Mitsubishi Electric EHWT17D-MHEDW, Data Book

Page: 10 / 131

0.8 m
1 m
MICROPHONE
UNIT
GROUND
0.4 m
1 m
MICROPHONE
UNIT
WALL
10
20
30
40
50
60
70
80
90
8000 4000 2000 1000 500 250 125 63
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTRE FREQUENCIES, Hz
Ground source heat pump (GSHP)
Pump speed: 5
Flow rate: 20L/min
SPL: 30dB
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Cylinder unit
Ground source heat pump (GSHP)
Water to Water heat pump (WTW)
Hydrobox
3.5 Noise criterion curves
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTRE FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Cylinder unit
Pump speed (primary circuit): 5
Pump speed (sanitary circuit): 2
Flow rate: 20L/min
SPL: 29dB
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTRE FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Hydrobox
Pump speed: 5
Flow rate: 20L/min
SPL: 29dB
Performance data
3
B-36
Cylinder
unit/
Hydrobox/GSHP/WTW