Well, I finally got round to changing the TMV. The mesh on the hot feed was almost completely blocked. So, fitted a Reliance solar tempering valve and a Protecto YC In Line Y Type Strainer ahead of it (to make maintenance easier), and job done. Nice hot water at 5 bar!
My wife could not be...
I just discovered that the TMV connecting to the DHW outlet from the thermal store tank is a Caleffi 5213, which is a point-of-use valve! The plumbers should have installed a tempering valve, for whole house use - and probably a solar tempering valve at that, because the outlet temperature is...
The surging came every 2 seconds or less. In any case that's excellent advice about bypassing the TMV - that will tell me whether the flow out of the heat exchange coil is adequate or not. The way I see things, it's got to be either the TMV or coil. Thanks again. I'll let you know once I've had...
Hello.
I wonder if anyone has a view on this problem of mine, which has been steadily getting worse: We have a waterjacketed woodburner that heats a 1,000L thermal store tank. We get mains hot water through a copper coil inserted in the thermal store, which heats the water. Over the last few...