I have a worcester bosche thermotechnik 240 CCOMBI Boiler RSF.The downstairs radiator bleed screw needs replacing. How do i do this? Here are my presumptions.Turn Water Off, Drain system, replace screw. Then Im stuck.Theres a pipe that joins the Central Heating Return (second pipe from underneath/left) to the Mains Cold Water In.How do i set the taps for this pipe? After turning water back on? Any help appreciated thanks.
No if the radiator bleed screw need replacing you do not have to drain the whole system shut both taps on the radiator one at either end remove screw this will let some water out so be ready for this when it stops remove the bleed screw replace open both taps bleed radiator Then go to boiler the small pressure gage should be some where between 1.5 and 2 bar if not open the tap on the loop from the mains pipe until the gauge reaches this mark shut off tap job done hope this helps
