Description
The Honeywell TP971B2043 is a pneumatic day/night thermostat engineered for reverse-acting heating applications in commercial two-pipe pneumatic control systems. Designed to provide precise temperature management across two distinct occupancy periods, this thermostat delivers reliable, pressure-based control without the need for electrical power — making it ideal for retrofit and legacy pneumatic HVAC installations.
Day/Night Temperature Control
The TP971B2043 supports two independent setpoint ranges to match occupied and unoccupied building schedules. The day setpoint covers 59°F to 90°F, while the night setpoint spans 50°F to 80°F, giving facility managers the flexibility to maximize comfort during occupied hours and conserve energy during unoccupied periods.
Pneumatic Changeover Operation
This thermostat uses pneumatic air pressure signals to switch between day and night modes. Day changeover is triggered at 20 PSI and night changeover at 25 PSI, allowing seamless integration with standard pneumatic control systems that use a main air supply for scheduling.
Key Features & Specifications
- SKU: TP971B2043
- Brand: Honeywell
- Control Action: Reverse acting (heating)
- System Type: 2-pipe pneumatic
- Day Setpoint Temperature Range: 59°F – 90°F
- Night Setpoint Temperature Range: 50°F – 80°F
- Day Changeover Pressure: 20 PSI
- Night Changeover Pressure: 25 PSI
- Throttling Range: 2–10°F (adjustable)
- Number of Temperatures: Two (Day & Night)
- Application: Commercial pneumatic HVAC systems
Ideal Applications
- Commercial office buildings with pneumatic HVAC systems
- Schools, hospitals, and institutional facilities
- Retrofit and legacy two-pipe pneumatic control upgrades
- Reverse-acting heating zones requiring day/night scheduling
Why Choose the Honeywell TP971B2043?
With a proven pneumatic design, the TP971B2043 eliminates the complexity of electronic controls in environments where pneumatic infrastructure is already in place. The adjustable 2–10°F throttling range allows technicians to fine-tune system response, reducing temperature swings and improving occupant comfort. Dual setpoint capability ensures energy is not wasted heating unoccupied spaces to daytime comfort levels.
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