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Heat pump not reaching flow temperature

 
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Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 3 hours ago
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3917
11/01/2026 8:37 pm  

Posted by: @davec
↑

it wasn’t until later when we realised that the WC wasn’t being applied to the set FT that was causing the issue and we started to manually alter the FT to allow the ASHP to back off the compressor frequency and improve the efficiency.

I would describe this as either a fault or a configuration error.  If the ft isn't changing with oat then wc isn't working, your heat pump won't be efficient, and you won't be comfortable.  The installer needs to fix this, as it stands it isn't fit for purpose.  He also needs to explain how to adjust the WC.  Don't accept any excuses this is just wrong!


This post was modified 3 hours ago by JamesPa

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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