Datasheet

Product Data Sheet 3656 U-714
01/31/2019 page 6 of 9
3.4 Sound Data
Measurement
conditions:
Sound pressure level: 1 meter distance between microphone and the air intake.
Sound power level: Acc. to DIN 45635 part 38 (ISO 10302)Sound power level: Acc. to DIN
45635 part 38 (ISO 10302)
Measured in a semianchoic chamber with a background noise level of Lp(A) < 5 dB(A)
For further measurement conditions see chapter aerodynamics.
a.) Operation condition:
2.700 1/min at free air flow Frequency: 50 Hz
Optimal operating point 44,0 m3/h @ 18 Pa
Sound power level at the optimal operating
point
4,8 bel(A)
Sound pressure level at free air flow,
measured in rubber bands
35,0 dB(A)
b.) Operation condition:
3.200 1/min at free air flow Frequency: 60 Hz
Optimal operating point 60,0 m3/h @ 24 Pa
Sound power level at the optimal operating
point
5,3 bel(A)
Sound pressure level at free air flow,
measured in rubber bands
40,0 dB(A)
4 Environment
4.1 General
Min. permitted ambient temperature TU min.
-40 °C / 50 Hz
-40 °C / 60 Hz
Max. permitted ambient temperature TU max.
75 °C / 50 Hz
75 °C / 60 Hz
Min. permitted storage temperature TL min. -40 °C
Max. permitted storage temperature TL max. 80 °C
4.2 Climatic Requirements*)
IP-protection type (certified) IP 65 (for fan only, not for connector if applicable) **)
Humidity requirements humid temperature, cyclic; according to DIN EN
60068-2-38, 10 cycle and condensation water
check; according to DIN EN ISO 6270-2, 14 days
Salt fog requirements None
Permitted application area:
The product is for the use in partial sheltered rooms or open, roofed areas. Direct exposure to water is allowed
provided that this does not prevent the normal operation. Saline ambient conditions must be avoided.
Pollution degree 3 (according DIN EN 60664-1)
It occurs conductive pollution or dry non-conductive pollution which becomes conductive due to condensation.