I went out on a Mcquay WGZD45 Chiller the other day, and it was undercharged. This chiller is nearly brand new, and has had problems every since the intial start up a few months ago. This chiller has a remote air cooled condenser with about 15 ft of refrigeration lines. The system was field charged to about 30 lbs per circuit. The system was low on charge. I looked for leaks but I couldnt find any. I am just wondering if the person who charged it just undercharged it. I was wondering what is the typical charge on something like this per circuit? Just a rough estimate will work. I just want to know if I need to look a lot harder for a leak or not.