EVCO EPK4BHQ1AH Installer manual - Manual (Page 68)

EVCO S.p.A. c-pro 3 NODE kilo AHU | Application manual ver. 1.0
page 68 of 114
6.10 Fans
The air handling unit can control two fans, one supply fan and one return fan. Both fans are controlled in the same
fashion; the type of control is set by the parameter PF01 (Continuous Control, Continuous/On Off Control, On/Off
Control, Modulating control, Modulating control with steps to enable, Static pressure control).
Supply fan and return fan can be enabled in the CONFIGURATION Menu using the parameters PG08 and PG09.
Fans are controlled by the room temperature sensor using a set point and a differential value.
With parameter PF05 = Minimum time between fan start-up and shutdown of supply and return fans, it is possible to
define a time delay between the start-up of the supply and return fan, and the shutdown of them.
PF01: control mode fans
PG08: enable return fan
PG09: enable supply fan
PF05: Minimum time between fan start-up
6.10.1 Continuous control
The continuous control is connected to the status of the air handling unit; the fans turn on and off every time the
machine is turned on and off. In order to set this control select PF01=0.
6.10.2 Continuous/On Off control
During summer the controller uses continuous control, otherwise in winter the control is On/Off type. In order to set
this control select PF01=1.
6.10.3 Control On/Off
The On/Off control provides ability to switch on or off fans depending on the room temperature.
The room temperature is compared with the control Set point (SEtC, SEtH) and a differential (PF02), see also the
figures below.
In order to enable this control select PF01=2.
Each mode of operation (summer/winter) has its own distinct control.
SUMMER operating mode
SEtC (SEtH): Set
OFF
T. room
PF02:
ON