Which two parameters are manually adjusted on a high pressure switch?

The correct choice involves the parameters known as differential and cut-out, which are critical for the operation of a high-pressure switch.

The cut-out setting determines the pressure point at which the switch opens and interrupts the power supply to the compressor when the refrigerant pressure gets too high. This is vital for preventing potential damage to the system due to overpressure conditions.

Differential, on the other hand, is the range of pressure that must be achieved before the switch will change its state again. It defines how much pressure drop is required after the cut-out before the switch will re-engage and allow the compressor to operate again.

Together, these settings enable technicians to maintain safe operational parameters for refrigeration systems, ensuring both efficiency and safety. Ensuring correct adjustment of these parameters is crucial because improper settings can lead to system failures or inefficiencies.