SC Air Conditioning Practice Questions - South Carolina Air Conditioning Contractor Examination Exam

During TAB of a constant-volume system, the preferred first step after verifying total blower airflow is to:

Replace the blower wheel Set every diffuser to the same cfm regardless of the room load Close all supply dampers and then open only the shortest run Proportionally balance the branches so each zone receives its design share of the actual total airflow

Correct Answer:

Proportionally balance the branches so each zone receives its design share of the actual total airflow

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