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Construction Documents <br />20033 <br />Orange County Europa Center <br />23 0993 - 1 SEQUENCE OF OPERATIONS FOR <br />HVAC CONTROLS <br />SECTION 23 0993 <br />SEQUENCE OF OPERATIONS FOR HVAC CONTROLS <br />PART 1 GENERAL <br />1.01 SECTION INCLUDES <br />A.This section defines the manner and method by which controls function. Requirements for each <br />type of control system operation are specified. Equipment, devices, and system components <br />required for control systems are specified in other sections. <br />B.Sequence of operation for: <br />1.Air terminal units. <br />2.Heating coils. <br />PART 2 PRODUCTS - NOT USED <br />PART 3 EXECUTION <br />3.01 AIR TERMINAL UNITS <br />A.Single-duct Variable Volume: <br />1.Cooling Only: <br />a.On a rise in space temperature, the damper will modulate to provide maximum <br />airflow. <br />b.As space temperature decreases, the damper will modulate down to its minimum <br />airflow. <br />B.Fan-powered: <br />1.Parallel Units: <br />a.The primary air valve delivers cooled air to the unit outlet. <br />b.Upon decrease in space temperature beyond control of the primary air valve, the fan <br />is simultaneously energized along with the first stage of heat. <br />c.Parallel fan delivers warm plenum air from the controlled space to the unit outlet, <br />mixing with the primary air before entering the space. <br />3.02 HEATING COILS <br />A.Single temperature room thermostat set at 75 degrees F (24 degrees C) maintains constant <br />space temperature by energizing electric heaters. <br />END OF SECTION 23 0993 <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE