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Setting the Fan Speeds of the Air Curtain – (HX2-M DXE)
TORIN EC fans are fitted in the HX2-M DXE air curtain (standard specification). 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-F27MEA 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; 7v – MEDIUM; 5v – LOW.
Table 5 below provides guidance for setting the fan speeds.
Table 5
Maximum air
Fan Speed
curtain mounting
Voltage
10v
9.5v (High)
9v
8.5v
8v
7.5v
7v (Medium)
6.5v
6v
5.5v
5v (Low)
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).
T9901105-1-1 UK
Speed
Control PCB
Sound Pressure Level
height
(m)
1000
-
-
3.5
54
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.9
-
-
LOW
of air curtain
[dB(A) at 3m]
HX2-M ..... DXE
1500
2000
2500
-
-
-
55
56
56
55
55
54
54
53
53
52
52
51
51
50
50
49
49
48
48
47
47
-
-
-
HIGH
MEDIUM
Air Volume Flow Rate
3
(m
/h)
HX2-M ..... DXE
1000
1500
-
-
1510
2380
-
-
Page 26 of 42
_
10v
...
Speed
Control
Adjusters
2000
2500
-
-
3000
3750
2950
3650
2780
3460
2520
3290
2380
3070
2200
2890
2040
2690
1900
2470
1750
2260
1590
2070
-
-
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