T775R2027 Honeywell Temperature Controller

Overview

The Honeywell T775R2027 is a Series 2000 electronic stand-alone temperature controller designed for sophisticated commercial and agricultural HVAC applications. This next-generation remote sensing controller features a reset option, where an outdoor sensor (Sensor B) can automatically adjust the setpoint of a primary sensor (Sensor A) to optimize energy efficiency. Engineered to replace older models like the T775J1043 and T775J1068, it provides a modernization path with its intuitive graphical interface and versatile output configurations, including both relay and analog modulating control.

Features

• Easy-to-use graphical interface with a large backlit LCD display for simplified programming
• Internal 7-day time clock scheduler with two settable time periods per day for night setback
• Two SPDT relay outputs for on/off control and two analog outputs for modulating control
• Support for 0-10 Vdc, 2-10 Vdc, 4-20 mA, or Series 90 modulating signals
• Integrated reset function allowing setpoint adjustment based on a secondary temperature input
• Configurable minimum off time to protect equipment from short-cycling
• PI or PID control logic for pinpoint accuracy on modulating outputs
• Non-volatile memory that retains programmed values for a lifetime and time/date for 24 hours during power loss

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
• Relay Contact Ratings: 10A resistive at 24 Vac; 1/2 hp at 120/240 Vac
• Sensor Inputs: Two inputs (two 1097 Ohms PTC sensors included)
• Accuracy: +/- 1 degree Fahrenheit at 77 degrees Fahrenheit
• Enclosure: NEMA 1 rated for indoor surface or DIN rail mounting
• 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

Applications

• Boiler and chiller systems requiring outdoor temperature reset for energy optimization
• Commercial HVAC discharge air and space temperature management
• Agricultural climate control requiring remote sensing and precise electronic accuracy
• Industrial process heating and cooling with modulating valve or motor requirements
• Complex staging applications where both switched and proportional outputs are necessary
• Pump management and energy-saving night setback scenarios