vitosolic 100

[sdiluca]

Hi all,

I´m a Viessman customer. One year ago I bougth a Vitosol kit and all works fine until this week: the kollector themperature is very high (120-130 celsius degree) but the water is cold (22-24 celsius degree).

My plumber says me that there is air into circuit, and  in order to resolve the problem, recharged the circuit,

but after few day the issue occures again.

I think there is a problem with the air relase valve. It´s placed near the Vitocell 200 and not near Vitosolic pannel,

it's rigth ?  It's this the problem ? How can I remove the air into the circuit , without have to call my plumber all times and recharge again the circuit ?

Thanks in advance  for the support.

Stefano.

[qwert089]

Hi Stefano,

normally not air, but a steam bubbles are the problem in solar thermal systems.

The reason for the steam bubbles could be a oversized collector, to less hot water consumption, failure in the solar circulation pump or the pump controller.

In your case the Boiler water is cold, I would suggest a problem with the pump or controller.

After your plumber recharged the solar fluid, did you check the flow-rate on the Taco setter? was there a flow? Does your system have a taco setter, Viessmann systems normally have one.

If there is no release valve at the collector you need this special pump to flush the whole system.

BR

[sdiluca]

I called Viessman manteiner, maybe the solar circuit pressure was too low: the collector distance from heater is 10 meter, and we had a 2,5 bar. Now their set the circuit at 4 bar and the system works fine. The collector temperature is never over 75-80 celsius degree and the hot water goes 60-65 degree.
Thanks a lot again for the explanation.