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If the ventilation unit is
NOTICE
installed with a hydraulic re-
heating register (ZU) in a
passive energy house, a
thermostat (TH 10) has to be
installed to protect against
supply air that is too cold.
Furthermore, suitable outside
air pre-heating is vitally
important, in order to ensure
continuous operation.
● With an optional smoke switch (safety
device), the presence of smoke can be
identified early and its spread within
residential units through the ventilation
system can be prevented.
● Brine earth heat exchanger
● Frost protection equipment: Air that is
flowing into the ventilation unit must be pre-
heated, in order to ensure continuous
operation. Pre-heating can be done
electrically, water-based or through an
earth heat exchanger, see recommended
accessories in Chapter 11.
An energy-optimised frost protection
i
for the ventilation unit can be ensured
through earth heat exchangers and
a contribution can be made to the
supply of heat at cold, external
temperatures.
In summer, the earth heat exchanger
provides a certain cooling function
and dehumidifying of the outside air.
Earth heat exchangers must be
planned carefully in respect of energy
efficiency and air hygiene. Attention
must be paid to good cleanability and
a suitable filter concept and provision
must be made for a service opening.
● The ventilation unit can also be operated
together with KNX/EIB bus components,
e.g. with fan coil actuators or operating
panels from the corresponding KNX
supplier. Further KNX/EIB modules can be
integrated in the system bus without
problem, e.g. CO
and motion detectors.
sensors, timer switches
2
3.2.2 Connection options for room air
controls and sensors
Damage to the unit. Never ope-
NOTICE
rate an RFS together with a CO
or VOC sensor.
Connection of a CO
i
sensors only permitted with 1x room
air control RB-D1-ZF4 or RB-ZF4.
Room air control RB-ZF4 combinable with
● up to 4 further RB-ZF4 or 1x CO
or 1x VOC-sensor or several RFS h
controls.
Room air control RB-D1-ZF4 combinable
● with 1x CO
-Sensor or 1x VOC-Sensor or
2
several RFS h
umidity controls.
RB-D1-ZF4 not combinable with
i
RB-ZF4-contol.
3.2.3 Room air control RB-ZF4
With step switch and filter monitoring.
Operating modes Function
Standby mode
Ventilation level 1/
Interval operation
Ventilation level 1/
Continuous opera-
tion
Ventilation level 2
Ventilation level 3
The off function can be deactivated at
i
the room air control RB-ZF4.
This setting is useful, for example, in
buildings open to the public to avoid
the ventilation unit being switched off
without authorisation. The deactiva-
tion should only be carried out by a
specialist installer.
-/VOC-/RFS-
2
-sensor
2
umidity
Ventilation off
Ventilation for
humidity protection
Reduced ventilation
Nominal ventilation
Intensive ventilation
2
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