LG ARUB230BT2 Installation Manual page 27

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.
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.
Liquid pipe
CAUTION:
Whenever connecting the indoor units with the HR unit, install the indoor 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).
HR Unit
Low pressure
Gas pipe
3 4
1 2
High pressure
Gas pipe
Refrigerant piping installation
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)
Insulation
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Installation Manual 27
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