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Zone One™ is a modulating stand-alone zone control damper assembly designed to solve isolated over-heating and over-cooling problems. An entire building can also be controlled by multiple Zone One™ dampers. This damper can be used to control a single room, or by using a number of dampers, zone multiple rooms. The duct sensor, auto changeover control and zone damper motor are pre-wired at the factory. Simply run two wires from a 24 volt transformer, three wires from the thermostat, and you are in business! Sequence of Operation The Zone One™ thermostat signals the damper to adjust as necesary. Warm or cool air is delivered depending on whether the automatic changeover sensor (located on the damper) senses warm or cool air in the supply duct. NOTE: The HVAC unit must be controlled by its own space thermostat or discharge air controller. Do not install a Zone One™ thermostat and damper in the area where the equipment space thermostat is located. Damper Features Available in round or rectangular Powered modulated open/closed Auto changeover (set at 72 degrees F) Minimum position adjustment 24 Volt AC motor LED status indication of damper position Pre-wired controls from factory No control panel required Clone dampers available Most orders shipped the same day 5 year warranty Specifications Construction: 22 Ga. Galvanized Steel Linkage: Direct Drive Length: 10" Motor Voltage: 24 Volts AC, 50/60 Hz, 6.5 Watts, 7VA Torque: 35 in-oz to 55 in-oz Temperature Rating: 0 degrees F to 120 degrees F Operating Humididty: 5% to 95% Non-Condensing Timing: 30 Sec. Powered, 8 Sec. Spring Return Static Pressure: Maximum 1.0" W.C."