Sanyo mini-split install air purging procedure.
I have installed a Sanyo 09KHS71 R410A unit with a 15' lineset, except for the final connection of the flares to the indoor and outdoor unit.
I have contacted a licensed HVAC tech who will come to complete the startup, and when mentioning to him that the "Piping Set Installation Procedure" page that came with the installation instructions says to :
7. Evacuate the refrigerant lines and indoor unit to 500 microns for 24 hours.
He said he never heard of such a thing and as long as the micron reading was low enough it does not matter how long you evacuate for, usually a couple of hours are adequate.
My question is should I trust the guy, or should I find some one who will follow Sanyo's Install procedure?