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

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.

Maybe next time around. The house is now done. No more DIY for a good
few years.

I would have at least connected up the coil with the plate in parallel, so
that if the DHW pump or plate fails, turning three valves will bring in the
coil, and no down time in DHW. It is there so use it. That can be done in
a few hours costing about £15.



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