Emerson Alco 059333 Power Assembly

The Emerson Alco 059333 Power Assembly, specifically model XC-726HCA2B, is a heavy-duty replacement component designed for high-performance thermostatic expansion valves (TXVs). Engineered for systems utilizing R22 refrigerant, this assembly features a 1/4" SAE flare equalizer connection, ensuring precise pressure sensing across the evaporator coil. With a 10-foot capillary tube, it offers significant installation flexibility for complex refrigeration rack configurations and commercial air conditioning units. This power element is rated for an application temperature range of -20°F to +50°F, making it ideal for medium to high-temperature evaporative loads. The stainless steel diaphragm construction resists corrosion and provides consistent superheat control under fluctuating head pressures. Each kit includes the necessary capscrews for a secure mechanical seal to the valve body, minimizing the risk of refrigerant leaks during high-vibration operation. For technicians servicing legacy R22 systems, this large-capacity power assembly ensures reliable modulation and prevents liquid slugging in the compressor.

Key Benefits for the Contractor:

• Precise Superheat Control: The XC-726 power head design provides stable valve modulation to protect the compressor and maximize evaporator efficiency.
• Extended Reach: A 10-foot capillary length allows for remote bulb mounting in tight mechanical spaces where the valve body is inaccessible.
• Durable Construction: High-grade stainless steel ensures long-term resistance to metal fatigue and chemical degradation from refrigerant oil.
• Efficient Field Replacement: Includes mounting hardware to facilitate a rapid swap-out of the power element without replacing the entire TXV body.

Common Installation Questions:

Is the XC-726HCA2B compatible with other refrigerants?
This specific power assembly is charged for R22 refrigerant systems. Using it with different refrigerants will result in incorrect pressure-temperature curves and potential system failure.

What is the purpose of the 1/4" SAE equalizer?
The external flare equalizer compensates for the pressure drop across the evaporator, ensuring the TXV maintains the correct superheat regardless of coil length or distributor pressure loss.

Does this power assembly include the bulb dampening material?
While the assembly includes the power head, capillary, and bulb, it is recommended to use thermal insulation tape or specialized bulb clamps to ensure accurate temperature sensing on the suction line.

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.