6
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB=20
µ
Pa
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27
:
Wet-bulb temperature 19
:
48
SPL(dB(A))
LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20
:
Wet-bulb temperature 15.5
:
MSZ-GA50VA
MSZ-GA60VA
MSZ-GA71VA
MSZ-GA80VA
Fuse
Vane motor
Varistor
Terminal block
(F11)
(MV1/ MV2)
(NR11)
(TB)
T3.15AL 250V
MP20/MP20
ERZV14D471
4P
Specifications and rating conditions of main electric parts
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB=20
µ
Pa
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27
:
Wet-bulb temperature 19
:
54
SPL(dB(A))
LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20
:
Wet-bulb temperature 15.5
:
INDOORUNIT
WALL
MICROPHONE
0.8m
1m
OB419A.qxp 06.6.5 11:08 AM Page 6