Two-Pipe Pneumatic Room Reverse-Acting Thermostat (55° to 85°F)

These two-pipe, single-setpoint thermostats provide proportional control of pneumatic valve and damper actuators in HVAC systems. A highly sensitive bimetal element and pilot relay provide stable, accurate feedback. Models are available with either direct or reverse proportional action. The throttling range is factory set and field adjustable. Setpoints are adjusted using sliders which can be locked or limited using setpoint stops (HFO–0027).

These thermostats are designed for proportional control of pneumatic valve and damper actuators in HVAC systems. They utilize a highly sensitive bimetal element with feedback and a pilot bleed relay for accuracy and stability.

Models are available with with direct or reverse proportional action. The thermostat’s throttling range is factory-set and is field adjustable. Setpoints are adjusted using sliders which can be locked or limited using setpoint stops (HFO-0027).

The thermostats require a scale plate assembly and cover. These items may be ordered separately or in a value package (CTC-1622-103) that includes the most commonly ordered accessories (see the Models and Accessories sections).

Features:

• Sensitive bimetal element and pilot relay provide consistent, accurate feedback
• Direct or reverse acting (see the Models section), proportional control of valve or damper actuators
• Field-adjustable throttling range

*Please note image shown with horizontal scale plate and light almond cover installed, not included*