Ecotec plus 831

[Ke1]

My pressure is very high on boiler. Any idea how to get pressure out.

Would be grateful.

 

[Deleted member 267285]

Check the prv 1st, if this has operated (which at that it should have) then it’ll drain itself. How has it got that high? You could if needed drain from the drain off under the boiler or from a radiator.

 

[Ke1]

Thanks for reply.
Sorry for ignorance. What's prv ?
I filled system. Turned both keys back closed.

Just took some water out of rad . It's gone down a bit (thanks )

 

[Deleted member 267285]

Sorry, it’s not ignorance, it’s me talking in engineer dialect. It’s a pressure relief valve which is preset to 3 bar pressure, it’s attached to the 15mm copper pipe on the right as you look at it, near the return pipe and white plastic pipe. This usually terminates externally, if it’s dripping water, it has activated.

 

[Ke1]

Thanks for explaining . .. a definite novice.
Can't see it dripping.

However if I let more water out of the rad. Will the pressure keep dropping down to a decent level do you think... I will call vaillant in the morning for a service. Just want to make sure it's safe

Thanks again .
K

 

[Ke1]

Also wondering if filling loop key are not turning off properly . (Even though in closed position.)

 

[Deleted member 267285]

Also wondering if filling loop key are not turning off properly . (Even though in closed position.)

Why do you think that? (It is possible btw).

 

[Deleted member 267285]

Yes, if you keep letting water out of the rad to a decent level it should be ok. On that model of Vaillant you want the pressure at approx 1.5 bar - 2.0 bar.

 

[Ke1]

Why do you think that? (It is possible btw).

It started creeping back up....

 

[Deleted member 267285]

It started creeping back up....

Well that could be at least 1 of 3 possibilities:

1. The loop isn’t closing, as you suspect
2. There’s an expansion issue - if you’re heating is on
3. There’s a pinhole in the secondary heat exchanger

 

[Ke1]

Thanks for your help

 

[Deleted member 267285]

Thanks for your help

You’re welcome. 1 thing I will say, I mentioned if the heating was on and the pressure rising, if this is the case, either the expansion vessel is flat (rubber membrane that’s inflatable) or the pipe to it is blocked. If you’re contacting Vaillant for a service, ask them about this whilst they’re on site. It doesn’t have to be Vaillant, a local independent engineer can service the boiler.

 

[Ke1]

Thanks so much !! You have been brilliant. What a great site !!!