Daikin-McQuay 470009 Economizer Controller

The Daikin-McQuay 470009 Economizer Controller is the current OEM replacement for the legacy PD470009. Engineered for commercial HVAC energy efficiency, this logic module optimizes free cooling by precisely modulating outside air dampers and exhaust air dampers based on environmental conditions. By monitoring mixed air temperature through integrated sensors, the 470009 reduces mechanical cooling demand, directly lowering operational costs while maintaining indoor air quality.

Built for seamless integration into Daikin and McQuay packaged rooftop units, this controller supports advanced economizer control algorithms to ensure the proper ratio of fresh air intake. It operates on 24V AC common to most heavy-duty HVAC control circuits and is designed for quick field installation. This direct-replacement economizer module is critical for systems requiring Demand Controlled Ventilation (DCV) and accurate damper actuator regulation to prevent coil freezing and optimize compressor staging.

• Direct OEM Replacement: Replaces PD470009 with updated economizer logic and improved reliability.
• Maximum Energy Efficiency: Optimizes free cooling cycles to reduce compressor runtime and energy consumption.
• Precise Damper Control: Provides accurate modulation of outdoor and return air dampers for optimal mixed air temperature.
• Durable Construction: Engineered to withstand the rigors of commercial rooftop environments.
• Simplified Integration: Compatible with existing enthalpy or dry-bulb sensors in Daikin/McQuay systems.

Is the 470009 compatible with older McQuay units?
Yes, this is the official updated version for the PD470009 and is designed for backward compatibility with McQuay and Daikin commercial equipment using that original part number.

How does this controller prevent coil freezing?
The module monitors mixed air temperature. If temperatures drop below the MAT low setpoint (typically 45°F), the controller will adjust the outside air damper to protect the coil from freezing.

Does this support CO2-based ventilation?
Yes, when paired with the appropriate CO2 sensors, the 470009 can manage Demand Controlled Ventilation (DCV) to ensure occupant comfort while minimizing energy waste.

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.