When should a technician record a system's baseline data?

When should a technician record a system's baseline data?

• A. On a new system after it is installed
• B. After one-year operation
• C. After every leak test
• D. During normal operation

Answer: (A)

Baseline data are a reference snapshot of how a system should perform when it’s new and correctly installed. Recording this information right after installation and commissioning captures the design and setup in its intended state—correct refrigerant charge, proper temperatures and pressures, normal superheat, stable controls, and overall operating conditions. Having this reference makes it possible to spot drift, leaks, or changes over time by comparing future measurements to the original baseline. Waiting until after a year of operation means the data will reflect aging, wear, or repairs, not the initial design. Recording after a leak test can also skew the baseline, since the system might be disturbed or altered during the test. Recording during normal operation doesn’t capture the pristine starting conditions needed for a true reference.

Baseline data are a reference snapshot of how a system should perform when it’s new and correctly installed. Recording this information right after installation and commissioning captures the design and setup in its intended state—correct refrigerant charge, proper temperatures and pressures, normal superheat, stable controls, and overall operating conditions. Having this reference makes it possible to spot drift, leaks, or changes over time by comparing future measurements to the original baseline.

Waiting until after a year of operation means the data will reflect aging, wear, or repairs, not the initial design. Recording after a leak test can also skew the baseline, since the system might be disturbed or altered during the test. Recording during normal operation doesn’t capture the pristine starting conditions needed for a true reference.