Glow Worm Compact electonique

Have a read of the section on filling points here:

Thanks for that link;

As for the boiler I found a knob (red) which access to is very tricky, I'm not sure this is to fill the system; i tried to turn it a bit and noticed that it was getting hot. In fact the valve is connected to an earth coming pipe and the other gate of the valve is connected to the main heaters network pipe in which flows the heated water ( i.e. not the return water from heaters).

does someone know abt this boiler? In my room temperature is 13=B0;

That sounds like it could be your boilers over pressure blow off valve - you don't want to go fiddling with that.

What is an "earth coming pipe"?

You could probably download the manual for it from the gloworm web site.

Sounds a bit chilly.

Note that many boilers don't have a filling loop built in. So don't necessarily expect to find anything to do with filling the system on the boiler itself (perhaps except a pressure gauge). It is usualyl something extra that the installer adds to the pipework of the system when it is installed. It ought to be near the boiler - but might not be.

Might look like:

I know we can fill it; the landlord of this house comes sometime to fill it; he does it with hands only; no use of any tool; I think the red knob I found is the right one but I don't understand why the hot water come when turning it; since it is to fill under pressure the system only the cold water should flow;