LG ARUB115BT2 Installation Manual - Page 28

Type of HR Unit

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Refrigerant piping installation Type of HR Unit Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types by the number of connectable indoor units. Ex) Installation of 6 indoor units Consists of HR unit for 4 rooms and HR unit for 2 rooms. 2 1 PRHR020A(2 rooms) 123 PRHR030A(3 rooms) 1234 PRHR040A(4 rooms) WARNING • 1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW (48MBh) for max installation). • The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW (160MBh). In case of installation of four indoor units of 14.1kW (48MBh), use two PRHR020's rather than one PRHR040. Liquid pipe Low pressure gas pipe High pressure gas pipe 1234 Remove caps on The brazing part. Gas pipe Ø15.88 Liquid pipe Ø9.52 Brazing Type HR unit Low pressure gas pipe High pressure gas pipe Liquid pipe PRHR020A Ø22.2(7/8) Ø19.05(3/4) Ø9.52(3/8) PRHR030A Ø28.58(1-1/8) Ø22.2(7/8) Ø12.7(1/2) [Unit:mm(inch)] PRHR040A Ø28.58(1-1/8) Ø22.2(7/8) Ø12.7(1/2) 28 Outdoor Unit

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28
Outdoor Unit
Refrigerant piping installation
28
Outdoor Unit
Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types
by the number of connectable indoor units.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 rooms and HR unit for 2 rooms.
Type of HR Unit
PRHR030A(3 rooms)
PRHR020A(2 rooms)
PRHR040A(4 rooms)
1
2
3
1
2
1
3
2
4
WARNING
•
1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW
(48MBh) for max installation).
•
The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW
(160MBh). In case of installation of four indoor units of 14.1kW (48MBh), use two PRHR020's rather
than one PRHR040.
Gas pipe
Ø
15.88
Liquid pipe
Ø
9.52
Brazing Type
1
2
3
4
Remove caps on
The brazing part.
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
HR unit
PRHR020A
PRHR030A
PRHR040A
Low pressure gas pipe
Ø
22.2(7/8)
Ø
28.58(1-1/8)
Ø
28.58(1-1/8)
High pressure gas pipe
Ø
19.05(3/4)
Ø
22.2(7/8)
Ø
22.2(7/8)
Liquid pipe
Ø
9.52(3/8)
Ø
12.7(1/2)
Ø
12.7(1/2)
[Unit:mm(inch)]