Allied Air 70M29 Furnace Txv Expansion Valve R-22

Product Description

The ALLIED AIR 70M29 is a thermostatic expansion valve (TXV) designed for R-22 refrigerant systems in residential gas furnace applications. The TXV meters refrigerant flow into the evaporator coil, maintaining the proper superheat level for efficient system operation. Rated for 1.5 to 3 ton systems, this valve is a direct replacement component installed by licensed HVAC technicians during service or system repair. Correct TXV sizing and refrigerant compatibility are critical to system efficiency and coil longevity.

This expansion valve is intended for use in furnace-based split systems utilizing R-22 refrigerant in the 1.5 to 3 ton capacity range. It is suited for residential HVAC installations where the evaporator coil is mounted on or near the furnace air handler. Install scenarios typically include coil replacement, refrigerant circuit repair, or TXV failure diagnosis in existing R-22 equipment.

Key Features

• Designed for R-22 refrigerant systems
• Covers 1.5 to 3 ton system capacity range
• Functions as a direct replacement TXV for compatible furnace coil assemblies
• Meters refrigerant flow to maintain proper evaporator superheat
• Compact form factor suited for residential furnace coil installation

Compatibility

Designed for use on 1.5 to 3 ton furnace-based R-22 split systems. Consult equipment documentation to confirm TXV connection size and bulb charge compatibility before installation.

Installation Notes

Installation must be performed by an EPA 608-certified HVAC technician, as this component is part of a sealed refrigerant circuit. Recover all refrigerant from the system before removing the existing TXV, in compliance with EPA regulations. Ensure the system is fully depressurized and isolated before disconnecting refrigerant lines. Proper bulb placement and insulation on the suction line are essential for accurate superheat sensing after installation.

Technical Specifications

• Type: Thermostatic Expansion Valve (TXV)
• Refrigerant: R-22
• Capacity Range: 1.5 to 3 ton
• Weight: 1.1 pounds

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: 70M29