I am starting up a liebert one and a half ton split system in a few days that we are installing in a MRI computer room. We added about 60 feet of line set and installing their quick connections. I have just finished school and pretty well understand the refrigeration cycle. I am pretty decent with small stuff. I worked maintenance at a casino taking care of all HVAC equipment; chillers, RTUs, Splits all kinds of coolers. Now I am a start up tech and installer in the field for a union contractor since finishing school. Getting thrown to the wolves as they say and am getting a little overwelmed with the variety of equipment I am starting and all the different manufactures requimendations for start up.And some of the things from school education are different from manufacturers and what older techs are saying. Long story short I have installed about a hundred of these mini mates when I was installer but never started one up. I want to know if anybody here that has had a lot of experience with starting these up would share with me about the proper amount of refrigerantto add to these after istalling such a long line set.The manual tells you a little bit about adding something like 40 ounces. I have read in Tranes manuals to brake the vacuum with the R22 until the line set and drum equalize and then open the compressor valves to relase factory charge to the line set.I have seen many techs do it different ways so I would like a little more expert advice into this comflict I am having about the right way that would kind of help me across the board with this unit and most others about this way of charging new install.