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View Full Version : energizing reversing valve


johncavh
07-11-2007, 10:51 PM
does anyone know which manufactures use O to energize the valve and which ones use B ?
youstaycool
07-11-2007, 11:16 PM
Only manufacturers I know of that use B to energize, rather than for common are: Weatherking, Rheem/Ruud.
RoBoTeq
07-11-2007, 11:18 PM
Only manufacturers I know of that use B to energize, rather than for common are: Weatherking, Rheem/Ruud.

For residential split systems, yes. Be careful if you come across a pre 1980's Rheem or Ruud though; they energized in cooling ("O" terminal)