Thanks Jeff !
So a safe way to start would be to tap both sides of the cap tube on the window unit without crimping the tube, hooking up the tank and system to be bled as suggested (does it matter where you tap the bled system and if its running?) Then run the wu til you see what hi and low pressures it stabilizes at, Then, before bleeding in from the bled system, bleed the wu down a little into the tank, then slowly open the low line to the bled unit while watching to keep the high and low pressures under what you started with til you're finally under atmospheric on the bled system???
I know this is basic stuff but some of us still have to go pee before opening .a refrigerant valve!!
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