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3.2.4 Digital room air control
RB-D1-ZF4
Optional room air control for RB 300/RB 400
units. For detailed information about functions
and settings see RB-D1-ZF4 mounting and
operating instructions.
The "Plus function" can also be activated with
the RB-D1-ZF4 room air control. In summer
operation, this brings electrical power
consumption savings of approximately 50%.
Timer RESET for filter change interval
A filter change prompt is displayed
i
on the room air control every 3 months.
We recommend changing the filter
every 6 months at the latest.
Filter change is simple and
requires no tools.
Change the air filter as described in
Chapter 6.2.
To acknowledge the filter change display,
press the OK button for around
3 seconds.
56
3.2.5 CO
sensor (option)
2
Sensor for registering carbon dioxide CO
The CO
content of the air is an indicator of
2
the quality of the room air. The higher the
CO
content, the worse the room air.
2
The ventilation unit only reacts to the CO
sensor if ventilation level 2 (nominal venti-
lation) is selected at the room air control
RB-ZF4 or RB-D1-ZF4.
The ventilation unit switches between the
ventilation levels, depending on the air
quality.
● If the air quality improves, the ventilation
unit switches over to ventilation level 1.
● If the air quality worsens, the ventilation unit
switches over to ventilation level 3.
● Please refer to Chapter 9.6.5, connection
option 4 for the switching point of the CO
sensor.
3.2.6 Humidity control RFS (option)
For controlling the fans depending on the
relative humidity. The ventilation unit switches
to ventilation level 3 if the humidity value is
exceeded 75 % r.h. If the humidity in the
room drops, the ventilation unit switches back
to the previously selected ventilation level.
If you switch manually from ventilation
i
level 3 to level 2 or 1, this deactivates
the automatic function of the humidity
control temporarily. This is then
switched back to active if the level
drops below the humidity control´s
setpoint once.
.
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2
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