1 2 3 4 5

1
12
3
4
5
1-8 Noise Criterion Curves
MODEL : AER 425 SCLE - AER 425 SCL3E
AER 425 SHLE - AER 425 SHL3E
SOUND LEVEL : 52 dB(A), NC 44
CONDITION : Distance 1m, Height 1m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
380 - 400 - 415V, 3 Phase, 50 Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
90
80
70
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
0597_C_S
MODEL : AER 448 SCL3E
AER 448 SHL3E
SOUND LEVEL : 55 dB(A), NC 47
CONDITION : Distance 1m, Height 1m
SOURCE : 380 - 400 - 415V, 3 Phase, 50 Hz
90
80
70
60
50
40
30
20
10
Outdoor Units
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
0599_C_S
MODEL : AER 436 SCL3E
AER 436 SHL3E
SOUND LEVEL : 53 dB(A), NC 45
CONDITION : Distance 1m, Height 1m
1. Specifications
SOURCE : 380 - 400 - 415 V, 3 Phase, 50 Hz
NOTE
To evaluate “Noise level” the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select
the maximum value (vertical axis) among them.
I-94
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
90
80
70
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
CONTINUOUS
NOISE
BAND CAENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
60 125 250 500 1000 2000 4000 8000
REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values
shown in this graph because of the conditions of operation, the structure of the building, the background
noise and other factors.
2. The test results were obtained from an anechoic room.
0598_C_S