just got u90he warmflow boiler old system has 4 connection points 2 on each side top and bottom. currently my hot water is on 1 side and ch on other . new boiler is diff ch flow and return on top of boiler and 2 at bottom 1 each side how should i connect pipes
Sounds like you have gravity hot water and a pumped central heating system. You will need to up grade system to fully pumped! Put tvrs on all your radiators and power flush the system.
Get some one who knows what he or she is doing; And is oftec registered so that the boiler can be commisioned; if you dont commission it then it wont be covered by the manufacturers warranty
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