ABB i-bus® EIB / KNX Project design and programming4.4.5 Parameter window:“Valve purge”Regular purging of a heating valve can prevent deposits from forming in thevalve area and restricting the valve function. This is particular important attimes when the valve position does not change very much. The valve isopened to the maximum during a valve purge. It can be triggered via theobject “Trigger valve purge” and/or automatically at adjustable intervals.Parameter: “Time of valve purge”The duration of a valve purge is set here.Parameter: “Automatic valve purge”If “yes” is entered in this parameter, the valve is automatically purged atadjustable intervals.Parameter: “Period between valve purges”This parameter is visible for automatic valve purging. It defines the intervalbetween two valve purges.© 2004 ABB STOTZ-KONTAKT GmbH 48