SYSVRF AHU S IOM

5
installation manual
5. MATERIAL AND SIZE OF THE PIPING
Size(mm)
Pipe Material Copper Pipe for Air Conditioner
Model
Φ8
Φ8
AHU 5HP
(Liquid in)
(Liquid out)
Φ12.7
Φ12.7
AHU 10HP
Table.5-1
6. REFRIGERANT PIPE
CAUTION
AHU 20HP
Φ16
Φ16
The connecting distance of each control box and indoor unit
should not more than 8 m.
This control box can only connect to R410A refrigerant system.
This control box can only connect to VRF system.
This control box can not connect heat recovery system.
During the installation of connecting pipes, do not let air, dust, or
other sundries enter to the piping system.
Install the connecting pipe only after the indoor and outdoor
units have been fixed.
When installing the connecting pipes, it must be kept dry and do
not let water enter to the piping system.
The connecting copper pipes must be wrapped with thermal
insulation materials (usually the thickness should be more than
10mm; in some humid area it should be thicken properly).
1
2
3
4
5
6
7
8
Table.6-1
L1, L2
a1,a2,b1,b2,c1,c2
A, B
Pipe name
Code ( refer to Fig.6-1)
Controller box main pipe
Controller box aux. pipe
Controller box branch joint assembly
e.x.1: Refer to Fig.6-1 , the capacity of downstream controller box to L4
is 560+280+140=980, the pipe is Φ19.1.
6-1 Pipe classification
Capacity of
controller box
A(×100W)
Size of main pipe(mm)
Liquid side(mm)
Φ12.7
Φ15.9
Φ19.1
Φ22.2
200<A<460
460≤A<660
660≤A<1350
1350≤A
Table.6-2
JOINT 02
JOINT 01
JOINT 03
JOINT 04
Available branch joint
6-3 Example
Controller box capacity
A(×100W)
Φ9.5 Φ12.7 Φ15.9
Table.6-3
Take (56+36+20) kW that composed by three controller
box as an example to clarify the pipe selection.
The branch pipe at the controller box.
There are a~c branch pipe at the controller box, the branch
pipe diameter should be select as Table. 6-3.
Main pipe at the controller box (Refer to Table. 6-2)
The main pipe L
1 L2 with N1, N2 downstream controller box that
total capacity is 280+140=420, the pipe L
1 diameter is Φ12.7,
thus select
JOINT 01 for the branch joint B.
The branch joint A with N
0~N2 downstream controller box that
total capacity is 560+280+140=980, thus select JOINT 03 for
the branch joint A.
A
B
1)
2)
AHU 5HP
90<A≤200
Liquld side(mm)
AHU 10HP
200<A≤360
AHU 20HP
360<A≤560
Fig.6-1
6-2 Size of joint pipe for 410A indoor unit
NOTE
a2+L4≤8m b2+L2+L4≤8m c2+L2+L4≤8m
A
a1
L1
B
b1
c1
Liquid pipe
Gas pipe
Indoor unit
outdoor unit
a2
b2
c2
L2
Liquid pipe
AHUKZ-03B(56kW)
AHUKZ-02B(28W)
AHUKZ-01B(14kW)
A
B
N0
N1
N2
L3
L4
The connecting distance of each control box and indoor unit
should not more than 8 m