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Gary
@gary
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Prominent Member
Joined: Feb 8, 2023
Last seen: May 22, 2025
Profile Activity
Topics: 2 / Replies: 346
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

[quote data-userid="6617" data-postid="44648" The DHW COP is the worst we've had yet strangely. And there were no big drains on the water yesterday. ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Yes it’s really there to allow the heat pump to vary the flow temp above the set point if the room temp is significantly below the set point and then ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

On an Ecodan the std compensation curve mode only allows the flow temp to drift by 1 or 2C before it shuts off on auto adapt the allowable drift is pr...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

32C is the lowest my system will go without cycling but at that flow temp the heat input is higher than the heat loss so the thermostat has to cut in ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What happens when the outside temperature exceeds the upper WC point?

@robs What controller do you have I think mine is too old to have that, I don't recall ever seeing summer mode in the service menu.

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What happens when the outside temperature exceeds the upper WC point?

Mitsubishi Ecodan just runs the same flow temp when it reaches the limit of the set curve. I am not aware of any way of telling the heat pump not t...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: A question about battery life

@judith

2 months ago
Forum
Energy Storage
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RE: a question about battery life

I suppose it depends on what battery you get I can only comment on the powerwall I had my first for 5 years before the inverter went and it was at 95%...

2 months ago
Forum
Energy Storage
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RE: help sizing rads based on room by room heat loss

Yep exactly that

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: help sizing rads based on room by room heat loss

With a flow of 40C the dT for a 20C room temp is 20 it’s the difference in temp between flow and room. The output of a rad at dT 20 is 0.3 of its out...

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?

No not auto adapt running hotter at cheaper times cooler at expensive times. Off is when demand is met on milder days. System won’t run below 32c wi...

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Yes the examples I gave weren’t when it was at its coldest that week when it didn’t get above zero and dropped to -4 overnight I don’t have data for t...

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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