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Post by cathoderay on Jul 18, 2021 11:20:26 GMT
Hi all what control s would you use installing an unvented cylinder heated by a communal heating service? Never fitted one off a communal hot yet. Usually the cylinder would call for heat and fire the boiler and open the 2 port but there's no boiler to fire, I guess the cylinder has to open a 2 port via a controller without the boiler control connection. Am I missing anything?
Thanks. Ray
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Post by battle1066 on Jul 18, 2021 16:54:15 GMT
Evening Ray.
Never worked on one but there coming to our area currently, although it's going to be A geothermal source, so future fun in the pipeline.
I assume each property has its own heating interface unit (HIU) which you will have access to to control on demand from your programmer or cylinder control via either two or three port system as heating will still have to be managed.
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Post by cathoderay on Jul 18, 2021 17:18:32 GMT
Hi battle nothing as fancy as a hiu, it's a 70s block with a communal boiler in the basement. They have an ancient electric immersion direct which means they're not using the communal boiler to hear their water so just an indirect on the communal heating circuit.
But how to control it?
(Belting weather today!)
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Post by crowsfoot on Jul 18, 2021 18:15:46 GMT
It would be difficult to get round the 3rd unvented safety device requirement of supplying a thermal cut out on the main heating device if any unvented cylinder was ever heated from a universal boiler.
Interface units are the more popular units that are fitted to commercial properties these days that have their heat fed from a central boiler.
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Post by cathoderay on Jul 18, 2021 18:44:01 GMT
Thanks CF, what about a thermal store??
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Post by tomplum on Jul 18, 2021 20:37:44 GMT
Thermal stores ( sludge buckets) are a poor relation to unvented systems, you could always heat the cylinder from immersion heaters from the house/flat its in,
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Post by cathoderay on Jul 18, 2021 21:10:40 GMT
I'm going to measure up this week so thanks for all the suggestions. 👍
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Post by crowsfoot on Jul 19, 2021 16:15:14 GMT
Thanks CF, what about a thermal store?? I've never actually fitted one, however, if it's an unvented cylinder thermal store then the same set of safety rules will still apply. |
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Post by dickpuller on Jul 19, 2021 17:46:39 GMT
Depending on the communal F&R temperatures, Delta T, flow rate etc.
Plate Heat exchangers maybe your answer👍👍
Have a look at my set-up in Puller Towers, this eliminates the need for a shower pump.
Look in Utube for Fibre Washer, that’s my very good self👍👍
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Post by tomplum on Jul 19, 2021 18:23:32 GMT
This is the Dick Puller instant hot water shower that he fabricated form a plate heat exchanger that gives, a realy good shower ( Oliver Puller) told me that,
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Post by cathoderay on Jul 19, 2021 19:27:43 GMT
Thanks CF, what about a thermal store?? I've never actually fitted one, however, if it's an unvented cylinder thermal store then the same set of safety rules will still apply. Thermal stores aren't pressurised so don't come under G3 so I think different rules will apply but I stand to be corrected. |
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Post by cathoderay on Jul 19, 2021 19:34:39 GMT
Depending on the communal F&R temperatures, Delta T, flow rate etc. Plate Heat exchangers maybe your answer👍👍 Have a look at my set-up in Puller Towers, this eliminates the need for a shower pump. Look in Utube for Fibre Washer, that’s my very good self👍👍 Very interesting Dick, what's in the white box? |
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Post by cathoderay on Jul 19, 2021 19:38:30 GMT
Depending on the communal F&R temperatures, Delta T, flow rate etc. Plate Heat exchangers maybe your answer👍👍 Have a look at my set-up in Puller Towers, this eliminates the need for a shower pump. Look in Utube for Fibre Washer, that’s my very good self👍👍 Very interesting Dick, what's in the white box? Is Millward genuinely having a pop in the comments? |
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Post by crowsfoot on Jul 19, 2021 20:45:55 GMT
I've never actually fitted one, however, if it's an unvented cylinder thermal store then the same set of safety rules will still apply. Thermal stores aren't pressurised so don't come under G3 so I think different rules will apply but I stand to be corrected. Spot on Ray they've not been invented just yet - but when they are....  ! |
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Post by crowsfoot on Jul 19, 2021 20:54:00 GMT
This is the Dick Puller instant hot water shower that he fabricated form a plate heat exchanger that gives, a realy good shower ( Oliver Puller) told me that, Lots of plumbing experiments to be found in most plumbers homes! Shows just what you can do with things though if you can use a bit of ingenuity. |
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