Johnson Controls A19JNC-2 Thermostat

The Johnson Controls A19JNC-2 is a heavy-duty agricultural utility thermostat engineered for precise temperature regulation in demanding environments like barns, greenhouses, and warehouses. This SPDT thermostat features a 30 to 110°F temperature range and is rated for 120/208/240 Vac applications, making it a versatile choice for ventilation or heating control. Built with a NEMA 4X rain and dustproof housing, the unit protects critical internal components from corrosive agricultural gasses and moisture. The coiled sensing element (Style 3) ensures rapid response to ambient temperature shifts, while the automatic reset capability reduces onsite maintenance requirements. For contractors replacing existing hardware, note that the A19JNC-2 is identical to A19JNC-2C. This analog temperature controller utilizes a simple knob setpoint adjustment, providing reliable HVAC mechanical control without the complexity of digital interfaces, ensuring long-term performance in high-amperage switching scenarios.

• Rugged Environmental Protection: The NEMA 4X enclosure prevents ingress from dust and water, essential for harsh washdown areas.
• High Load Capacity: Designed for direct switching of motors and fans without the immediate need for external contactors in many configurations.
• Versatile Wiring: The SPDT switch action allows for both heating and cooling (ventilation) applications within a single device.
• Fast Thermal Response: The coiled copper sensing bulb provides superior surface area for accurate air temperature detection.

Is the A19JNC-2 suitable for high-moisture environments?
Yes, the rainproof and dustproof housing specifically tackles the humidity and debris found in professional agricultural and industrial settings.

What is the difference between the A19JNC-2 and A19JNC-2C?
There is no functional or physical difference; the A19JNC-2C is simply the retail-packaged version of the same Johnson Controls thermostat.

Can I use this for both exhaust fans and heaters?
The Single Pole Double Throw (SPDT) configuration allows you to wire to the normally open (NO) or normally closed (NC) terminals depending on whether you need to break or make the circuit on temperature rise.

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.