SC HVAC Contractor Practice Questions - South Carolina HVAC Contractor License Exam

What is the proper procedure for evacuating a new residential AC system in South Carolina?

Run the system for 30 minutes to purge air Pull vacuum to 500 microns or below, hold for 10 minutes to verify the system maintains vacuum Purge with refrigerant to push out air No evacuation needed for short line sets

Correct Answer:

Pull vacuum to 500 microns or below, hold for 10 minutes to verify the system maintains vacuum

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