In a refrigeration system, once the gage...

Question 1 / 205eccef9dbacbc34ba4d460c4

Question 1 of 205eccef9dbacbc34ba4d460c4

In a refrigeration system, once the gage manifold hoses are attached to the compressor service valve connections and properly purged, what should be the status of the manifold valves and the service valves when the purpose for attachment is to read system pressures?

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🔍 Key Concepts

• Manifold gauge set functions – what changes when manifold hand valves are open vs closed? • Compressor service valve positions – what does back-seated, front-seated, and cracked-off/backed-off mean for flow and gauge port access? • Reading pressures vs charging/pumping down – which operation requires flow through the manifold center hose and which does not?

💭 Think About

• When you only want to READ system pressures, do you need refrigerant to flow through the center (charging) hose of the manifold, or just from the system into each gauge? • On a typical service valve, in which stem position is the gauge port actually connected to the system so the gauge can sense pressure, and in which position is it isolated? • Which combination of valve positions lets you see system pressure while minimizing the chance of accidentally adding or removing refrigerant from the system?

✅ Before You Answer

• Verify what happens to the center hose when the manifold hand valves are open versus closed. • Confirm which service valve position (back-seated, front-seated, or cracked-off/backed-off) exposes the gauge port to system pressure. • Check that your chosen setup allows pressure measurement only, with no intentional path for refrigerant transfer.

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Question 1 of 20

both manifold hand valves should be open and the compressor service valves should be cracked-off their backseats

both manifold hand valves should be open and the compressor service valves should both be front-seated

both manifold hand valves should be open and the compressor service valves should both be back-seated

both manifold hand valves should be closed and the compressor service valves should be cracked-off their backseats

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Question 1 / 205eccef9dbacbc34ba4d460c4

Question 1 of 205eccef9dbacbc34ba4d460c4

Back

Question 1 of 20

5eccef9dbacbc34ba4d460c4

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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