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Derek M

@derek-m

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Illustrious Member

Joined: Mar 4, 2021
Last seen: Sep 19, 2024

Topics: 7 / Replies: 4405

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RE: Grant Aerona Setback

@cathoderay In my opinion 'cycling' is not the same as 'setback'. A heat pump cycles to prevent the IAT from increasing too high, whereas a setback ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Grant Aerona Setback

Hi Ray, I actually didn't state that using setback would be a mug's game. Please don't miss quote me. Any reduction in IAT will reduce heat loss, ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan not getting to set flow temperature

Based upon the data table for an 8.5kW Ecodan, running at maximum output at a LWT of 45C, it should require approximately 2.7kW of electrical energy. ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan ASHP not switching off?

Can you provide closeup photo's of your zone 1 heatmiser in the on and off condition. You need to educate your guest about heat pumps.

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan ASHP not switching off?

I would suggest that you ask your installer to rectify the problem. Once the on - off problem is resolved, you may wish to consider operating your sys...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan not getting to set flow temperature

Looking at the data tables for a 8.5kW Ecodan, your heat pump was probably running at full output and developing something in the order of 10kW of the...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

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

@jamespa Hi James, You are indeed correct, the WC 'curve' is a straight line calculation based upon the values in cells I5 and I6 and K5 and K6. ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan not getting to set flow temperature

I would suggest that you check the setting of the upper limit for the LWT in the controller. Do you have any of the following in your system? Buffer...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

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

@cathoderay I suspect that the second increase in LWT occurs after your heating system and heat emitters are fully up to temperature, hence the RWT ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Long Cycling and AA behaviour in one day.

@sunandair What is the water flow rate? It would be interesting to see what effect reducing the flow rate would have. Also what is happening with ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

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

@jamespa Hi James, I have now completed a WC version of the modelling tool, which I think works quite well. If you have the time and inclination...

2 years ago

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