Precautions On Pipe Connection / Valve Operation; Connection Of Outdoor Units; Installation Procedure For Hr Unit - LG MULTI V 5 ARUM160LTE5 Installation Manual

For Heat Recovery System Installation

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.
Liquid pipe
Low Pressure Gas 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.
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.)

Connection of Outdoor units

When installing ODU series, refer below picture.
A B
(Master) (Slave1)
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)
Service Port
C D
(Slave2) (Slave3)
2, 3, 4 Outdoor Units
Outdoor units Model Low Pressure Gas Pipe
I.D.22.2 O.D. 28.58
416
408
C
I.D.28.58
ARCNB21
C
2 Unit
I.D.31.8 I.D.34.9
I.D.41.3 I.D.38.1 O.D.34.9
C
130
I.D.22.2
C
O.D.34.9 I.D.28.58
C
3 Unit ARCNB31
I.D.41.3
I.D.53.98 I.D. 44.5
C
I.D.22.2
O.D.41.3 I.D.44.5
ARCNB41
A
4 Unit
I.D.44.48 I.D.53.98
C
I.D.22.2 O.D.28.58
For more information, refer accessory installation manual.
Y branch
A
A To outdoor unit
To branch piping or indoor unit
B

Installation procedure for HR unit

1
Using an insert-hole-in- anchor, hang the hanging bolt.
2
Install a hexagon nut and a flat washer (locally-procured)to the
hanging bolt as shown in the figure in the bottom, and fit the main
unit to hang on the hanger metal.
3
After checking with a level that the unit is level, tighten the hexagon
nut.
* The tilt of the unit should be within ±5 ° in front/back and left/right.
4
This unit should be installed suspended from ceiling and side A
should always be facing up.
5
Insulate not used pipes completely as shown in the figure.
Six-sided Nut
(M10 or M8)
Hanger metal Hanger metal Hanger metal
Flat washer Flat washer Flat washer
(M10)
Hanging bolt
(M10 or M8)
Liquid Pipe High Pressure Gas Pipe
O.D.15.88 I.D. 19.05 O.D.22.2
I.D.34.9
I.D.19.05
331
314 416
I.D.15.88 I.D.15.88
408
I.D.28.58
I.D.28.58
I.D.12.7 I.D.9.52 83
I.D.19.05
111
I.D.22.2
I.D.31.8 I.D.34.9
I.D.22.2 O.D.19.05
I.D.12.7
I.D.15.88
I.D.28.58
O.D.12.7 I.D.9.52
70
O.D.28.58
I.D.22.2
O.D.28.58 I.D.34.9 O.D.15.88 I.D. 19.05
I.D.41.3 O.D.34.9
I.D.22.2 O.D.28.58
O.D.19.05 I.D.12.7
O.D.19.05 I.D.22.2
I.D.15.88
125 416
341 408
334
298 I.D.28.58
281
I.D.31.8 I.D.34.9
I.D.34.9
111
I.D.19.05 83
I.D.22.2 I.D.19.05 I.D.41.3 I.D.38.1 O.D.34.9
I.D.28.58
I.D.15.88 I.D.12.7 130
O.D.41.3
O.D.190.05 I.D.22.2 I.D.28.58
I.D. 34.9
O.D.28.58 I.D.34.9
O.D.15.88 I.D.19.05
I.D.53.98 I.D.44.5 O.D.41.3
I.D.53.98 O.D.19.05 I.D.22.2 I.D.28.58 O.D.34.9 I.D.41.3
415 341
334
375
281 298
I.D.19.05 83
134 I.D.22.2 I.D.19.05
I.D.41.3 I.D.41.3
I.D.15.88 I.D.12.7
I.D.31.8 I.D.28.58 O.D.22.2
I.D.28.58 I.D.53.98 I.D.44.5 O.D.41.3
I.D.34.9
O.D.15.88 I.D.19.05
I.D.34.9 O.D.28.58
Within +/- 10
B
Viewed from point A
in direction of arrow
A
Insulation
15
I.D.15.88
I.D.28.58
111
I.D.22.2
I.D.28.58
I.D. 19.05
I.D.34.9
I.D.28.58
111
I.D.22.2
I.D.28.58
O.D.28.58 I.D.22.2
I.D.44.5
I.D.34.9
111
I.D.28.58
I.D.22.2