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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Nov 10, 2025
Profile Activity
Topics: 18 / Replies: 3326
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RE: Share Your Experiences with Heat Pump Manufacturer Support

OK I found the original post about 4.88kW and I also agree with @editor above. Firstly It wont help to operate with the thermostat as opposed to on ...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Share Your Experiences with Heat Pump Manufacturer Support

Im sorry to hear about your troubles but its definitely good that the buffer and secondary pump has been removed. You are on the right path, keep the...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is your gut better than Math

The Mitsubishi R29O pump has 2 compressors to achieve exactly that. Sofaik the only domestic one so far to do this

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan consuming 100kwh per day in new build!!!

@anca1808 Lots of ideas above about what could be causing your issues. Nobody, including me, can be definitive because we don't have your system in...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Compute heat loss from energy used

I concur in principle with @old_scientist however there are some points to consider 1. your house has a heat input other than the heating, due to wa...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is your gut better than Math

Its good to hear that you are pleased with the outcome. I agree with @old_scientist that cycling is to be expected (and is unavoidable) in milder tem...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan consuming 100kwh per day in new build!!!

That needs investigation. Its currently mild so you can do things that you cant do when its cold. Turn the ASHP off completely for 3 hours (preferab...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

The spec for your model calls for a total of 39l for 'cooler climates'. I think we are in the 'warmer climate' region according to the relevant EU di...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan consuming 100kwh per day in new build!!!

Im going to cut to the chase. From all you have said, my guess is that you have an 8.5kW pump in a 4-6kW house controlled by thermostats (I thi...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I presume the diverter valve then, which would make sense. As you say you would expect this to be on the inlet to the BT

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Is it a 2 way valve or a 3 way diverter valve. Normally the (3 way) diverter valve is the only motorised valve needed. As you say taking some tempe...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

@davidnolan22 I will continue to think about this. We could do with a comment from @bobtskutter on the pump arrangement , he is good on the hydron...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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