Vaillant eco tec pro

[gemshan1]

Hi , slight problem?or not? Have the above combi less than a year old, after adding another rad I started the process of refilling the system, bled all rads a couple of time and topped up through filling loop whilst watching the pressure go up, I'm sure but can't be 100% it was around 3 bar or over when all of a sudden water started flooding out from under the right hand side of the boiler! I quickly turned off the filling loop and it stopped? This was yesterday and since all has been working ok, hot water and heating, my concern is that maybe there's something wrong? Is it some sort of pressure release?
Thanks in advance for anyone that could answer this.

 

[oldbuffer]

1. Shouldn't be filled to more than about 1.2 to 1.5 bar cold.
2. Bleed water off through a radiator bleed valve until pressure drops to 1.2 bar.
3. Sounds as if the pipe from the pressure relief valve to outside hasn't been fitted, or hasn't been properly fitted. Get the installers back.
4. Once the pressure relief valve operates, they often don't re-seal properly. Once pipe work is correct keep a check for a few weeks that there is no dripping to outside.