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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: May 20, 2026
Topics: 24 / Replies: 4855
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RE: Extend the colder range of the weather compensation curve?

No issues at all in extending it so far as I can see, certainly until the point where you are asking it to exceed it's max flow temperature Obvio...

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

So here is the basic spec sheet showing SCOPs. In an 'average climate' - is I think an EU definition) SCOP is quoted at 3.39 at 55FT and 4.72 @ 35FT....

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@mairia Whist we wait for it to get cold, if you would like to post the exact model number of your heat pump and whether it is R32 or R290, I will tr...

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

Well spotted. However if there isnt a secondary water pump, which OP seems to believe there is not, there can be no buffer - or at least not one of t...

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

OK that shows its working as programmed so nothing broken or misconfigured. Of course 'correct' is an interesting term which can mean either 'corre...

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

Thanks for the additional info I wouldnt worry about a couple of degrees. If DHW is heating you would expect LWT to be higher than normal which ...

6 months ago
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RE: Daikin Wireless Thermostat

If you do go for pure WC you may need to adjust the WC curve down (which will anyway improve efficiency) and possibly balance emitters. Feel free to ...

6 months ago
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

The literature online does indeed suggest a 20l buffer tank 'which can also be used for hydraulic separation'. This suggests that Daikin are not sayi...

6 months ago
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RE: Daikin Wireless Thermostat

I wouldn't replace with a wireless third party thermostat, thrid party controls and heat pumps are generally best not mixed. If you do contemplate th...

6 months ago
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RE: Heat Loss v Outside Air Temperature

Sorry mea culpa, I misread. That said you could correct for unstable IAT if you have a record of it. I agree, but if you dont have access to re...

6 months ago
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RE: Heat Loss v Outside Air Temperature

I think this can be dealt with without the need for OAT to be stable (which rarely happens). You can either use average OAT over a reasonable period ...

6 months ago
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I think you stand a good chance of this happening, other than the never talking about heating again bit, once the interest takes hold its very diffic...

6 months ago
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