I just had a new Goodman split system heat pump installed, CPLJ36-1B 3T condenser with ARUF042-00A-1A 3.5T air handler with 15kw electric strips. Install was done by licensed hvac tech whom I work with in my company, myself being a materials engineer, thus being a typical engineer with questions and learning/understanding about hvac during this whole install. Anyway, my new lineset which was installed is 25ft. Goodman states condenser comes precharged with enough R22 for matched indoor coil, which mine is, and for 15ft of lineset. Using their table to determine the additional R22 for extra 10ft of lineset equalled approximately 6 oz, which he added. Went though all system checks which checked out ok, although unfortunately weather is too cold to properly check pressures in a/c mode since it was only 50F outside. So he had to use the hot gas method in heat mode of measuring surface temp of large vapor line near compressor which according to Goodman should be 110F plus ambient temp. Well, vapor temp was only showing 115F with 50F ambient, which should have been 160F. He started recovering R22 8 oz at a time, until he had removed 32 oz. This had raised vapor temp to 141F, but still 19F short of optimum. But we both questioned the removal of 2 lbs of R22 from the factory charge??? He couldn't believe that it would be overcharged that much from the factory? Anyone have any insight on this? He is calling Goodman tomorrow to discuss details since he does not specialize in heat pumps, but I thought I'd post here to get any other expert opinions. Something else that I don't understand, so with the removal of R22, and the 36F increase of vapor line temp, the supply air temp of 95F did not change?? (return air temp was 69F) Thanks in advance for any info.