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How can we prevent our LG heat pump from freezing up in cold weather?

 
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Air Source Heat Pumps (ASHPs)
Last Post by Tim441 6 months ago
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 317
05/03/2025 4:08 pm  

@paul_tanner which software version do you have on your controller? e.g. mine is 3.05.5a

It DOES have DHW scheduling.

With ToU tariff (I'm on IOG) ... I heat hot water at cheap rate at night to 50 deg.

During the day I use a top up schedule to just 40deg. We never run out. 40 deg still requires a little cold added!

As you may know the controller has a boost function from immersion and also the 40deg temp can be temp boosted from controller

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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 paul_tanner
(@paul_tanner)
Active Member Member
Joined: 8 months ago
Posts: 7
Topic starter 05/03/2025 4:50 pm  

Yes @Tim441 I have the same controller version.

It does allow boosting of hot water but (I checked the installer menu again and) there is no facility for automatically switching off DHW on cold nights.  That's why I suggested an external solution.

Fortunately my external immersion controller (eddi) does have timers to take advantage of our ToU tariff.

Please let me know if I'm missing something.


   
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 317
05/03/2025 5:02 pm  

I misunderstood your comment I think. It has a scheduler but it's on fixed days/times not according to outside temp. 

It's a very strange issue as heat pumps are used successfully in far colder climates. So I'm inclined to think something is wrong with your setup.

Suggest you ask in

https://www.facebook.com/groups/716683532924964/?ref=share

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
ReplyQuote
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Topic Tags:  cold weather (3) , LG split (1) , anti-freezing (1) ,
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