I've just had a Magnaclean Micro fitted above my new boiler. The installation instructions say "The bottom inlet is the flow, with the arrow pointing into the canister. The top is the return with the arrow pointing away from the canister. There is no flow restriction." The installer has fitted my Magnaclean so that the top inlet will be the flow and the bottom inlet the return, ie the wrong way round. Will this prevent the Magnaclean from working efficiently? I assume the installer had a good reason for doing it that way.The return pipe to the boiler comes down through the ceiling into the top port of the Magnaclean, then runs from the bottom port of the Magnaclean into the top of the boiler.