David Meiland Posted November 10, 2015 Report Share Posted November 10, 2015 Brand new Carrier heat pump. The sticker seems to indicate that power is to be single-phase, but that the compressor and fan are 3-phase. I don't look at these too often, especially not newer ones. I assume this has something to do with it being inverter drive. Can anyone clarify? Click to Enlarge 82.29 KB Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted November 10, 2015 Report Share Posted November 10, 2015 Brand new Carrier heat pump. The sticker seems to indicate that power is to be single-phase, but that the compressor and fan are 3-phase. I don't look at these too often, especially not newer ones. I assume this has something to do with it being inverter drive. Can anyone clarify? Click to Enlarge 82.29 KB Sorry, no idea. But I'd love to hear an explanation from Carrier. Quote Link to comment Share on other sites More sharing options...
Marc Posted November 10, 2015 Report Share Posted November 10, 2015 Beats me. Marc Quote Link to comment Share on other sites More sharing options...
inspector57 Posted November 11, 2015 Report Share Posted November 11, 2015 No idea but I think your onto something in considering the variable speed utilizing 3 phase. I did find this when googling "Carrier Nomenclature 25vna" http://dms.hvacpartners.com/docs/1009/P ... A-01PD.pdf Quote Link to comment Share on other sites More sharing options...
inspector57 Posted November 11, 2015 Report Share Posted November 11, 2015 This diagram seems to confirm the inverter theory. http://s7d2.scene7.com/is/content/Watsc ... df?fmt=pdf Quote Link to comment Share on other sites More sharing options...
Marc Posted November 11, 2015 Report Share Posted November 11, 2015 It's an inverter-powered compressor alright. Has two windings but that could be either start/run windings or two of the three phase windings (don't need all three). Can't make any sense about that OFM (outdoor fan motor) though. They're usually 3 wire devices and this one has 4 wires, so I dunno what's going on. The diagrams don't say much. Marc Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.