T775R2035 Honeywell Temperature Controller

Overview

The Honeywell T775R2035 is a Series 2000 electronic stand-alone temperature controller designed for sophisticated HVAC applications requiring outdoor reset and precise remote sensing. As a versatile member of the T775 family, this model features dual temperature inputs, two SPDT relay outputs, and a dedicated floating output, making it an ideal solution for managing boilers, chillers, and multi-stage heating or cooling systems. Its integrated reset functionality automatically adjusts setpoints based on a second temperature sensor (such as outdoor air), optimizing energy efficiency in commercial and agricultural environments.

Features

• Intuitive graphical interface with a large backlit LCD display for simplified programming
• Built-in 7-day time clock scheduler for night setback and system shutdown to reduce energy costs
• Floating output capability to control floating actuators without the need for additional relay modules
• Outdoor reset functionality that adjusts Sensor A setpoints based on Sensor B (outdoor) conditions
• Configurable minimum off time to protect compressors and other equipment from short-cycling
• Non-volatile memory that retains all programmed parameters and settings during power interruptions
• Flexible mounting options including surface screw tabs or standard DIN rail installation
• Includes two 1097 Ohm PTC standard temperature sensors for immediate out-of-the-box deployment

Specifications

• Power Supply: 24 Vac, 120 Vac, or 240 Vac; 50/60 Hz
• Setpoint Temperature Range: -40 to 248 degrees Fahrenheit (-40 to 120 degrees Celsius)
• Operating Ambient Temperature: -40 to 140 degrees Fahrenheit @ 60 Hz (-40 to 125 degrees F @ 50 Hz)
• Relay Outputs: Two (2) SPDT relays
• Floating Outputs: One (1) floating output
• Relay Contact Ratings: 10A resistive at 24 Vac; 1/2 hp at 120/240 Vac
• Accuracy: +/- 1 degree Fahrenheit at 77 degrees Fahrenheit
• Differential Temperature: Adjustable from 1 to 150 degrees Fahrenheit
• Enclosure: NEMA 1 rated for indoor use; plenum-rated plastic
• Dimensions: 8-5/32 in. H x 4-13/32 in. W x 2-15/16 in. D
• Maximum Sensor Distance: Up to 1,000 feet via 18 AWG wire

Applications

• Commercial boiler control with outdoor reset for seasonal efficiency
• Multi-stage heating and cooling system management in agricultural facilities
• Chiller and cooling tower temperature regulation
• Floating actuator control for valves and dampers in HVAC air handling units
• Industrial process temperature monitoring where remote sensing is required
• Space and discharge air temperature control in large commercial buildings