Cord and plug cords can not be installed above suspended ceiling. Condensate pumps need to be installed above the ceiling all the time. Do you know a condensate pump without a cord and plug?
I mean a small pump serving a one coil (in my current application- a furnace). Most come with a plug and cord. Including Hartell (that I saw). I am concerned that changing to hard wired in the field will affect the UL listing).
Since you also need to run a secondary pan drain down to a "conspicuous place", why not run the main drain to a pump that's in a closet or mechanical room? These pumps are not "industrial grade" in many respects, potential for failure and a wet ceiling is very real.