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Setting the Fan Speeds of the Air Curtain –
If EC fans are fitted in the air curtain there is a speed control PCB fitted inside the unit with
adjuster knobs to set the High, Medium and Low fan speeds available from the PAR-
31MAA or PAR-U02MEDA remote controller.
The speed control adjusters can be set between 0 and 10(High), check with a voltmeter to
set speed accurately. The 3 fan speeds are factory set but can be re-adjusted at
commissioning to suit the installation, both to suit the outdoor environmental conditions
and for indoor noise levels.
Factory settings are 9.5v – HIGH; 7.5v – MEDIUM; 5.5v – LOW.
Table 5 below provides guidance for setting the fan speeds.
Table 5
Fan Speed
Voltage
mounting height
10v
9.5v (High)
9v
8.5v
8v
7.5v (Medium)
7v
6.5v
6v
5.5v (Low)
5v
4.5v
See also Section, Installation; 'Wiring of Air Curtain Fan Speed' giving details of how to wire in fan speeds.
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).
T9901075-2-3 UK
Speed
Control PCB
Sound Pressure Level
Maximum
air curtain
(m)
1000
-
-
3.6
58
3.4
58
3.2
57
3.0
56
2.8
54
2.6
53
2.4
51
2.2
50
2.0
47
1.9
45
-
-
EC Fans
LOW
of air curtain
[dB(A) at 3m]
VRF HP.....DXE
1500
2000
-
-
58
59
58
59
56
58
55
57
53
55
52
54
50
52
49
51
46
47
44
45
-
-
HIGH
MEDIUM
Air Volume Flow Rate
3
(m
/h)
VRF HP.....DXE
1000
1500
-
-
1510
2560
1500
2535
1425
2400
1320
2250
1240
2120
1165
1975
1080
1835
990
1690
920
1550
835
1425
-
-
Page 26 of 38
10v
_
...
Speed
Control
Adjusters
2000
-
3025
2990
2820
2665
2500
2325
2160
1990
1825
1680
-
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