EVCO c-pro kilo AHU - Manual (Page 67)

C-PRO KILO AHU APPLICATION MANUAL
Pag. 67
Note. It is necessary to enable the utilization of the external air temperature probe (PH40=1).
If the probe is in error the regulation is disabled.
6.11.3 Enable Free-Cooling and Free-Heating heat exchanger
The heat content regulation also considers the air humidity to enable the free-cooling and
free-heating processes. In order to utilize this function you must set PS01=2 and it is
necessary to enable the ambient humidity probes (PH41=1), external temperature (PH40=1)
and external air humidity (PH47=1). Additionally, it is necessary to set the value of the
atmospheric pressure in hPa (parameter PH34). The regulation provides the calculation of the
external heat content (HExt) and ambient heat content (HAmb).
The calculation of the heat content is done using the temperature value and the humidity
value utilizing the atmospheric pressure to achieve a more precise calculation. The
differential Set Point (PS16) and relative hysteresis (PS15) must be set in order to enable at
the regulation.
To enable see graphs below:
Note. If one of the probes in use are in error or if the regulation has not been configured it
will be disabled. This regulation can be used only in the presence of a external air humidity
probe which has been configured on the expansion; therefore this function can be utilized
only if the expansion is enabled (PG02=1).
PS12: Diff.
T. Ambient – T. External T. External – T. Ambient
PS13: SetFC
PS12: Diff.
PS13: SetFH
Enable Free-Cooling in temperature Enable Free-Heating in temperature
PS15
HAmb – HExt HExt – HAmb
PS16: SetFCHeat
exchanger
PS15
Enable Free-Cooling heat exchanger Enable Free-Heating heat exchanger
PS16: SetFHHeat
exchanger