Lennox 49K42 - Expansion Valve (VALVE-EXPANSION)
The Lennox 49K42 Expansion Valve is a critical metering device engineered to deliver precision refrigerant flow control in residential and light commercial HVAC systems. This valve is specifically designed to match Lennox system specifications, ensuring compatibility and seamless operation for optimal cooling efficiency and compressor protection.
Product Overview:
The expansion valve (also known as a TXV or thermostatic expansion valve) regulates the amount of liquid refrigerant entering the evaporator coil. It reacts to superheat conditions by modulating the flow, maintaining ideal pressures and temperatures throughout the refrigeration cycle. This dynamic control prevents system overload, reduces energy consumption, and enhances long-term system durability.
The expansion valve (also known as a TXV or thermostatic expansion valve) regulates the amount of liquid refrigerant entering the evaporator coil. It reacts to superheat conditions by modulating the flow, maintaining ideal pressures and temperatures throughout the refrigeration cycle. This dynamic control prevents system overload, reduces energy consumption, and enhances long-term system durability.
Technical Specifications:
- Part Number: 49K42
- Component Type: Thermostatic Expansion Valve
- Function: Metering device that regulates refrigerant flow based on evaporator conditions
- Refrigerant Type: Compatible with system-specified refrigerants (verify with Lennox documentation)
- Inlet/Outlet Fittings: Designed to match standard copper tubing connections in Lennox units
- Superheat Adjustment: Factory-set, with adjustment capability for custom tuning
- Mounting: Includes bracket or strap-compatible body for secure placement within the refrigeration circuit
Key Features:
- Precision Control: Delivers accurate refrigerant flow for stable superheat levels
- Improved Efficiency: Reduces energy waste and supports SEER-rated system performance
- Durable Construction: Machined brass body resists corrosion and mechanical stress
- System Protection: Prevents liquid slugging in the compressor, extending compressor life
- Quiet Operation: Reduces system noise by maintaining balanced refrigerant pressures
- Field Serviceable: Allows for inspection, adjustment, and replacement when necessary
Applications:
- Used in Lennox air conditioners and heat pumps
- Compatible with specific Lennox indoor coil and outdoor unit combinations
- Ideal for both retrofit and new installation applications requiring precise refrigerant metering
Installation Guidelines:
- Install by EPA-certified HVAC professionals
- Ensure correct orientation and secure connections
- System must be properly evacuated, charged, and tested for leaks after installation
- Superheat should be verified and adjusted during commissioning
Availability:
The Lennox 49K42 Expansion Valve is in stock and ready to ship from Beenimax. Trust us for genuine Lennox components that support system performance, reliability, and warranty compliance.