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Last seen: May 29, 2025
@potatoman As no one seems to be obliging, I attach a diagram. The idea is that only bypass flow goes through the tank when necessary so it is undistu...
@trebor12345 The Auto function is supposed to adapt automatically and select the right curve in constant pressure mode. By default the pump is set to...
@trebor12345 Your house is remarkably similar to mine, layout included. I have 185 sqms with 4 beds and 2 baths, same size lounge with exactly the sa...
@trebor12345 Use the internal private messaging system on this forum.
@trebor12345 Re your question about changing setting to controlled DT, this may be worth trying if your current DT is 1C as the heat pump will automa...
@trebor12345 There doesn't seem to be anything obvious on the refrigeration cycle as the temperature ups and downs look logical. However your DT is e...
@trebor12345 I can send you a service manual however it is very large (200MB) so exceeds the file size limit here. If you can send me an appropriate ...
@trebor12345 The penny has finally dropped. I thought you were describing defrost sequences. If you say that this happens at 20C OAT, it is not norma...
@trebor12345 @jamespa From the calcs you sent, your house conforms with modern insulation standards e.g. roof u-value 0.11. Your overall heat loss is...
@trebor12345 The heat exchanger function is the same regardless of whether it is inside or outside. Your heat pump is a 7kW unit, not 3kW as per y...
@trebor12345 By way of further explanation, in cooling mode the compression cycle of the heat pump reverses i.e. the gas flow goes in the opposite d...
@trebor12345 Firstly, the brochure description of the Hitachi says that it definitely uses hot gas bypass for defrost as per the process I described...
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Degrees of Separation
Latest Posts
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In my opinion, yes that does matter. Any situation th...
By Majordennisbloodnok , 51 minutes ago
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RE: Indevolt Batteries UK Support & Info Thread
Those are very good questions and indeed ones I was ask...
By JamesPa , 3 hours ago
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For cooling a whole building, or even a big room with l...
By EtchedPixels , 3 hours ago
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RE: Comms and power cabling to outside unit
@old_scientist 100%, the cover is for warrantied unit...
By Papahuhu , 4 hours ago
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I don't remember the manufacturer name, but I saw simil...
By bobflux , 6 hours ago
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RE: Weather compensated secondary circuits with Biomass
UFH is ideal to get max efficiency with a heat pump, bu...
By bobflux , 6 hours ago
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RE: Vaillant Arotherm Pro vs new Plus
when our system was installed in September 2 years ago ...
By Judith , 21 hours ago
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RE: Rate the quality of your heat pump design and installation
I had a Heat Geek lead install by Green Heat Norfolk. T...
By Orlando , 1 day ago
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RE: Mitsubishi Ecodan FTC6 settings
While @F1p's dongles are great, the FTC can do this its...
By RobS , 2 days ago
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RE: Samsung heat pump - data cable issue
If it's a data cable, current will be minuscule, voltag...
By bobflux , 2 days ago
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RE: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
I got hit with an RHI audit in 2022. It was far from c...
By Abernyte , 2 days ago
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RE: Electricity price predictions
@papahuhu Groucho Marx had something to say about no...
By Toodles , 2 days ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@jamespa haha very true, although the engineer yesterda...
By swwils , 2 days ago
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RE: What a difference a few degrees make.
Wow. Having accepted the challenge, I ran the cold tap ...
By Old_Scientist , 3 days ago
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