Hi,
According to http://www.diyfaq.org.uk:
"If the idea of heating different areas of the house in different ways interests you then you'll need to look at 2-port valves for each zone. Doing this sort of thing with 3-port valves gets very complicated."
This is exactly what i want to do. Why is it very complicated?
I have 2 zones, radiators only - no cylinder for hot water. Zone 1 will be heated 80% of the time and zone 2 only 20% of the time. If I employ the traditional 2 x 2-port S-Plan any time the heating is on at least valve will be energised. It looks easy to implement but not very efficient.
The Y-Plan on the other, will have one port open (zone 1) by default, so 80% of the time it will not be energised. In this case the valve will consume power only if zone 2 or both zones call for heating. I see this implementation more elegant.
However, the 5-wire wiring schemes of the 3-way mid-position valves take into account the difference between the wiring of the room thermostat and the cylinder thermostat, i.e. the cylinder thermostat (which I don't use) supplies a signal to the 3-way valve when it calls for heat AND when it is satisfied.
Ideally, the valve would behave like this
Zone 1 calls for heating
Thanks in advance
According to http://www.diyfaq.org.uk:
"If the idea of heating different areas of the house in different ways interests you then you'll need to look at 2-port valves for each zone. Doing this sort of thing with 3-port valves gets very complicated."
This is exactly what i want to do. Why is it very complicated?
I have 2 zones, radiators only - no cylinder for hot water. Zone 1 will be heated 80% of the time and zone 2 only 20% of the time. If I employ the traditional 2 x 2-port S-Plan any time the heating is on at least valve will be energised. It looks easy to implement but not very efficient.
The Y-Plan on the other, will have one port open (zone 1) by default, so 80% of the time it will not be energised. In this case the valve will consume power only if zone 2 or both zones call for heating. I see this implementation more elegant.
However, the 5-wire wiring schemes of the 3-way mid-position valves take into account the difference between the wiring of the room thermostat and the cylinder thermostat, i.e. the cylinder thermostat (which I don't use) supplies a signal to the 3-way valve when it calls for heat AND when it is satisfied.
Ideally, the valve would behave like this
Zone 1 calls for heating
- Valve Port A open by default (not energised)
Boiler and Pump powered
- Valve Port B open (energised)
Boiler and Pump powered
- Valve Port A and B open (energised)
Boiler and Pump powered
- Valve Port A open by default (not energised)
Boiler and Pump stopped
Thanks in advance