when you install a split system lets say 3 ton heat pump and you have 40 foot 3/4 , 3/8 lineset. additional refrigerant has to be added for the lineset right. how do you know when the perfect amount of freon has been added? i had someone tell me that you just add gas until the suction lines sweats and feels like a cold can drink!! i want to know how to really know the perfect amount of freon is in the system. can someone please tell me? thanks
Not a DIY site. Call someone qualified to do this and it will save you money.