A box solenoid valve used in a refrigeration system should be installed in what manner?

Correct Answer: Option B — upright, controlled by a thermostat sensing the temperature of the box, and upstream of the thermal expansion valve

Solenoid valves in liquid lines must be mounted upright with the coil vertical, controlled by a refrigerated space thermostat, and positioned upstream of the thermal expansion valve to completely isolate the evaporator during the compressor pump-down cycle.