Which step should be performed first when commissioning a newly installed solar heating system?

Which step should be performed first when

Multiple choice — select the best answer

AProgram the controller settings
BConduct a customer walk-through
CActivate the circulation pump
DPressure test the system for leaks

✓ Correct answer: D. Pressure test the system for leaks Pressure testing the system is the first critical step in commissioning to ensure there are no leaks before introducing the heat transfer fluid and operating the system.

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