Description
Copeland TFES 16 ZAA Thermal Expansion Valve Overview
The Copeland 066151 is a high-performance Thermal Expansion Valve (TXV) engineered for R410A refrigerant systems operating at up to 16 tons of capacity. Featuring a straight body design with a wide range charge, this valve delivers precise refrigerant metering across a broad range of operating conditions — making it an ideal choice for commercial and light-industrial HVAC applications where consistent superheat control is critical.
Key Features
- Model: TFES 16 ZAA 7/8 X 1 1/8 ODF S/T
- Refrigerant: R410A compatible
- Rated Capacity: 16 Tons
- Body Style: Straight body
- Charge Type: Wide range charge for versatile operating range
- Equalization: Externally equalized for accurate superheat control in systems with significant pressure drop across the evaporator
- Inlet Connection: 7/8″ ODF sweat (solder)
- Outlet Connection: 1-1/8″ ODF sweat (solder)
- Capillary Tube Length: 10 feet for flexible bulb placement
- Connection Type: Sweat (ODF) — compatible with standard copper tubing
Why External Equalization Matters
The external equalizer port senses evaporator outlet pressure directly, compensating for pressure drops across the evaporator coil. This ensures accurate superheat control and protects the compressor from liquid slugging — especially important in larger tonnage systems and those with distributor assemblies.
Wide Range Charge Advantage
The wide range charge allows this TXV to maintain stable superheat control over a wider span of load conditions compared to standard gas charge valves. This makes the TFES 16 ZAA well-suited for systems that experience variable load profiles or fluctuating ambient conditions.
Applications
- Commercial split systems and packaged units using R410A refrigerant
- Rooftop units (RTUs) with 16-ton evaporator coils
- Air handler and fan coil unit refrigerant circuits
- Replacement TXV in systems requiring 7/8″ x 1-1/8″ ODF sweat connections
Specifications Summary
- SKU: 066151
- Brand: Copeland
- Model Number: TFES 16 ZAA 7/8 X 1 1/8 ODF S/T
- Refrigerant: R410A
- Capacity: 16 Tons
- Inlet Size: 7/8″ ODF Sweat
- Outlet Size: 1-1/8″ ODF Sweat
- Capillary Tube: 10 feet
- Charge Type: Wide Range
- Equalization: External
- Body Style: Straight
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