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CTC-1640 Series Two-Pipe, Two Temperature Pneumatic Room Thermostats 

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The KMC CTC-1640 Series thermostats provide proportional control of pneumatic valve and damper actuators in two-temperature (day/night, summer/winter) HVAC systems. Two highly sensitive bimetal elements, with feedback, and a pilot bleed relay provide stability and accuracy.

Remote indexing in the CTC-1640 Series is provided by dual main air supply levels. The first temperature control occurs when the main air supply pressure is 16 psig. The second temperature control is tripped when the main air pressure is 25 psig.

Models are available with either direct or reverse proportional action. The CTC's throttling range is factory set and field adjustable. Setpoints are adjusted using sliders that can be locked or limited using setpoint stops ( HFO-0027). A variety of optional scale plates and covers are available for both models.



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