Central Heating question

pstones578

Can someone please answer a question about my central heating system. Have a look at this picture.

http://i606.photobucket.com/albums/tt146/pstones578/Heating%20System/Heating.jpg

A is the thermostat that we use to tell the system what temp we want, it's set to 24C. B is the heating boiler. At the bottom of the heating system is a panel (shown in picture C), which we have set to 6 (this is the max). The house temp is under 19C at the moment even though the heating has been on for hours ~ approx 5 hours. Picture D shows another thermostat that is set to it's lowest of 3, this can be seen on picture B too at the top left. Does anyone know what this thermostat is for as I'm wondering if I need to turn it up to get the overall temp of the system up?

Mr_Warren_2

Both A and C are room thermostats but why is C so close to the boiler !!????..... Where is A placed compared to C ?

keith969

D looks like a frost stat - if the temp goes below the setting, the boiler will come on to stop the system freezing.

pstones578

Mr_Warren wrote: »

Both A and C are room thermostats but why is C so close to the boiler !!????..... Where is A placed compared to C ?

A is in the porch at the front door. C is part of the heating system.

keystone

Mr_Warren wrote: »

................. but why is C so close to the boiler !!????

Because its part of the boiler controls?

keystone

espresso wrote: »

After being on for five hours, your house should have reached the desired temperature set on the stat in picture A, even with minus temps outside.

Not if the rads are fitted with TRVs and the TRVs are shutting off at a lower temperature it won't.

Cheers

keystone

pstones578 wrote: »

Can someone please answer a question about my central heating system. Have a look at this picture.

http://i606.photobucket.com/albums/tt146/pstones578/Heating%20System/Heating.jpg

A is the thermostat that we use to tell the system what temp we want, it's set to 24C. B is the heating boiler. At the bottom of the heating system is a panel (shown in picture C), which we have set to 6 (this is the max). The house temp is under 19C at the moment even though the heating has been on for hours ~ approx 5 hours. Picture D shows another thermostat that is set to it's lowest of 3, this can be seen on picture B too at the top left. Does anyone know what this thermostat is for as I'm wondering if I need to turn it up to get the overall temp of the system up?

If your radiators are fitted with Thermostatic Radiator Valves and you had them set to (say) position 2 for the milder weather they will still shut off when the room temp reaches that determined by position 2.

No amount of fiddling with boiler controls and other stats will affect that TBH.

Suggest you try turning up your TRVs to a higher setting and see what difference that makes.

Cheers

The_Pedant

Where is the boiler positioned?
Judging by the low numbers on it, I'd guessing it's a frost-stat. It'll turn the heating on if the temp drops below what you've set it to. Looking on the Drayton site, this appears to confirm this:-
Product RTS 3 : Frost Thermostat 3°C to 10°C

Very common in offices etc to kick the heating on in the evening & weekends to stop pipes from freezing. If the boiler is in a loft space or somewhere a lot colder than the rest of the house, then it'd kick in if it got too cold, to help prevent burst pipes etc.

keystone

espresso wrote: »

Which is why I asked if alls rads are getting hot. Unlike you, I'm assuming that the OP is not stupid.

:rolleyes:

Au contraire thats NOT what you said at all - may have been what you meant to say but not what you did say.

If I thought the OP was being stupid no doubt I'd have used the sarcasm icon but I don't assume anything and I don't think the OP is stupid at all. Theres no reason to be offensive because I've articulated something you forgot to put in or didn't actually think of.

In any event my post was in relation to something you wrote. You'll have noticed I asked a similar question of the OP in a somewhat different manner. Did I assume he was stupid in that one?

You have a nice day now won't you!

Cheers

pstones578

espresso wrote: »

Picture D is a frost stat to protect the boiler as it is mounted in a garage/outhouse, so ignore that.

Are all of your radiators piping hot all over? Do they need bleeding? Are they hot at the top and colder at the bottom? After being on for five hours, your house should have reached the desired temperature set on the stat in picture A, even with minus temps outside.

All the radiators are piping hot and I can confirm that the radiator's own thermostats are on full whack

keystone

pstones578 wrote: »

All the radiators are piping hot and I can confirm that the radiator's own thermostats are on full whack

In other words the CH system is working fine then and this looks like an issue of heat loss. Not much you can do with your heating controls to change that.

Cheers