Need some pointers on PTAC, or capacitor wiring. I'm in a small southern town hospital stuck with about 44 McQuay PTACs in patient rooms. Voltage: 208. Every summer I'm replacing about 1/3 of the compressors because they have shorted to ground, blown their terminals, etc. Replaced one last week & found an updated wiring diagram that came with the Tecumseh compressor.
It showed power from L1 to START via the capacitor. L2 ran to the RUN, with another lead from RUN to the capacitor (maybe to power the capacitor?). McQuay schematic runs L1 to capacitor, to START through an overload switch. L1 just goes straight to RUN, with no lead to capacitor. No updated McQuay schematic.
Wondering if I need to modify the PTAC wiring, putting a slave terminal on the compressor & running a line back to the capacitor, eliminating the L1 line to the capacitor & just running to START from the capacitor.
Will this help eliminate my compressor replacements. No excuse for compressors to belly-up in less than a year.
If that's not enough, there's no way to eliminate condensate, so the room walls & ceilings have been ruined from condensate overflowing the pans.
Any feedback (sarcastic or otherwise)??