Fujitsu AJ 126LELDH Series Design & Technical Manual page 36

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 8 HP outdoor units: AJ072LELDH
Outdoor
Total rated
temperature
cooling capacity
of indoor unit
(°CDB)
26.8
(120%)
X2
24.6
(110%)
X1
Capacity ratio of indoor units to outdoor unit (%)
Capacity of outdoor units (kW)
Y = (25.9 -25.4)/(120 - 110) × (117.4 - 110) + 25.4 = 25.8 kW
1-3. Capacity calculation method
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 15.5 2.65
. . .
. . .
35 15.5 3.93
. . .
46 15.5 5.94
-15 14.2 2.44
. . .
. . .
35 14.2 3.61
. . .
46 14.2 5.22
(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
26.9 4.52 29.2 4.89
. . .
. . .
25.4 7.67 25.9 7.73
. . .
Y2
18.4 6.67 6.67
24.6 4.15 26.7 4.49
. . .
. . .
24.6 7.48 25.4 7.67
. . .
Y1
18.2 6.72 46.6 6.72
X = 110
1
Y = 25.4
1
- (02-8) -
x
) × (X - X ) + Y
1 1 1
1
30°CDB / 22 °CWB 32°CDB / 23 °CWB
IP TC IP TC
31.8 5.15 32.5
. . .
. . .
27.0 7.86 27.6
. . .
19.5 6.67 19.9
30.9 5.17 31.6
. . .
. . .
26.4 7.79 27.0
. . .
19.3 6.72 19.7
X
X = 117.4
Y
Y
1. Model selection and capacity calculation
and Y
2
IP
5.13
. .
. .
7.93
. .
6.67
5.15
. .
. .
7.86
. .
6.72
= 120
2
= 25.9
2