Carrier 331709-797 TXV Kit

The Carrier 331709-797 TXV Kit is a vital OEM replacement part designed for high-capacity residential air conditioning and heat pump systems. Engineered specifically for R-410A refrigerant, this 6 ton thermostatic expansion valve ensures precise metering to maintain optimal superheat and evaporator efficiency. As a hard shutoff TXV, it prevents refrigerant migration during the off-cycle, which is essential for protecting the compressor from liquid slugging upon startup. This factory-authorized kit is frequently utilized in Carrier, Bryant, and Payne equipment, providing a direct fit for units requiring 6 ton cooling capacity. When replacing a factory-installed piston or a failed thermal expansion valve, verify the liquid line and distributor connections to ensure a leak-free seal. For single-phase applications, remember that a hard start kit (start capacitor and relay) is required due to the unequalized pressures inherent in hard shutoff designs. Transitioning to this Carrier HVAC 331709-797 TXV restores system performance and protects high-value components in demanding environments.

• Optimized Refrigerant Control: Delivers precise flow management for 6 ton R-410A systems to maximize EER and SEER ratings.
• OEM Compatibility: Guaranteed fit for Carrier, Bryant, and Payne models, reducing field modification time.
• Compressor Protection: The hard shutoff design prevents liquid refrigerant from entering the suction line during downtime.
• Complete Installation Kit: Includes the 331709-797 TXV, bulb clamps, and necessary hardware for a professional-grade replacement.

Is the 331709-797 compatible with older R-22 systems?
No, this kit is specifically calibrated for R-410A refrigerant and will not function correctly in R-22 or R-407C systems due to different pressure-temperature relationships.

Does this 6 ton TXV require a hard start kit?
Yes, because this is a hard shutoff thermal expansion valve, pressures do not equalize during the off-cycle. A start capacitor and relay are necessary for single-phase compressors to overcome the head pressure at startup.

Can I use this kit to replace a fixed orifice piston?
Yes, this is an ideal upgrade for 6 ton air conditioning coils. Ensure the original piston is completely removed before installing the TXV to prevent severe flow restriction and system failure.

This item is not eligible for free shipping.

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.