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Three Way Valve, No Dhw Off On My New Controller
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<blockquote data-quote="Doc Hudson" data-source="post: 303173" data-attributes="member: 1607"><p>Any reputable electrical stockist should be able to source most types of relays. The key things you will need is the correct operating voltage for the coil &amp; suitable amp ratting of the switch contacts. I assume your new controller outputs a 230V DHW on, so you would need a 230v rated coil. Most central heating systems a happy working off a 3A or 5A fused spur, so providing the switching contacts can operate a 3A load you should be OK. It will all depend upon how the existing system is physically routed and wired as to the best location for this relay, but it will most likely need a separate enclosure to mount it into as most standard CH wiring boxes barely have enough room for the cable terminations let alone adding relays.</p><p></p><p>It could be argued that this work is notifiable under part P, as central hearting wiring is within the scope of part P. A straight like for like swap of a controller is not notifiable, but some would interpret your proposed modifications as being not direct like for like replacement. You will need to make your own decision on this aspect. Ref info can be found here, page 9 bullet point n. <a href="http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_P_2010.pdf" target="_blank">http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_P_2010.pdf</a></p><p></p><p>Doc H.</p></blockquote><p></p>
[QUOTE="Doc Hudson, post: 303173, member: 1607"] Any reputable electrical stockist should be able to source most types of relays. The key things you will need is the correct operating voltage for the coil & suitable amp ratting of the switch contacts. I assume your new controller outputs a 230V DHW on, so you would need a 230v rated coil. Most central heating systems a happy working off a 3A or 5A fused spur, so providing the switching contacts can operate a 3A load you should be OK. It will all depend upon how the existing system is physically routed and wired as to the best location for this relay, but it will most likely need a separate enclosure to mount it into as most standard CH wiring boxes barely have enough room for the cable terminations let alone adding relays. It could be argued that this work is notifiable under part P, as central hearting wiring is within the scope of part P. A straight like for like swap of a controller is not notifiable, but some would interpret your proposed modifications as being not direct like for like replacement. You will need to make your own decision on this aspect. Ref info can be found here, page 9 bullet point n. [URL="http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_P_2010.pdf"]http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_P_2010.pdf[/URL] Doc H. [/QUOTE]
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Three Way Valve, No Dhw Off On My New Controller
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