R410A All DC Inverter V5 X Series 50Hz
MCAC-VTSM-2015-10
94 Installation
Outdoor unit branch pipe assembly
Quantity of outdoor
units
2 units
3 units
4 units
Outdoor
combination
Table 3: Outdoor unit connection pipe selection (g1, g2, g3, g4, G1, G2) Unit: mm
Pipe
Gas pipe
Liquid pipe
g1,g2,g3,g4
8~12HP
Φ25.4
Φ12.7
14~18HP
Φ31.8
Φ15.9
G1
Φ38.1
Φ19.1
G2
Φ41.3
Φ22.2
Table 4: Outdoor unit branching pipe assembly selection (L, M, N)
Outdoor unit quantity
Parallel connection with branch pipes
2 units
L: FQZHW-02N1D
3 units
L+M: FQZHW-03N1D
4 units
L+M+N: FQZHW-04N1D
Table 5: Indoor unit to the nearest branch joint (a~m) Unit: mm
Capacity of indoor unit
A×100W
The pipe length from indoor unit to the nearest
branch joint
≤10m
The pipe length from indoor unit to the nearest
branch joint
＞
10m
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
A
≤45
Φ12.7
Φ6.35
Φ15.9
Φ9.53
A
≥56
Φ15.9
Φ9.53
Φ19.1
Φ12.7
3.3 Example
Example below:
(Provided that the capacity of outdoor units is (12+12+18) HP, the equivalent length of all pipes in this system
is larger than 90m, the pipe length from the 1
st
branch joint to the farthest indoor unit is less than 40m, and the
pipe from indoor unit to the nearest branch joint is less than 10m.
Main pipe
L
g1
g2
L
M
g1
g2
G1
g3
Main pipe
L
M
N
G2
G1
g1
g2
g3
g4
Main pipe
N
1
(140)
N
4
(140)
N
7
(140)
N
8
(140)
N
10
(28)
N
12
(56)
N
11
(140)
N
3
(71)
N
6
(28)
N
13
(56)
A
B
G
H
K
I
L
C
E
L
1
L
2
L
3
L
5
L
7
L
8
L
11
L
12
L
9
a
c
d
f
g
h
j
l
m
k
M
L
g1
g2
g3
G1
W3
(12)
W2
(12)
W1
(18)
D
N
2
(140)
b
L
4
N
5
(140)
F
L
6
e
N
9
(71)
i
J
L
10
