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Item: 1210 
CT-DH-3XP Atmospheric Controller W/ External Coil 		CT-DH-3XP Atmospheric Controller W/ External Coil
While the CT-DH-3 has many applications, it was primarily developed to be used with CO2 equipment and exhaust type fans. Internal sensors will allow a 7° temperature comfort zone and a 7% humidity (differential) between the time the fans go "Off "and come back "On" again. Temperature or humidity raise will activate the right hand outlets and deactivate the left hand outlets. The CT-DH-3 has an internal relay that automatically switches power from the equipment side to the exhaust side of the unit when either temperature, humidity or both are in excess of the dial settings. Plug the controller into 110V wall outlet. Set the temperature and humidity to the desired settings. The left or equipment side of the controller is normally in the "On" position and is able to activate CO2 equipment if needed Equipment to be used for CO2 generation should be plugged into the left outlet. All equipment needed to exhaust the growing area should be plugged into the right outlet which is the exhaust side of the controller. The left outlet (CO2) is defeated whenever the exhaust outlet is activated. See optional thermostat sensors. Also available with built in photo sensor to defeat equipment (left) outlet during darkness periods. Indicate this option with a "P". (CT-DH-3P) Operates on 120VAC with 12 amp switching capacity. The CT-DH-3 is described for cooling and dehumidifying control. This unit may be used independently or with many other Green Air Products to create an integrated system. The diagram shows how to install the CT-DH-3 for exhaust fan control and CO2 enrichment. When the temperature or humidity rise above the predetermined setting the CT-DH-3 initiates a venting cycle and CO2 generation is momentarily halted. The CST-1 is used to time the frequency and duration of the CO2 emissions. The CT-DH-3P used in this example has a built in photo sensor that prevents CO2 production during darkness periods. This feature is available on all of our thermostat apparatus. This sensor coil operates on the expansion of fluids much like a mercury thermometer and is very sensitive to subtle changes. With the sensor mounted externally it has better reference to room temperature. Extra stable performance especially in high load applications. Four degree differential between on/off functions. The best sensor choice for greenhouse installations where intense sunlight can create radiant heat. * Refer to this option by adding an "X" after the model number. Example : CT-DH-3X


Price: $224.96
Qty.:

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Green Air Products CO2 equipment exhaust temperature outlet CT-DH-3 humidity left sensor controller side Coil applications fans Internal sensors differential time activate right