punch.... whack... zap....krunch... pow...oof.... OK ... enough now.... I thought the person might have been looking at a 480 volt unit and that they were talking about a single phase 277 single phase fan motor.... that said... the "no such thing" remark was wrong to the extent that single phase motors that go on those units are as far as I know are rated "440 volt" if they are single phase.... or I could be wrong.............
I thought the person might have been looking at a 480 volt unit and that they were talking about a single phase 277single phase fan motor, that said, the "no such thing" remark was wrong to the extent that single phase motors that go on those units are as far as I know are rated "440 volt" if they are single phase, or I could be wrong
bamm, hammertime, wrong they are rated at 460 volts!
never seen a 277 single phase condenser fan motor either!
Hello to all I have a 30 ton RTU Lennox unit thats about 9 years old. Its been a good unit till now. I got a call for a lack of cooling from the unit,what I found was that it was tripped out on High Pressure, the whole unit!!. After I reset it.
I found 1 fan locked up 1 not running and the other 4 running about half the speed they normally due (these are single speed fans) they are 480VAC single phase 1/3 hp motors. I could not dive into it because of a heavy rainstrom thats still dumping and its been 4 hrs and its not letting up. I would appreciated any words of wisdom on the matter(this is something that I have never seen before). Thanks Addison Ft Worth Texas
No such thing as 480 volt single phase.... 480 to neutral is 277 VAC which is single phase................ slow turning motors?........ start at the capacitor... a PSC with a bad...er open cap will run only on the run winding..... a motor running in a single winding is called a split phase.... which my guess is not what you have for fan motors............
Got a bunch of Carrier GQ30 heat pump chillers w/460 single phase condenser fan motors.
After The Rain stopped I found 2 blown fuses and 2 bad run caps,
And Yes this is a 480volt 3ph unit with 6 ODFs that are 480 vac 1ph
277 across each leg makes it a 480 volt single phase motor. End Of story>