LG Multi V Water 5 Manual page 279

Installation of Outside Unit
4. Refrigerant Piping System
4.3 Branch pattern for Heat Recovery System
Pattern 1
• Impossible installation
: Head branch pipe → HR unit
Outdoor unit
Outside unit
B
HR1 HR2
3
1 2
48k 48k
48k 48k
Pattern 3
HR1
1 2 3 4
54k 54k 54k 54k
Pattern 7
A
HR1
1 2
48k 48k
Connective Capacity Limit
• The maximum total capacity of each branch
pipe of HR unit is 17.5kW(60 kBtu/h).
• If a indoor unit capacity over that, two
neighboring outlets of one HR unit should be
linked by Y branch pipe and connected to
one indoor unit.
(Large capacity(76kBtu/h and 96kBtu/h unit)
• The maximum total capacity of indoor units
is 69.5kW(230 kBtu/h).
• * : Serial connection of HR units
: Capacity sum of indoor units ≤ 230 kBtu/h
: Maximum indoor units per a branch are 8 indoor units
Pattern 2
• Impossible installation
: HR unit → Y Branch and Header
→ Y Branch after Header
HR1
B
1 2 3
4
7k 7k 7k
Pattern 4
HR1
B
1 2 3 4
15k 15k 15k 15k
*
HR2 HR3
3 4 5 6
54k 54k 54k 54k
Symbols
Indoor Unit
Piping of HR unit
• Pipe installation from outdoor units to HR units
• Pipe installation from HR units to indoor units
Outdoor
Unit
A
※ This figure is representative. Actual appearance of unit may be
4 5 6 7
different by product type, but schematic diagram will stay same.
7k 7k 24k 24k
Pattern 5
A
HR1
1 2 3
48k 48k 48k
Pattern 8
A
HR1
1
48k
Installation Example
1) under 40m(131ft)
Indoor
Y branch
Unit
Keep the sum of indoor capacity under 69.5kW(230 kBtu/h).
1) under 40m(131ft)
Indoor Indoor Indoor Indoor
Unit Unit Unit Unit
Keep the sum of indoor capacity under 69.5kW(230 kBtu/h).
9
Installation
Y Branch pipe Header Branch pipe
1
A
: 3 pipes
(Low pressure Gas pipe, High pressure Gas pipe, Liquid pipe)
: 2 pipes
(Gas pipe, Liquid pipe)
Low pressure Gas pipe Gas pipe
High pressure Gas pipe
HR1
Liquid pipe Liquid pipe
Pattern 6
HR1
A
HR2
B
4 1 2 3
48k 24k 24k 12k
HR2
A
B
2
3 4 5 6 7
48k
12k 12k 12k 12k 24k
Indoor Indoor Indoor
Unit Unit Unit
Indoor Indoor Indoor Indoor
Unit Unit Unit Unit
B
Indoor
Unit
A
A
4 5
12k 24k
*
8
24k