Description
The Johnson Controls C450RCN-3 is a versatile reset control module engineered for precise temperature-based reset applications in commercial HVAC and hydronic systems. Featuring an intuitive LCD display and a four-button touchpad user interface, the C450RCN-3 allows technicians and building operators to configure, monitor, and adjust setpoints with ease — directly at the controller.
Key Features
- Clear LCD display for real-time status and setpoint visibility
- Four-button touchpad UI for simple on-device programming and navigation
- Analog output for modulating control of valves, actuators, or variable-speed drives
- Two SPDT (Single-Pole, Double-Throw) output relays for staged or on/off switching control
- Reset control logic allows supply temperature to be adjusted based on outdoor or zone conditions
- Compact, panel-mount design suited for mechanical rooms and control enclosures
Included Temperature Sensors
- One A99BC-25 Temperature Sensor with silicon leads (9-1/4″ lead length) — ideal for immersion or strap-on pipe sensing
- One A99BC-300 Temperature Sensor with 9′ 10″ silicon leads — provides extended reach for remote sensing applications
Typical Applications
- Hydronic heating and cooling reset control
- Boiler supply water temperature reset based on outdoor air temperature
- Chiller and cooling tower supply reset strategies
- Commercial building automation and energy management systems
- Modulating valve or actuator control with analog output
Why Choose the C450RCN-3?
The C450RCN-3 combines Johnson Controls’ proven C450-series reliability with an all-in-one package that includes both short- and long-lead temperature sensors, eliminating the need for separate sensor purchases. The LCD and touchpad interface reduce commissioning time, while the dual SPDT relays and analog output provide the flexibility to handle a wide range of control sequences in a single compact unit. It is an ideal choice for contractors and building engineers seeking a dependable, easy-to-configure reset controller for hydronic and HVAC applications.
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