Unvented

[quality]

Hi guys. I been to a job today to look at some work. It has had a recent inatall (not by me) WITH an unvented CYL with heat only boiler etc. Connected using a S plan with 2 two port valve all standard stuff. There was no high limit 2 port valve for the cylinder which would mean there should be 3 two port valves. is this allowed? I thought not but the install is very good and all document there with it so its not DIY

 

[sheff paul]

Hi guys. I been to a job today to look at some work. It has had a recent inatall (not by me) WITH an unvented CYL with heat only boiler etc. Connected using a S plan with 2 two port valve all standard stuff. There was no high limit 2 port valve for the cylinder which would mean there should be 3 two port valves. is this allowed? I thought not but the install is very good and all document there with it so its not DIY

yes you can have a standard 's'plan set up,only need additional valve if 'y' plan is used,look at pre plumbed unvented usually contains 2 two port valves

 

[Killy Bing]

you wire the hot water two port via the high limit stat