User's Manual

EN
27
Installation
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6.10 Connecting external switch
contacts
INFO The Home In and Home Out communication
connections must only be connected by a
certified specialist. The specialist also assumes
responsibility for the proper installation and
commissioning.
When using Home In and Home Out, you will require the
relevant documents for the external switch devices in
order to ensure safe device connection and operation.
The following switch contacts can be used:
Contact Function Connection
Home In Cooktop extractor on/off connection
for external switch contact (contact
closed: cooktop extractor on)
24V DC
100 mA
Home Out Electrically isolated contact for
controlling external installations
depending on the operating
status of the cooktop extractor
(cooktop extractor on: contact closed)
maximum
250 VAC
/ 30 VDC,
2,5A
Tab. 6.5 Switch contacts
INFO The Home In contact can be used for external
safety devices (e.g. window contact switches). If
the switch is open, the cooktop extractor is out of
operation.
 Make sure that the universal control unit is
disconnected from the power supply.
PKAS and PKASAB preparation
INFO To ensure that the surface of the device does
not get scratched when the cooktop extractor
system is rotated, a surface must be used that will
protect the device (e.g. cardboard).
 Place a soft layer on the surface.
 Rotate the cooktop extractor system and place it with
the top of the top side of the device on the soft layer.
 Undo the screws on the control unit on the bottom of
your cooktop extractor system.
 Lift up the cover [1].
6.8.4 Installing the additional fan
 Install the additional fan in the exhaust duct.
 Ensure that a minimum clearance of 3 m is maintained
between the fan units.
 Only use BORA universal fans with your BORA cooktop
extractor system.
6.9 Operating the cooktop extractor
with a fireplace that depends on
the air in the room
INFO The state and regional laws and regulations must
be observed with regard to the exhaust duct
design. A sufficient air supply must be ensured.
Fireplaces that depend on the air in the room (e.g. gas,
oil, wood or coal-fired heaters, continuous-flow water
heaters, instantaneous water heaters) draw in air from
the room in which they are installed and release the
exhaust fumes into the outside air via an exhaust system
(e.g. chimney).
If the cooktop extractor is used in exhaust mode, it draws
in air from the room in which it is installed as well as from
neighbouring rooms. If there is insufficient air supply, low
pressure will occur. Toxic gases could be drawn out of the
chimney or extraction ducting and back into the room.
Fig. 6.36 Exhaust air installation – not permitted
Fig. 6.37 Exhaust air installation – correct
 If simultaneously operating both a fireplace and the
cooktop extractor in the same room, ensure that:

the maximum low pressure is 4 Pa (4 x 10–5 bar);

a safety device (e.g. window contact switch, low
pressure warning device) is used to ensure that a
sufficient supply of fresh air is guaranteed;

the exhaust air is not be ducted into a chimney that
is used for exhaust gases of devices operated with
gas or other combustibles;

the installation is checked and approved by an
authorised certified engineer (e.g. heating engineer).