Help with new central heating system

macman

Alibali wrote: »

I dont leave the boiler on all night, I have it on a timer. So it is off completely during the day, and only on for an hour at night and for half an hour before we get up.

It has been quite cold here though, had to scrape the car this morning and a few mornings in the last week or so. However, where I live we are up higher which is why its colder.

Hmm, but you said that it 'only comes on at night when the temp drops'. The timer overrides the other controls, so if the timer is 'off' at night, then it won't come on just because the temp drops.

cbrpaul

The boiler could still come on , even if not called for !!

Most modern boilers have a

BUILT IN FROST PROTECTION STAT !!!

so if the temp where the boiler is located gets too cold , it will protect itself by turnng on !!!

macman

Frost stats are usually only set to come on at 5C by default, down here it hasn't got much below 9C at night yet. Not convinced that is what the OP is referring to.

Pincher

It sounds like the radiators need balancing.

Just to be sure, bleed all the radiators in case of air.

You need to know each radiator has an inlet (heats up first) and outlet.
The TRV is at the inlet end (usually, but my plumber keeps doing it randomly and try to tell me it makes no difference).

The outlet end has the lockshield valve, which you use to increase and decrease the resistance to the hot water. Just know that the hot water is always trying to get back to the boiler through the shortest and easiest route, so the far radiators don't get a look in if you don't redress the balance, and it's pretty obvious what you should do.

Once you get the hang of it, you can play favourites, so some rooms heat up quicker than others. When those rooms are warm, the TRVs will close, and the water will go to the rest. Obviously Harry Potter should get heat last in his closet.