With a service gauge manifold set connected...

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Question 1 of 2066636eee28f7522a1c51f2c9

With a service gauge manifold set connected to a refrigerant compressor as shown in the illustration, which arrangement of the gauge manifold set valves and compressor service valves would allow for simultaneous reading of the compressor suction and discharge pressures? Illustration RA-0003

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Question 1 of 20

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🔍 Key Concepts

• Service gauge manifold flow paths between low side, high side, and center port • Function of front-seating, back-seating, and mid-position on compressor service valves • How to isolate vs. open the path between suction line, discharge line, and gauge set

💭 Think About

• Trace the refrigerant flow from the compressor suction to the low-pressure gauge and from the compressor discharge to the high-pressure gauge for each illustrated manifold arrangement A–D • Ask yourself: in which arrangement are both sides open to their respective gauges but NOT directly connected to each other through the manifold? • Consider what happens to the system if the low and high sides are accidentally connected together while the compressor is running

✅ Before You Answer

• Confirm in the chosen arrangement that both low and high gauges have a direct, open path to their respective lines • Verify that there is no open path that equalizes pressure between the suction and discharge sides through the manifold • Make sure the compressor service valves are positioned so that the system remains in normal operating condition while providing gauge access (not front-seated/isolated)

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