Description
The Copeland 066662 is a precision-engineered Thermal Expansion Valve (TXV) designed for reliable refrigerant metering in R410A residential and light commercial cooling systems. Rated for 3-ton capacity, this externally equalized valve ensures accurate superheat control across a wide range of operating conditions, making it an ideal replacement or OEM-spec component for split-system air conditioners and heat pumps.
Key Features
- Refrigerant: R410A compatible
- Capacity: 3 Ton
- Inlet connection: 3/8″ sweat (ODF)
- Outlet connection: 1/2″ sweat (ODF)
- Body style: Straight body design for straightforward installation
- Capillary tube length: 5 feet for flexible bulb placement
- Equalization type: Externally equalized for accurate superheat control in systems with distributor pressure drop
- Included adapters: Chatleff and Aeroquip adapters included for versatile connection options
Why Choose an Externally Equalized TXV?
Externally equalized TXVs reference downstream evaporator pressure directly at the outlet, compensating for pressure drop across the distributor and evaporator circuits. This results in more stable superheat control, improved system efficiency, and better protection of the compressor — especially in multi-circuit evaporator applications common with R410A systems.
Included Adapters
- Chatleff adapter: Industry-standard fitting for quick-connect service port compatibility
- Aeroquip adapter: Provides additional connection flexibility for various system configurations
Typical Applications
- R410A split-system air conditioners
- R410A heat pumps
- Light commercial cooling equipment rated at 3-ton capacity
- OEM replacement and field retrofit installations
Installation Notes
The 5-foot capillary tube provides ample reach for proper thermal bulb placement on the suction line. Always braze connections using nitrogen purge, and ensure the external equalizer line is connected to the suction line downstream of the bulb location. Refer to the system manufacturer’s service documentation for superheat target values.
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