Allied 4DHV Mini-Split Series - Capacity Request Calculations

508067-01 Issue 2016 Page 39 of 75
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 24. Cooling Mode
Capacity Area a b c d e f
Norm Code (N) 3 2 1.5 1 .5 0
NOTE: The nal 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 nal result is integer.
In low ambient cooling mode, modify rate is xed as 40%.
According to the nal capacity request to conrm 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.