Type Of Hr Unit - LG multi v Installation Manual

REFRIGERANT PIPING INSTALLATION
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Type of HR Unit

Type of HR Unit
Select an HR unit according to the number of the indoor units to be installed. HR units are classi- Select an HR unit according to the number of the indoor units to be installed. HR units are classi-
fied into 3 types by the number of connectable indoor units. fied into 3 types by the number of connectable indoor units.
Ex) Installation of 6 indoor units Ex) Installation of 6 indoor units
Consists of HR unit for 4 branches and HR unit for 2 branches. Consists of HR unit for 4 branches and HR unit for 2 branches.
1
PRHR021A(2 branches)
Joint Method of HR Unit (Big Duct : ARNU763B8-, ARNU963B8-)
Joint Method is required when B5/B8 chassis is installed. In Joint Method, two neighboring out-
lets of one HR unit are linked by Y branch pipe and connected to one indoor unit.
st
1
1
B8
(96k) (28k)
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
Remove caps on
The brazing part.
HR unit
Low pressure gas pipe
High pressure gas pipe
Liquid pipe
2
PRHR031A(3 branches)
HR Unit
2 3 4
BG
PRHR021A
Ø22.2(7/8)
Ø19.05(3/4)
Ø9.52(3/8)
3
2
1
nd
2 HR Unit
1 2 3
BH B8
(21k) (76k)
Gas pipe Ø15.88 (5/8)
Liquid pipe Ø9.52 (3/8)
Brazing Type
PRHR031A
Ø28.58(1-1/8)
Ø22.2(7/8)
Ø12.7(1/2)
4
3
1 2
PRHR041A(4 branches)
4
3 4
1 2
Unit : mm(inch)
PRHR041A
Ø28.58(1-1/8)
Ø22.2(7/8)
Ø15.88(5/8)