Hi,

I've got a Vaillant ecotec plus 831, and pressure's low. Not F22 low yet but getting there. I know I just need to turn a flathead screwdriver for a few seconds to increase the pressure in the system. But I've taken the bottom of the cupboard off, and there's at least 5 things I could turn...

I've put a picture here to help:
http://img213.imageshack.us/img213/6144/boiler.jpg

Can anyone tell me which one(s) I need to switch to increase the pressure?

Many thanks,
Mark

Mark, October 2010

i had same problem both valves were letting frew slowly i had to put an isolation valve in between the inlet hose

luke, February 2011

Hi I have a Vailant 630 system boiler and the pressure goes up to maximum 3.3 bar and im force to take water out from the radiator to decrease the pressure, I just changed the expansion vessel and pumped it before conecting it to 12 psi as per instruction I have also changed the pressure sensor, as I said I set the pressure initially at 1.3 bar after few hours it reaches 1.9 and the following day is at maximum 3.3 bar. Can someone please advise what to do, many thanks

Darius, December 2010

Thanks guys.

Mark, October 2010

turn c inline with pipe slowly to put pressure into boiler.turn the slot across pipes c and d to close loop properly.

deano, October 2010

c

BRUCEY, October 2010