MCAC-VTSM-2011-09
Installation
Piping Selection
65
1.1.2 Select the refrigerant piping
Note: In the above drawing, the capacity unit of indoor side is (×100W), and the outdoor side is HP.
The Pipe Type
The Detailed Pipe Place
Code
The main pipe
The pipe between outdoor and the first indoor branch
L1
Indoor main pipe
The pipe between indoor main branches
L2~L11
Indoor auxiliary pipe
The pipe between indoor branches
a, b,
…n
Indoor main branch
The branch for MS equipment
A,B,C,D,E
Indoor auxiliary branch
The branch connecting directly to indoor unit
I, II, III, IV
Outdoor branch
The outdoor branch assy.
L,M
Outdoor unit pipe
The pipe between outdoor unit and outdoor branch, pipe between
outdoor branches
g1, g2, g3, G1
MS Equipment
For shift heating/cooling mode.
MS1,
… MS6
1.1.2.1 Selection of the main pipe (L1)
E.g. The main pipe (L1) in the above drawing
Please refer to the following table:
Model
The Max. equivalent length of tubing
﹤
90m
The Max. equivalent length of tubing ≥90m
Suction
Gas pipe
High-pressure
gas pipe
High-pressure
liquid pipe
The first
branch
Suction
Gas pipe
High-pressure
gas
High-pressure
liquid
The first branch
8HP
Φ22.2
Φ19.1
Φ12.7
FQZHN-02S
Φ25.4
Φ19.1
Φ12.7
FQZHN-02S
10HP
Φ25.4
Φ19.1
Φ12.7
FQZHN-02S
Φ25.4
Φ19.1
Φ12.7
FQZHN-02S
16HP
Φ28.6
Φ22.2
Φ15.9
FQZHN-03S
Φ31.8
Φ28.6
Φ15.9
FQZHN-03S
18~20HP
Φ31.8
Φ28.6
Φ15.9
FQZHN-03S
Φ31.8
Φ28.6
Φ19.1
FQZHN-03S
24HP
Φ34.9
Φ28.6
Φ15.9
FQZHN-04S
Φ34.9
Φ28.6
Φ19.1
FQZHN-04S
26~30HP
Φ34.9
Φ28.6
Φ19.1
FQZHN-04S
Φ38.1
Φ31.8
Φ22.2
FQZHN-04S
Notice:
If the total indoor units’ capacity is more than the total outdoor units’, please select the main pipe dia.
L
1
W3
(8)
W2
(8)
W1
(10)
M
L
g1
j
j
j
j
j
j
g2
g3
G1
N3
(140)
N5
(140)
N6
(71)
N7
(71)
N9
(56)
N8
(28)
N2
(71)
N4
(28)
N1
(71)
N10
(56)
A
B
C
D
E
Ⅱ
Ⅳ
Ⅲ
Ⅰ
b
c
d
f
g
j
h
i
l
k
m
n
e
L
2
L
7
L
11
L
9
L
8
L
10
L
3
a
MS1
MS2
MS3
MS4
MS5
MS6
L
4
L
5
L
6
