3. Installation of outdoor unit
53
_ Heat pump
50Hz/R410A
Part 3 Design and installation
L
7
L
1
L
2
L
3
L
4
L
5
L
6
A
h2
B
h3
Main piping
Branch piping
R
Installation of the outdoor unit is at higher
elevation than the indoor units.
h1
BD unit
BD unit
[Unit : m]
Phase
Capacity
(kBtu/h)
Total
Length
Standard
Main Pipe
Length
(A+B)
Max. Main
Pipe Length
(A+B)
Total Branch
Pipe Length
(L1+…+L7)
Standard
Branch Pipe
Length
(L1,L2…,L7)
Max.
Branch
Pipe Length
Max. Elevation
ODU ~ IDU(h1) IDU ~ IDU (h2)
BD~IDU(h3)
1Ø
40
100
5
50
50
5
15
30
15
10
48
135
5
55
80
5
15
30
15
10
56
145
5
55
90
5
15
30
15
10
3Ø
42
125
5
55
70
5
15
30
15
10
48
135
5
55
80
5
15
30
15
10
56
145
5
55
90
5
15
30
15
10
