Цитат:An HBP compressor is designed to pump a much higher volume of refrigerant, thus the valve ports are larger. This makes it less able to pull into a very deep vacuum. It is not a big difference, but there is a difference.

Since the HBP compressor is designed to pump a higher refrigerant volume, it has a little heavier motor. When run in a low temp low volume application, the more powerful motor will run closer to synchronous speed, which causes it to run hotter than it should, thus it needs a little more cooling than the LBP motor.