Range Tribune HE expansion valve - increase pressure

[TomtheMonkey]

Hi everyone, I've found a few articles on this site regarding a Range Tribune HE heating system with and expansion valve and instructions of how to increase the pressure, but they all refer to having a connection near the vessel which I do not have (as shown in the picture).

I have connected the braided cable to one valve which has the black tap on it but I don't know where to connect the other end. Can anyone help please?

Many thanks, Tom

 

[Dan Robinson]

More pictures please.

 

[TomtheMonkey]

Hi Dan, do they help? if not let me know what else you would need an image of.

 

[Dan Robinson]

Looks like it is the valve with the brass cap on it under the black tundish.

Take the cap off.

 

[TCCHeating]

Edit. What Dan said

 

[TomtheMonkey]

Does the heating system have to be turned off before I can do this?

 

[Dan Robinson]

Not really.

 

[TomtheMonkey]

Ok, I just turned the screw near the connection where the brass cap was and the pressure is going up again.

Thank you so much for your help.