
The first connect methond
Outdoor Unit
L
2
L
1
A
a
The First Line Branch Pipe
D
C
Fig. 4-2
Cut from upward
Site pipe side
Affiliated heat pump belt
Fig. 4-3
Pipe connect position
L
5
L
4
E
L
D
3
e
C
B
d
c
b
Fig. 4-4
The second connect methond
Outdoor Unit(Take Model 160 for example)
L
The First Line Branch Pipe
The distance between the first buranch to the last indoor unit is
more than 15m,choose the second connect methond.
The pipe between the indoor unit to the closest branch must less
than 15m.
4.4 Confirmation for the diameters of indoor
unit connecting pipes
Size of main pipe and corresponding branch joint and branch
header
1) R410A Indoor unit connecting pipes diameters 4-3。
2) Example 1：In the Fig.4-5,The downstream inner units of the
L2,and its total capacity is 28×2＝56，refers to the Table 4.4,the
air/liquid side of L2 is：Φ15.9/Φ9.5。
R410A Indoor unit connecting pipes diameters
Total capactiy of
the downstream
Code
inner units
L1
A＜166
L2～L5
166≤A＜230
a,b,c,
d,e,f
4.5 Confirmation for the diameters of outdoor
unit connecting pipes
A,B,C,
D,E
R410A outdoor unit connecting pipes diameters
Main pipe size when the tot-
Total capa-
al equivalent piping length
ctiy of The
of liquid + air side is <90m
outdoor
air side
units
(mm)
A＜160
Φ15.9
f
160≤A＜230
Φ19.1
The straight distance between copper pipe turning and the contig-
uous branch pipe is at least 0.5m;
a
L
2
B
1
A
b
L
3
L
4
D
C
L
5
E
NOTE
Main pipe size（mm）
Iiquid pipe
Air pipe
Φ15.9
Φ9.5
Φ19.1
Φ9.5
Main pipe size when the tot-
al equivalent piping length
of liquid + air side is ≥90m
liquid si-
The first Line
air side
de(mm)
Branch Pipe
(mm)
Φ9.5
Φ19.1
4TRDK01C
Φ9.5
Φ22.2
4TRDK01C
NOTE
N
1
(28)
Intdoor Units
N
2
(28)
N
3
(28)
c
N
4
(28)
d
e
f
N
N
5
6
(28)
(22)
Fig. 4-5
Table 4-3
Branch Pipe
4TRDK01C
4TRDK01C
4TRDK01C
Table 4-4
liquid si-
The first Line
Branch Pipe
de(mm)
Φ9.5
4TRDK01C
Φ9.5
4TRDK02C
installation manual
5
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