How to change pressure?

[Rupesh7000]

Hello I have a Valiant thermocompact vu 282 boiler and for the last couple of weeks the pressure is showing as zero. I've looked through the manual but can't figure it out. Does anyone know how and where I can change the pressure??

Also should the pressure be between 1 and 2?

Any help would be really appreciated!!

 

[Madrab]

A picture of the bottom of the boiler would be helpful. That model would normally use a bog standard feed from the cold inlet called a filling loop.

A tap will be spurred off the cold mains inlet to the boiler, a flexible pipe would connect to that and then connect to a double check valve and maybe another tap on the return pipe of the CH circuit pipe. 1.5 bar would be about right. Tis all in the installation manual.

You do need to know why it reads 0 now though, where has it lost it's pressure, leaky PRV, Pipework, radiators/valves, EV issue??

 

[Rupesh7000]

Untitled

• Rupesh7000
• 18 Jan 2015
• 1

Untitled

• Rupesh7000
• 18 Jan 2015
• 1

Untitled

• Rupesh7000
• 18 Jan 2015
• 1

Hopefully you can see the pictures above.

I'm not sure why it went to zero. I only just purchased my property so it might of been like this for a while.

How do I adjust the pressure?

 

[Madrab]

You may find the connections are behind that piece of gyproc that is covering the pipework, the pipe 2nd in from the right should be the CH return and there should be a feed from a cold water mains pipe that connects to that pipe through the filling loop.

Given this 20+ yr old boiler is a sealed system boiler - not a combi - then there is no cold feed into the boiler so the cold feed could be remote from the boiler but it should feed into the CH return pipe somewhere, that's what needs to be found. Trace the return pipe back from the boiler till you find a connection off it.