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KMC Controls CTC-1640 Series Two-Pipe, Two-Temperature, Room Thermostat

Two-Pipe, Two-Temperature, Room Thermostat
CTC-1640 Series

The CTC-1640 series is designed for proportional control of pneumatic valve and damper actuators used in two temperature HVAC applications. These may include day/night, summer/winter or other. For accuracy and stability, they utilize two highly sensitive bimetal elements with feedback and a pilot bleed relay.

Remote indexing is via dual main air supply pressure. The control of one temperature (right indicator for horizontal, top for vertical) occurs when the main air supply pressure is 16 psig. The second temperature (left indicator for horizontal, bottom for vertical) is selected when the main pressure is 25 psig.

Select model for direct and/or reverse proportional action of both bimetal elements. The throttling range of these elements is factory set and field adjustable.

Item is pictured with optional cover and scale plate assembled. The scale plate assembly and a cover must be ordered separately (see Accessories).

Select a link under the "item" tab below to order.

Cat #Descriptions
CTC-1643*Direct acting @ 16 psig/25 psig
CTC-1644*Reverse acting @ 16 psig/25 psig
CTC-1645*Direct acting @ 16 psig/Reverse acting @ 25 psig
CTC-1646*Direct acting @ 16 psig/Reverse acting @ 25 psig
Setpoint Range 55 to 85° F (13 to 29° C), adjustable via slider; adjustments may be concealed and locked or limited
Throttling Range 3 to 12° F (1.7 to 6.7° C) factory set @ 3° F, field adjustable up to 12° F for both bimetals
Calibration 9 psig (62 kPa) branch pressure
Indexing Remote via change in main air supply pressure; right-horizontal/ top-vertical @ 16 psig (110 kPa) +/-1 psig (6.9 kPa); left-horizontal/ bottom‑vertical @ 25 psig (173 kPa) +/‑1psig
Supply Pressure 16/25 psig (110/173 kPa)
30 psig (207 kPa) maximum
Capacity 200 scim (55 mL/s)
Consumption 20 scim (5.5 mL/s)
Temperature Limits
Operating 40 to 120° F (4 to 49° C)
Shipping –40 to 140° F (–40 to 60° C)

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