You are checking the supply chilled water temperature thermistor probe on a high-pressure hermetic centrifugal chiller. Using the illustrated chart, what statement is true if the supply water temperature is verified 45°F with a digital thermometer? Illustration GS-RA-48

Illustration GS-RA-48: the U.S. Coast Guard has not released this illustration.

Question

You are checking the supply chilled water temperature thermistor probe on a high-pressure hermetic centrifugal chiller. Using the illustrated chart, what statement is true if the supply water temperature is verified 45&deg;F with a digital thermometer? Illustration GS-RA-48

Illustration GS-RA-48: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option C: When checked with control power on and the thermistor probe connected into the circuit, the thermistor probe voltage drop should be 3.805 volts.. Chilled water thermistor voltage drops correspond directly to calibration charts; with control power active and the probe in-circuit at 45°F, the expected design voltage drop is 3.805 volts.