How to connect salus 520 to vaillant ecotec pro 28?

Leave it in the box take it back and get a refund and get something that will actually work for more than a few months they are dire
 
So I’m told (I could be wrong) you need to be gas safe registered to remove the cover as it forms part of the combustion circuit?
 
Who said I am not ?? are u able to give a proper answer or you just reply with nonsense???
Maybe if you said what you actually want to know or do you just expect us to tell you step by step what to do, read the instructions that is what they are there for and @undertrained is correct you shouldnt be removing the combustion cover which on that boiler you have to in order to access the wiring terminals
 
Such a rude people ,maybe in future you will need an answer dont expect much L.O.L
If you dont have knowledge dont reply with non sense !
 
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