EVCO c-pro kilo AHU - Manual (Page 68)

C-PRO KILO AHU APPLICATION MANUAL
Pag. 68
6.11.4 Free-Cooling and Free-Heating Regulation
The regulation of the free-cooling/free-heating commands the opening of the external air
shutter. When free-cooling/free-heating conditions exist; or if the regulation can be enabled
(and the request is greater than zero) the ramps which command the heating/cooling are split
into two successive ramps, the first (half the differential) regulates the free-cooling/free-
heating using the external air shutter, the second regulates the heating/cooling valves.
SUMMER operation/COOLING: Free-Cooling
WINTER operation/HEATING: Free-Heating
Note. If one of the probes included in the regulation is in error the regulation of the free-
cooling/free-heating can no longer be utilized and the heating/cooling ramp regulate the total
regulation differential.
Set Point
Delivery
T. Delivery
Pb01
Pb01 / 2
Neutral
Zone
100 %
0 %
Cooling coil
External air shutter
regulated in free-cooling
Set Point
Delivery
T. Delivery
Pb01
Pb01 / 2
Neutral
Zone
100 %
0 %
Heating coil
External air shutter
regulated in free-heating