1650s five bed house

RE: 1650s five bed house

MuscatBlue · 2021-11-23T20:36:19Z

Hi All, We live in a 1650’s, 5 bed house (365m2) on the Warks/Leics border. Both daughters are employed in the ‘Renewables Industry’ so it was a no-brainer to switch over from oil to ASHP. However, our most recent monthly electricity bill from Bulb (😳) for mid-Oct to mid-Nov was £403 (ouch!). (£146, £143 & £122) in preceding 3 months). In view of this latest bill, I need advice / help on how to run the system optimally. - How to amend the flow rate - I currently isolate rooms not in daily use but a) Is this efficient b) Does it actually save any money - I currently turn the thermostat down overnight but again is this a false economy I anticipate the above may be recurring themes already addressed elsewhere on the hub so apologies in advance. Cheers, Andy NB. We also have an array of solar panels with FIT payments in part easing the pain of the electricity bills plus a solar i-booster.

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Air Source Heat Pumps (ASHPs)

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Kev M

(@kev-m)

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Joined: 5 years ago

Posts: 1276

02/12/2021 4:04 pm

@muscatblue

Andy,

thanks for the replies. As @derek-m says, you need to find out how the system is working now. In my admittedly non-scientific trials, I've concluded that keeping the ASHP running most of all of the time is probably not much more expensive than switching it on and of with thermostats but is much more pleasant. The trick is get it to heat your house enough with the lowest flow temperatures you can.

Where is says 45C flow temp on the MCS certificate, that will probably be the average (of leaving and return) flow temp at which your design room temp (on the MCS spreadsheet but will be 19-21C depending on the room) will be met at the design outside temp (which will be something around -3). When it's higher than -3, or you don't mind your room a bit colder, flow temp can be less.

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

02/12/2021 5:25 pm

@muscatblue

Hi Andy,

I have managed to locate some manuals that show details about the programming parameters, but not clearly how to adjust them. Are you comfortable about making adjustments yourself?

Below are links to the manuals.

SOLFEX.CO.UK "http://www.solfex.co.uk/uploads/downloads/Yutaki_M_UK_Specific_Installation_Manual.pdf"

http://www.solfex.co.uk/uploads/downloads/Yutaki_M_UK_Specific_Advanced_System_Controller_Reference_Guide.pdf

If you feel comfortable about making adjustments yourself, I may be able to guide you through the process, failing that it may be best to call your installer to go through the parameter settings with you.

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Derek M

(@derek-m)

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Joined: 5 years ago

Posts: 4425

02/12/2021 5:45 pm

@muscatblue

Hi Andy,

The setting procedure for the weather compensation is shown on page 34 of the manual in the link below.

Ignore the setting of water flow temperature of 37C at 15C ambient temperature, which apparently was to keep his wife happy, because she did not like feeling cool radiators.

DOWNLOAD-FILES.WIXMP.COM "https://download-files.wixmp.com/raw/08c595_ab2c581e77dc4d50b622c731385be84b.pdf?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJ1cm46YXBwOmU2NjYzMGU3MTRmMDQ5MGFhZWExZjE0OWIzYjY5ZTMyIiwic3ViIjoidXJuOmFwcDplNjY2MzBlNzE0ZjA0OTBhYWVhMWYxNDliM2I2OWUzMiIsImF1ZCI6WyJ1cm46c2VydmljZTpmaWxlLmRvd25sb2FkIl0sImlhdCI6MTYzODQ2NjAzMiwiZXhwIjoxNjM4NDY2OTQyLCJqdGkiOiJhMzU5YjViZTNkYzgiLCJvYmoiOltbeyJwYXRoIjoiL3Jhdy8wOGM1OTVfYWIyYzU4MWU3N2RjNGQ1MGI2MjJjNzMxMzg1YmU4NGIucGRmIn1dXSwiaW5saW5lIjp7ImZpbGVuYW1lIjoiSGl0YWNoaSBJbnN0YWxsYXRpb24gTWFudWFsIDIwMjEgZm9yIHdlYi5wZGYifX0.qri06qdcjvmBsT0d3-6bWuiBAJ-QEfg_XOfB43CP6_s"

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