Fujitsu AIRSTAGE J-IIIL - Page 30

Calculation method of outdoor unit capacity from capacity tables
(X, Y)
(X, Y)
(X, Y)
x
y
Capacity ratio of indoor units to outdoor unit, X (%)
Capacity of outdoor unit, Y (kBtu/h)
Equation for outdoor unit capacity calculation: Y = (Y
2
- Y
1
)/(X
2
- X
1
) × (X - X
1
) + Y
1
NOTE: Refer to "Cooling capacity table (Outdoor unit)
" on page 02-54 to find values of Y
1
and Y
2
using values of X
1
and X
2
.
• Calculation example of 6 Ton outdoor units: AOU72RLAVL
115 59.6 6.68 73.3 8.35 74.1 8.35 77.3 8.35 78.1 8.35
95 59.6 4.29 86.3 7.21 87.4 7.24 91.5 7.35 92.6 7.38
93.6 (130%)
5
59.6 3.11 93.6 4.58 97.9 4.76 108.9 5.10 110.3 5.10
•
115 55.1 5.94 72.1 8.35 72.9 8.35 76.1 8.35 76.9 8.35
•
9
5 55.1 3.98 84.7 7.16 85.6 7.19 89.7 7.30 90.7 7.33
86.4 (120%)
5
55.1 2.91 86.4 4.27 90.3 4.44 106.0 5.12 107.4 5.11
•
Cooling capacity at rated condition: 72 kBtu/h (6 ton)
Total rated
capacity of
indoor unit
Outdoor
temperature
Indoor temperature
68°FDB/59°FWB 80°FDB/67°FWB 82°FDB/68°FWB 86°FDB/72°FWB 90°FDB/73°FWB
°FDB TC IP TC IP TC IP TC IP TC IP
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Y!
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X"
Capacity ratio of indoor units to outdoor unit (%)
X
1
= 120
X = 123.6
X
2
= 130
Capacity of outdoor units (kBtu/h)
Y
1
= 85.6
Y
Y
2
= 87.4
Y = (87.4 - 85.6)/(130 - 120) × (123.6 - 120) + 85.6 = 86.2 kBtu/h
1-3. Capacity calculation method - (02-8) - 1. Model selection and capacity calculation
MODEL SELECTION MODEL SELECTION