McQuay Daikin 910110417 Reversing Valve

The McQuay Daikin 910110417 Reversing Valve is an essential 4-way pilot-operated component engineered for 2-ton heat pump systems utilizing R22 or R410A refrigerant. Designed for high-reliability flow reversal, this OEM-spec valve facilitates the critical transition between heating and cooling cycles by redirecting discharge gas from the compressor. For technicians managing older McQuay Mark IV controller setups, verify the solenoid coil voltage; units manufactured prior to 2005 may require a 24V AC solenoid coil conversion or a specific DC relay if the original DC coil has failed. When performing a reversing valve replacement, always remove the solenoid coil before brazing to prevent thermal damage to the internal seals and seat. Maintaining precise HVAC system compatibility is vital for ensuring the pressure differential remains within operational limits, preventing "hang-ups" or incomplete shifts that lead to compressor inefficiency or bypass. This robust heat pump reversing valve provides the durable seating necessary for leak-free performance in demanding commercial and residential applications.

• Multi-Refrigerant Compatibility: Optimized for use with both R22 and high-pressure R410A applications.
• OEM-Grade Reliability: Precision-machined 4-way sliding block ensures positive shifting under full system load.
• Seamless Integration: Direct drop-in fit for McQuay and Daikin 2-ton heat pump units, reducing field modification time.
• Universal Pilot Operation: Utilizes system pressure to assist the shift, ensuring consistent performance across varying ambient temperatures.

How do I prevent damage during installation?
Technicians must wrap the valve body in wet rags and use a heat sink or quenching cloth. Internal temperatures exceeding 250°F will distort the nylon slide and permanent damage will occur.

Does this valve include the solenoid coil?
Typically, the 910110417 is the valve body itself. You must verify if your application requires a 24V AC or 24V DC coil to match the existing control board architecture.

What causes a reversing valve to get stuck?
Common causes include physical debris in the capillaries, a burnt-out solenoid coil, or low system pressure which provides insufficient pilot force to move the internal slide.

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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.