Lennox MLA018S4S-1P

161
31.1. 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 83. Cooling Mode
Capacity Area a b c d e f
Norm Code (N) 3 2 1.5 1 .5 0
Model 9K 12K 18K
HP 1.0 1.2 1.5
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.