Valve Purge - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Parameters
7.9.4

Valve purge

Options:
Valve purging by the device is enabled using this parameter. This parameter is used to trigger a device
opening and closing cycle during times when the valve is not in use to prevent the valve from seizing.
•
Deactivated: Valve purging is deactivated.
•
Automatically or triggered by object: Valve purging can be triggered via a group object or it occurs
automatically after an adjustable time has elapsed. The group objects Status Valve purge and Activate
valve purge as well as the parameters Purge cycle in weeks, Reset purge cycle from control value
greater than or equal to and Send group object "Status Valve purge" are enabled.
•
Triggered by object: The valve purging can be triggered via a group object. The group objects Status
Valve purge and Activate valve purge as well as the parameters Reset purge cycle from control value
greater than or equal to and Send group object "Status Valve purge" are enabled.
During the valve purging, the valve is opened completely once and closed again, corresponding to the
values set in the Valve drive opening/closing time parameter.
The purging cycle time is restarted if automatic valve purging has been activated at start-up of the device.
The purging cycle time will be restarted at the end of the actual purging period. The parameterized period
of valve purging is included here.
The purging cycle with an active automatic valve purge is reset and restarted if:
•
A manual valve purge is triggered via the group object Activate purge.
•
The parameterized value (in Reset purge cycle from...) is exceeded. The purging cycle is only
restarted once the parameterized value is reached or exceeded.
160 2CDC508220D0211 Rev. A | VC/S 4.x.1
Deactivated
Automatically or triggered by object
Triggered by object