(Carl) wrote in
om:


If it is my 3 port valve (how do I know if I have one)?? How do I
locate it??
etc etc.

Any help appreciated!

Carl

It's between the boiler and the HW cylinder, a T shaped fitting, (3
pipes, 3 ports, geddit)

One pie from the boiler, one to the side of the cylinder, and one goes
off to the rads.......

http://www.tlc-direct.co.uk/Products/TLMP3.html for a picture.

Your accident is not likely to have caused damage, except maybe to the 3
prt valve, which we suspect anyhow, as the pump and boiler still
function.

The central heating will work, in one scenario, because the cylinder is
calling for heat, and that fires the boiler and pump regardless, and
takes the CH with it if the room stat is operating, but if *only* the
room stat is calling for heat, the boiler is called indirectly via a
microswitch on the 3 port valve, and this is where the failure is.

Some wiring diagrams here; http://www.gasman.fsbusiness.co.uk/wiring.htm

Check out Y plan in particular

It's important that you find out if your system is fully pumped, or
gravity HW, for the assembled team of experts ;-) to help.

mike