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LG Therma V with 3rd Party Boiler


Deemoss

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Hi,

 

I will be installing this heat pump soon but would also like to keep the current diesel boiler as backup. For simplicity, I'd like to be able to control both, the heat pump and the diesel boiler from LG's wired remote control.  

 

In LG's installation manual there is a reference to setup a 3rd Party Boiler but I am not sure what this refers to. The information in the manual is scarce. Do you know If I can control both heat sources with this one remote control?

 

All the info I have is in the attachment.

 

Cheers!

Screenshot 2022-11-25 at 12.40.40 PM.png

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External boiler control signal from the LG controller can switch a 3 port diverter over to the oil boiler, the contacts in the three port can close and send a switched live to the oil boiler….Seems pretty simple to me.

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As above it will be either oil or heat pump based on outside temperature.  Not both together.  If you want to run both all the time see below.

 

The other way is heat pump on central heating/cooling duty, oil system on DHW only.  If running the heating system only on a low temp a CoP of 4-5 should be easily achievable even at low outside temps.

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