Fujitsu Airstage J-II - Page 39

1) Equation for capacity calculation of outdoor unit.
(X
1
, Y
1
)
(X
2
, Y
2
)
(X, Y)
x
y
i) Refer to 4. CAPACIYY TABLE
(OUTDOOR UNIT) to nd Y
1
and Y
2
using X
1
and X
2
.
ii) Calculate capacity of outdoor unit using
following equation:
Y=(Y
2
-Y
1
) / (X
2
-X
1
)

(X-X
1
) + Y
1
Capacity ratio of indoor units to outdoor unit, X (%)
Capacity of outdoor unit, Y (kW )
2) Cooling capacity table of 6HP outdoor units: AJ

A54LALH
Total rated
cooling capacity
of indoor unit
Outdoor
temperature
Indoor temperature
20°CDB / 15 °CWB 27°CDB / 19 °CWB 28°CDB / 20 °CWB 30°CDB / 22 °CWB 32°CDB / 23 °CWB
(°CDB) TC IP TC IP TC IP TC IP TC IP
16.8
(110%)
10
11. 2 2.04 17.1 3.03 18.5 3.27 19.7 3.41 20.1 3.43
.
. . . . . . . . . .
.
. . . . . . . . . .
35
11. 2 2.98 16.5 4.79 16.8 4.83 17.5 4.90 17.9 4.94
.
. . . . . . . . . .
46
11. 2 4.05 12.3 4.50 12.5 4.50 13.0 4.50 13.3 4.50
15.4
(100%)
10
10.2 1.87 15.5 2.77 16.8 2.99 19.2 3.38 19.6 3.40
.
. . . . . . . . . .
.
. . . . . . . . . .
35
10.2 2.66 15.5 4.49 16.4 4.79 17.1 4.86 17.5 4.90
.
. . . . . . . . . .
46
10.2 3.60 12.2 4.50 12.4 4.50 12.9 4.50 13.1 4.50
Capacity ratio of indoor units to outdoor unit X1 = 100 % X = 100.6 % X2 = 110 %
Capacity of outdoor units (kW) Y1 = 16.4 Y Y2 = 16.8
Y= (16.8-16.4) / (110-100)

(100.6-100) + 16.4 =
16.4 (kW)
Fig.2 Method for calculation of capacity of outdoor unit from capacity tables
X
2
Y
2
X
1
Y
1
- (02 - 12) -
MODEL SELECTION MODEL SELECTION