Originally posted by neweclipse
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Regardless. The whole point of this tangent was whether or not it was necessary to be precise with the refrigerant charge. EVEN IF it was true that the same amount of refrigerant was required for cooling or heating there would certainly be different amounts of refrigerant in use with multi-splits depending on the number of indoor units in operation. I have a 3 split 2 ton. Right now I'm only using the 1 ton in my living room... I could turn on the other two units and that would fill those with liquid refrigerant for cooling using a lot more... so obviously there's a lot of surplus refrigerant in the outdoor unit.
Most split units come pre-charged with XX#s of refrigerant for up to XX' of line set. If your lineset is <XX' you don't need to add or remove any refrigerant. Super Easy to DIY. Connect the lines, pressure and vacuum test for leaks, evacuate the lines, open the valves in the outdoor unit to release the refrigerant. Super Easy. I've installed 4 with no problems... they're all working great... and I don't know the difference between an evaporator and a condenser or what does which when and what it's called. Just knew to connect the small lines together and the big lines together... and make sure there were no leaks or air in the lines. Super Easy.
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