MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF
Installation 51
4.3 Refrigerant pipe selection
The first connecting method
The second connecting method
Pipe definition
Pipe connecting position
Code
Main pipe
The pipe between outdoor
units to the first branch of
indoor unit.
L1
The main pipes of indoor unit
The pipe after the first branch
does not direct connect with
the indoor unit.
L2
～
L5
The branch pipes of indoor unit
The pipe after the branch
connects 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 main pipe of indoor
unit.
A,B,C,D,E
Note: The distance between the first branch to the last indoor unit is more than 15m, choose the second connecting method. The
pipe between the indoor units to the closest branch must be less than 15m.
Table 1: Indoor unit branch pipes selection (a~f)
A: Capacity of indoor units (kW)
A (kW)
Gas Si
de(Φ)
Liquid Side(Φ)
A
≤
4.5
12.7(Flaring nut)
6.4(Flaring nut)
A
≥
5.6
15.9(Flaring nut)
9.53(Flaring nut)
Note: The maximum length of the branch pipe should not be longer than 15m.
The first Line Branch Pipe
Outdoor Unit
a
b
c
e
f
d
L1
L2
L3
L4
L5
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(Take Model 160 for example)
intdoor Units
Summary of Contents for MDV-120W/DON1
Page 3: ......
