SYSVRF2 IM

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5.2.3 Main pipe (L1) and first indoor branch joint (A) selection
5.2.2 Main pipe (L1), indoor main pipes (L2 to L16) and indoor
branch joint kits selection
Table.5-2 Piping name definition
L2, L3, L4, L5,... L16
L1
a, b, c, d,... q
g1, g2, g3, G1
A, B, C, D, ... P
S, R
Pipe name
Code ( refer to Fig.5-1)
Main pipe
Indoor main pipes
Indoor auxiliary pipes
Indoor branch joints
Outdoor branch joints
Outdoor connection pipes
The main pipe (L1) and first indoor branch joint (A) should be
sized according to whichever of Tables 5-3 and 5-4 / 5-5
indicates the larger size.
Example: A system consisting of three outdoor units (32HP +
22HP + 12HP). The system's equivalent total liquid piping length
is in excess of 90m. Refer to Table 5-5, main pipe L1 isΦ44.5/
Φ22.2. The total capacity index of all indoor units is 1794, refer to
Table 5-3, main pipe L1 is Φ41.3 / Φ19.1. Main pipe L1 is the
larger of Φ44.5 / Φ22.2 and Φ41.3 / Φ19.1, hence Φ44.5/Φ
22.2.
5.2.1 Piping name definition
Main pipe (L1), indoor main pipes (L2 to L16)
and indoor branch joint kits selection
Table.5-3
Main pipe (L1) and first indoor branch joint (A) selectionTable.5-4
Main pipe (L1) and first indoor branch joint (A) selectionTable.5-5
Model
Φ19.1
Φ22.2
Φ25.4
Φ28.6
Φ28.6
Φ31.8
Φ41.3
Φ9.53
Φ9.53
Φ12.7
Φ12.7
Φ15.9
Φ19.1
Φ19.1
Equivalent length of all liquid pipes < 90m
8HP
10HP
12~14HP
16HP
18~24HP
26~34HP
56~66HP
Φ38.1
Φ19.1
Φ25.4
36~54HP
FQZHN-02D
FQZHN-02D
FQZHN-02D
FQZHN-03D
FQZHN-03D
FQZHN-03D
FQZHN-04D
FQZHN-05D
The first indoor
branch joint
Φ44.5
Φ50.8
Φ22.2
68~82HP
84~96HP
FQZHN-05D
FQZHN-05D
Model
Φ22.2
Φ25.4
Φ28.6
Φ31.8
Φ31.8
Φ38.1
Φ41.3
Φ54.0
Φ12.7
Φ12.7
Φ15.9
Φ15.9
Φ19.1
Φ22.2
Φ22.2
Φ25.4
Equivalent length of all liquid pipes ≥ 90m
8HP
10HP
12~14HP
16HP
18~24HP
36~54HP
26~34HP
68~82HP
Φ44.5
Φ22.2
56~66HP
FQZHN-02D
FQZHN-02D
FQZHN-03D
FQZHN-03D
FQZHN-03D
FQZHN-04D
FQZHN-04D
FQZHN-05D
FQZHN-06D
The first indoor
branch joint
Φ54.0
Φ28.6
84~96HP FQZHN-07D
Gas side
(mm)
Gas side
(mm)
Gas side
(mm)
Total capacity
of indoor units
A (×100W)
Liquid side
(mm)
Liquid side
(mm)
Liquid side
(mm)
Φ15.9
Φ19.1
Φ22.2
Φ28.6
Φ28.6
Φ38.1
Φ41.3
Φ31.8
Φ9.5
Φ9.5
Φ9.5
Φ12.7
Φ15.9
Φ19.1
Φ19.1
Φ19.1
A<168
168≤A<224
224≤A<330
330≤A<470
470≤A<710
710≤A<1040
1040≤A<1540
1540≤A<1800
1800≤A<2450
2690≤A
2450≤A<2690
FQZHN-01D
FQZHN-01D
FQZHN-03D
FQZHN-02D
FQZHN-05D
FQZHN-03D
FQZHN-03D
FQZHN-04D
Branch joint kit
Φ44.5
Φ22.2 FQZHN-05D
Φ54.0
Φ25.4 FQZHN-06D
Φ54.0
Φ28.6 FQZHN-07D
5.2.4 Outdoor branch pipe selection
Table.5-6 Outdoor connection pipes
Illustration
Outdoor
unit Qty.
2 units
3 units
Main pipe
R
g1g2
R
S
g1g2
G1
g3
Main pipe
Refer to Table.5-6 and Table.5-7 to select branch pipes for
combination outdoor unit. Before installation, please read the
Outdoor Unit Branch Joint Installation Manual carefully.