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