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en
I
NSTALLATION
2.8
Installing external controls
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2.8.1 Special points regarding external controls
Unit input
The unit has an input signal interface. As examples, a smoke
detector or fire alarm can be connected to this.
Connection X3 1 is suitable for input signals that are exter-
nally powered.
Caution:
c
The input is designed for controls with potential-free
contacts and must not be loaded.
Note:
n
When using the input, indicate what response must
be given to an input signal. (Via the b-touch control
panel:
menu > Configuration > 60. Function of inputs
or via the building management system: register
address 337_Alarm functions)
Unit output
The unit has an output signal interface (X3). A warning lamp
for dirty filters can be connected to this.
Caution:
c
Keep the cable length to a maximum of 3 metres.
2.8.2 Installing smoke detector or fire alarm (acces-
sory)
In emergencies, the unit can emit an alarm signal or even
actively deal with the problem by functioning in a special
mode. (See
menu > Configuration > 60. Function of
This function can be activated by the building management sys-
tem (register address 435) or by an external sensor.
If an external sensor is used:
H
EAT RECOVERY UNIT
inputs)
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