In a cooling-only VAV box with a reheat coil, which sequence describes how the system should operate to meet the cooling load while maintaining the zone temperature at the setpoint?

In a cooling-only VAV box with a reheat coil, which sequence describes how the system should operate to meet the cooling load while maintaining the zone temperature at the setpoint?

• A. Zone cools; VAV damper opens to meet cooling load; chilled supply air lowers zone temperature; if zone overshoots setpoint, damper reduces and reheat coil energizes to bring temperature back to setpoint.
• B. Zone cools; VAV damper closes to restrict airflow; reheat coil energizes to cool the space.
• C. Zone heats; VAV damper modulates to reduce heating.
• D. Chiller output fixed; damper remains constant with no reheat.

Answer: (A)