35
16.3. Capacity Request Calculations
Total capacity Request=Σ(Norm code × HP) /10× modify rate+ correction.
T1 Ts
3
1
1
e
c
a
4
2
0
2
3
0
1
f
d
b
Figure 25. Cooling Mode
Capacity Area
a
b
c
d
e
f
Norm Code (N)
3
2
1.5
1
.5
0
NOTE:
The final result is integer.
Plus all the indoor capacity request together, then modify it by T4.
When there is only one indoor unit:
Outdoor Temperature (T4)
Cooling
>29°C
18°C to 29°C
<17°C
>84.2°F
64.4°F to 84.2°F
<62.6°F
Modify Rate
100%
60%
40%
When there is more than one indoor unit:
Outdoor Temperature (T4)
Cooling
>25°C
17°C - 25°C
<17°C
>77°F
62.6°F - 77°F
<62.6°F
Modify Rate
100%
80%
40%
NOTE:
The final result is integer.
In low ambient cooling mode, modify rate is fixed as 40%.
According to the final capacity request to confirm he operating frequency, as following table.
Frequency (Hz)
0
COOL_
F1
COOL_
F2
...
...
COOL_
15
COOL_
16
Amendatory capacity
demand
0
1
2
...
...
15
16
Meanwhile the maximum running frequency will be adjusted according to the outdoor ambient temp.
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