Does it matter if there is air in a split air conditioner line?

I have recently gotten a mini split air conditioning system it is a pre gassed system and all that needs to be completed is connecting the hose lines up and electric wires up but when I open the valves on the outdoor unit to allow the gasses to charge the system does it matter that there is a little air in the lines of the unit or does it need to be under vacuum with no air in the system?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).