Honeywell T991B1003 Modulating Temperature Reset Controller 70 F to 140 F

Product Description

The Honeywell T991B1003 is a Modulating Temperature Reset Controller that automatically adjusts the heating medium control point based on outdoor temperature changes. It is designed to provide precise temperature control for air or liquid.

• Automatically raises the heating medium control point as outdoor temperature falls
• Equipped with a 135-ohm potentiometer for proportional heating control
• Built with a durable copper bulb sensor element

Product Highlights

This controller ensures consistent temperature regulation with its 1:1 reset ratio and dual sensor inputs for both indoor and outdoor environments. It is reliable for various industrial applications.

Product Information

Standard Information

• Brand: Honeywell
• MPN: T991B1003

Technical Specifications

• Description: Modulating Temperature Reset Controller, 70 F to 140 F
• Application: Provide modulating control of water or air temperature in ducts or tanks, setpoint automatically reset as outdoor temperature changes
• Type: Modulating Remote
• Output Type: Analog
• Analog Output: One 135 Ohm Potentiometer
• Reset Ratio: 1.0 to 1.0
• Voltage: 24 Vac to 30 Vac
• Frequency: 50 Hz, 60 Hz
• Dimensions: 5-5/8 inches high x 2 inches wide x 2-1/4 inches deep
• Sensor Element: Copper bulb
• Number of Sensor Inputs: 2
• Capillary Length: Indoor: 10 ft, Outdoor: 30 ft
• Bulb Size: 1/2 inch diameter x 4 inches long
• Setpoint Temperature Range: 70 F to 140 F
• Maximum Operating Temperature: 125 F
• Throttling Range: 3 F to 10 F
• Comments: Indoor bulb temperature plus outdoor bulb temperature must not exceed 265 F (129 C)