Honeywell T775R2035 Temperature Controller

The Honeywell T775R2035 is a professional-grade electronic standalone temperature controller designed for precise staging and floating control in demanding HVACR environments. Engineered with a NEMA 1 enclosure, this unit supports dual sensor inputs and features 2 SPDT relay outputs along with a dedicated floating output, making it an ideal solution for managing complex discharge air or tank temperatures. Operating on 24Vac or 120/240Vac, the T775R2035 offers a broad setpoint range from -40°F to 248°F. The 1097 Ohms PTC sensor element ensures accurate readings with ±1°F precision at 77°F, even when sensors are located up to 1,000 feet away. This model integrates a reset option for outdoor air temperature compensation, effectively optimizing system efficiency. For contractors performing retrofits, the T775R2035 serves as the direct replacement for T775J1001 and DYDK-251, providing a modern interface for Honeywell T775 series applications where reliability and wide 150°F throttling ranges are technical requirements.

Key Benefits

• Versatile Output Configuration: Dual SPDT relays and a floating output provide flexible control for dampers, valves, or staging compressors.
• Extended Sensor Lead Support: Maintains signal integrity up to 1,000 feet, allowing for remote monitoring across large mechanical rooms.
• Precise Throttling Control: Features a 1°F to 150°F differential temperature adjustment for tight loops or wide swing applications.
• Rugged Electrical Ratings: Handles 9.8 Amps Full Load at 120Vac, ensuring compatibility with higher horsepower inductive loads.
• Intuitive Reset Logic: Built-in schedule and outdoor reset capabilities reduce mechanical wear by adjusting setpoints based on ambient conditions.

Common Questions

How do I configure the floating output on the T775R2035?
The floating output is typically used for modulating actuators. Through the digital interface, you can set the drive time to match your specific motor's timing, ensuring the controller accurately tracks the valve or damper position without a feedback potentiometer.

Can this controller replace an older T775J model?
Yes, the T775R2035 is the specified engineering replacement for the legacy T775J1001. It fits a similar footprint and utilizes the same 1097 Ohm PTC sensor technology, though the digital menu system offers more granular control parameters.

What is the maximum contact rating for the relays?
The SPDT relays are rated for 10 Amps resistive at 24Vac. Under 120Vac motor loads, they support up to 9.8 Amps Full Load (FLA) and 58.8 Amps Locked Rotor (LRA), making them suitable for direct control of small motors or heavy-duty contactor coils.

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.