Lennox MMA018SM4

78
19.2.2. Pressure (PSI)
580
507
43
5
3
62
290
217
55
65
75
Outdoor
t
57F (13.89) 47F (8.33) 37F (2.78) 27F 17F
(-2.78) (-8.33)
19.3. 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 30. Cooling Mode
Capacity Area a b c d e f
Norm Code (N) 3 2 1.5 1 .5 0
Model 6K 9K 12K 18K 24K 30K 36K
HP 0.8 1.0 1.2 1.5 2.5 3.2 4.0
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%