● The ventilation unit has four Ø 125 mm
duct connections. For suitable plug
connectors with lip seal or pipe elbow
AEREX catalogue or internet.
● ¾" condensate discharge outlet, sleeve with
28 mm diameter lip seal. For connecting a
drain hose. The condensate discharge must
run into a siphon as otherwise unwanted air
is sucked into the ventilation unit through the
drain line, see also Chapter 6.4.
4.2 Room air controls
4.2.1 RB-ZF4 room air control
Standard room air control for
● RB 170 standard unit
● RB 170 comfort unit
For detailed information, see RB 170
operating and maintenance instructions.
4.2.2 Digital RB-D1-ZF4
room air control
Standard room air control for
● RB 170 bypass unit
For detailed information, see operating
instructions in separate packaging unit.
The RB-D1-ZF4 can also be combined with
the standard or comfort unit.
4.2.3 Maximum number of controls and
sensors
Damage to the unit.
NOTICE
Never operate an RFS together
with a CO
Connection of a CO
sensor only permitted with one room
air control.
Room air control RB-ZF4 combinable with
● up to 4 further RB-ZF4 or 1x CO
or 1x VOC-sensor or RFS 1x h
control.
Room air control RB-D1-ZF4 combinable
● with 1x CO
-Sensor or 1x VOC-Sensor or
2
1x RFS h
umidity control
RB-D1-ZF4 not combinable with
RB-ZF4-contol.
or VOC sensor.
2
/VOC/RFS-
2
-sensor
2
umidity
.
4. System components │ uk
4.3 CO
sensor (SKD) / VOC sensor
2
(EAQ 10/2 air quality sensor)
Also refer to connection option 4 in Chap. 6.11.
CO
sensor for registering carbon dioxide.
2
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 quality.
2
The ventilation unit only reacts to the CO
sensor if ventilation level 2 (nominal venti-
lation) is selected on the RB-ZF4 or RB-D1-
ZF4 room air control.
VOC sensor (EAQ 10/2 Air quality sensor)
for controlling the fans according to the air
quality. The ventilation unit only reacts to the
VOC sensor if ventilation level 2 (nominal
ventilation) is selected at the (RB-ZF4 or
RB-D1-ZF4) room air control.
CO
and VOC sensor: The ventilation unit
2
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.
CO
and VOC switching points are perma-
2
nently stored in the control.
Switching points
control
< 2.5 V
Level 2 to
level 1
< 5 V
Level 3 to
level 2
> 5 V
Level 1 to
level 2
> 7.5 V
Level 2 to
level 3
To the control circuit board may be
connected only with
● one CO
sensor or
2
● one VOC sensor or
● several FS-T4 hygrostats.
Never operate a CO
with a VOC sensor.
2
Output voltage
sensor
2.5 V at 900 ppm
5 V at 1,000 ppm
5 V at 1,000 ppm
7.5 V at 1,100 ppm
sensor together
2
43