Refrigerant Piping System; Indoor Unit - LG MULTI V WATER II ARWB Serie Manual De Instalación

Refrigerant piping system

Refrigerant piping system
Example : 2 Outdoor units, 4 HR units and 10 indoor units
Ⓐ Outdoor unit
Ⓑ Y branch
Ⓒ HR unit

Ⓓ Indoor unit

■ Case 1 ("a")
: Maximum height is 15m(236ft) if you install with Y branch.
■ Case 2 ("b")
: Height is zero(0) m in HR unit serial connector.
WARNING
* : Serial connection of HR units : Capacity sum of indoor units ≤ 160kBtu/hr
• Refer to the HR unit PCB part for the valve group control setting.
• It is recommended that difference in pipe lengths between an HR unit and indoor units, for example
difference in length of a, b, c, and d, be minimized. The larger difference in pipe lengths, the more different
performance between indoor units.
• Piping length from outdoor branch to outdoor unit ≤ 10m(33ft), equivalent length : max 13m(43ft)
(For 18 HP or more)
h If the large capacity indoor units(5~10 HP, using over Ø15.88(5/8) / Ø9.52(3/8))are installed, it should use
Valve Group setting.
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Slave 2
A3
Slave 1
A2
F3
F2
E
E2
E1
D1
a
D2
b
C1
c
H
D3
d
h
D4
Master
A1
F1
A
B1
B
C1
B2
"a"
C3 D
C3
C2
g
i
"b"
D7
C2
f
e
D8
D6
D5
Refrigerant piping system
*
C4
j
k
D9
D10
Installation Manual 33