LG Multi V PRHR033 Installation Manual page 11

Connection of Outdoor units
When installing ODU series, refer below picture.
A
(Master)
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
Outdoor Units Model
Ⓐ
2 Unit
ARCNB21
Ⓑ
3 Unit
ARCNB31
For more information, refer accessory installation manual.
B C
(Slave1) (Slave2)
Unit : mm(inch)
Pipe
Low Pressure Gas Pipe
I.D 22.2 O.D 28.58 I.D 34.9
(7/8) (1-1/8) (1-3/8)
416(16-3/8)
408(16-1/16)
I.D 28.58(1-1/8) I.D 22.2(7/8)
111
I.D 28.58
I.D 31.8(1-1/4) I.D 34.9(1-3/8) (4-3/8)
(1-1/8)
I.D 41.3 I.D 38.1 O.D 34.9
(1-5/8) (1-1/2) (1-3/8)
I.D 28.58(1-1/8)
130(5-1/8) I.D 22.2 O.D 28.58 I.D 34.9
(7/8) (1-1/8) (1-3/8)
Liquid Pipe
O.D 15.88(5/8) I.D 19.05(3/4)
331(13-1/32)
314(12-3/8)
I.D 15.88(5/8) I.D 15.88(5/8)
83
I.D 12.7 I.D 9.52
I.D 19.05(3/4)
(3-9/32)
(1/2) (3/8)
I.D 22.2 O.D 19.05
(7/8) (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)
70(2-3/4)
O.D 15.88(5/8) I.D 19.05(3/4)
High Pressure Gas Pipe
O.D 22.2 I.D 15.88(5/8)
I.D 19.05
(7/8)
(3/4)
416(16-3/8)
408(16-1/16)
I.D 28.58(1-1/8) I.D 22.2(7/8)
111
I.D 28.58
I.D 31.8 I.D 34.9 (4-3/8)
(1-1/8)
(1-1/4) (1-3/8)
I.D 28.58(1-1/8)
O.D 28.58 I.D 19.05(3/4)
(1-1/8)
1.D 22.2(7/8)
Low Pressure Gas Pipe
O.D 34.9 I.D 28.58 I.D 41.3 O.D 34.9
(1-3/8) (1-1/8)
(1-5/8) (1-3/8)
341(13-7/16)
298(11-23/32) 125
(4-29/32)
111
I.D 41.3(1-5/8) I.D 34.9
(4-3/8)
(1-3/8)
I.D 53.98 I.D 44.5 O.D 41.3
I.D 28.58(1-1/8)
(2-1/8) (1-3/4) (1-5/8)
I.D 22.2 O.D 28.58 I.D 34.9(1-3/8)
(7/8) (1-1/8)
Liquid Pipe
O.D 19.05(3/4) I.D 12.7(1/2) O.D 19.05
I.D 22.2(7/8)
I.D 15.88(5/8) (3/4)
334(13.5/32)
281(11-1/16)
83
I.D 19.05
I.D 22.2(7/8) I.D 19.05(3/4) (3-9/32)
(3/4)
O.D 19.05 I.D 22.2 I.D 28.58
I.D 15.88 I.D 12.7(1/2)
(3/4) (7/8) (1-1/8)
(5/8)
O.D 15.88(5/8) I.D 19.05(3/4)
High Pressure Gas Pipe
I.D 22.2 O.D 28.58 I.D 34.9
(7/8) (1-1/8) (1-3/8)
416(16-3/8)
408(16-1/16)
I.D 28.58(1-1/8) I.D 22.2(7/8)
111
I.D 28.58
I.D 31.8(1-1/4) I.D 34.9(1-3/8)
(4-3/8)
(1-1/8)
I.D 41.3 I.D 38.1 O.D 34.9
(1-5/8) (1-1/2) (1-3/8)
I.D 28.58(1-1/8)
130(5-1/8)
I.D 34.9 O.D 28.58 I.D 22.2
(1-3/8) (1-1/8) (7/8)
I.D 53.98 I.D 44.5 O.D 41.3
(2-1/8) (1-3/4) (1-5/8)
Y Branch
A
B
To Outdoor Unit
A
To branch piping or indoor unit
B
Facing Facing
downwards upwards
CAUTION
!
Y-branches between the outdoor units must be installed
horizontally.
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 Hanging bolt Hanging bolt
(M10 or M8)
Installation of Outdoor Unit, HR Unit, Indoor Unit
Refrigerant Pipe
3 pipes are connected to the HR unit from the outdoor unit, classified
into liquid pipe, low pressure gas pipe and high pressure gas pipe
depending on status of refrigerant passing through the pipe.
You must connect 3 pipes from outdoor unit to HR unit.
For connection between indoor unit and HR unit, you must connect
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
unit.
Within +/- 10°
Viewed from point A
in direction of arrow
A
Insulation
11