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Denevil
@denevil
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Eminent Member
Joined: Jan 18, 2023
Last seen: Feb 19, 2023
Profile Activity
Topics: 1 / Replies: 13
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Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks FYI we have all brand new pipework and its 28mm, we have the volumiser with the heat element in it and we are getting flow rate of 32 with rad...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Retrofitting: moving to ASHP old oil boiler in large old property - experience/advice please on MSC calcs

We have a 1920's house with a new big extension. We externally insulated and rendered the existing house with 70mm celotex along with high quality mod...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 17kw Grant Aerona heat pump not performing

there is a single pipe in which is primary from ASHP and a single return pipe ... primary circuit is on the right as you face the LLH .... secondary i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

First picture shows a symbol not in the manual (as far as I can tell) so wondering if this is the supplementary heating in defrost cycle. The next p...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

Important was that box EP001 was wired and it turns off the master valve supporting DHW prioritisation (which it wasnt at first) ... this now works an...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

FYI the Grant combined volumiser / low loss header in my system has an immersion. The immersion doesnt connect to EP001 and instead connects directly ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

For the last month I have taken daily meter readings, for my 17kw grant ASHP the least usage being 25th Dec with 37kw/h, the worst being yesterday at ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

As I dont have an electric car and averge less than 30% electric between 00:30 and 6:30 I decided to switch from Economy 7 to single tariff .... now I...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

thanks Derek, we do have a LLH my understanding thats to provide hydraulic seperation of primary and secondary circuits and cope with having multiple ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

The TM1 was 45 degrees ... my understanding is this is the max flow temp at -4 degrees for the weather compensation ... I reduced to 40 to try and see...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

Hi @derek-m From the original spreadsheet before the reneuvation project started This was based on heating flow temp of 50 degrees due to upstai...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

Hi @AllyFish, thanks for the detailed reply, ... I had no idea of the defrost details .... answers follow "17kW ASHP. Who sized it & on what...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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