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11
ENGLISH
Service Port
Low Pressure Gas pipe
Liquid pipe
High Pressure Gas pipe
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 Recovery System Installation
A≥B≥C
① IDU side connection pipe
② ODU to ODU connection pipe (1st branch)
③ ODU to ODU connection pipe (2nd branch)
2, 3 Outdoor Units
(Master)
AB
(Slave1)
C
(Slave2)
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
Facing
upwards
Facing
downwards
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. (Including HR Unit)
- Use hexagonal wrench to open/close the valve.
REFRIGERANT PIPING INSTALLATION
Unit : mm(inch)
Outdoor Units Model Pipe
2 Unit
Ⓐ
ARCNB21
Low Pressure Gas Pipe
I.D.22.2
(7/8)
O.D.28.58
(1-1/8)
416(16-3/8)
I.D.28.58(1-1/8)
I.D.31.8(1-1/4)
I.D.41.3
(1-5/8)
130(5-1/8)
I.D.22.2
(7/8)
O.D.28.58
(1-1/8)
I.D.34.9
(1-3/8)
I.D.28.58(1-1/8)
I.D.28.58
(1-1/8)
111
(4-3/8)
I.D.38.1
(1-1/2)
O.D.34.9
(1-3/8)
I.D.34.9(1-3/8)
I.D.22.2(7/8)
408(16-1/16)
I.D.34.9
(1-3/8)
Liquid Pipe
I.D.19.05(3/4)
I.D.15.88(5/8)
I.D.19.05(3/4)
I.D.12.7
(1/2)
I.D.9.52
(3/8)
83
(3-9/32)
I.D.22.2
(7/8)
70(2-3/4)
O.D.19.05
(3/4)
I.D.12.7(1/2) I.D.15.88(5/8)
O.D.12.7(1/2)
I.D.9.52(3/8)
O.D.15.88(5/8)
I.D.19.05(3/4)
I.D.15.88(5/8)
O.D.15.88(5/8)
331(13-1/32)
314(12-3/8)
High Pressure Gas Pipe
I.D.15.88(5/8)O.D.22.2
(7/8)
I.D.19.05
(3/4)
I.D.28.58(1-1/8)
I.D.31.8
(1-1/4)
O.D.28.58
(1-1/8)
1.D.22.2(7/8)
I.D.19.05(3/4)
I.D.28.58(1-1/8)
111
(4-3/8)
I.D.34.9
(1-3/8)
I.D.28.58
(1-1/8)
I.D.22.2(7/8)
416(16-3/8)
408(16-1/16)
3 Unit
Ⓑ
ARCNB31
Low Pressure Gas Pipe
O.D.34.9
(1-3/8)
I.D.28.58
(1-1/8)
I.D.41.3
(1-5/8)
O.D.34.9
(1-3/8)
I.D.41.3(1-5/8)
I.D.53.98
(2-1/8)
I.D.44.5
(1-3/4)
O.D.41.3
(1-5/8)
I.D.22.2
(7/8)
I.D.34.9(1-3/8)O.D.28.58
(1-1/8)
I.D.28.58(1-1/8)
I.D.34.9
(1-3/8)
341(13-7/16)
125
(4-29/32)
111
(4-3/8)
298(11-23/32)
Liquid Pipe
O.D.19.05(3/4)
I.D.22.2(7/8)
O.D.19.05
(3/4)
I.D.22.2
(7/8)
I.D.28.58
(1-1/8)
I.D.15.88
(5/8)
I.D.19.05
(3/4)
83
(3-9/32)
I.D.12.7(1/2)
O.D.15.88(5/8) I.D.19.05(3/4)
I.D.19.05(3/4)
I.D.12.7(1/2)
O.D.19.05
(3/4)
I.D.22.2(7/8)
I.D.15.88(5/8)
334(13.5/32)
281(11-1/16)
High Pressure Gas Pipe
I.D.22.2
(7/8)
I.D.28.58(1-1/8)
I.D.31.8(1-1/4)
I.D.41.3
(1-5/8)
I.D.53.98
(2-1/8)
I.D.44.5
(1-3/4)
O.D.41.3
(1-5/8)
130(5-1/8)
I.D.38.1
(1-1/2)
O.D.34.9
(1-3/8)
I.D.34.9(1-3/8)
I.D.28.58(1-1/8)
111
(4-3/8)
I.D.34.9
(1-3/8)
O.D.28.58
(1-1/8)
I.D.22.2
(7/8)
I.D.28.58
(1-1/8)
I.D.22.2(7/8)
O.D.28.58
(1-1/8)
416(16-3/8)
408(16-1/16)
I.D.34.9
(1-3/8)
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.)
CAUTION
!
Y-branches between the outside units must be installed horizontally.
CAUTION
!
1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 11
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