Balancing Valve – do not adjust

Hello,

I’m hoping someone can help me put right a big booboo I’ve made with my hot-water system. Whilst trying to isolate the hot-water I turned a red stop-cock next to the tank labelled “Balancing Valve – do not adjust”. Or rather the label wasn’t attached but I later found it knocking around on the floor. Now, I thought I’d counted the turns and put it back into it’s original position but now we’re having a problem with cold baths every morning. This isn’t the end of the world for me,…

Balancing Valve – do not adjust