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Posted By: Ed DaviesFor the low power pump to work a syphon would need to be held in the collectors. So how does the drainback work, then?
Posted By: fostertomSo why can't both be PV powered, as both are only reqd when the sun shines?
Posted By: fostertomDrain back can mean that all the warm water drains out of the panel when the sun goes in and the PV-powered pump stops
Posted By: crusoeEd/wookey: Solar thermal is a notifiable installation, as it involves not just electrical work, but also elements of L1 and G3. The IDHE desribe it thus on their site:"All solar water heating work normally involving additional hot water storage is therefore notifiable to a building control officer ...
Posted By: crusoeUnless you are a solar designer/accredited installer.
Posted By: crusoedjh - point taken, although I did asy it was from the IDHE site, and you found it.....if I was cherrypicking...also a notifiable occupation soon... :)) ...why would I give the reference?
Posted By: crusoeI think you are missing the point djh. You can't have solar thermal unless you HAVE 'additional hot water storage' - ie a new cylinder fitted (for this purpose I am ignoring sidewinders/solar inserts into the 2.25" immersion heater boss or Solartwin (now defunct) type apps, as most people simply do not go there
Posted By: crusoeAlso can't have solar thermal, quoting from B Regs above - unless they conform as follows...
Posted By: Ed DaviesNeither do the English Building Regulations 2010 (SI 2010 No. 2214):
Posted By: crusoe"Building regulation approval is required for solar panel installations, which will consider the suitability of the building for the installation and electrical installation. It is advisable to contact the local authority Building Control Department in the initial stages of the project."
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