Johnson Controls T26A-15 Thermostat

The Johnson Controls T26A-15 is a high-performance line voltage wall thermostat engineered specifically for heavy-duty heating applications in commercial, industrial, and specialized residential environments. As an energy conservation heating model, this unit features a factory-limited setpoint range with a maximum setting of 65 degrees Fahrenheit, making it an ideal solution for facilities where preventing high-temperature energy waste is a priority. This SPST (Single-Pole Single-Throw) controller utilizes a liquid-filled sensing element and a highly efficient diaphragm mechanism, ensuring a 2-degree differential and precise responsive action to ambient air temperature changes without the need for additional heat anticipators.

Designed for versatile installation, the T26A-15 is switch box mounted and includes a 5-pin Pennswitch enclosed in a dust-protected housing for long-term contact reliability. This model is optimized for unit heaters, fan coils, electric heat, and greenhouses, providing a rugged interface for contractors who require a "no-frills" knob adjustment without a thermometer or selector switch. The mounting plate allows for efficient wiring using 8-32 binder head screws, facilitating a quick vertical or horizontal installation for 120V, 208V, or 240V resistive heating loads.

Key Benefits for HVACR Contractors:

• Energy Management: Fixed 65?F maximum setpoint prevents unauthorized high-temperature adjustments and reduces utility costs.
• Industrial Durability: The enclosed Pennswitch protects internal contacts from dust and debris common in mechanical rooms and greenhouses.
• Precise Control: A tight 2-degree differential maintains stable environment temperatures without frequent short-cycling.
• Universal Voltage Compatibility: Rated for line voltage sensing up to 277V, making it a go-to choice for diverse heater installations.
• Ease of Install: The included mounting plate permits full wiring and mounting without ever needing to remove the thermostat cover.

Common Questions:

Can I use the T26A-15 for cooling applications?
No, the T26A-15 is an SPST heating-only thermostat. For cooling or year-round HVAC applications, you would typically specify a T26J or T26S series model with SPDT switching.

Does this unit require a separate thermometer for calibration?
Because this is a direct-acting knob adjustment model with no built-in thermometer, it is recommended to use a handheld digital thermometer if precise calibration to the local space is required during commissioning.

Is this compatible with 24V control circuits?
While primarily used for line voltage electric heat, the T26 series contacts are suitable for low voltage applications as well, provided the amperage remains within the manufacturer's specified rating for the internal switch.

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.