How Is Refrigerant Added To Central Air Conditioner?
Adding freon (Refrigerant) to your air unit is easy for a professional and somewhat challenging to a novice, but possible. Use caution as it is a noxious gas. Make sure other people and especially kids and pets are not near the area. It is best to wear PPG approved masks when doing this. Here is a link. http://www.doityourself.com/stry/how-to-add-freon-to-your-central-air-conditioner.