Installation Of Zoning Control - LG Multi V PRHR042A Installation Manual

14
Joint Method of HR Unit
(Big Duct : ARNU763B8-, ARNU963B8-)
Joint Method is required when the big duct 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.
2 Series
st
1 HR Unit
1 2 3 4
B8 BG
(96 k) (28 k)
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
Remove caps on
The brazing part.
3 Series
st
1 HR Unit
4 3 2 1
BG B8
(38k) (92k)
NOTE
!
• A connection to un-neighboring pipes is forbidden.
Do not link more than 2 outlets.
st
1 HR Unit
4 3 2 1
B8
1 st HR Unit
4 3 2 1
B8
• 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.
st
1 HR Unit
4 3 2 1
B8 BG
(92k) (38k)
nd
2 HR Unit

Installation of Zoning Control

Some indoor unit can be connected to one port of HR unit.
1 2 3 4
BH B8
(21 k) (76 k)
3 4
1 2
Zoning control group 1
Gas pipe Ø 15.88 (5/8)
Liquid pipe Ø 9.52 (3/8)
Brazing Type
Changeover under control
nd
2 HR Unit
4 3 2 1
BH B8
(48k) (72k)
nd
2 HR Unit
4 3 2 1
[Reducers for indoor unit and HR unit]
* For more information, refer accessory installation manual.
2 nd HR Unit
Indoor unit
4 3 2 1
HR unit
nd
2 HR Unit
reducer
4 3 2 1
BH B8
(34k) (72k)
PRHR022A
HR unit
PRHR023A
Low pressure
Ø 22.2 (7/8)
gas pipe
High pressure
Ø 19.05 (3/4)
gas pipe
Liquid pipe Ø 9.52 (3/8)
HR unit
sealing
(Max. 8 Indoor Units)
Auto changeover
WARNING
!
• A branch pipe of HR unit allows up to 14.5kW(48kBtu/h) based
on cooling capacity of the indoor unit. (up to 14.5kW(48kBtu/h)
for max installation)
• The maximum total capacity of indoor units connected to a
PRHR043(A) HR unit is 58kW(192kBtu/h).
• The maximum number of indoor units connected to a
PRHR043(A) HR 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.
• For detailed instructions on installing the HR Unit, see the
installation manual included with the HR Unit.
Models
Liquid pipe
reducer
OD 9.52(3/8) Ø 6.35(1/4)
OD 19.05(3/4) Ø 15.88(5/8)
PRHR022A
OD 9.52(3/8) Ø 6.35(1/4)
PRHR023A
PRHR032A
PRHR042A
PRHR033A
OD 22.2(7/8) Ø 19.05(3/4) Ø 15.88(5/8)
OD 15.88(5/8) Ø 12.7(1/2) Ø 9.52(3/8)
PRHR043A
PRHR063A
PRHR083A
OD 12.7(1/2) Ø 9.52(3/8)
PRHR042A
PRHR032A PRHR043A
PRHR033A PRHR063A
PRHR083A
Ø 28.58 (1-1/8) Ø 28.58 (1-1/8)
Ø 22.2 (7/8) Ø 22.2 (7/8)
Ø 12.7 (1/2) Ø 15.88 (5/8)
HR unit
Zoning control group 2
(Max. 8 Indoor Units)
Changeover under control
Unit : mm (inch)
Gas pipe
High pressure Low pressure
-
OD 15.88(5/8) Ø 12.7(1/2)
Ø 12.7(1/2)
OD 22.2(7/8) Ø 19.05(3/4) Ø 15.88(5/8)
OD 12.7(1/2) Ø 9.52(3/8)
OD 15.88(5/8) Ø 12.7(1/2)
OD 28.58(1-1/8) Ø 22.2(7/8) Ø 19.05(3/4)
OD 15.88(5/8) Ø 12.7(1/2)
OD 19.05(3/4) Ø 15.88(5/8)