Change-Over Control
For a correct operation in a 2-pipe system, you must connect:
- the cooling valve output of the “PRCC_PreCtrlClg“ to the cooling valve input of the heating pre-control macro
- the cooling pump command of the “PRCC_PreCtrlClg“ to the cooling pump input of the heating pre-control macro
In this case, the:
- heating valve output will provide the maximum signal of the two heating and cooling valve signals
- heating pump output will run if any of the heating or cooling pumps are commanded (OR signal of both pumps)