Part 2 Product data_Outdoor units
8. Capacity coefficient factor
2) Calculation of actual system capacity
①
Outdoor unit rated capacity
Q
odu(rated)
[from specification table]
②
Outdoor unit capacity at Ti, To temperature.
Q
odu(Ti, To)
[from capacity table]
③
Outdoor unit capacity coefficient factor
F
(T
i,
To)
= Q
odu(Ti, To)
/ Q
odu(rated)
④
Piping correction factor [from capacity coefficient factor table]
F
(length)
for each piping length
⑤
Individual indoor unit combinational capacity
Q
idu (combi)
= Q
odu(rated)
x Q
idu(rated)
/ Q
idu(rated-total)
⑥
Individual indoor unit actual capacity
Q
idu (actual)
= Q
odu(combi)
x F
(Ti, To)
x F
(length)
1) Rate of change in capacity due to increased piping length
9k Btu/h models
12k Btu/h models
18k Btu/h models
Piping
Length(m(ft))
Rate of change in capacity
Cooling(%) Heating(%)
7.6(25.0) 100.0 100.0
10(32.8) 97.6 98.6
15(49.2) 93.8 96.4
20(65.6) 89.9 94.1
25(82.0) 86.1 91.9
Piping
Length(m(ft))
Rate of change in capacity
Cooling(%) Heating(%)
7.6(25.0) 100.0 100.0
10(32.8) 98.6 99.6
15(49.2) 96.4 99.0
20(65.6) 94.1 98.3
25(82.0) 91.9 97.7
Piping
Length(m(ft))
Rate of change in capacity
Cooling(%) Heating(%)
7.6(25.0) 100.0 100.0
10(32.8) 98.0 99.0
15(49.2) 94.8 97.4
20(65.6) 91.6 95.8
25(82.0) 88.4 94.2
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