hi, hopefully somebody can help me with this one? ive recently ripped my bathroom out and im currently replacing it, i drained the central heating system down to remove the rad, its a vented system using a conventional gas boiler, not a combi. ive not refilled the the system yet as i need to adjust the pipework for the new towel rad as im changing the position, however, we no longer have any hot water and when the pump is on it sounds as though it is not pumping anything? the gate valve from the expansion tank in the loft is closed, would this affect the hot water supply? the cylinder is still filling as we are currently using the immersion although id rather get it sorted sooner than later as its going to cost a bomb to leave the immersion on? thanks in advance, trevor. ________ Interracial Censored
Last edited by trevor123 on Sat Mar 19, 2011 8:44 am, edited 1 time in total.
You've probably also drained the primary circuit which heats the water if you have an indirect cylinder. The pump will be on the primary so that's why it's just pushing air. Is there a motorised valve adjacent to the cylinder where the hot from the boiler is either routed to the cylinder coil or the CH or both depending on what the programmer is calling for?
You solution is to adjust your pipework for the new towel rad whilst you have the system drained. Fit the rad valves. Make sure they're both SHUT and refill the system. The you can run as normal until you are ready to hang the new rad and shouldn't need to dreain down again provided you have got the position correct.
the whole system is turned off now apart from the immersion, if both water and heating are set to off then the boiler should no longer fire, correct? what sort of damage could arise please? ________ N73
Last edited by trevor123 on Fri Feb 04, 2011 12:34 am, edited 1 time in total.
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