Valves on a combi volt free

[Redvanman]

By George I think you've got it

 

[onions1066]

But if they aren't spring loaded they will be held open by the back feeding voltage

 

[Redvanman]

Good grief man NO

 

[Spark1979]

How can it back feed when 1 stat does one motor and another stat does other the motor. The only parts that are linked together is the no volt contacts to tell the boiler to fire up

 

[onions1066]

Which in turn control the 230v side of the fan and ignition pcbs . As I said only1 way to find out is to connect up.

 

[Redvanman]

A:veryangry2::veryangry2:HHHHHH

 

[Sharpend]

So the boiler generates its own low volt signal, which is returned when the micro switch is operated. Is the micro switch operated physically when the valve motor turns, by a cam. Therefore two voltage system but completely separate. Only mechanically connected.

 

[onions1066]

Noooooooooooooo

 

[stuartcourt]

jesus christ power up a 2 way valve switch live (brown) without the permanent live connected (grey) the valve will open and close as power connected and disconnected via stat, the orange will allow through whatever voltage is connected to the grey (usually 230) or in this case the volt free supply from boiler

 

[onions1066]

jesus christ power up a 2 way valve switch live (brown) without the permanent live connected (grey) the valve will open and close as power connected and disconnected via stat, the orange will allow through whatever voltage is connected to the grey (usually 230) or in this case the volt free supply from boiler

So what is switching the boiler and you just said the grey was disconnected so the orange won't be letting anything through

 

[stuartcourt]

I think your winding me up onions :clown: but for benefit of doubt the grey on standard 230 s plan heating system does nothing except fire boiler when brown switch live closes contacts between grey and orange

 

[Redvanman]

Over to you stuart
good luck
:90:

 

[Dcf]

When a motorised valve motor is energised it makes the micro switch switch.
when it has no voltage to it the micro switch breaks.
On a normal s plan the switch is connected via the grey live and orange sw live.
to get this to work with nv .....
wire from prog or room stat to valve
you might want to put this on a seperate zone as u floor takes longer than rads to hit temperature.
wire back to boiler with a cable to boiler to switch the relay inside the boiler.

 

[onions1066]

So what is switching the boiler and you just said the grey was disconnected so the orange won't be letting anything through

Ok yes I got ita while ago but Sunday afternoons really drag with nothing to do so just wanted to entertain myself for a bit. But yes your right...............I think