Kaysun KMF-120 DVN4, Installation Manual

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6
4.4 Connecting method
„
Select refrigerant pipe
Table 4-2
Pipe definition Pipe connect position Code
Main pipe
The pipe between outdoor unit to the
first branch of indoor unit.
L1
The main pipes of
indoor unit The pipe after the first branch do not
drect connect with the indoor unit.
L2~L5
The branch pipes
of indoor unit The pipe after the branch connect with
the indoor unit. a,b,c,
d,e,f
Indoor unit branch
pipes components
The pipes connect with the main pipe
the branch pipe and the the main pipe
of indoor unit.
A,B,C,
D,E
a
b
c
e
f
d
L
1
L
2
L
3
L
4
L
5
A
B
C
D
E
N
1
(28)
N
3
(28)
N
5
(28)
N
6
(22)
N
2
(28)
N
4
(28)
A
B
D
E
C
a
b
c
e
f
d
L
1
L
2
L
5
L
3
L
4
The First Line Branch Pipe
Outdoor Unit
The First Line Branch Pipe
Intdoor Units
Fig. 4-4
Fig. 4-5
NOTE
z
Use the special-purpose branch branches provided by Kaysun
only. Failing to do so may lead to severe system malfunction.
z
If the distance from the first branch pipe to the last IDU exceeds 15
m, use connection method 2.
z
The connection distance between the IDU and branch pipe should
not exceed 15 m.
4.4 Confirmation for the diameters of indoor
unit connecting pipes
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 Table 4-3
Total capactiy of the
downstream inner units
Main pipe size (mm)
Branch Pipe
Air pipe Iiquid pipe
A≤160 Φ15.9 Φ9.5 KCMI 112
160≤A<230 Φ19.1 Φ9.5 KCMI 112
4.5 Confirmation for the diameters of outdoor
unit connecting pipes
R410A outdoor unit connecting pipes diameters Table 4-4
Total capa-
ctiy of The
outdoor
units
Main pipe size when the total
equivalent piping length of air
side is <90m
Main pipe size when the total
equivalent piping length of air
side is ≥90m
air side
(mm)
liquid side
(mm)
The first Line
Branch Pipe
air side
(mm)
liquid side
(mm)
The first Line
Branch Pipe
A<155 Φ15.9 Φ9.5 KCMI 112 Φ19.1 Φ9.5 KCMI 112
155≤A<230 Φ19.1 Φ9.5 KCMI 112 Φ22.2 Φ9.5 KCMI 212
NOTE
z
The straight distance between copper pipe turning and the co
ntiguous branch pipe is at least 0.5 m.
z
The straight distance between the contiguous branch pipes is at
least 0.5 m.
z
The straight distance which the branch pipes connected to the IDU
is at least 0.5 m.
z
Select branch joint
Select the branch joint according to the total designed capacity of
indoor units which it connects to. If this capacity is more than that
of the outdoor unit, then select the connection according to the
outdoor unit.
z
The selection of branch header depends on the quantity of
branches it connects to.
„
Connection method
Table 4-5
Gas side Liquid side
8kW Flaring Flaring
10kW Welding or Flaring Flaring
12kW Welding or Flaring Flaring
14kW Welding or Flaring Flaring
16kW Welding or Flaring Flaring
Indoor unit Flaring Flaring
Branch pipe Welding or Flaring Welding or Flaring
„
Piping sizes at the branch pipe
Table 4-6
Refrigerant
Indoor Unit
Capacity
A(x100W)
Gas Side (Φ) Liquid Side (Φ)
R410A
A≤45 12.7(Flaring nut) 6.4(Flaring nut)
A≥56 15.9(Flaring nut) 9.5(Flaring nut)
z
The first connect methond
z
The second connect methond