24
Outside 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
PRHR030(3 rooms)
PRHR020(2 rooms)
PRHR040(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
(48kBtu/hr) for max installation).
•
The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW
(160kBtu/hr). In case of installation of four indoor units of 14.1kW (48kBtu/hr), 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
PRHR020
PRHR030
PRHR040
Low pressure gas pipe
Ø
22.2
Ø
28.58
Ø
28.58
High pressure gas pipe
Ø
19.05
Ø
22.2
Ø
22.2
Liquid pipe
Ø
9.52
Ø
12.7
Ø
12.7
(Unit: mm)
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
B5
(96k) (28k)
BG
1
2
3
4
B5
(76k)
(21k)
BH