Refrigerant Pipe - LG ARWB200LAS4 Installation Manual

Connection of Outside units
Outside units Model Low Pressure Gas Pipe
A B
(Master) (Slave1)
I.D.28.58
A ARCNN21
2 Unit
I.D.31.8 I.D.34.9
I.D.41.3 I.D.38.1 O.D.34.9
A B C
(Master) (Slave1) (Slave2)
3 Unit
I.D.41.3
ARCNN31
I.D.41.3
A B C D
(Master) (Slave1) (Slave2) (Slave3)
4 Unit
ARCNN41
C
I.D.44.48 I.D.53.98
C
* Install the branch pipe between outside units so that the outlet pipe
is parallel to the surface.
Y branch
A
B
To outside unit
A
To branch piping or indoor unit
B
Facing Facing
downwards upwards
Within ± 3° Within ± 3°
!
CAUTION
When installing the branch pipe vertically between the outside
units, the refrigerant can be uneven between the outside units,
leading to compressor burn and reduced capacity.
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 hang-
ing 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 Hanging bolt Hanging bolt
(M10 or M8)
Liquid Pipe High Pressure Gas Pipe
416 331 334
408 314
281
I.D.28.58 I.D.15.88 I.D.15.88
111 I.D.12.7 I.D.9.52 83
I.D.19.05
I.D.22.2
I.D.22.2 I.D.19.05
I.D.22.2 O.D.19.05
I.D.28.58 I.D.12.7 I.D.15.88
130 70
341
334 416
298
281 408
I.D.28.58
I.D.34.9
111 83
I.D.19.05
I.D.22.2 I.D.19.05 I.D.31.8 I.D.34.9
O.D.34.9
I.D.41.3 I.D.38.1 O.D.34.9
I.D.28.58 I.D.15.88 I.D.12.7
125
130
415 341
334
375 298
281
83
I.D.19.05
134 I.D.22.2 I.D.19.05
I.D.41.3 I.D.41.3
I.D.25.4 O.D.22.2
I.D.41.3 O.D.34.9
I.D.15.88 I.D.12.7
I.D.28.58
80
125
Within +/- 10
Viewed from point A
in direction of arrow
A
Insulation
Installation of Outside Unit, HR Unit, Indoor Unit

Refrigerant Pipe

3 pipes are connected to the HR unit from the outside unit, classified
into liquid pipe, low pressure gas pipe and high pressure gas pipe de-
pending on status of refrigerant passing through the pipe.
You must connect 3 pipes from outside unit to HR unit.
83
I.D.19.05
For connection between indoor unit and HR unit, you must connect
I.D.15.88 I.D.12.7
both liquid pipe and gas pipe from the HR unit to the indoor unit. In this
case, connect them to the indoor unit starting from No.1 connection
port of the HR unit (the port number is displayed on ports of the HR
unit). Use auxiliary flare as annexed parts in connection to the indoor
I.D.28.58
unit.
111
I.D.22.2
I.D.28.58
Liquid pipe
Low pressure
I.D.34.9
111
Gas pipe
I.D.28.58
High pressure Gas pipe
! CAUTION
Whenever connecting the indoor units with the HR unit, install the in-
door units in numerical order from No.1.
Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X),
No.1, 3, 4 (X), No.2, 3, 4 (X).
Type of HR Unit
Select an HR unit according to the number of the indoor units to be in-
stalled. HR units are classified into 3 types by the number of con-
nectable indoor units.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 branches and HR unit for 2 branches.
PRHR021(2 branches)
Joint Method of HR Unit (Big Duct : ARNU76GB8-,
ARNU96GB8-)
Joint Method is required when B5/B8 chassis is installed. In Joint
Method, two neighboring outlets of one HR unit are linked by Y branch
pipe and connected to one indoor unit.
st
1 HR Unit
1 2 3 4
B8 BG
(96k) (28k)
Gas pipe
HR Unit
Liquid pipe
3 4
1 2
Gas pipe
Liquid pipe
2
1
PRHR031(3 branches)
3 4
1 2
PRHR041(4 branches)
nd
2 HR Unit
1
BH
(21k)
13
3
2
1
2 3 4
B8
(76k)