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Showing results for tags 'ashp and uvc'.
Found 2 results
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Several months ago I purchased a 210L slimline Ideal Heat Pump UVC. Then completed the UVC training, so I could self install and certify. There will be secondary circulation also. An interesting thread, a while ago, brought up an issue of secondary returns temp being high if you have a mixing valve on the cylinder hot water outlet, as cold water cannot enter what is a sealed system. So what you need is a split in the piping after the returns pump to allow water two different flow paths either to the mixing valve or back to the tank. So although this is a heat pump system and cylinder temps should be now higher in theory than 46 degs, solar excess is being diverted also. So have replicated the above with a little mechanical automation using a Reliance valve and a gate valve. The reliance valve is adjustable to close at an adjustable temperature. So the theory is 1. Secondary returns pump starts 2. gate valve (B) is set to reduce flow going to mixing valve, so all or most flow goes via reliance valve (A) to cylinder, 3. once return temp gets to set point, the Reliance valve closes and all flow goes via the mixing valve The Tee below the mixing valve incorporates a check valve, pipe entering the side port of the Tee is the gate valve (B). Will give an update as things progress
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Hi all, Literally crawling to the finish line but still hitting landmines. Latest is the issue of the size of the UVC. I had requested a 500litre to cater for 5 showers 1 bath house, kids with additional needs, guests if they ever return and my often dirty job requiring a good evening scrub! Daikin is the chosen ASHP due to availability and local knowledge but suppliers differ wildly in what they say will work and what won't. I now have 3 alternative views, when all presented with the same data. But none are willing to specify a 500 litre UVC tank saying 300 is the max on offer, but one offers a 500litre Daikin thermal store. The explanations defy the laws of physics but I require the system to be commissioned correctly for the warranty to be valid. Surely if a 500litre thermal store is acceptable a 500lite UVC should also work. All opinions valued Thanks
