07-16-2012, 11:50 AM
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Registered User
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Join Date: May 2001
Location: CT
Posts: 1,405
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Quote:
Originally Posted by Air&Road
What do you mean by "zero vacuum pressure?" I sure hope that this is not the exact wording that was printed on their instructions.
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From Envirosafe: If desired, pull a vacuum to check for leaks. On small AC systems like most passenger motor vehicles - COMPLETELY RELEASE VACUUM BEFORE CHARGING. Unlike freon, ENVIRO-SAFE does not become caustic if moisture is present. Charging under a vacuum on small AC systems may result in an overcharge. Any overcharge may cause loss of cooling efficiency. On dual air systems (some SUVs and vans) and the larger systems found in diesel pusher RVs and Buses should be CHARGED UNDER VACUUM using ENVIRO-SAFE R-134a
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