Daikin-McQuay 106489112 TXV

The Daikin-McQuay 106489112 Thermostatic Expansion Valve (TXV) is a critical precision metering device designed for high-efficiency R-410A refrigerant systems. Engineered with a 2-ton cooling capacity, this valve features solid copper 5/8" x 1/2" ODF solder connections to ensure leak-free integration into the liquid line. As an OEM replacement component, the 106489112 is calibrated to maintain optimal superheat settings, preventing liquid slugging and protecting the compressor during variable load conditions. The thermal bulb assembly provides rapid response to suction line temperature changes, ensuring maximum evaporator coil efficiency. This Daikin-McQuay OEM TXV is built for durability in residential and light commercial heat pump or straight-cool applications where precise refrigerant flow control is required to meet SEER performance ratings. Proper installation requires brazing with a nitrogen purge and wrapping the valve body with a wet rag to protect internal diaphragms from heat damage.

• System Compatibility: Explicitly designed for R-410A HVAC systems with a 2-ton nominal capacity.
• Connection Precision: Features 5/8" suction and 1/2" liquid ODF sweat connections for standard copper piping.
• Internal Balance: Optimized for maintaining consistent evaporator superheat across fluctuating ambient temperatures.
• OEM Reliability: Genuine Daikin-McQuay replacement part ensures exact fitment and factory-spec performance.
• Construction: Corrosion-resistant brass body with stainless steel power element for long-term reliability in high-pressure environments.

Is the Daikin-McQuay 106489112 compatible with R-22 systems?
No, this 2-ton TXV is specifically calibrated and charged for R-410A refrigerant pressures. Using it with R-22 will result in improper metering and potential system failure.

Does this valve include the internal check valve for heat pump applications?
Yes, this thermal expansion valve is designed to handle the flow requirements of standard heat pump cycles and air conditioning units within its tonnage rating.

What are the symptoms of a failing 106489112 TXV?
Common indicators include erratic suction pressures, evaporator coil icing, or high superheat readings, often caused by a lost power element charge or internal debris clogging the orifice.

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.