boiler trouble
Posted: Sun Feb 15, 2009 4:21 pm
hi guys i went to put some trv's on my freinds system a warm front installation as in a previous post its a vaillant eco tec 824 problem is all the flow pipes get hot but returns stay cold so i thought it was a problem with air in system so i bled all rads which were fine and tried to vent the pump but wen i released the vent screw water was pouring out which i thought was a problem with the bearings but i must be wrong its a brand new boiler ? also they av fitted 2 filling loops ? and also wat appears to be a xternal bypass valve but the m.i. says it is built in and no need 2 fit one n cud that be the problem as the flow pipe gets red hot and the return pipe gets hot at the top until it hits that valve then from there barely warm but the pipe linking the flow n return with the valve on gets red hot ? its as so the hot water isnt getting passed the valve ? sorry 4 long post just hope someone has n idea ? thanx bazza