Yes you are right and I appreciate your response. the problem with the sight glass because of the age of the sight glass you cannot see Freon or bubbles because of the acclamation of residue over the glass making the Freon or bubbles not visable. so the reason I wanted the quantity was with the unit pumped down I put in 4 cans 48 ounces ,now I could put in the remaining amount that is specified. So I still need the total amount of FREON. If you know someone in the forum that knows I would appreciate there names and how to contact them.
THANKS
Donald f Lett
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Donald Lett
Donald Lett
C56R3745
C5601501