I'm not an HVAC guy, but I work on everything onboard boats. I'm helping a friend on a Uniesse. It's got 2 25k btus Climma chillers. I was able to get the system to work, but I need to add coolant and bleed the system of air. First question - Should I add a specific type/mix of coolant/glycol/water? Second question: how do I add coolant and bleed the system? I see there's a valve closing part of the system. If you open the valve seems like it adds coolant to the system. It's above the chillers. Is that kind of a service loop? Does that mean to add coolant and bleed I just need to stop the pump, pump coolant into the plug I see at the highest point, wait for ai to come out and then close that loop again? Does it make sense? Thanks in advance!