EVCO c-pro kilo AHU - Manual (Page 66)

C-PRO KILO AHU APPLICATION MANUAL
Pag. 66
6.11 External Air Shutters
The program provides the managment of a motorized shutter for the intake of external air to
support the ambient temperature regulation. The type of management is determined by
parameter PG07, in the constructor menu:
- PG07=0: Disabled
- PG07=1: Enabled in modulating regulation
- PG07=2: Enabled in fixed opening
In modulating regulation, the shutter can be utilized for:
- Free-Cooling / Free-Heating in temperature (parameter PS01=1)
- Free-Cooling / Free-Heating heat exchanger (parameter PS01=2)
- Air quality control (parameter PS02=1)
The regulation also provides a position of minimal opening of the shutter to guarantee the
minimal quantity of projected renewed air (parameter PS05) and the corresponding
maximum position of the opening (parameter PS06).
6.11.1 Regulation in fixed opening
In this mode the external air shutter always assumes the same value of opening as decided by
parameter PS10. In this regulation the range of values of opening is from 0% to 100%, there
is no minium value for the opening. In order to utilize this regulation it is necessary to set
PG07=1.
Note. With this modality the free-cooling, free-heating and the air quality control cannot be
utilized.
6.11.2 Enable Free-Cooling and Free-Heating in temperature
The free-cooling in temperature, if enabled (PS01=1), can be activated when the difference
between the ambient air temperature and the external air temperature reaches the Set Point
which has been set (parameter PS13) and relative hysteresis (parameter PS12).
The free-heating in temperature, if enabled (PS01=1), can be activated when the difference
between the external air temperature and the ambient air temperature reaches the Set Point
which has been set (parameter PS13) and relative hysteresis (parameter PS12).