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