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Hi all,
Hope someone can help me with this. I have a Vaillant Turbomax VUW 242 (early model without the display) connected to a Nest thermostaat.
The problem I am having is the following; Let's say I put the Nest to 22 degrees C...I can see the heatlink firing up the boiler and both the heating and the circulation pump on the boiler start. Heating continues untill the desired temperature on the boiler is reached and then switches off, leaving only the circulation pump going. So far so good. But then the problem starts...from then on the boiler will fire up for 2 min..then stop...fire up, stop...etc...This untill the Nest senses that the room temperature is 22 C and switches off the boiler all together.
When I asked the technician he said this was normal behaviour ?! According to him every time the boiler temperature drops below the set temperature (on the boiler itself) it will fire up again ?!
I understand that this should be happening, but not for every 2 or 3 degrees it drops below the set temperature. I can only imagine the wear and tear on this thing powering up and down every 2 to 3 minutes not to mention the cost in gas ?
Does anybody else have this experience ? Is this really normally behaviour ?
Also does anybody know what the "normal" CH water temperature setting would be on the boiler itself the lower green dial
Thanks for any help,
Andy
Hope someone can help me with this. I have a Vaillant Turbomax VUW 242 (early model without the display) connected to a Nest thermostaat.
The problem I am having is the following; Let's say I put the Nest to 22 degrees C...I can see the heatlink firing up the boiler and both the heating and the circulation pump on the boiler start. Heating continues untill the desired temperature on the boiler is reached and then switches off, leaving only the circulation pump going. So far so good. But then the problem starts...from then on the boiler will fire up for 2 min..then stop...fire up, stop...etc...This untill the Nest senses that the room temperature is 22 C and switches off the boiler all together.
When I asked the technician he said this was normal behaviour ?! According to him every time the boiler temperature drops below the set temperature (on the boiler itself) it will fire up again ?!
I understand that this should be happening, but not for every 2 or 3 degrees it drops below the set temperature. I can only imagine the wear and tear on this thing powering up and down every 2 to 3 minutes not to mention the cost in gas ?
Does anybody else have this experience ? Is this really normally behaviour ?
Also does anybody know what the "normal" CH water temperature setting would be on the boiler itself the lower green dial
Thanks for any help,
Andy