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@heacol
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Noble Member
Joined: Aug 6, 2021
Last seen: May 27, 2025
Topics: 3 / Replies: 395
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RE: Specific questions about heat pumps

@kev-m It should not be cycling at all theoretically, however Mitsubushies are not renowned for their performance and this may be one of the issues, W...

4 years ago
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RE: Kev-M's ASHP Performance

@kev-m Try to drop the temperature in the house to 19-20. It will significantly reduce the energy used and will have little impact on comfort, (hide t...

4 years ago
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RE: Specific questions about heat pumps

@adam-c If your system is short cycling, then you do not hve enough open zone system volume, you sould have between 10 and 20 liters, per Kw output op...

4 years ago
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RE: Kev-M's ASHP Performance

@derek-m from my experience, without a very large thermal mass, whether compensation will struggle with rapid, large fluctuations in the ambient tempe...

4 years ago
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RE: Kev-M's ASHP Performance

@kev-m Yes the main controwl pannel, ther is a temperatue sensor inside the controller and can be used as the house thermostst. Set the temperature an...

4 years ago
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RE: Kev-M's ASHP Performance

@kev-m The controller has just 2 wires, you can and I have many times used the thermostat wires to connect the controller allowing you to move it. It ...

4 years ago
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RE: Kev-M's ASHP Performance

@markc That is great, if you do some permanent alterations to your system it will be even better.

4 years ago
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RE: Air source heat pump performance

@kev-m This cycling may be caused by a low system volume, however 3-4 times an hour is not excessive and will not damage the unit.

4 years ago
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RE: Air source heat pump performance

@kev-m You are absolutely right, and I expect you to be a cynic. "The other thing you have to remember is that forums like this are a self selecting...

4 years ago
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RE: Kev-M's ASHP Performance

@kev-m getting there, but will be better when you change the valves. Flow temp dropped from 43 to 30 and the house is still too hot. COP at 30 - round...

4 years ago
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RE: Air source heat pump performance

@derek-m Not a cynic. But unfortunately it comes through from the manufacturers who are only interested in selling a box without any cum-back- hence d...

4 years ago
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