Bleeding CH System .

[Stuart]

Having just refilled my CH system( pumped heating gravity domestic) after having replaced the heat exchanger gaskets and some pipework around the HWC I was beeding the system after refilling it ..As previously the pump caused /is causing me some bother .Is there a specific procedure ...is it bleed rads then the pump or the other way round or a bit of both until its sorted . When bleeding the pump should the bleed screw ( which is on the front vertical face ) be opened slightly or opened a lot ...I keep hearing air when I switch on the heating after its been off for a while even tho' the water out the bleed screw seems to have run freely .... Stuart

[mike ring]

Stuart wrote in news: [e-mail]:

Is it possible your pump is in a loop that can trap air, and not at the top of the loop? (Mine is)

If so you may need a bleed point at the top of the loop

mike