In this control function, Intelligent Valve acts as a dynamic control valve in an HVAC application, using two sets of parameters for the limitation functions, such as the volume flow maximum or the ΔT limitation: one set for heating operation, and one set for cooling operation. The operating mode (heating or cooling) is recognized automatically via the measured flow and return temperatures. The example depicts this based on a throttling circuit for a combined heating/cooling register.

The automation station [N1] switches between heating and cooling mode as needed, and specifies the setpoint of 0…100 % on Intelligent Valve. Intelligent Valve follows this setpoint and sets the appropriate volume flow.

 

The factory setting for the Intelligent Valve application is 2-port; for EXG../EXF.., the object VlvDsgn (Valve design) must be changed to "3-port" in ABT Go or ABT Site.

2-port valves
EVG../EVF..

3-port valves
EXG../EXF..

N1

Automation station

M

Setpoint source