Quote:
Originally Posted by heero_yuy
Should be part of the original installation and set up during commissioning. Not necessarily obvious and as its name suggests that you can't obviously see the valve as it's covered by a domed shield. Radiators a long way from the pump would have their valves well open whereas those close would be shut down to balance the flows correctly.
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There was 2 major faults with the installation of 7 years ago. The flue siphon wasn't set up correctly so was dangerous, and the thermostat was wired up incorrectly so that it was always on. I didn't know until the annual gas check, as I had disabled the heating because I had noticed it was on in summer when I first move in.