EAS Electric VRV EVR 6 Series Instruction Manual page 43

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
The second connect methond
Outdoor Unit(Take Model 160 for example)
L
L
1
A
L
3
The First Line Branch Pipe
NOTE
Use the special-purpose branch branches provided by EAS
Electric Smart Technology only. Failing to do so may lead to
severe system malfunction.
If the distance from the first branch pipe to the last IDU exceeds
15 m, use connection method 2.
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。
Pipe connect position
L
5
L
4
E
L
D
3
e
C
B
d
c
b
Fig. 4-4
N
1
(28)
a
Intdoor Units
2
B
b N
2
(28)
N
3
(28)
c
L
4
N
D
4
C
(28)
d
L
5
e
E
f
N
5
(28)
Fig. 4-5
R410A Indoor unit connecting pipes diameters
Total capactiy of
the downstream
inner units
Code
A＜160
L1
160≤A＜230
L2～L5
4.5 Confirmation for the diameters of outdoor
a,b,c,
unit connecting pipes
d,e,f
R410A outdoor unit connecting pipes diameters
A,B,C,
Main pipe size when the tot-
D,E
Total capa-
al equivalent piping length
ctiy of The
of liquid + air side is <90m
outdoor
air side
units
(mm)
A＜155 Φ15.9
155≤A＜230 Φ19.1
f
The straight distance between copper pipe turning and the co
ntiguous branch pipe is at least 0.5 m.
The straight distance between the contiguous branch pipes is at
least 0.5 m.
The straight distance which the branch pipes connected to the
IDU is at least 0.5 m.
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.
The selection of branch header depends on the quantity of
branches it connects to.
N
6
(22)
Connection method
Table 4-5
8kW
10kW
12kW
14kW
16kW
Indoor unit
Branch pipe
Piping sizes at the branch pipe
Table 4-6
Indoor Unit Capacity
Refrigerant
R410A
15
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)
EVRI-BP1
Φ9.5 Φ19.1
EVRI-BP1
Φ9.5 Φ22.2
NOTE
Gas side
Flaring
Welding or Flaring
Welding or Flaring
Welding or Flaring
Welding or Flaring
Flaring
Welding or Flaring
Gas Side (Φ)
A(x100W)
12.7(Flaring nut)
A≤45
15.9(Flaring nut)
A≥56
Table 4-3
Branch Pipe
EVRI-BP1
EVRI-BP1
Table 4-4
liquid si- The first Line
de(mm) Branch Pipe
EVRI-BP1
Φ9.5
EVRI-BP2
Φ9.5
Liquid side
Flaring
Flaring
Flaring
Flaring
Flaring
Flaring
Welding or Flaring
Liquid Side (Φ)
6.4(Flaring nut)
9.5(Flaring nut)
V.1