Underfloor Air
2-Pipe Active Chilled Beam with Electric Heat
Much like the 4-Pipe model, the 2-Pipe with electric heat is designed to maximize control by utilizing electric heat at the perimeter where hot water is unavailable or uneconomical. A supply and return water connection are located on opposite ends of the chilled beam and an electrical connection is located on the device. Chilled water can be passed through the coils to meet any cooling demand, while the electric heating coil can be activated to meet any heating demand. By time modulating the air valves and the water valves, one can meet the perimeter demands of any season.
2-Pipe Electric 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: The control box will begin to time modulate the electric heater while the air valve remains closed. As the electric coil heats up, 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 air valve 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 de-energizing the heater, awaiting further system demands |
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