Hot water only but have changed the 3 way valve & contro

[jameswhite1979]

OK I will go investigate and check the wiring feedbacking once I understand a little more.

In mean time I checked the wires from the programmer as I think this what was also requested

View media item 69508

 

[jameswhite1979]

Whilst CH only at programmer, room thermostat is high and the valve has moved to mid position I get the following:

Valve White to Valve Blue = 235V
&
Valve Grey to Valve Blue = 68V

 

[MANDATE]

The yellow from the cyinder stat to the grey does the same job under different circumstances.
When HW becomes satisfied, power from programmer HW ON gets diverted to the grey.
But this only works when HW is ON and has been satisfied.
If HW is not on, there is no power to divert.
So try HW and CH together

 

[twgas]

Whilst CH only at programmer, room thermostat is high and the valve has moved to mid position I get the following:

Valve White to Valve Blue = 235V
&
Valve Grey to Valve Blue = 68V

As expected. What happens If you turn HW on at prog (leave heating on)
Are the 2 circled connections either end of the same wire?

 

[jameswhite1979]

Before I try, the boiler also lets me set temp for the Rads and the water, what should I have these set to if it might make a difference?

Also some info as just checked so might be useful. On the valve grey wire there is also the programmers right hand side Earth wire and the yellow from the Cyl stat.

 

[twgas]

Move the green and yellow, at prog to no1, you should tag it with a brown sleeve - its not ideal but will work (if all else is correct)

 

[jameswhite1979]

Whilst CH only at programmer, room thermostat is high and the valve has moved to mid position I get the following:

Valve White to Valve Blue = 235V
&
Valve Grey to Valve Blue = 68V

As expected. What happens If you turn HW on at prog (leave heating on)
Are the 2 circled connections either end of the same wire?

With CH only on at Prog the valve moves to the mid position and nothing else, when I press water the pump starts and I hear the boiler start up.

Yes I have circled with the same colours the different ends of each wire from the prog box to the wiring box

 

[jameswhite1979]

The yellow from the cyinder stat to the grey does the same job under different circumstances.
When HW becomes satisfied, power from programmer HW ON gets diverted to the grey.
But this only works when HW is ON and has been satisfied.
If HW is not on, there is no power to divert.
So try HW and CH together

With CH only on at Prog the valve moves to the mid position and nothing else, when I press water the pump starts and I hear the boiler start up.

 

[twgas]

Now turn down the cyl stat, till it clicks, report findings

 

[jameswhite1979]

Now turn down the cyl stat, till it clicks, report findings

I turned the cyl stat down to 50c and there was no click and nothing changed

 

[twgas]

Do you have hot water?

 

[jameswhite1979]

Move the green and yellow, at prog to no1, you should tag it with a brown sleeve - its not ideal but will work (if all else is correct)

Is this what you are suggesting?

View media item 69509
Should I try this now as a test or after the current tests I am trying?

 

[jameswhite1979]

Do you have hot water?

I do have hot water

...but this might not a fair result as I have had the water on today to keep the house warm when the other programmer was broken and I previously manually set the valve to mid position and locked.

 

[twgas]

Move the green and yellow, at prog to no1, you should tag it with a brown sleeve - its not ideal but will work (if all else is correct)

Is this what you are suggesting?

View media item 69509
Should I try this now as a test or after the current tests I am trying?

No, that's the wiring centre, I meant the g/y that is, at the moment, connected to the earth connection at the programmer.

 

[jameswhite1979]

Move the green and yellow, at prog to no1, you should tag it with a brown sleeve - its not ideal but will work (if all else is correct)

Is this what you are suggesting?

View media item 69509
Should I try this now as a test or after the current tests I am trying?

No, that's the wiring centre, I meant the g/y that is, at the moment, connected to the earth connection at the programmer.

Ah, sorry understand now :S

So like this:

View media item 69510