no hot water or central heating


Postby wild » Thu Nov 22, 2007 11:43 am

Hi, I have had a new boiler installed about 6 weeks ago. First the radiators went cold, and now I do not seem to have hot water either. The boiler seems to be working fine . The heating engineer seems to think that the valve is faulty, but would that have an effect on the hot water?
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Postby DONFRAMAC » Fri Nov 23, 2007 12:07 am

New boilers are usually combi's, and they need at least 0.5 bar system pressure when idling, and run at 1.5 bar on average when on duty. (1 to 2.5 bar is Ok)
My boiler has a detachable filling loop (braided hose), which fits below the wall-mounted unit, and allows top-up with mains water.
Excess pressure causes blow-off at 3 bar, and shows a fault code which needs to be reset, as would a low pressure fault code, after fixing the error. Then you set the duty selector to your desired position.
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