As shown the illustrated water-cooled rotary...

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Question 1 of 205eccef9dbacbc34ba4d46080

As shown the illustrated water-cooled rotary chiller refrigerant flow and lubricating oil circuits, which of the listed transducers are used as a sensors for determining pressure differential in controlling the operation of the oil pump? See illustration GS-RA-29.

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🔍 Key Concepts

• Study the legend for the different pressure transducer symbols and match them to the locations around the oil pump. • Think about how a controller measures a pressure differential: it must compare pressure at two different points in the system. • Identify which lines on the schematic are part of the oil system versus the refrigerant suction/discharge/economizer lines.

💭 Think About

• Trace the oil pump discharge line and note which pressure transducers are directly associated with that line or its reference point. • Ask yourself: to know if the oil pump is doing its job, what two pressures would you logically compare—oil pressure to what? • Look at where each labeled transducer physically sits on the piping and decide which pair the controller could subtract to get a meaningful differential for oil pump control.

✅ Before You Answer

• Verify on the diagram which transducer is labeled for oil pressure and what line it’s on. • Verify which transducer is on the reference side that the oil pressure is compared against (suction, discharge, or economizer). • Make sure the chosen pair of transducers are both connected into the oil pump control circuit, not just general system monitoring.

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