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Immersion diverter - can these confuse the app "usage" data?
lakelandfolk replied to MrTWales's topic in Photovoltaics (PV)
Many thanks John -
Immersion diverter - can these confuse the app "usage" data?
lakelandfolk replied to MrTWales's topic in Photovoltaics (PV)
Thank you, will look at possible supplier. If it does what we want then no point in paying the £350/400 for an Eddi when our objective can be achieved via a more basic bit of kit. -
Immersion diverter - can these confuse the app "usage" data?
lakelandfolk replied to MrTWales's topic in Photovoltaics (PV)
Octopus are installing our ASHP as we speak and are fitting a 250L cylinder with 1 immersion heater. We had an Iboost ( which is now goosed ) in our previous set up, 6.5kwh solar + 19.8kwh battery storage and Direct UVC with 2 immersion heaters, surplus solar and off peak grid, it was brilliant . We would like to make use of surplus solar and off peak grid again but 1 immersion element presents a problem. Would this Runhu unit be capable of automatically switching between surplus solar during the day to off peak during 12:30 and 4:30? or would we need a higher spec product such as Eddi to achieve our aim? -
Position of UVC expansion vessel?
lakelandfolk replied to lakelandfolk's topic in Boilers & Hot Water Tanks
Many thanks, The cylinder is going to be just 1165mm high so I can see that the correct positioning of the tundish will pretty much rule a lower position for the EV -
Hello, Does an expansion vessel have to be fitted above the top of the cylinder? Could it be fitted lower down, say at half the height of the cylinder or even level with the base of the cylinder?
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More Octopus ASHP questions.
lakelandfolk replied to lakelandfolk's topic in Air Source Heat Pumps (ASHP)
Yes, I think we might have space in the boot room for e vertical 200/250L version, but again could we make use of the Solar IBoost? Does anyone manufacture a vertical with 2 x immersion bosses? -
More Octopus ASHP questions.
lakelandfolk replied to lakelandfolk's topic in Air Source Heat Pumps (ASHP)
The attached image is for a Seconrenewables trade Horizontal ASHP 200L cylinder which would fit our space. Our existing cylinder is 210L and more than adequate so capacity would be fine. It has 2 x immersion heaters so I am hoping it would allow me to connect my existing PV Solar IBoost. ie one heater to surplus solar and one heater to off peak grid. 1. Would that cause any problems with the functions of the pump? Presumably the IBoost would take care of the legionnaire cycle. I want to present this option to Octopus when they come back to do a second survey -
I have upgraded the 3 radiators that Octopus specified myself and they are coming back to check. I have also requested that they install the pump outside our conservatory/boot room instead of below the window of our ground floor bedroom. Pipe work will be almost identical and power supply cable 10 metres less. I have also requested that they install a horizontal cylinder in the in the conservatory/boot room in place of their proposed bedroom wardrobe. The later will will cause the loss of valuable storage space and generate additional heat into a bedroom that is already extremely hot during the summer months. Octopus have so far said that they do not have access to a horizontal cylinder in their kit of parts . Another survey is to be arranged and I have offered to source a horizontal cylinder if they are unable to acquire one, there are several suitable ones on the market. I could source a cylinder with 2 or even 3 immersion heaters and would like to continue to use our Solar IBoost, ie surplus solar and off peak grid, and legionnaires control. Would that work? Would that impact on the pump functions? Would there be any issues if the pump was not required to operate for say, 5/6 months of the year? We currently run the house via Solar (plus batteries) and off peak for circa 6 months
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Octopus ASHP Quotation info
lakelandfolk replied to lakelandfolk's topic in Air Source Heat Pumps (ASHP)
First of all thanks to everyone for your interest and advice. Next I need to apologise in advance for my next questions, I feel so dumb sometimes. Still in negotiations with Octopus re ASHP design and cost. My earlier query was about keeping the SolarIBoost, OK we have to take a new cylinder to qualify for BUS. 1. Would it be technically possible and safe to connect the IBoost to the new ASHP cylinder single immersion heater? 2. Is there a timed/switching device available that would, at pre set times, connect the power from the IBoost to the immersion heater. ie 12:30am to say 2am from the grid cable and then switch at say 9am and connect to the available solar cable? So we would have 2 cables from the IBoost into the timer/switching device and 1 from the device to the immersion element. I also notice that the Octopus design includes a buffer tank with an immersion heater, could that be utilised via the IBoost? Why does the buffer need an immersion heater? -
Octopus ASHP Quotation info
lakelandfolk replied to lakelandfolk's topic in Air Source Heat Pumps (ASHP)
I am still in discussion with Octopus re ASHP quotation. We have a spare 32a RCBO in the CU but Octopus say they can not use that but need to take the ASHP electricity supply direct from the external meter box. We have Solar PV and 19kw battery storage. If the supply is taken from the meter as suggested will that not bypass the batteries? We thought the batteries would help to mitigate ASHP consumption. The proposed pump is an 8kw Daikin, what size cable would be required for a 20m run? -
Pre installation.pdfRadiator Scedule - address.pdfOctopus ASHP quote.docx First of all let me apologise, my computer tech skills are somewhat lacking. The full quotation is about 25 pages but I have tried to list only those with technical and financial information that might be of interest. My lack of computer skills means some pages are in word and some have been scanned. I hope you are able to view them, if you want more info just ask. In an earlier post I mentioned that I wanted to keep the existing OSO 210L direct electric heated UVC and Solar I Boost, which is only 9 months old and performs really well. Octopus say no, we need to supply and install a new cylinder. I also feel that some of the radiator upgrades will provide very little additional heat but add a sizeable chunk to the costs. I am minded at this stage to take the heating calculations to a local installer who might be prepared to supply/install an ASHP heating system without the DHW cylinder.
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Octopus energy launch 'their own' Heat pump
lakelandfolk replied to Post and beam's topic in Air Source Heat Pumps (ASHP)
Hello, My Octopus ASHP quotation has landed. Not sure if it is allowed but I am happy to post some of it for your crits. It's over 25 pages but I have cut out all the legal/marketing stuff and have about 10 pages of tech info. A couple of issues at first reading are they have recommended rad upgrades that appear to offer very little extra output at a very high cost. Also, I installed a direct UVC and Solar I Boost about 9 months ago and it is working really well and I would like to keep it but Octopus say it must come out. I thought an ASHP installation could be designed to operate CH only? Let me know if it is OK to post selected info from the quote, I don't want to cause any problems, data protection etc. I will try to scan and post the relevant pages which will not include name/address etc. Might be a challenge for me but I will give it a go. -
Octopus energy launch 'their own' Heat pump
lakelandfolk replied to Post and beam's topic in Air Source Heat Pumps (ASHP)
Yes, I was very impressed he was extremely thorough, an ex heating engineer, (knees exhausted) knew his stuff and happy to explain the practicalities of the installation work. -
Octopus energy launch 'their own' Heat pump
lakelandfolk replied to Post and beam's topic in Air Source Heat Pumps (ASHP)
"I am sorry for the delay in getting you your quote. Due to the unique nature of your house ( the fact it is so well insulated and eco friendly ) we are having to do manual calculations in order to accurately design the system for your property rather than using our software systems to help." Hello, Octopus did an ASHP survey ( 3.5 hours) a few weeks ago and sent the above email 2 days ago. I fitted a direct UVC + IBoost to harvest excess solar PV. Works really well, so asked the Surveyor if we could keep that and have the ASHP to run our radiators only. This would require only one radiator to be increased in size. He felt it would not be possible as Octopus supply a "standard kit" I will post details of my quotation when it arrives for your very welcome crits -
OK, thanks