"Grunff" wrote in message
...
Doctor Evil wrote:

A secondary circulation loop required here.

And one of those is?

A DHW draw-off pipe taken from the store looping around to all the taps and
back to the store. Hot water is pumped through the loop, so instant
draw-off at the taps. A bronze pump on a timer (or a dedicated secondary
circulation Grundfos will do) , a pipe stat and a few check valves. The
timer keeps the pump off at night.

Do Google secondary circulation on IMM and how to fit on a heat bank or
thermal store should be there.

In your case, I would connect up the coil from the cold supply, out of the
coil and into the plate, to the taps and back to the cold supply. Two check
valves have to be fitted near the cold inlet and the pump is fitted near the
cold supply to the coil. Put in an in-line restrictor on the return to
lower the flow so the flow switch does not cut in unnecessarily.


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