Design and Technical Manual

6. SYSTEM DESIGN
Example 7 (Not good)
z
Outdoor unit
Indoor unit 1
Branch box 1
(Primary type)
Branch box 2
(Secondary type)
Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7
Branch box 3
(Secondary type)
Model
Capacity
(Btu/h)
Total
capacity
(Btu/h)
Connectable indoor
unit capacity (Btu/h) Judgement
Min. Max.
Outdoor unit AOU48 48000 48000

80%
38400

130%
62400

<

62400 < 66000 → Not good
Indoor unit 1 ARU12 12000

66000
Indoor unit 2 ARU9 9000
Indoor unit 3 ARU9 9000
Indoor unit 4 ARU9 9000
Indoor unit 5 ARU9 9000
Indoor unit 6 ARU9 9000
Indoor unit 7 ARU9 9000
Branch box 1
UTP-PU03A
-
-
- -
-
Branch box 2
UTP-PU03B
-
-
- -
-
Branch box 3
UTP-PU03B
-
-
- -
-
Example 8 (Not good)
z
Branch box 1
(Primary type)
Branch box 2
(Secondary type)
Branch box 3
(Secondary type)
Outdoor unit
Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 Indoor unit 9
Model
Capacity
(Btu/h)
Total
capacity
(Btu/h)
Connectable indoor
unit capacity (Btu/h) Judgement
Min. Max.
Outdoor unit AOU48 48000 48000

80%
38400

130%
62400
Not good → Because nine indoor
units are connected
Indoor unit 1 ASU7 7000

63000
Indoor unit 2 ASU7 7000
Indoor unit 3 ASU7 7000
Indoor unit 4 ASU7 7000
Indoor unit 5 ASU7 7000
Indoor unit 6 ASU7 7000
Indoor unit 7 ASU7 7000
Indoor unit 8 ASU7 7000
Indoor unit 9 ASU7 7000
Branch box 1
UTP-PU03A
-
-
- -
-
Branch box 2
UTP-PU03B
-
-
- -
-
Branch box 3
UTP-PU03B
-
-
- -
-
Capacity ratio
138%
- (06 - 06) -
SYSTEM DESIGN SYSTEM DESIGN