Loading ...
Loading ...
Loading ...
Refrigerant pipe diameter from branch to branch (B,C)
• * : Assume equivalent pipe length of Y branch to be 1.64ft, that of header to be 3.3ft,
calculation purpose
• it is recommended that indoor unit is installed at lower position than the header.
• ** : Conditional application
L
Longest pipe length *Equivalent pipe length
A+B+C3+k ≤150m(200m**)
[(492ft(656ft**)]
A+B+C3+k ≤175m(225m**)
[(574ft(738ft**)]
l
Longest pipe length after 1st branch
B+C+D+e ≤ 40m(90m**) [131ft(295ft)]
H
Difference in height (Outdoor Unit ÷ Indoor Unit)
H ≤ 110m(361ft)
h
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 40m(131ft)
h1
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 5m(16.4ft)
"a", "b"
Difference in height(HR unit ÷ HR unit)
a ≤ 15m(49ft) , b ≤ 5m(16ft)
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 ≤ 10m(33ft), equivalent length : max
13m(43ft) (for 14HP or more)
* If the large capacity indoor units (Over 5 HP; using over Ø15.88(5/8)/9.52(3/8) are installed,
it should be used the Valve Group setting
!
42
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
Downward indoor unit total
capacity [kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe [mm(inch)]
Low pressure High pressure
≤ 5.6(19,100)
Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8)
< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2)
≤ 22.4(76,400)
Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
< 50.4(229,000) Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)
< 67.2(229,400) Ø15.88(5/8) Ø28.58(1-1/8) Ø22.2(7/8)
< 72.8(210,600) Ø15.88(5/8) Ø34.9(1-3/8) Ø28.58(1-1/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(1-3/8) Ø28.58(1-1/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(1-5/8) Ø34.9(1-3/8)
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)
Loading ...
Loading ...
Loading ...