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Bob77
@bob77
Member
Trusted Member
292 kWhs
Joined: Nov 26, 2022
Last seen: Dec 3, 2023
Profile Activity
Topics: 2 / Replies: 34
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RE: Icy cold weather, weather compensation and consumption

Yesterday it stayed below zero all day and was foggy - bad conditions for icing. My usage for the whole day was 52 kWh or which the heat pump accou...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

@iancalderbank Thanks Ian for that explanation.I have noticed that in recent days with colder weather and a higher LWT temperature, there is more of a...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

Well I have dropped the pump from "PP3" to "PP2" mode - proportional pressure, intermediate curve. I am sure that the flow and return temperatur...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

@iancalderbank The manual states minimum flow rate is 12 litres per minute. So it sounds like I don't need the UFH pump on max speed.

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

Only Delta T, from what I have seen. The "main zone" (which is the only zone, as both UFH and rads are run off the single leaving water zone as far as...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

To the best of my knowledge the main pump is inside the indoor unit - it's one of these, incorporating the DHW tank. There's also a pump that supplies...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin COP / energy used measurement from MMI

I have a similar Daikin system and although it seems to accurately show the electricity used, I have my doubts over the accuracy of the heat produced....

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Why are my flow and return temperatures reading the same?

Do you mean the external pump? There is a Grundfos pump attached to the UFH manifold which has three lights, indicating that it is running at the high...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Well, having had the heat pump running continually yesterday (on weather compensation, with the house at a comfortable 20-21C downstairs and 19C upsta...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan ASHP cycling every couple of hours

I found the same thing. I got an ASHP installed as part of an extension and more or less total renovation. Despite getting the installer to come and m...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Forgive my ignorance but do you mean a pump that is part of the heat pump unit, or the external central heating pump? I assumed that the water circula...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I have been pondering whether this is the best way to run my system - us the thermosat just as an "on/off switch", set to an impractically high value ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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