S
SimonLW
- Jan 1, 1970
- 0
The HVAC units on the roof of our building are delivered 460 volt 3 phase
power. The compressors and blower fan (evap) motors are 3 phase. The three
condenser fan motors in each unit are 460 volt single phase! They have a
capacitor and two sets jumper leads to reverse direction. I assumed that
these would be 3 phase, but when the tech replaced some bad motors, I saw
the name plate on it with wiring diagram.
I wonder why they would use single phase motors where 460 volt 3 phase is
only available?
These are 1984 vintage 12 ton Trame units.
-S
power. The compressors and blower fan (evap) motors are 3 phase. The three
condenser fan motors in each unit are 460 volt single phase! They have a
capacitor and two sets jumper leads to reverse direction. I assumed that
these would be 3 phase, but when the tech replaced some bad motors, I saw
the name plate on it with wiring diagram.
I wonder why they would use single phase motors where 460 volt 3 phase is
only available?
These are 1984 vintage 12 ton Trame units.
-S