Nordyne 669552R TXV Valve

The Nordyne 669552R TXV Valve is a high-precision HVAC expansion valve engineered for 2.5-ton systems utilizing R22 refrigerant. As a direct OEM replacement part for the obsolete 669552, this 2.5-ton thermostatic expansion valve ensures exact refrigerant metering to maintain target superheat and prevent evaporator flooding. Featuring a 3/8-inch Chatleff x Sweat connection and a copper body, the Nordyne 669552R is designed for seamless integration into residential air conditioners and heat pumps. This R22 thermal expansion valve utilizes an external equalizer to monitor pressure drops across the coil, optimizing system efficiency and protecting the compressor from liquid slugging. Built to rigorous Nordyne replacement parts standards, it provides the reliability needed for critical field repairs where maintaining legacy R22 equipment performance is paramount. Use this HVAC TXV 2.5 ton valve to restore factory-spec cooling capacity and energy efficiency in compatible Nordyne-manufactured units.

• Precise Refrigerant Control: Regulates R22 flow to the evaporator for consistent thermal performance and optimal superheat.
• Drop-in Compatibility: Specifically designed as the current replacement for the 669552 model, ensuring a perfect fit for 2.5-ton units.
• Durable Construction: High-grade copper body with reliable Chatleff x Sweat fittings for leak-proof operation in high-pressure environments.
• System Protection: Helps prevent common failure modes such as compressor flooding and evaporator starving by maintaining balanced pressure.

Is the 669552R compatible with R410A systems?
No, this valve is strictly engineered for use with R22 refrigerant. Using it with R410A will lead to incorrect metering and potential equipment damage.

What are the symptoms of a failing Nordyne 669552R TXV?
Common indicators include low suction pressure, high superheat, or frost buildup on the evaporator coil, often caused by the valve sticking closed or a lost charge in the sensing bulb.

Does this valve require an external equalizer line?
Yes, this model is designed with an external equalizer connection to accurately sense evaporator outlet pressure and maintain a constant superheat.

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.