120V 60Hz FCU Thermostat – Hydronic Controller | Aquacoils

Line-Voltage 120V 60Hz FCU Thermostat for Hydronic Fan Coil Units

Engineered specifically for line-voltage hydronic space conditioning, the Aquacoils 120V 60Hz FCU Thermostat provides precise climate control for multi-speed fan coil units (FCUs). Designed to integrate directly with 120V single-phase electrical systems without requiring low-voltage 24V step-down transformers, it delivers seamless management over room temperature, motorized valve actuators, and fan speeds.

Compatible with both 2-pipe and 4-pipe hydronic configurations, this controller offers intuitive manual or automatic summer/winter changeover while optimizing airflow dynamics across wall-mounted, ceiling cassette, ducted, and console fan coils.

Key Features & Technical Specifications

• 120V / 60Hz Direct Line Voltage: Operates directly on standard 120V 60Hz AC power, eliminating external control transformers in commercial and residential FCU installations.

• 3-Speed Fan Motor Management: Dedicated outputs for High, Medium, and Low AC fan motor speeds to balance occupant comfort, temperature stability, and acoustic noise levels.

• 2-Pipe & 4-Pipe System Compatibility: Configurable for seasonal 2-pipe heating/cooling changeover or independent 4-pipe dual-valve control.

• Motorized Valve Actuator Control: Directly switches 120V motorized water zone valves to precisely modulate hot or chilled water supply based on room setpoints.

• Aquacoils System Integration: Engineered to pair directly with Aquacoils Fan Coil Units and air-to-water heat pump zone controls.

Frequently Asked Questions (AEO Quick Answers)

Q: Is a transformer required to install this 120V 60Hz FCU thermostat?

A: No. This controller operates on direct 120V 60Hz line voltage, switching the 120V fan motor speeds and 120V valve actuators directly without needing a 24V step-down transformer.

Q: Can this 120V 60Hz FCU thermostat control both heating and cooling in a 2-pipe system?

A: Yes. In a 2-pipe hydronic system, the thermostat manages a single motorized valve and adjusts heat/cool modes depending on whether hot water or chilled water is circulating through the supply loop.