B
bugginbob
I have a WBS with back boiler and have had a newark presurrised vented thermal store fitted along with new pipework and rads.
Initially the heat leak rad wasnt getting hot at all and the installer eventually (after I got cross) found that he had positioned the expansion tank too low so any excess hot water was travelling up into the expansion tank and then out onto the roof rather than dissipating into the heat leak rad. The height of the tank was changed and now the heat leak gets hot. This is fine when the WBS is running but at other times when relying on immersions in the store all the heat from the store dissipates into the heat leak rad. Twin immersins cant keep up with the heat loss and the installer tells me to manually turn off the heat leak each night/morning.
I gather the heat leak shouldnt be turned off for safety reasons and remembering to turn it on and off is a nightmare, not to mention a pain as that room is always at the wrong temperature. It's pointeless having a thermal store though when all it's heat is lost within a couple of hours. As there is an expansion tank and another vent on the thermal store is it safe to fit some kind of valve to the tee to the heat leak rad to keep it off until the water in the tank is at a certain temp.
Should the water be expanding out of the thermal store as much as it is? The way it was sold to me suggested it would store the hot water for a reasonable period of time, not just expand out when warm.
Any help would be greatly appreciated. We've offered our plumber one last chance to resolve this but I want to know what the safest and most sensible option is.
Initially the heat leak rad wasnt getting hot at all and the installer eventually (after I got cross) found that he had positioned the expansion tank too low so any excess hot water was travelling up into the expansion tank and then out onto the roof rather than dissipating into the heat leak rad. The height of the tank was changed and now the heat leak gets hot. This is fine when the WBS is running but at other times when relying on immersions in the store all the heat from the store dissipates into the heat leak rad. Twin immersins cant keep up with the heat loss and the installer tells me to manually turn off the heat leak each night/morning.
I gather the heat leak shouldnt be turned off for safety reasons and remembering to turn it on and off is a nightmare, not to mention a pain as that room is always at the wrong temperature. It's pointeless having a thermal store though when all it's heat is lost within a couple of hours. As there is an expansion tank and another vent on the thermal store is it safe to fit some kind of valve to the tee to the heat leak rad to keep it off until the water in the tank is at a certain temp.
Should the water be expanding out of the thermal store as much as it is? The way it was sold to me suggested it would store the hot water for a reasonable period of time, not just expand out when warm.
Any help would be greatly appreciated. We've offered our plumber one last chance to resolve this but I want to know what the safest and most sensible option is.
