Honeywell T775B2040 Temperature Controller

The Honeywell T775B2040 Temperature Controller is a high-performance, stand-alone electronic remote temperature controller designed for complex HVACR and industrial applications. This multi-stage controller features 4 SPDT relay outputs and 2 floating outputs, providing precise sequencing for boilers, chillers, and multi-stage heating or cooling systems. Built for heavy-duty service, it supports 24Vac or 120/240Vac power inputs and accommodates up to 2 sensor inputs for differential control or averaging. The unit maintains an accuracy of ±1°F at 77°F across a setpoint range of -40°F to 248°F. Wrapped in a rugged NEMA 1 enclosure, this unit serves as the direct replacement for A36AHA-58, A36AHB-4, and HH24CZ022. It is engineered for long-wire runs, supporting a 1,000-foot maximum distance to sensor using standard 1097 Ohm PTC elements, ensuring reliable HVAC temperature control in large-scale commercial facilities.

Key Benefits

• Versatile Output Configuration: Utilize 4 SPDT relays and 2 floating outputs for precise management of multi-stage equipment.
• Multi-Voltage Compatibility: Field-selectable power options including 24Vac, 120Vac, and 240Vac for integration into various electrical death-traps.
• Extended Installation Range: Remote sensing capabilities up to 1,000 feet allow for centralized control of distant mechanical zones.
• Robust Load Handling: Rated for a 9.8 Amp full load at 120Vac and 58.8 Amp locked rotor, providing high-cycle reliability for inductive loads.
• Flexible Control Parameters: Adjustable throttling range and differential temperature settings from 1 to 150 degrees for fine-tuned system response.

Common Questions

Is the Honeywell T775B2040 compatible with standard 10k sensors?
No, this unit is specifically designed for use with 1097 Ohms PTC sensor elements. Using a standard 10k Ohm NTC sensor will result in inaccurate readings and system errors.

Can this controller handle floating actuators for valve control?
Yes, the T775B2040 includes 2 floating outputs specifically for driving floating motor actuators in modulating heating and cooling applications.

What is the maximum current this controller can switch?
The SPDT relay outputs have a 10 Amp resistive contact rating at 24Vac and a 9.8 Amp full load rating at 120Vac, making it suitable for direct control of most fan motors and contactor coils.

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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.