Valiant boiler installed yesterday

1socrates1

Hi,

I had a vailant ecotec plus installed yesterday. I ran myself a very tall hot bath today and when I returned to the boiler it was flashing 0,9 bar on the display. I took this to mean the pressure was low so I opened the taps under the boiler and it is now sitting at 1,6 bar. Have I done something wrong and is it alright if the pressure is at 1,6 now?


Thanks

Pincher

If it goes below 0.8bar, you will get an error code that says pressure low. If the pressure is too high, the temperature/pressure relief valve will blow (squirt, not explode).


Your mains water pressure is probably 1.6bar, so when you open the filling loop, it fills the system to 1.6bar. This means when the boiler heats the water up, it will get to around 2.0bar, which is nothing to worry about. If you prefer not to put undue pressure on old plumbing joints, you can bleed the radiators to reduce the pressure. Close the feeding loop, of course, otherwise the mains water just fills it up to 1.6 bar again.


My system seems to be happy at 1.0 bar when cold, about 1.3 bar when at 50 degrees (condensing), and about 1.5 bar when heating the hot water cylinder, when it needs to go up to about 80 degrees.

1socrates1

Thanks so much for your reply it helps a lot.

daveyjp

1.5-1.8 is fine, but if it drops again there is a leak somewhere which needs sorting as pressure shouldn't drop.