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13
ENGLISH
HR unit
PRHR022A
PRHR023A
PRHR032A
PRHR033A
PRHR042A
PRHR043A
PRHR063A
PRHR083A
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 15.88 (5/8)
Installation of Zoning Control
Some indoor unit can be connected to one port of HR unit.
HR unit HR unit
sealing
Changeover under control Auto changeover Changeover under control
Zoning control group 1 Zoning control group 2
(Max. 8 Indoor Units)
(Max. 8 Indoor Units)
1
st
2 HR Unit
nd
HR Unit
4 3 2 1
BG
(38k) (92k)
B8
(48k)
BH
(72k)
B8
4 3 2 1
3 Series
NOTE
!
• A connection to un-neighboring pipes is forbidden.
Do not link more than 2 outlets.
• The B8 unit, which has the largest capacity, must be connected
to the 1st and 2nd outlets of the 1st HR unit. Other B8 units can
be connected to any two neighboring outlets within one HR unit.
1
st
HR Unit 2
nd
HR Unit
2
nd
HR Unit 1
st
HR Unit
4 3 2 1
B8
4 3 2 1
4 3 2 1
B8
4 3 2 1
2
nd
HR Unit 1
st
HR Unit
4 3 2 1
B8
(92k) (38k)
BG
4 3 2 1
B8
(72k)(34k)
BH
WARNING
• A branch pipe of HR unit allows up to 14.1 kW (48 kBtu/h) based
on cooling capacity of the indoor unit.
(up to 14.1 kW (48 kBtu/h) for max installation)
• The maximum total capacity of indoor units connected to a
PRHR042A HR unit is 56.4 kW (192 kBtu/h).
• The maximum number of indoor units connected to a PRHR042A
unit are 32 indoor units. (The Maximum indoor units per a branch
pipe of HR unit are 8 indoor units)
• There is not operate “Auto-changeover” & “Mode override”
function in the zoning group.
• When there are operating indoor units on cooling(heating) mode,
another indoor units aren’t changed on heating(cooling) mode in
the zoning group.
!
[Reducers for indoor unit and HR unit]
Unit : mm (inch)
Models
High pressure
–
Gas pipe
Low pressure
Liquid pipe
Indoor unit
reducer
HR unit
reducer
PRHR022A
PRHR023A
OD22.2(7/8)
Ø 19.05(3/4)
Ø 15.88(5/8)
OD15.88(5/8)
Ø 12.7(1/2)
Ø 6.35(1/4)OD9.52(3/8)
Ø 6.35(1/4)OD9.52(3/8)
OD19.05(3/4)
Ø 15.88(5/8)
OD12.7(1/2) Ø 9.52(3/8)
Ø 12.7(1/2)
OD22.2(7/8) Ø 19.05(3/4)
Ø 15.88(5/8)
OD15.88(5/8) Ø 12.7(1/2)
PRHR032A
PRHR042A
PRHR033A
PRHR043A
PRHR063A
PRHR083A
OD19.05(3/4)
Ø 15.88(5/8)
OD28.58(1-1/8)
Ø 22.2(7/8)
Ø 19.05(3/4)
OD15.88(5/8) Ø 12.7(1/2) Ø 9.52(3/8)
OD15.88(5/8)
Ø 12.7(1/2)
1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 13
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