Lennox MMDA048S4-1P User Manual

Lennox Mini-Split Service Manual / Page 254
Capacity Request Calculation
Total capacity Request=Σ(Norm code × HP) /10×
modify rate+ correction
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 fi 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 fi nal result is integer.
In low ambient cooling mode, modify rate is fi xed as
40%.
T1 Ts
3
1
1
e
c
a
4
2
0
2
3
0
1
f
d
b
According to the fi nal capacity request to confi rm he
operating frequency, as following table.
Frequency
(Hz)
0
COOL_
F1
COOL_
F2
...
...
COOL_
15
COOL_
16
Amendatory
capacity
demand
01 2
...
...
15 16
Meanwhile the maximum running frequency will be
adjusted according to the outdoor ambient temp.
Heating Mode
Plus all the indoor capacity request together, then
multiply it by T4.
When there is only one indoor unit:
43
41
38
T4LimFre1_ADD
No limit
T4LimFre2_ADD
T4LimFre3_ADD
42
39
37
49
46
T4LimFre4_ADD
T4LimFre5_ADD
48
45
T1 Ts
4
0
a
3
1
-1
3
1
2
0
b
c
d
e
f
2

Lennox MMDA048S4-1P Specifications

General

Brand	Lennox
Model	MMDA048S4-1P
Category	Air Conditioner
Language	English