Loading ...
Loading ...
Loading ...
38 Outdoor Unit
Pipe connections between indoor and outdoor unit
Ú Refrigerant pipe diameter from branch to branch (B,C)
Ú Total pipe length = A+B+C+a+b+c+d+e ≤ 3280.8ft(1000m)
Longest pipe length * Equivalent pipe length
A+B+b ≤ 492ft(656ft(200m)**)
A+B+b ≤ 574ft(738ft(225m)**)
Longest pipe length after 1st branch
B+b ≤ 131ft(40m)(295ft(90m)**)
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 361ft(110m)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 49ft(15m)
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 16ft(5m)
L
l
H
h
h1
• * :
Assume equivalent pipe length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation purpose
• It is recommended that indoor unit is installed at lower position than the header.
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4(172,000) Ø12.7(1/2) Ø28.58(1
1
/8 )
< 67.2(229,400) Ø15.88(5/8) Ø28.58(1
1
/8 )
< 72.8(248.500) Ø15.88(5/8) Ø34.9(1
3
/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(1
3
/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(1
5
/8)
< 184.8(630,700) Ø22.2(7/8) Ø44.5(1
3
/4)
< 224.0(764,400) Ø22.2(7/8) Ø53.98(2)
Liquid pipe
[inch(mm)
Gas pipe
[inch(mm)
h If available on site, it use this size. Otherwise it can't be increased.
WARNING
If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.
Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit
Total capacity
[kW (Btu/h)
Standard Pipe Diameter
Conditional application
(more than 90m from ODU to IDU)
Liquid pipe
[mm (inch)]
Gas pipe
[mm (inch)]
Liquid pipe
[mm (inch)]
Gas pipe
[mm (inch)]
16.0~22.4(54,600~76,400)
Φ9.52(3/8)
Φ19.05(3/4)
Φ12.7(1/2)
Φ22.2(7/8)
28.0(95,900)
Φ22.2(7/8) Φ25.4(1)
33.6~44.8(172,000~152,900)
Φ12.7(1/2)
Φ28.58(1 1/8)
Φ15.88(5/8)
Φ28.58(1 1/8)
50.4~61.6(172,000~210,600)
Φ15.88(5/8) Φ19.05(3/4)
Φ31.8(1 1/4)
67.2(229,400)
Φ34.9(1 3/8)
Φ34.9(1 3/8)
72.8~95.2(248,500~324,900)
Φ19.05(3/4) Φ22.2(7/8)
Φ38.1(1 1/2)
100.8~168.0(344,000~573,300)
Φ41.3(1 5/8) Φ41.3(1 5/8)
173.6~179.2(592,500~611,600)
Φ22.2(7/8)
Φ44.5(1 3/4)
Φ25.4(1)
Φ53.98(2)
184.8~224.0(630,700~764,400)
Φ53.98(2)
Loading ...
Loading ...
Loading ...