can any one help ,updated heating controls for seperate control of heat/water there is a isolating valve on a pipe coming from the bottom of the hot water cyclinder going to the 22mm pipe just above the water pump but below the mid position valve not sure if this valve should be open or shut .
when open all works well except the last 2 radiators ie, dining/frontroom, dont get very warm but if i close the valve all the rads get hot after about 25 minutes and then the boiler shuts down and it will only allow me control of hotwater until the next day . all the controls are new and the old programer use to have hotwater only/ heating/water together am i right in thinking this is a y plan system and can anybody tell me if the valve should be open/shut and what the hell its used for cheers
ps. can send photos but need your email address because cant work out how to post pics on forum . dave

dave, April 2007

NEDS 2 B OPEN DONT HAVE PICS BUT TRY BLEEDING RADS THAT R NOT WORKING PROPERLY !!!!!!!!

DAVE, May 2007

a better answer may be to swap it for an automatic bypass valve, then you wouldnt have to adjust it so finely for balancing heating/hot water because it does it all itself.

gtheak, April 2007

send some pics hispecplumbing@yahoo.co.uk

hi-spec plumbing, April 2007

I THINK (note THINK) that this valve is to balance the system when the Y plan is open for both curcuits.

If the valve is closed it will 100% be heating only. If open the water will obviously find the shortest route,and may prefer the hot tapwater as opposed heating the rads.

I think you will have to carefully use this to balance the system water : rads.

Steve, April 2007