T9901120-1-2 UK
Page | 13
Table 4
Factory settings for the 3 fan speeds are shown in Table 4 below:
Fan Speed
Maximum air
velocity at
outlet grille
(m/s)
Maximum air
curtain mounting
height
(m)
Sound Pressure
Level of air
curtain
[dB(A) at 3m]
Air Volume
Flow Rate
(m
3
/h)
[for E & A]
HIGH
(black wire)
9.0
3.0
(2.5m exposed)
C2-1000 - 50
C2-1500 - 50
C2-2000 - 51
C2-2500 - 52
1250
1800
2500
3050
MEDIUM
(blue wire)
7.0
–
C2-1000 - 48
C2-1500 - 48
C2-2000 - 49
C2-2500 - 50
1140
1640
2275
2775
LOW
(red wire)
5.0
–
C2-1000 - 46
C2-1500 - 46
C2-2000 - 47
C2-2500 - 48
1025
1475
2050
2500
Sound pressure levels dB(A) at 3m distance are for a single air curtain mounted at its maximum mounting height, operating in a
room with average acoustic characteristics as defined in CIBSE Guide B5 (reverberation time 0.7s at 1kHz) and a room size
equivalent to 8 air changes per hour (ac/h). Care needs to be taken when selecting air curtains for an installation as noise
levels can be several dB higher if the mounting height is reduced, if the room is more ‘live’ (i.e. hard surfaces, no furnishings or
absorbent materials), if the room is smaller than 8 ac/h equivalent or a combination of these factors. Noise levels will also
increase if more than one air curtain is installed at the same doorway (e.g. +3dB(A) for 2 equal point sources: direct field).
12 Fan Speed Selection
.
(refer also to wiring diagrams in Appendix 2)
