Refrigerant Piping System - LG MULTI V 5 ARUM160LTE5 Installation Manual

Refrigerant piping system

4 Outdoor Units
Example : 12 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe between Outdoor units : ARCNB41
Ⓕ : Connection branch pipe between Outdoor units : ARCNB31
Ⓖ : Connection branch pipe between Outdoor units : ARCNB21
Ⓗ : Header
Ⓘ : HR Unit
Slave 3
A4
Slave 2
A3
Slave 1
A2
Master
A1
G
F
E
A
1
D
a
D
2
b
B
C1
I1
c
H
D
3
"a"
d
C2
h
I2
D
4
f
e
6 D
5 D
- Case 1 ("a") : Maximum height is 15 m (49.2 ft) if you install with Y
branch.
- Case 2 ("b") : Maximum height is 5 m (16.4 ft) in serial connection of
HR units.
(**) Conditional Application (In case of D12 is the farthest in door)
Below condition must be satisfied for 40~90 m (131~295 ft) piping length
after first branch.
1
Diameter of pipes between first branch and the last branch should be
increased by one step, except if the pipe diameter B, C3 is same as
diameter A (main pipe diameter)
Ø 6.35 (1/4), Ø 9.52 (3/8), Ø 12.7 (1/2), Ø 15.88 (5/8), Ø 19.05 (3/4),
Ø 22.2 (7/8), Ø 25.4* (1), Ø 28.58 (1-1/8), Ø 31.8* (1-1/4), Ø 34.9 (1-3/8),
Ø 3 8.1* (1-1/2)
* : If available on site, select this pipe size.
Otherwise it doesn't need to be increased
2
While calculating total refrigerant piping length, pipe B, C3 length should
be calculated twice.
A + B x 2 + C3 x 2 + C1 + C2 + a + b + c + d + e + f + g + i + j + k + l
+ m + n ≤ 1 000 m (3281 ft)
3
Length of pipe from each indoor unit to the closest HR unit
(a, b, c, d, e, f, g, i, j, k, l, m, n) ≤ 40 m (131 ft)
4
[Length of pipe from outdoor unit to the farthest indoor unit D12
(B+C3+K)
- [Length of pipe from outdoor unit to the closest indoor unit D1 (C1+a)]
≤ 40 m (131 ft)
ODU Capacity
Master ≥ Slave1 ≥ Slave 2 ≥ Slave 3
B1
B2
C3
I3
g
i "b"
I4
D 7
k
j
H
I
sealing
x
8 D
l n
m
D 10 D D
9 11 12
Refrigerant pipe diameter from branch to branch (B,C,D)
WARNING
!
* : Serial connection of HR units : Capacity sum of indoor units ≤
192.4 kBtu/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 ≤ 10 m (33 ft),
equivalent length : max 13 m (43ft)
* If the large capacity indoor units (Over 5 HP; using over
Ø 15.88 (5/8) / Ø 9.52 (3/8)), are installed, it should be used the
Valve Group setting
Refrigerant pipe diameter from branch to branch (B,C)
Downward indoor
unit total capacity
[kW(Btu/h)]
≤ 5.6(19,100)
< 16.0 (54,600)
< 22.4 (76,400)
< 33.6(114,700)
*
< 50.4(229,000)
< 61.6(210,600)
< 72.8(210,600)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
≤ 224.0(764,400)
D
Total pipe length = A + B + C1 + C2 + C3 + a + b + c + d
+ e + f + g + i + j + k + l + m + n ≤ 1,000m (3,280ft)
Longest pipe length
L
A+B+C3+D+k ≤ 150 m (200 m**) [(492 ft(656 ft**)] A+B+C3+D+k ≤ 175 m (225 m**) [(574 ft(738 ft**)]
Longest pipe length after 1st branch
l
B+C3+D+k ≤ 40 m(90 m**) [131 ft (295 ft)]
Difference in height(Outdoor Unit ÷ Indoor Unit)
H
H ≤ 110 m (361 ft)
Difference in height (Indoor Unit ÷ Indoor Unit)
h
h ≤ 40 m (131 ft)
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1
h1 ≤ 5 m (16.4 ft)
Difference in height(HR unit ÷ HR unit)
"a", "b"
a ≤ 15 m (49 ft), b ≤ 5 m (16 ft)
- * : Assume equivalent pipe length of Y branch to be 0.5 m (1.64 ft),
that of header to be 1m (3.3 ft), calculation purpose
- It is recommended that indoor unit is installed at lower position than
the header.
- ** : To apply conditional application.
WARNING
!
When the equivalent length between a outdoor and the farthest
indoor unit is 90 m (295 ft) or more, main pipe(A) must be increased
one grade.
Gas pipe [mm(inch)]
Liquid pipe
[mm(inch)]
Low pressure
Ø 6.35(1/4) Ø 12.7(1/2)
Ø 9.52(3/8) Ø 15.88(5/8)
Ø 9.52(3/8) Ø 19.05(3/4)
Ø 9.52(3/8) Ø 22.2(7/8)
Ø 12.7(1/2) Ø 28.58(1 1/8)
Ø 15.88(5/8) Ø 28.58(1 1/8)
Ø 15.88(5/8) Ø 34.9(1 3/8)
Ø 19.05(3/4) Ø 34.9(1 3/8)
Ø 19.05(3/4) Ø 41.3(1 5/8)
Ø 22.2(7/8) Ø 44.5(1 3/4)
Ø 22.2(7/8) Ø 53.98(2 1/8)
* Equivalent pipe length
21
High pressure
Ø 9.52(3/8)
Ø 12.7(1/2)
Ø 15.88(5/8)
Ø 19.05(3/4)
Ø 22.2(7/8)
Ø 22.2(7/8)
Ø 28.58(1 1/8)
Ø 28.58(1 1/8)
Ø 34.9(1 3/8)
Ø 41.3(1 5/8)
Ø 44.5(1 3/4)