Grant Areona 17kw questions/concerns

Daniel · 2023-10-06T14:13:30Z

Hello all wondering if it is possible to add monitoring to my heat pump? Was installed a few years ago by Greener Energy and to be honest the performance has been crap. All the radiators were changed along with the hot water cylinder. Things I notice are struggling to get inside temps above 19c without it running full bore all the time also if heat is not on notice the rads get warm when calling for hot water. Checked the CH zone valance and that’s ok so figure the piping is not correct. Also wanting to get rid of the Tado controller and use just the grant controller as from what I have seen on here that is the way to go for best efficiency. Problem is they installed that in the room above the garage which isn’t heated so would need moved presumably. Any help or advice is greatly appreciated! I can also try and get some pictures of the piping setup if that helps.

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Air Source Heat Pumps (ASHPs)

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Derek M

(@derek-m)

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11/10/2023 10:03 pm

Posted by: @daniel

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@derek-m will have a look at that tomorrow. I do know they were all replaced with Purmo ones I believe as had column cast iron sort of ones before. I know some of them were replaced with larger and in the case of my second sitting room they added another one. Basically all windows in there.

Directly after the valves it goes down to 22mm copper as they just basically cut the boiler out and put this in exactly how the oil boiler was piped. Guy who built the house was apparently a plumber but to be honest I have done better work myself haha. At some point I plan on doing the whole ground floor in underfloor and replacing the glass wool in the joists with kingspan type insulation. Though want to do that in tandem with a new kitchen as the ground floor pipes start in the kitchen. So figure that would be a good time to do it. Looking at the Nuheat pre routed floor boards that just came out. May go with screed as well. Plenty of time to decide though.

Is there a guide on here for doing your own heat loss calculations?

Is the 22mm pipework before it splits for upstairs and downstairs?

There is a heat loss calculation spreadsheet on the MCS website so I believe.

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Daniel

(@daniel)

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Topic starter 17/10/2023 4:29 pm

@derek-m basically goes to 22mm after the valve. Been pretty busy lately and haven’t had a chance to check rad sizes and such yet.

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Derek M

(@derek-m)

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17/10/2023 4:57 pm

Posted by: @daniel

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@derek-m basically goes to 22mm after the valve. Been pretty busy lately and haven’t had a chance to check rad sizes and such yet.

No problem.

So the limiting factor as far as flow rate is concerned could be the valve or the 22mm pipe.

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