HR M
ANUAL
O
PERATION
OF
THE
BUILDING
MANAGEMENT
SYSTEM
(BMS)
Manual version 3.0 (10-10-2017)
en-49
en
422
(
0.3
)
Manual setting of the strength
In the manual mode, the strength can be set manually.
Note:
n
For minimum energy consumption, Biddle
recommends selecting the lowest strength at which
the desired air quality is achieved.
4.1.3 Automatic operation
The unit can only be controlled automatically if the functions
below have been set as follows:
4.1.4 Automatic CO
2
control
The unit automatically adjusts the fan speed (and any recircula-
tion damper) to the CO
2
level.
The CO
2
level is supplied by the building management system
(BMS) or, if this information is not available, by a CO
2
sensor
(accessory) on X377 (via connection X3).
Fan speeds with stepped controls
VALUE
FAN
SPEED
0
0%
1 - 49
35%
50 - 79
65%
80 - 100
95%
REGISTER
ADDRESS
DESCRIPTION
VALUE
275
(
1
)
Select modes
2 = allowed: automatic
3 = allowed: manual, automatic
425
(
0.6
)
Automatic or manual control
1 = automatic
CO
2LEVEL
FAN
SPEED
< 1
without recirculation module
0 (off)
with recirculation module
1
< 2
1
< 3
2
> 3
3