Refilling a sealed heating system

[lavinpj1]

I've just had a new boiler installed. The old one had a pressure gauge which allowed me to see when the system was at the correct pressure after draining it down. The new one doesn't have this.

When refilling it, how should I know that it's at the correct pressure?


Phil

 

[sooey]

New Vaillant?

If it is press the right selection button twice to see the pressure.

In any case the installer should have explained stuff like that to you.

 

[lavinpj1]

It's a Worcester Bosch Greenstar 40CDi Classic Regular. Can't see anything in the manual regarding how to see the pressure.

I've tried to get in touch with the guy that installed it to no avail :/

 

[sooey]

I don't fit them, so I don't know the answer.
But you should have a set of installation instructions as well as a user manual. Have a butchers in there if no one else comes up with the answer.

 

[TCCHeating]

The cdi regular doesn't have a pressure guage. As it is designed for use on open vented systems. To use it on a sealed system, your installer will have installed an expansion vessel, pressure relief valve, filling link and pressure guage somewhere on the system. They normally come as a kit so will all be in one place.

Have a look for a large expansion vessel. (Usually red and shaped like a rugby ball.) the pressure guage and filling link will be next to it

 

[lavinpj1]

Thanks. Seems my plumber wasn't quite as knowledgeable as you. No pressure gauge fitted. Had to install one myself - works well.

 

[bernardgreen]

Did he also forget to fit

an expansion vessel, pressure relief valve,

.?

 

[lavinpj1]

They existed already on the system so he didn't have chance to forget