L
lazy-riders
Hopefully someone can help me out please. We have installed a biomass system which feeds multiple properties. Each property has an s plan system. A 2 core signal cable is connected to the orange and brown cable on the 2 port valve at each property which sends a volt free signal back to the biomass controller via a junction box to indicate a demand. This then sends a 230V signal to a contactor which turns on the district pump.
This all works fine apart from the biomass controller has an overun of 10mins for the district pump (which cannot be disabled as boiler will go into fault) and unfortunately because of RHI we cannot fit a bypass on the system.
So the workaround is to fit a relay that will switch the district pump off as soon as there is no demand signal from the 2 port valves. The signal sent from the biomass controller to 2 port valve when measured was 1.8v dc or 2.4v ac?
My question is what relay could I use (an RS product code would be helpful) and how would I connect it as i've not had much to do with relays before.
Wiring diagram is here
View image: Wiring
Thanks for your help.
This all works fine apart from the biomass controller has an overun of 10mins for the district pump (which cannot be disabled as boiler will go into fault) and unfortunately because of RHI we cannot fit a bypass on the system.
So the workaround is to fit a relay that will switch the district pump off as soon as there is no demand signal from the 2 port valves. The signal sent from the biomass controller to 2 port valve when measured was 1.8v dc or 2.4v ac?
My question is what relay could I use (an RS product code would be helpful) and how would I connect it as i've not had much to do with relays before.
Wiring diagram is here
View image: Wiring
Thanks for your help.