Quote:
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Originally Posted by Christian McArdle
Quote:
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Originally Posted by Doctor Evil
Take both zones of a heat bank with a
pump on each. The heat bank makers
will install two flow and return tappings on
the bottom of the heat bank
for the two CH zones. The best way.
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Although if the zones start to multiply, you can always share a tapping on a
pumped circuit, if you're careful.
Personally, if I was designing a system from scratch, I'd be tempted to have
one tapping, one pump, a "manifold" and an S-Plan system, rather than go
multiple pump, which can have issues with parasitic circulation (or noisy
valves to cure such) in some cases. Also, zone valves can be cheaper than
pumps, which may be an issue on multiple zone systems.
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A heat bank/thermal store, presents you with a wonderful neutral zone. Pumps are not expensive and are far more reliable than 2-port zone valves. You put a check valve on each CH zone to prevent back circulation. Each pump can have its speed set to the needs of the zone. There will be no parasitic circulation if each zone has its own flow and return tapping off the store.