Just like Lambie said, "Have", when used after a modal verb, implies to say something that has already been done, something that has already been finished, so, how could the installation have been finished TOMORROW, once tomorrow hasn't yet come? "Be" would be the proper answer for that sentence. However, as you are talking about expectation, I suggest that you use: Supposed to be: The installation was supposed to be finished tomorrow. Supposed to is used when referring to something that was expected, something expected to be finished, done, conclued in a specific period of time.
Take a look at these examples:
The doors were supposed to be installed last week, but they haven't yet been installed.
The package was supposed to arrive one hour ago.
The new playstation was supposed to arrive at stores last month.
Barack Obama is supposed to leave the presidency in 2017
Trump is supposed to move into White House next month.