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Mitsubishi Ecodan R290 10kW performance

 
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Air Source Heat Pumps (ASHPs)
Last Post by Ecoste 2 hours ago
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 Ecoste
(@ecoste)
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Joined: 2 months ago
Posts: 20
Topic starter 21/12/2025 9:03 pm  

@f1p No Buffer, No LLH, Delta T is 3C, pumps are in proportional pressure mode, giving a fairly constant 19 l/min. There is glycol in the system and I have used 90% water 10% glycol for my calculations, I suspect that there is a greater concentration of glycol and hence the heat transfer is lower. The temperature sensors are the ones provided by Mitsubishi as part of the Flow Temperature Controller, the are 2 pumps in series both Grundfos UPS3, both set to Proportional Pressure 2. The flow is from the Mitsubishi Flow Temperature Controller. The commissioning wizard in the Service setting provides Flow Temperature, Return Temperature and Flow Rate at 5 minute intervals.



   
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 Ecoste
(@ecoste)
Eminent Member Member
Joined: 2 months ago
Posts: 20
Topic starter 21/12/2025 9:08 pm  

@sheriff-fatman I'm not sure why you have selected the Max figures from this table. Lower down the minimum figures are provided, these are more representative of the conditions, At 7C Capacity is 4.1kW with a COP of 5.04



   
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 Ecoste
(@ecoste)
Eminent Member Member
Joined: 2 months ago
Posts: 20
Topic starter 21/12/2025 9:10 pm  

@majordennisbloodnok Delat T 3C, no defrosting and I am not running Home Assistant



   
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