Boiler Fires when turning Cold Tap Off!

[marmaliser]

Our Vokera Linea 28 has started firing up when the Cold taps are turned off. I did add some tee's off of Cold, Hot and Heating yesterday to feed new shower room.

I.e. run cold tap for as long as you want and then turn off, for a split second whilst turning of the cold tap the boiler fires

Other than that it is working OK

Any Ideas

 

[COG]

Sound like water hammer, tripping the flow switch at the boiler. remove any dead legs of pipework (trapped air in the dead leg) and fully clip your pipework, if it persists you may have to fit a miny expansion vess

 

[marmaliser]

Cheers Cog

That sounds about right as there are 2 unlcipped dead legs waiting for the plasterer to come in.

I have just bled of the air (but not clipped the pipes yet) and this has reduced the tripping considerably so hopefully by the time everything is installed and being used this will not be a problem.