Installation guide

28
REFRIGERANT PIPING INSTALLATION
ENGLISH
Type of HR Unit
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.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 branches and HR unit for 2 branches.
PRHR031A(3 branches)PRHR021A(2 branches) PRHR041A(4 branches)
1
2
3
1
2
1
3
2
4
1
st
HR Unit 2
nd
HR Unit
1 2 3 4
B8
(96k) (28k)
BG
1 2 3 4
B8
(76k)(21k)
BH
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.
Gas pipe Ø15.88 (5/8)
Liquid pipe Ø9.52 (3/8)
Brazing Type
1
2
3
4
Remove caps on
The brazing part.
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
Unit : mm(inch)
HR unit PRHR021A PRHR031A PRHR041A
Low pressure gas pipe Ø22.2(7/8) Ø28.58(1-1/8) Ø28.58(1-1/8)
High pressure gas pipe Ø19.05(3/4) Ø22.2(7/8) Ø22.2(7/8)
Liquid pipe Ø9.52(3/8) Ø12.7(1/2) Ø15.88(5/8)
Type of HR Unit
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.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 branches and HR unit for 2 branches.