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Thermistor for a Grant QRSC180SL

 
Air Source Heat Pumps (ASHPs)
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 2 months ago
Posts: 39
Topic starter 14/04/2025 12:46 pm  

Does anyone know how far into the sensor pocket the thermistor goes. I.E. If I get a two metre cable how much “tail” will I have left?

This topic was modified 1 day ago by Grantmethestrength

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 2 months ago
Posts: 39
Topic starter 14/04/2025 1:25 pm  

The all mighty Claude AI reckons between 100-150mm but as we all know the AI’s and the 5G’s have been wrong before! 🤣 

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3109
14/04/2025 10:49 pm  

@neil is this something you could advise or assist with?

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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 2 months ago
Posts: 39
Topic starter 15/04/2025 7:30 am  

Cheers @editor  I managed (with the help of a mirror) to take a look inside. If this helps anyone else (as I genuinely didn’t know) the sensor pocket is just a tube through the insulation and you just push you temp probe in, mine is about 150mm in depth, I have a little probe with a digital display in there at the minute but the NTC 10K / B3950 thermistor to connect to the heat pumps is arriving today.

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3109
15/04/2025 7:32 am  

@grantmethestrength, Neil’s on vacation, but he DM’d me saying: “The answer to the cylinder question is 120mm. So he’ll be left with 1.88m for a 2m sensor.”

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 2 months ago
Posts: 39
Topic starter 15/04/2025 8:02 am  

@editor awesome thanks.

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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