Installation guide

26 Outdoor Unit
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 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
Gas pipe Ø15.88
Liquid pipe Ø9.52
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))
Joint Method of HR Unit (Big Duct : URNU76GB8-, URNU96GB8-)
Joint Method is required when B5/B8 chassis is installed. In Joint Method, two neighboring outlets of
one HR unit are linked by Y branch pipe and connected to one indoor unit.
1
st
HR Unit 2
nd
HR Unit
1 2 3 4
B8
(96k) (28k)
BG
1 2 3 4
B8
(76k)(21k)
BH
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)