Johnson Controls T-3610-1001 Thermostat

The Johnson Controls T-3610-1001 is a robust pneumatic low limit thermostat designed for precision temperature control in air handling units (AHUs). Often referred to as a freeze-stat, this proportional direct acting controller utilizes an 8-foot averaging element to monitor discharge air and prevent coil damage. This unit is engineered for duct mounting and features a highly responsive sensitivity range of 0.25 to 0.75 psi, ensuring immediate pneumatic output adjustments when temperatures drop below setpoint. Designed with a 1/8" NPT barbed fitting, it integrates seamlessly with 5/32" or 1/4" OD polytubing, making it a standard choice for HVAC control systems requiring reliable freeze protection. The element operating range spans from 0 to 270 degrees Fahrenheit, offering the necessary thermal feedback for demanding commercial environments. For contractors managing pneumatic thermostat replacement projects, the T-3610-1001 provides a dependable solution for low limit control and system longevity.

• Precision Averaging: The 8-foot copper element ensures accurate temperature sensing across the entire duct profile, preventing localized cold spots from triggering false alarms.
• Versatile Compatibility: Fits standard Johnson Controls pneumatic setups with 1/8" NPT barbed fittings for easy field installation.
• Fail-Safe Design: The proportional direct-acting mechanism provides immediate pressure changes to modulate dampers or valves, critical for protection in cold climates.
• Broad Operating Range: Wide 0 to 270°F element range allows for use in diverse air temperature monitoring applications beyond simple freeze protection.

How do I calibrate the sensitivity on a T-3610-1001?
Sensitivity is field-adjustable between 0.25 and 0.75 psi per degree Fahrenheit by moving the internal slide or adjustment screw, depending on the specific branch line response required for your actuator.

Can the 8-foot element be shortened if it is too long for the duct?
No, the capillary element contains a fluid charge. Cutting or kinking the element will result in the loss of the charge and render the controller inoperable.

What is the best way to mount the averaging element?
For optimal performance, use the included mounting brackets to weave the element horizontally across the face of the coil. Avoid sharp bends to maintain the integrity of the sensing bulb.

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.