Boiler pressure too high

by8auj6csd3ioq

Baxi Megaflow Condensing Boiler . Put too much water in and pressure is over 3 bar. It says if over 3 will indicate a fault. It doesn't. Is it safe to have on.? Do all rads have to be bled to reduce pressure or just one?

K.Flyer

You can vent water from just one rad to reduce the pressure on the system.
Try get it down to approx 1.25 bar with the system cold.

by8auj6csd3ioq

Thanks. can i use it tonight i don't have a rad key till tomorrow

Cole Limited Dewdrop

Cole Limited Dewdrop wrote: »

Thanks. can i use it tonight i don't have a rad key till tomorrow

I wouldn’t

by8auj6csd3ioq

Thanks guys I bled a rad with sysstem cold and the pressure went down to 1.5 but no matter how much i bleed it won't go down further. There is a mark on the dial just uder 1 where it should be i assume

Wearb

Do you have an automatic filler that’s frustrating your efforts?

by8auj6csd3ioq

Wearb wrote: »

Do you have an automatic filler that’s frustrating your efforts?

no. i have to fill manually. Could it be air. I do not hear hissing

Wearb

Cole Limited Dewdrop wrote: »

no. i have to fill manually. Could it be air. I do not hear hissing

Stuck Gauge or port?

jca

Gauge is <mod snip> broken...
Sigh.....

by8auj6csd3ioq

"Stuck Gauge or port?"

wnet down from 3 to just under1.5

Wearb

Cole Limited Dewdrop wrote: »

"Stuck Gauge or port?"

wnet down from 3 to just under1.5

Ok, so unlikely the port, but could be the gauge sticking at that point. How many stories?

by8auj6csd3ioq

Stories?? you mean the house? There is a downstairs and upstairs. the boiler is downstairs

Wearb

Cole Limited Dewdrop wrote: »

Stories?? you mean the house? There is a downstairs and upstairs. the boiler is downstairs

Just 2 stories then. So that’s not causing 1.5 bar pressure. Turn off water supply to heating and bleed highest radiator until water stops. The gauge (if working) should drop to about 0.5 bar.

by8auj6csd3ioq

"turn off water supply to heating " close valves on all rads?

What is in the water it is black. an anti corrosion? i used a towel as i did not expect so much. Is it ok to put thetowel in the wash with other stuff?

Thanks for your help i will do in the morning

Wearb

"turn off water supply to heating "

Yes

close valves on all rads?

No

What is in the water it is black. an anti corrosion? i used a towel as i did not expect so much.

The blackness is created from a reaction with oxygenated water and the metals in the heating system, Too much topping up causes this and also diluted the corrosion inhibitor.

Is it ok to put thetowel in the wash with other stuff?

Thanks for your help i will do in the morning

I would at least rinse out the towels before using them in a wash with other clothes, but to answer your question directly, I don't know if its ok.

If you have a valve letting water by, you could be draining rad till doomsday. You might save yourself a lot of trouble by getting a plumber.

by8auj6csd3ioq

ok not sure what do you mean by "turn off water supply to heating". There is a valve to turn to fill when the pressure is down but that is all the way closed. Thanks. Noted re towel and plumber

Wearb

Cole Limited Dewdrop wrote: »

ok not sure what do you mean by "turn off water supply to heating". There is a valve to turn to fill when the pressure is down but that is all the way closed. Thanks. Noted re towel and plumber

That is the valve I was writing about. All the way closed doesn't mean it's working properly. That is why I wanted to see if water just continues arriving at the upstairs rad when that valve was off.

by8auj6csd3ioq

That is the valve I was writing about. All the way closed doesn't mean it's working properly. That is why I wanted to see if water just continues arriving at the upstairs rad when that valve was off.

understand now. will try it tomorrow. Thanks

clfy39tzve8njq

The fact that you need to top up in the first place suggests a leak somewhere. Continually leaving fresh water into the system will corrode the rads and they will leak.

by8auj6csd3ioq

no it doesn't. i did not say i need to do it continually

jca

Cole Limited Dewdrop wrote: »

no it doesn't. i did not say i need to do it continually

It looks like it's topping itself up.

clfy39tzve8njq

jca wrote:

It looks like it's topping itself up.

Either way water fresh water going into the system will lead to corrosion