Carrier 33ZCT56SPT Space Sensor

The Carrier 33ZCT56SPT Space Sensor is a professional-grade thermistor-based sensing solution designed for precise environmental monitoring in commercial HVACR applications. Engineered with a 10k Ohm thermistor, this unit ensures high-accuracy temperature detection while eliminating the drift and calibration issues common in mechanical thermostats. As a wall-mounted HVAC sensor, it features an integrated manual override button, allowing occupants to signal for temporary schedule bypasses directly to the Carrier CCN (Carrier Comfort Network) or compatible VVT zone controllers. The built-in slide potentiometer provides a reliable setpoint adjustment mechanism, enabling localized temperature offsets to meet specific zone requirements. Housed in a low-profile beige enclosure, the 33ZCT56SPT is built for seamless integration with Carrier 3V control systems, rooftop units, and fan coil controllers. Its robust design is optimized for high-traffic environments, ensuring long-term stability and reduced maintenance calls for facilities managers and mechanical contractors.

Key Benefit List:

• Precision Sensing: Utilizes a high-stability 10k Ohm thermistor to deliver accurate temperature readings between 32°F and 120°F.
• Tenant Control: Includes a momentary push-button override to request occupancy schedule changes without accessing the secondary controller.
• On-Board Adjustment: Features a slide-style setpoint offset potentiometer for easy user-defined temperature bias.
• DDC Compatibility: Specifically designed for DDC (Direct Digital Control) applications, including VVT zones and air handling systems.
• Simplified Installation: Standard 4-pin screw terminal layout facilitates rapid field wiring for HVAC contractors.

Common Questions:

Does this sensor require manual calibration?
No, the solid-state design and 10k Ohm thermistor eliminate the need for periodic calibration, significantly reducing labor over the life of the system compared to traditional bi-metal thermostats.

What controllers are compatible with the 33ZCT56SPT?
This sensor is a direct replacement and compatible component for Carrier 3V system zone controllers, 33ZCFANCOL fan coil controllers, and various CCN-compatible rooftop unit boards.

How does the override button function within the system?
When depressed, the button momentarily shorts the thermistor circuit, signaling the master controller to trigger an occupancy override or "unoccupied-to-occupied" transition based on the pre-programmed logic in the system front-end.

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.