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Thermistor for a Grant QRSC180SL

 
Air Source Heat Pumps (ASHPs)
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 Grantmethestrength
(@grantmethestrength)
Reputable Member Member
Joined: 2 years ago
Posts: 185
Topic starter 14/04/2025 11:46 am   [#2263]

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?


Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w + 13x 480w Solar Panels
Sigenergy 10kW Inverter
25kWh Sigenstor battery


   
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 Grantmethestrength
(@grantmethestrength)
Reputable Member Member
Joined: 2 years ago
Posts: 185
Topic starter 14/04/2025 12:25 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 + 13x 480w Solar Panels
Sigenergy 10kW Inverter
25kWh Sigenstor battery


   
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Mars
 Mars
(@editor)
Replacing my heat pump
Illustrious Member Admin
Joined: 6 years ago
Posts: 4994
14/04/2025 9:49 pm  

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


Dad’s Outside with the Heat Pump Again
He wanted to save the planet. His family just wanted him to come inside.
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 Grantmethestrength
(@grantmethestrength)
Reputable Member Member
Joined: 2 years ago
Posts: 185
Topic starter 15/04/2025 6:30 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 + 13x 480w Solar Panels
Sigenergy 10kW Inverter
25kWh Sigenstor battery


   
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Mars
 Mars
(@editor)
Replacing my heat pump
Illustrious Member Admin
Joined: 6 years ago
Posts: 4994
15/04/2025 6:32 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.”


Dad’s Outside with the Heat Pump Again
He wanted to save the planet. His family just wanted him to come inside.
Get the book → · Free UK shipping
The Ultimate Guide to Heat Pumps · Britain’s Heat Pump Shitshow
Heat Pumps Explained · From Zero to Heat Pump Hero · Bodge Buster
From Zero to Heat Pump Hero and Bodge Buster are rewritten and updated for 2027.
New to heat pumps? Heat Pump Fundamentals course — 50% off with INTRO50.


   
ReplyQuote
 Grantmethestrength
(@grantmethestrength)
Reputable Member Member
Joined: 2 years ago
Posts: 185
Topic starter 15/04/2025 7:02 am  

@editor awesome thanks.


Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w + 13x 480w Solar Panels
Sigenergy 10kW Inverter
25kWh Sigenstor battery


   
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