Fujitsu AJ 126LELDH Series Design & Technical Manual page 38

• Decision of system capacity
No Item
C-1 System capacity
• Calculation of actual capacity of each indoor unit
Item
Actual capacity of each
indoor unit
Calculation method of outdoor unit capacity from capacity tables
Equation for outdoor unit capacity calculation: Y = (Y
NOTE: Refer to "Cooling capacity table (Outdoor unit)"
using values of X
• Calculation example of 10 HP outdoor units: AJ090LELDH
Outdoor
Total rated
temperature
cooling capacity
of indoor unit
(°CDB)
30.8
(110%)
X2
28.0
(100%)
X1
Capacity ratio of indoor units to outdoor unit (%)
Capacity of outdoor units (kW)
Y = (29.3 - 28.6)/(110 - 100) × (104.3 - 100) + 28.6 = 28.9 kW
1-3. Capacity calculation method
1 2
kW 8.0 8.0
y
(X1, Y1)
Capacity ratio of indoor units to outdoor unit, X (%)
and X .
1 2
18°CDB / 14 °CWB 27°CDB / 19 °CWB
TC IP
-15 17.7 3.88
. . .
. . .
35 17.7 5.07
. . .
46 17.7 6.67
-15 16.1 3.54
. . .
. . .
35 16.1 4.63
. . .
46 16.1 5.92
Value
26.0
Room
3 4 5
8.0 1.0 1.0
(X2, Y2)
(X, Y)
- Y )/(X - X
2 1 2
on page 02-75 to find values of Y
Indoor temperature
28°CDB / 20 °CWB
TC IP TC
30.8 6.62 33.4 7.17
. . .
. . .
28.7 8.63 29.3 8.67
. . .
Y2
20.0 6.70 6.70
28.0 6.03 30.4 6.53
. . .
. . .
28.0 8.59 28.6 8.63
. . .
Y1
19.7 6.73 46.6 6.73
X = 100
1
Y = 28.6
1
- (02-10) -
Remark
Smaller value of (A-8) and (B-6)
Remark
(C-1) × (A-3)/(A-7)
x
) × (X - X ) + Y
1 1 1
1
30°CDB / 22 °CWB 32°CDB / 23 °CWB
IP TC IP TC
35.1 7.17 35.9
. . .
. . .
30.6 8.74 31.3
. . .
21.4 6.70 21.8
34.0 7.18 34.8
. . .
. . .
29.9 8.70 30.5
. . .
21.1 6.73 21.5
X
X = 104.3
Y
Y
1. Model selection and capacity calculation
and Y
2
IP
7.16
. .
. .
8.78
. .
6.70
7.17
. .
. .
8.73
. .
6.73
= 110
2
= 29.3
2