Liquid pipe
Gas pipe
[mm(inch)]
[mm(inch)]
Ø9.52(3/8)/12.7(1/2) Ø22.2(7/8)/28.58(1-1/8)
Liquid pipe
Gas pipe
[mm(inch)]
[mm(inch)]
Ø15.88(5/8)/19.05(3/4) Ø34.9(1-3/8)/41.3(1-5/8)
Longest pipe length (Equivalent pipe length)
L
A + B + C + D + e ≤ 150m(492ft)( 175m(574ft))
Longest pipe length after 1st branching
ℓ
B + C + D + e ≤ 40m(131ft)
High/Low difference (Outside unit ÷ Indoor unit)
H
H ≤ 50m(164ft)
High/Low difference (Indoor unit ÷ Indoor unit)
h
h ≤ 15m(49ft)
High/Low difference (Outside unit ÷ Outside unit)
h1
h ≤ 2m(6.6ft)
Low/high pressure
common pipe
Ø19.05(3/4)
Low/high pressure
common pipe
Ø19.05(3/4)
Outside unit capacity Liquid pipe[mm(inch)] Gas pipe [mm(inch)]
40,48,50,60HP
Ø19.05(3/4)
Total capacity of indoor units connected
to after branching [kW(Btu/h]
≤ 5.6(19,100)
<16(54,600)
≤ 22.4(76,400)
< 33(112,600)
< 47(160,400)
< 71(242,300)
< 104(354,900)
104(354,900) ≤
Ø41.3(1-5/8)
Liquid pipe
Gas pipe
[mm(inch)]
[mm(inch)]
Ø6.35(1/4)
Ø12.7(1/2)
Ø9.52(3/8)
Ø15.88(5/8)
Ø9.52(3/8)
Ø19.05(3/4)
Ø9.52(3/8)
Ø22.2(7/8)
Ø12.7(1/2)
Ø28.58(1-1/8)
Ø15.88(5/8) Ø28.58(1-1/8)
Ø19.05(3/4)
Ø34.9(1-3/8)
Ø19.05(3/4)
Ø41.3(1-5/8)