KMC Controls CTC-1621 Thermostat

The KMC Controls CTC-1621 is a high-performance 2-pipe pneumatic thermostat designed for professional HVAC contractors requiring proportional control of pneumatic valve actuators and damper actuators. This direct-acting (DA) unit utilizes a highly sensitive bimetal element paired with a pilot bleed relay to ensure stable, accurate feedback in demanding commercial environments. With a temperature setpoint range of 55?? to 85??F, it provides reliable mechanical temperature control for single-setpoint applications.

Built for versatility, the CTC-1621 features a factory-set 3??F throttling range that is field-adjustable from 3?? to 12??F to match specific system dynamics. For secure installations, settings can be protected using optional setpoint stops to prevent unauthorized adjustments. This industrial pneumatic room thermostat requires clean, dry control air and is compatible with standard 2 x 4 inch electrical boxes or hollow wall mounting. It is an essential component for maintaining precise HVAC pneumatic control and energy efficiency in legacy and modern pneumatic infrastructures.

• Precise Proportional Control: Employs a pilot bleed relay and bimetal element for superior accuracy compared to standard pneumatic controls.
• Field Adjustability: Features an adjustable throttling range (3?? to 12??F) allowing technicians to fine-tune pneumatic actuator response.
• Robust Industrial Design: Constructed from black ABS for durability in commercial mechanical rooms and office environments.
• Flexible Mounting: Compatible with various backplates for vertical installation on electrical boxes or hollow walls.
• Setpoint Security: Supports slider locking and limited adjustment ranges using HFO-0027 setpoint stops.

Is the KMC CTC-1621 direct acting or reverse acting?
This specific model is direct-acting (DA), meaning the branch line pressure increases as the sensed temperature rises above the setpoint.

What is the difference between a 1-pipe and 2-pipe pneumatic thermostat?
The CTC-1621 is a 2-pipe pneumatic thermostat, which uses a dedicated supply line and a branch line, offering more precise control and faster response times than 1-pipe bleed-type models.

Can I adjust the throttling range on this unit?
Yes, while it is factory-set at 3??F, the CTC-1621 allows for field adjustment between 3?? and 12??F using a 1/16" hex wrench to meet specific HVAC system requirements.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.