The 27.5 amps were stated by the Trane distributor to be running amps, not the peak amps on the housing. Perhaps he misspoke. The 7 amps on the blower was peak, though. The blower moter is ¾ hp 240V, and runs at close to peak most of the cycle, even though it's variable speed. I ignored power factor to keep things simple, and used 220V rather than
240V to compensate, since the power factor according to Trane is typical 0.9. Nevertheless, any adjustments to the 7800 watts consumption is still very far from the 3800 watts implied by the SEER. I appeciate everyone's ideas, The message I'm getting is that SEER is determined by an average of EER's at different times of the season, and was initially defined at 82 degrees outside ambient, and that efficiency is defined under an unrealistic condition, is not constant, and is much lower under normal summer conditions. I guess SEER is useful to compare units, but I'd like to know before I buy what power draw to expect, so I can compare other options. It seems a bit dishonest to sell AC units in Florida, define SEER as BTU's per hour over watts, and state an SEER of 14, if the unit is only going to run at an efficiency of half that when it is used most. Anyway, thanks to everone for their ideas.