LG Multi V PRHR042A Installation Manual page 20

20
Y branch, Header and HR unit connection pattern
Pattern 1
B
HR1
1 2
14.5kW 14.5kW
(48kBtu/h) (48kBtu/h) (48kBtu/h)
• Impossible installation : Head branch pipe → HR unit
Pattern 2
HR1
B
1 2 3 4
2.1kW 2.1kW 2.1kW 2.1kW
(7kBtu/h) (7kBtu/h) (7kBtu/h) (7kBtu/h)
• Impossible installation : HR unit → Head branch
pipe → Y and Head branch pipe.
Pattern 3
1 2
14.5kW 14.5kW
(48kBtu/h) (48kBtu/h)
• The maximum total capacity of indoor
units is 58kW(192 kBtu/h).
Pattern 4
HR1
B
1 2
3.63kW 3.63kW
(12kBtu/h) (12kBtu/h)
• The maximum total capacity of a branch
pipe of HR unit is 14.5kW(48 kBtu/h).
HR2
3 4
14.5kW 14.5kW
(48kBtu/h)
A
5 6 7
2.1kW 7.25kW 7.25kW
(7kBtu/h) (24kBtu/h) (24kBtu/h)
HR1
3 4
14.5kW 14.5kW
(48kBtu/h) (48kBtu/h)
3 4
3.63kW 3.63kW
(12kBtu/h) (12kBtu/h)
Pattern 5
A
(48kBtu/h)
Pattern 6
HR1
B
1 2
7.25kW 7.25kW
(24kBtu/h) (24kBtu/h)
Pattern 7
A
HR1
1 2
14.5kW 14.5kW
(48kBtu/h) (48kBtu/h)
• * : Serial connection of HR units : Capacity sum of indoor units ≤ 192 kBtu/h
Pattern 8
A
HR1
1 2
14.5kW 14.5kW
(48kBtu/h) (48kBtu/h)
• * : Maximum indoor units per a branch are 8 indoor units
Indoor Unit Y Branch pipe
1
Low pressure Gas pipe
Outdoor
High pressure Gas pipe
Unit
Liquid pipe
• Pipe installation from outdoor units to HR units
: 3 pipes(Low pressure Gas pipe, High pressure Gas pipe, Liquid pipe)
• Pipe installation from HR units to indoor units
: 2 pipes(Gas pipe, Liquid pipe)
HR1 HR2
1 2 3 4
14.5kW 14.5kW 14.5kW 14.5kW
(48kBtu/h) (48kBtu/h) (48kBtu/h)
A
A
A
3 4 5
3.63kW 3.63kW 7.25kW
(12kBtu/h) (12kBtu/h) (24kBtu/h)
HR2 HR3
3 4 5
14.5kW 14.5kW 14.5kW 14.5kW
(48kBtu/h) (48kBtu/h) (48kBtu/h) (48kBtu/h)
HR2
A
B
3 4 5 6
3.63kW 3.63kW 3.63kW 3.63kW 7.25kW
(12kBtu/h) (12kBtu/h) (12kBtu/h) (12kBtu/h) (24kBtu/h)
Head Branch pipe
B
A
Gas pipe
Indoor
HR1
Unit
Liquid pipe
*
6
*
7 8
7.25kW
(24kBtu/h)