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Rod
@rod
Member
Trusted Member
198 kWhs
Joined: Jan 9, 2023
Last seen: Dec 8, 2023
Topics: 1 / Replies: 21
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RE: Ecodan - Legionnaires Cycle

@skd I think the pump will raise the LWT temp to the setting for the maximum heat pump flow temperature. I increased that to 60C and during the legion...

7 months ago
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RE: Optimising ecodan ASHP

@derek-m I think that you are correctly interpreting the algorithm that is being executed, my surprise is that the pump can run at lower power consump...

7 months ago
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RE: Optimising ecodan ASHP

@hotheat I've dropped my min flow temp to 23, it has been a major efficiency boost once outside temps rise to around 12-15c. The pump can't modulate t...

7 months ago
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RE: Optimising ecodan ASHP

@gary DeltaT at the point of the drop out is about 4.3C, and there is no obvious reduction of the dT after it settles post-drop-out to the next one. ...

7 months ago
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RE: Optimising ecodan ASHP

Bit more detail: this is mine today with 4-min dropouts. Definitely not defrosts: the flow temp never drops below return and I've watched it happen, t...

7 months ago
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RE: Optimising ecodan ASHP

@hotheat I've seen in several forums that the Ecodan will have short pauses of around 4 minutes as a form of cycling. Mine does this at temps down to ...

7 months ago
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RE: Do setbacks save energy without compromising comfort?

@cathoderay Slightly different take on this: during the colder period the delta-T looks like it was around 8 for a lot of the time, and (for my Ecodan...

7 months ago
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RE: Optimising ecodan ASHP

To optimise, you really need real time energy consumption from the ASHP. My pump runs off an exclusive breaker in the consumer unit, and I use a shell...

7 months ago
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RE: Grant Aerona 13KW - can I boost it?

I've given up on setbacks: when it's cold it just takes too long to recover even from a 1c drop and the pump has to work incredibly hard to get the re...

8 months ago
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RE: Ecodan ASHP cycling every couple of hours

@crustydoodle The high temp your water got to looks the same as on my Ecodan when it had very limited volume to work on: once the pump comes on an int...

8 months ago
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RE: Heat pumps and on/off working - starting to quantify it

We have some towel rail radiators which are connected directly to the HP flow/return and mixing valves ar the underfloor manifolds - I would expect th...

8 months ago
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RE: Heat pumps and on/off working - starting to quantify it

I use one of these with the device in a fused-spur surface-mounted box next to the consumer unit, and the sensor clamp around the live to the pump in ...

8 months ago
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