Discuss Heating wiring advice in the UK Electrical Forum area at ElectriciansForums.net
I always thought you needed the hot water on for the heating to work. But to get hot water only one had to separate it from the heating?
Yes there are 2 pumps hot water pump comes on with switch live from cylinder stat and I've put heating pump on with the orange wire fed from the 8 zones but it also comes on with the hot water valve
Yes as the orange wire is the output from the zone valve, and most likely connected to the switched live of the boiler then everytime the boiler fires up the heating pump will run.Yes there are 2 pumps hot water pump comes on with switch live from cylinder stat and I've put heating pump on with the orange wire fed from the 8 zones but it also comes on with the hot water valve
That would work as far as not back feeding or needing a relay, but I'd be a little bit cautious about wiring that way, I'm not a plumber but by feeding the input of the valve your operating the pump at the same time as the valve so for a short time you would be pumping against a closed valve ( maybe not a big deal) if a valve were to fail though I'm not sure that is too good for the system.Dont think you need a relay, just pair the pump doing the heating with the brown of the 2port valve doing heating.
That would work as far as not back feeding or needing a relay, but I'd be a little bit cautious about wiring that way, I'm not a plumber but by feeding the input of the valve your operating the pump at the same time as the valve so for a short time you would be pumping against a closed valve ( maybe not a big deal) if a valve were to fail though I'm not sure that is too good for the system.
I know in commercial heating systems they install a loop of pipework (shunt loop) with a seperate pump which usally overruns to avoid this situation and to help dissipate the heat.
Dont think you need a relay, just pair the pump doing the heating with the brown of the 2port valve doing heating.
I understand that mate but where do I feed the relay from bearing in mind there's 8 valves and I don't want to connect all together so if 1 valve opens it brings on all the others
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