Emerson Alco 065873 Expansion Valve

For contractors servicing high-efficiency residential systems, the Emerson Alco 065873 expansion valve (Model AACE 3 ZW195) provides the 3-ton capacity and precision control required for R410A refrigerant applications. This thermostatic expansion valve (TXV) is engineered with a stainless steel power element to prevent corrosion and ensure a hermetic leak-free construction, critical for long-term system integrity in demanding environments. Featuring an internal check valve, this component is ideally suited for heat pump systems, allowing for reverse flow without the need for additional external check valves or complex piping. The externally equalized design accurately monitors evaporator outlet pressure, compensating for pressure drops across the coil to maintain stable superheat levels. Equipped with a ZW195 low-temperature MOP charge, it protects the compressor by limiting the maximum operating pressure to 195 PSI during high-load startups. With a compact, straight-through body and 3/8" x 1/2" ODF sweat connections, this valve integrates seamlessly into tight air handler or evaporator coil cabinets.

• Heat Pump Compatible: Integrated internal check valve permits reverse flow, simplifying heat pump installations.
• Compressor Protection: The 195 PSI MOP (Maximum Operating Pressure) charge prevents motor overload during high suction pressure conditions.
• Precision Control: External equalization ensures accurate superheat management, optimizing the TXV for R410A systems.
• Durable Build: Stainless steel power element and laser-etched markings provide permanent legibility and resistance to environmental failure.
• Installation Efficiency: Straight-body design with 5-foot capillary tube offers flexibility for remote bulb placement on the suction line.

• How do I set the superheat on this AACE model? This valve features an adjustable superheat setting. Use the internal adjustment screw; turning clockwise increases superheat, while counter-clockwise decreases it. Allow 15-30 minutes for the system to stabilize after adjustments.
• Where should I mount the external equalizer line? The 1/8" equalizer tube must be connected to the suction line within 6 inches of the sensing bulb, positioned to avoid oil siphoning from the line.
• Can this valve be used for refrigeration? While primarily designed for A/C and heat pumps, the 195 PSI MOP charge is specific to R410A HVAC applications. Verify your evaporator temperature range before use in commercial refrigeration.

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.