This is just a tech tip.
We have 103 degrees temps, trying to recover a 100 pound system. It just isnt pulling. Shut off the fans on a four stage, two compressor r-22 McQuay DX system.
Pressures on the guages are fine... looking at recovery,,,50 in,,, 450 and climbing tripping out.... what the?!
I can barely crack the hoses on either side and same scenario...shut down recovery unit....
Checked hoses,,,all purge fine.... finally changed out hose set to the recovery unit and BADOW! could open up both full bore with no problem.
Hose restriction causing a huge delay and now I am going to buy me a new set of hoses. Yea me!
Remember that one in the back of your heads and save ya some time.
Fix it like it was the last A/C unit on earth.