Design and Technical Manual

6. SYSTEM DESIGN
EXAMPLE OF REFRIGERANT SYSTEM

Example 1 (OK)
z
Outdoor unit
Indoor unit 1
Branch box 1
(Primary type)
Indoor unit 2
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

≤

≤

38400 < 42000 < 62400 → OK
Indoor unit 1 ARU24 24000

42000
Indoor unit 2 ARU18 18000
Branch box 1
UTP-PU03A
-
-
- -
-
Example 2 (OK)
z
Branch box 1
(Primary type)
Outdoor unit
Indoor unit 1 Indoor unit 2 Indoor unit 3
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

≤

≤

38400 < 60000 < 62400 → OK
Indoor unit 1 ARU24 24000

60000
Indoor unit 2 ARU24 24000
Indoor unit 3 ARU12 12000
Branch box 1
UTP-PU03A
-
-
- -
-
Capacity ratio
88%
Capacity ratio
125%
- (06 - 03) -
SYSTEM DESIGN SYSTEM DESIGN