Hi all,
I've just moved into a house where the heating system seems a little unconventional. We have a Viessmann Vitodens 100W boiler (which I believe is a combi type) controlled by Hive.
The bit I'm finding weird is that we also have a hot water cylinder. When the heating is off and the cylinder is not being heated the boiler is essentially off (nothing on the screen). It only comes to life when hive decides to heat the hot water cylinder or radiators. All of the hot water taps are fed from the cylinder, not the boiler, pressure in the upstairs hot taps is poor except in the main bathroom where the shower, bath and basin have a pumped supply.
When the boiler is running it shows the central heating symbol regardless of whether it is heating the hot water or radiators, I think there is a diverter valve in the airing cupboard that actually switches the water circuits. Is it normal to set up a heating systems in this way? It looks as if the hot water on-demand aspect of the boiler just hasn't been used and the heating circuit is doing everything.
We had a combi in our previous house and it used to overrun for a few seconds, I guess for its own safety. Our current boiler switches off the moment Hive decides it's not needed. We have hot water and central heating so mustn't complain but I'd like to know if the installation is a bit of a bodge and whether to expect any problems in the future.
Thanks,
Tesh
I've just moved into a house where the heating system seems a little unconventional. We have a Viessmann Vitodens 100W boiler (which I believe is a combi type) controlled by Hive.
The bit I'm finding weird is that we also have a hot water cylinder. When the heating is off and the cylinder is not being heated the boiler is essentially off (nothing on the screen). It only comes to life when hive decides to heat the hot water cylinder or radiators. All of the hot water taps are fed from the cylinder, not the boiler, pressure in the upstairs hot taps is poor except in the main bathroom where the shower, bath and basin have a pumped supply.
When the boiler is running it shows the central heating symbol regardless of whether it is heating the hot water or radiators, I think there is a diverter valve in the airing cupboard that actually switches the water circuits. Is it normal to set up a heating systems in this way? It looks as if the hot water on-demand aspect of the boiler just hasn't been used and the heating circuit is doing everything.
We had a combi in our previous house and it used to overrun for a few seconds, I guess for its own safety. Our current boiler switches off the moment Hive decides it's not needed. We have hot water and central heating so mustn't complain but I'd like to know if the installation is a bit of a bodge and whether to expect any problems in the future.
Thanks,
Tesh
