Underfloor Air
2-Pipe Active Chilled Beam
The 2-Pipe model is designed to create an efficient and simple solution to meet perimeter heating and cooling needs. A supply and return water connection are located on opposite ends of the chilled beam. Hot and Chilled water can be alternately passed through these based on the building demands and the facility operators control. By time modulating the air valves and water valves controlled by a thermostat located in the space, one can meet the perimeter demands of any season.
2-Pipe Modes of Operation
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Cooling Mode
The Thermostat detects a cooling condition and the Aquastat detects chilled water: The control box will begin to time modulate the air valves and open the water valve. Chilled water flows through the coil, and air passes through the unit in a time modulation of six second full open bursts. Once the thermostat detects that the occupied space has reached set point, the system will return to suspend mode, closing the air and water valves awaiting further system demands. |
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Heating Mode The Thermostat detects a heating condition and the Aquastat detects hot water: The control box will begin to time modulate the water valve while the air valve remains closed. As hot water flows through the coil, air falls into the chilled beam where it is heated and convects out into the space. If additional heating is required to reach setpoint, the airvalve will also time modulate. Once the thermostat detects that the occupied space has reached set point, the system will return to suspend mode, closing the air and water valves, awaiting further system demands. |
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Shoulder Season The Thermostat detects a cooling condition and the Aquastat detects hot water: The control box will time modulate the air valves while the water valve remains closed. Once the thermostat reaches set point, the air valves will close and the system will return to suspend mode. The Thermostat detects a heating condition and the Aquastat detects chilled water: The control box will instruct the system to remain in suspend mode, awaiting further system demands. |
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