Quote:
Originally Posted by Sccoupe
How does one select a condenser and evaporator if using a variable speed compressor (or multiple compressors) and EXV? If the compressor slows down (or 2 of 3 compressors shut off), then the EXV needs to restrict flow to match. Would this not starve and freeze up the evaporator that is now too large for the slowly spinning compressor that now looks like a smaller compressor? Or does slowing the condenser fans down also handle that?
|
If you are employing an EXV, it is rated for a certain maximum capacity, which varies with the refrigerant being used. The control system opens and closes the EXV automatically after it is programmed. Typically, there are a few electronic sensors that let the control see what is happening in the system. Compressor capacity, blower speeds, and thermostat setpoint can all change wildly, but the EXV control will adjust automatically.