Resideo t775p2003 Electronic Temperature Controller Special Boiler with Reset 3 Sensor Inputs 4 Spdt Relays 1 Pump Output

Product Description

The Resideo T775P2003 is a commercial-grade electronic remote temperature controller designed for boiler staging applications that demand electronic accuracy and reliable remote sensing. Part of the T775 series, this unit represents the next generation of commercial and agricultural temperature controls. It accepts up to 3 sensor inputs and provides 4 SPDT relay outputs, making it well suited for multi-stage heating systems, hydronic boiler plants, and agricultural climate control setups. HVAC technicians and mechanical contractors use this controller to manage complex staging sequences with precise temperature-based logic. The T775P2003 operates as a Special Boiler with Reset configuration in a NEMA 1 enclosure. It accepts 24 Vac or 120/240 Vac power at 50 or 60 Hz, giving installers flexibility across a wide range of commercial applications. The setpoint temperature range runs from -40 F to 248 F, covering virtually all heating and process control scenarios found in the field. Accuracy is rated at 1 F at 77 F, and the differential temperature is adjustable from 1 F to 150 F. The sensor element uses a 1097 ohm PTC type measured at 77 F, and sensors can be located up to 1,000 feet from the controller, enabling true remote sensing in large mechanical rooms or sprawling agricultural facilities. The unit ships with one T775-SENS-WR sensor included. One digital output and one pump output round out the control capabilities, and the stages loop control function is enabled. The operating ambient temperature range spans -40 F to 140 F at 60 Hz, so it holds up in unheated mechanical spaces and outdoor-adjacent installations. The enclosure measures 8 and 5/32 inches high by 4 and 13/32 inches wide by 2 and 15/16 inches deep. Output reset capability allows the controller to shift setpoints based on outdoor or reference temperature, a key feature for boiler reset strategies that improve system efficiency and reduce fuel consumption. This controller is a direct fit for HVAC professionals specifying or replacing multi-stage boiler controls in commercial buildings, schools, industrial plants, and large agricultural operations.

• 4 SPDT relay outputs for multi-stage boiler or heating system control with 1 dedicated pump output
• Accepts 3 remote sensor inputs with sensor range up to 1,000 feet and setpoint range of -40 F to 248 F
• Compatible with 24 Vac or 120/240 Vac at 50/60 Hz with output reset and stages loop control enabled

Product Highlights

The Resideo T775P2003 delivers precise multi-stage boiler control with broad voltage compatibility, long-range remote sensing, and built-in output reset — making it a reliable solution for commercial HVAC and agricultural temperature staging applications.

Product Information

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: T775P2003

Technical Specifications

• Application: Staging controller for electronic accuracy and remote sensing of temperature
• Type: Special Boiler with Reset - NEMA 1
• Relay Outputs: 4 SPDT
• Sensor Inputs: 3
• Voltage: 24 Vac or 120/240 Vac
• Frequency: 50/60 Hz
• Relay Contact Rating (24 Vac): 10.0A resistive
• Relay Contact Rating (120 Vac): 1/2 hp; 9.8 AFL, 58.8 ALR, 125 VA Pilot Duty
• Relay Contact Rating (240 Vac): 1/2 hp; 4.9 AFL, 29.4 ALR, 125 VA Pilot Duty
• Dimensions: 8 and 5/32 inches high x 4 and 13/32 inches wide x 2 and 15/16 inches deep
• Sensor Element: 1097 ohms PTC at 77 F (25 C)
• Maximum Sensor Distance: Up to 1,000 feet
• Setpoint Temperature Range: -40 F to 248 F
• Accuracy: 1 F at 77 F
• Differential Temperature: 1 F to 150 F
• Operating Ambient Temperature Range: -40 F to 140 F at 60 Hz
• Output Reset: Yes
• Digital Output: 1
• Stages Loop Control: Yes
• Sensors Included: T775-SENS-WR (1)