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User selection 1
It is possible to override the unit's functions via an external signal from a potential free contact.
The User selection function can be used for many purposes, e.g. in the case of a wood burning stove or open fire. Initial settings of the
ventilation system should be set up with a slight underpressure, so that humidity in the air is not forced into the building elements. This
is of course a disadvantage when lighting a wood burning stove, as smoke will enter the room. You can use a dry contact to configure
one of Fan stages (e.g. fan stage 4) to run with a slight over-pressure instead, to push the smoke through the chimney as intended.
Connection to CTS700 control system:
User selection 1 is programmed in the unit's software under General settings. See the options in the Software instructions.
User selection 2
As with User selection 1, it is also possible with User selection 2 to override the unit's functions via an external signal from a potential
free contact. The difference is that by activating User selection 2, the control system also transmits an output signal.
User selection 2 has the higher priority and is therefore used for cooker hood operation if a cooker hood is connected to the ventilation
system. Normally fan speeds 3 or 4 are set for cooker hood operation. The output signal can be used for connecting an EM box or exter-
nal damper which is to assume a particular setting during cooker hood operation.
There are many other uses for User selection 2 which we shall not discuss further in these instructions.
Connection to CTS700 control system:
Potential free contact
Output signal
(230V)
Potential free contact
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