Installation Manual
33
ENGLISH
Refrigerant piping installation
HR1
48k
48k
48k
48k
1
2
3
4
HR1
36k
36k
A
A
1
1
2
A
HR2
36k
36k
3
4
HR1
15m(49ft)
12k
12k
24k
24k
1
2
3
4
HR2
48k
48k
48k
12k
5
6
7
8
HR1
12k
12k
24k
24k
1
2
3
4
HR2
48k
48k
48k
12k
5
6
7
8
Prohibited pattern
Prohibited pattern
Pattern
Indoor unit
• Capacity sum of indoor units is over 160kBtu/hr.
• Distance between neighboring HR unit is over 10m,
and Capacity sum of indoor units is over 160kBtu/hr.
Y Branch pipe
Pattern
HR
Unit
Outdoor
Unit
Indoor
Unit
Low pressure Gas pipe
High pressure Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
➲
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)
≤
1000m(3280ft)
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(492ft)(200m(656ft))(*))
A+B+C3+D+K
≤
175m(574ft)(225m(738ft))(*))
HR Unit ~ neighboring HR Unit
D
≤
10m(33ft)
First indoor branch ~ the farthest indoor unit
B+C3+D+k
≤
90m(295ft)(*)
First outdoor branch ~ the farthest outdoor unit
E+F3
≤
10m(33ft)
Difference in height (outdoor unit
↔
indoor unit)
H
≤
100m(328ft)
Difference in height (indoor ~ indoor unit)
H
≤
15m(49ft)
Piping length from each indoor unit to the closest HR Unit
a,b,c,d,e,f,g, i, j, k
≤
40m(131ft)
E1
~
D10
C3
~
C4
B1
~
D10
E1
~
A3
H
h
g, I, j, k
CAUTION
• Assume equivalent pipe
length of Y branch to be
0.5m(1.6ft), calculation
purpose.
CAUTION:
• Should not be exceed
10m(33ft) between
neighboring HR unit.
• Serial connection of
HR units : Capacity
sum of indoor units
≤
160kBtu/hr.