Service Port
No Use
(Weld with supplied
accessory pipe cap)
Liquid pipe
Gas pipe
CAUTION
Please block the pipe knock outs of the front and side panels after
installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)
!
WARNING
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body
if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas
leakage after the work.
!
For Heat Pump System Installation
A≥B≥C≥D (Capability)
① IDU side connection pipe
② ODU to ODU connection pipe (1st branch)
③ ODU to ODU connection pipe (2st branch)
④ ODU to ODU connection pipe (3rd brach)
(Master)
AB
(Slave1)
C
(Slave2)
D
(Slave3)
2 Unit
3 Unit
4 Unit
ARCNN21
ARCNN31
ARCNN41
C
C
A
Outdoor units Model
Liquid Pipe Gas Pipe
I.D.15.88 I.D.15.88
I.D.15.88
I.D.19.05
I.D.12.7
I.D.12.7
I.D.9.52
331
83
70
314
I.D.22.2
O.D.19.05
O.D.12.7
I.D.9.52
334
281
I.D.15.88
I.D.19.05
I.D.19.05
I.D.12.7
83
I.D.22.2
334
281
I.D.15.88
I.D.19.05
I.D.19.05
I.D.12.7
83
I.D.22.2
C
C
I.D.28.58
I.D.22.2
O.D.19.05
O.D.22.2
I.D.28.58
I.D.31.8
I.D. 19.05
O.D.15.88
I.D. 19.05O.D.15.88
I.D.22.2O.D.19.05
I.D.19.05O.D.15.88
I.D.19.05O.D.15.88
I.D.12.7
I.D.15.88
O.D.19.05
C
C
C
I.D.28.58
O.D.22.2
125
I.D.41.3
O.D.34.9
111
130
416
408
I.D.28.58 I.D.28.58
I.D.34.9
I.D.41.3 I.D.38.1
O.D.34.9
I.D.31.8
I.D.22.2
I.D.28.58
341
111
298
I.D.34.9
I.D.41.3
I.D.28.58
134
415
375
I.D.44.48 I.D.53.98
I.D.41.3
I.D.28.58
I.D.34.9O.D. 28.58I.D.22.2
I.D.34.9O.D.28.58I.D.22.2
I.D.34.9O.D.28.58I.D.22.2
I.D.53.98
I.D.44.5
O.D.41.3
I.D.34.9O.D.28.58I.D.22.2
O.D.41.3I.D. 44.5I.D.53.98
O.D.34.9
I.D.28.58
2, 3, 4 Outdoor Units
For more information, refer accessory installation manual.
Y branch
A
B
To outdoor unit
To branch piping or indoor unit
A
B
Viewed from point A
in direction of arrow
Within +/- 10
Connection of Outdoor units
When installing ODU series, refer below picture.
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outdoor
unit is divided at the end to connect to each indoor unit. Flare
connection for the indoor unit, and welding connection for the outdoor
pipe and the branching parts.
- Use hexagonal wrench to open/close the valve.
h In case of the heat pump system installation, be sure to maintain to
close no use pipe like below picture.
h Refer to the accessory installation manual provided.
REFRIGERANT PIPING
INSTALLATION
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