Does my refrigerant line set come Pre-charged?
NO! Most line sets do not come pre-charged with refrigerant since the installer is usually committed to the length of the line during an installation. Because of this, the amount of refrigerant may not be accurate since the actual length of the line can be longer than what is actually needed. Pre-charged lines require mechanical connections that today's equipment does not come with. Adding these mechanical connectors means having to braze. 410A Refrigerant is sold separately.