Wireless thermostat, radiator temperature confusion!

jobi7898

Hi
I had a new boiler fitted in October (Glow worm Betacom 30c) and to operate it a wireless room thermostat (CM927).
The thermostat is situated in the living room that has no thermostatic radiator valve. All the other radiators in the house are set to maximum.

The radiator in the living room gets hot quickly so shuts down (quite noisily too) but upstairs is still quite cold as the radiators are not as hot and it is getting turned off by the thermostat downstairs.

Also in summer I would not want the heating on downstairs as too warm but could do with just the bathroom radiator on slightly to dry towels, will this not be possible?

Do you think I need (if possible) to get a thermostatic valve fitted to the living room radiator? (there was one originally but it was taken off when this system was fitted).

Technology is so confusing! Would appreciate any help.

Thanks
Jo

swagman

It is normal practice not to have a thermostatic valve on the radiator in the space where the main thermostat is fitted.

Our system had the main thermo in the living room but we moved it to the hall for exactly the reasons you are finding - the rest of the house got too cold. The hall siting works well.

Larger properties can have zonal systems whereby different parts of the building have their own temperature controlled zones.

jobi7898

Thanks for the reply.
I thought that if I move it to a colder room it would get too hot in the living room as it's trying to get to the target temperature.
I'll give it a go and see what happens.
It's only a small property so I don't think it would be worth geting a zonal system installed.

Thanks again
Jo

adaze

If you do try this, you might get odd results with the thermostat and TRV being in the same room, i.e. radiator says it is warm enough so switches off, thermostat is still saying more heat so heating stays on.....

Zonal heating is the way to go, doesn't have to be a large house, we have seperate zones for underfloor and rest of the house. Not too expensive if you do it yourself, but could be a bit of upheavel (sp?) and a drain down would be required...

adaze

jobi7898 wrote: »

Thanks for the reply.
I thought that if I move it to a colder room it would get too hot in the living room

True, you might be able to fiddle with the valves to keep the temperature operating at a lower temp, wouldn't be as good as fitting a new TRV, bit of a chicken and egg situation

latecomer

Are you sure the system is properly balanced? IF all other radiators are at max then the rooms shuold be getting hot.

jobi7898

latecomer wrote: »

Are you sure the system is properly balanced? IF all other radiators are at max then the rooms shuold be getting hot.

That's what I thought! I think I better give the fitter another call and see what he thinks. He did fit all new radiator valves when we had the new boiler fitted.
Thanks for the advice.

macman

As a temporary workaround you can use the feature on the Honeywell CM927 called Temperature Offset (in the installer menu). This allows you to adjust the measured/displayed temp up or down by 3C. In your case, adjusting it down by 3C would make the programmer think the living room is 3C colder than it is, so it would shut down later.
But overall it does seem that your system is not properly balanced.