Fujitsu AOU48RLXFZ Design & Technical Manual page 160

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