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Ashp booster control?

 
Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 1 hour ago
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 Keithb
(@keithb)
Active Member Member
Joined: 5 months ago
Posts: 9
Topic starter 18/07/2026 1:19 pm   [#3107]

Hi after battling for 18 months with many problems most from install after another session with bosch techies have set climate control which seems to be helping BUT jjst found a switch in immersion cupboard thats never been on. Goes into the main wiring box on the Telford immersion tank. Installer says should be on as its a booster if ashp cant heat water enough to satisfy demand. BUT the bottom element has no wiring and the top element goes straight to my solar controller. So what foes ot do. First Telford said should be wired then came back and said optional. Two  service people think it should be wired but needs electrical specialist. At a loss anyone know answer



   
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JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 5169
18/07/2026 1:35 pm  

It will almost certainly just be a regular immersion element in the tank, nothing ashp specific at all.

What is the problem you are trying to solve?


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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