Viessmann boiler some advice required

[Colin Parkinson]

We have just moved house and the boiler is a Vitodens 222-F with Vitotronic 200 control unit with weather compensation.
I understand that the heating will come on at times even though the programmer is not calling for heat. But I am not happy with this.

For example the stat is set at 19deg, sun is on the living room, room temp is 22 deg, and the radiators are on, even though the clock is turned off.

Also middle of the night, heating comes on, bedroom gets up to 19 deg, too warm to sleep! But clock is off until 8.00!

Is there a way I can control the boiler in a conventional way using this programmer?

Any other ideas guys?

 

[ShaunCorbs]

Set the program / new times as it’s still controlled

Still uses times

@townfanjon

 

[Colin Parkinson]

Set the program / new times as it’s still controlled

Still uses times

@townfanjon

Sorry that makes no sense to me!

 

[ShaunCorbs]

Have you set the heating program ?

As the boiler doesn’t fire / heat for no reason

 

[Colin Parkinson]

The boiler is working OK, it is just that it comes on when the clock is off!

 

[townfanjon]

Colin as shaun implied its all controllable, is it the new touch screen or the old type ?

 

[Colin Parkinson]

Not touch screen

 

[townfanjon]

Its hard to say without seeing it but it sounds like your setback temp is too high ( moon icon )
Press bottom button ( three lines , three dots )
Press ok on heating
Go to reduced temp , press ok, and set at approx 13 degrees , press ok , exit by pressing top button ( back button)
What was the setback temp

 

[Darren Jackson]

Also what are your TRV'S set at if your rads are on in a room that is 22 degrees. They want turning down to 3. A Lot of folk have them turned up to 5/max not realizing that they will not work as designed to when they are set to max.

 

[Colin Parkinson]

Also what are your TRV'S set at if your rads are on in a room that is 22 degrees. They want turning down to 3. A Lot of folk have them turned up to 5/max not realizing that they will not work as designed to when they are set to max.

Thanks Darren TRVs are set at 2.

 

[doitmyself]

It sounds as if the weather compensation has not been properly adjusted. If you have the user manual, there are instructions as to how you adjust the level and slope of the control curve.

If the boiler comes on when it should be off, the set-back temperature is too high.

If rads are hot when the TRV is set to a low number, the TRV may be stuck. Remove the head and check that the pin protruding from the body can be pressed down (use an appropriate tool, e.g a piece of wood) and springs up when released. Tapping the side of the valve body may release a stuck pin.

 

[Colin Parkinson]

Thanks everyone for your replies. I have been on to Viessmann today. It turns out the setback temperature was too high, and the remote was not talking to the boiler properly.