27
Refrigerant piping
Selection of kits with main pipe (L1), internal main
pipes (L2 to L5) and internal branch joint
The dimensions of the main pipe and of the internal
main pipes are indicated in the following table. Use
the specified branch joint kit. Use only pipes with the
dimensions indicated.
Total power
of indoor
units
Gas side
(Ø mm)
Liquid side
(Ø mm)
Branch joint
kit
< 16.6 15.9 9.5 FQZHN-01D
16.6 to 23
19.1 9.5 FQZHN-01D
Table 1
Selection of main pipe (L1) and first internal branch
joint (A)
If the equivalent length of all liquid pipes is less than
90m, use only the measurements of the main pipe and
of the internal main pipes indicated in the following table.
Use the specified branch joint kit. Use only pipes with the
dimensions indicated.
Total
capacity of
outdoor unit
Gas side
(Ø mm)
Liquid side
(Ø mm)
Branch joint
kit
< 16.6 15.9 9.5 FQZHN-01D
16.6 to 23
19.1 9.5 FQZHN-01D
Table 2
If the equivalent length of all liquid pipes is more than
90m, use only the measurements of the main pipe and
of the internal main pipes indicated in the following table.
Use the specified branch joint kit. Use only pipes with the
dimensions indicated.
Total
capacity of
outdoor unit
(Hp)
Gas side
(Ø mm)
Liquid side
(Ø mm)
Branch joint
kit
< 16.6 19.1 9.5 FQZHN-01D
16.6 to 23
22.2 9.5 FQZHN-02D
Table 3
Selection of internal auxiliary pipes
The internal auxiliary pipes (a...f) must respect the
diameter indicated in the table, based on the overall
power of the indoor units.
L
1
L
2
N
1
N
2
N
3
N
5
N
6
N
4
L
3
L
4
L
5
a
A
B
D
E
C
b
c
e
f
d
Fig. 36
Power of indoor
unit (kW)
Gas side
(Ø mm)
Liquid side
(Ø mm)
≤ 4.5
12.7 6.4
≥ 5.6
15.9 9.5
Table 4