ENGLISH
Installation Manual 33
➲ Refrigerant pipe diameter between branches and HR units (B,C,D)
➲ Total pipe length (A+B+C1+C2+C3+D+a+b+c+d+e+f+g+i+j+k) ≤ 300m
Downward indoor unit total capacity
[kW(Btu/h)]
≤ 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 (112,600) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
< 47 (160,400) Ø12.7(1/2) Ø28.58(1
1
/8) Ø22.2(7/8)
< 71 (242,300) Ø15.88(5/8) Ø28.58(1
1
/8) Ø28.58(1
1
/8)
< 104 (354,900) Ø19.05(3/4) Ø34.9(1
3
/8) Ø28.58(1
1
/8)
104 (354,900) ≤ Ø19.05(3/4) Ø41.3(1
5
/8) Ø28.58(1
1
/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
Outdoor unit ~ the farthest indoor unit Equivalent pipe length
A+B+C3+D+K ≤ 150m A+B+C3+D+K ≤ 175m
First indoor branch ~ the farthest indoor unit
B+C3+D+k ≤ 40m
First outdoor branch ~ the farthest outdoor unit
E+F3 ≤ 10m
Difference in height (outdoor unit → indoor unit)
H ≤ 50m
Difference in height (indoor ~ indoor unit)
H ≤ 15m
Piping length from each indoor unit to the closest HR Unit
a,b,c,d,e,f,g, i, j, k ≤ 40m
E1 ~
D10
B1
~
D10
E1 ~
A3
H
h
g,I,j,k
CAUTION
• Assume equivalent pipe
length of Y branch to be 0.5m,
calculation purpose.
CAUTION:
• Should not be exceed 10m
between neighboring HR unit.
• Serial connection of HR units :
Capacity sum of indoor units ≤
160kBtu/h.
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