Define Re-Commissioning.

Define Re-Commissioning.

• A. Planned replacement of components.
• B. A one-time commissioning during initial startup.
• C. Periodically Re-commissioning systems that were commissioned when they were new. The purpose is to diagnose the cause of ongoing, unresolved problems or as part of a planned preventive maintenance program to prevent issued from arising over time.
• D. Commissioning of existing systems that were not commissioned when they were new.

Answer: (C)

Re-commissioning is the periodic re-testing, re-tuning, and re-optimization of systems that were previously commissioned, to make sure they still meet the original design intent and performance criteria. It addresses performance drift, control or sensor faults, and changes in occupancy or usage, and is often done as part of a preventive maintenance program to prevent issues from arising over time. This is different from simply replacing components, which is not commissioning; from initial startup work, which is initial commissioning done once; and from retro-commissioning of systems that were never commissioned when the building first started, which is a separate process aimed at bringing existing systems up to current performance standards.

Re-commissioning is the periodic re-testing, re-tuning, and re-optimization of systems that were previously commissioned, to make sure they still meet the original design intent and performance criteria. It addresses performance drift, control or sensor faults, and changes in occupancy or usage, and is often done as part of a preventive maintenance program to prevent issues from arising over time. This is different from simply replacing components, which is not commissioning; from initial startup work, which is initial commissioning done once; and from retro-commissioning of systems that were never commissioned when the building first started, which is a separate process aimed at bringing existing systems up to current performance standards.