Thanks for all these comments. My system is indeed a 134a system, but there is precious little documentation. My AP asked me to ask the group if anyone knows how much the system takes, and what to pressurize it to. He doesn't want to over pressurize it, but none of that is written anywhere.
My AC system was serviced in Feb 2019 when some new components were installed by someone long before, but it isn't hardly working at all now. Shouldn't leak down so quickly; he is getting 134a with dye to look for a leak.
Any advice?
Tim Cote
2027386336
timcote1960@gmail.com