Search results

No zone valve on the boiler loop. Not needed. Boiler just heats up the vented thermal store. Stat on tank needs to be at 75 and boiler on max approx 80 so tank stat controls. Pump is wiko with three settings and on 3. I did move down to 2 but no joy...

Folks, system is an Ideal Icos heat only boiler topping up a thermal store upstairs so pretty simple flow and return to boiler. All is working fine other than an occasional bang close to the boiler that is strong enough to shudder back to the 210lt tank and make it shake also. Boiler...