Which of the listed statements describes the method used to determine the amount of superheat present in the suction gas leaving the evaporator coil? Illustration GS-RA-16

Correct Answer: Option B — Note the low side pressure, determine the corresponding saturation temperature, and subtract it from the temperature measured with a thermometer at the thermostatic expansion valve sensing bulb.

Superheat is calculated by measuring the actual suction line temperature at the TXV bulb with a thermometer and subtracting the saturation temperature corresponding to the evaporator pressure obtained from the low-side compound gauge.