19
CV072018-1
HR Sensor
The speed of the fans will be regulated by a relative humidity (RH) sensor with 0-10V output and linear characteristic between 0 and 100% RH
(0V correspond to 0% RH and 10V correspond to 100% RH); If the external signal from the HR sensor assumes a value equal to 0V, the control
will signal an alarm. See graphs of the signal parameter ext. In this case AutoMin% corresponds to the relative humidity value for which it is
considered optimal air quality, AutoMax% corresponds to the value of relative humidity for which the air quality is considered bad. A possible
dehumidification system can be managed by this sensor or, if for example this input is occupied by CO2, by another supplementary selected
in the factory menu.
CO
2
VOC
The speed of the fans will be regulated by a CO2 sensor (or CO2-VOC) with 0-10V output and linear characteristic between 0 and 2000 ppm
(0V correspond to 0 ppm and 10V correspond to 2000 ppm); if the external signal of the CO2 sensor takes a value equal to 0V the control will
signal an alarm. For units equipped with variable speed fans:
AutoMin ppm corresponds to the concentration of CO2 (CO2-VOC) for which air quality is considered optimal, AutoMax ppm corresponds to
the concentration of CO2 (CO2-VOC) for which air quality is considered poor.
For units equipped with three-speed fans:
SP. 1,2% = Automax ppm - AutoMin ppm + AutoMin ppm
SP. 2,3% = 7 x (AutoMax ppm - AutoMin ppm) + AutoMin ppm
∆
= Automax ppm - AutoMin ppm
12
10
5
The values of SP.1.2% SP.2.3% and A depend on the values of the two parameters AutoMin% and AutoMax% according to the following:
None (default value) is not provided for the use of any device for the automatic management of fan speed.
