Emerson Alco 049638 Expansion Valve

The Emerson Alco 049638, also designated as Model AAE 4 HCA, is a high-performance thermal expansion valve engineered specifically for air conditioning and heat pump applications. This externally equalized TXV features a 4-ton capacity optimized for R22 and R407C refrigerants, utilizing a specialized heat pump charge to ensure reliable superheat control across varying ambient conditions. Designed with a straight body and 3/8" x 1/2" ODF sweat connections, this valve facilitates a clean installation in tight evaporator coils. The 30-inch capillary tube provides the flexibility needed for proper sensing bulb placement, crucial for preventing liquid slugging and maintaining system efficiency. By accurately modulating refrigerant flow based on evaporator load, the AAE 4 HCA 30IN protects the compressor and ensures stable performance in high-demand residential or light commercial systems.

Key Benefits

• Optimized Superheat Control: Specifically calibrated for R22 and R407C heat pump systems to maintain precise evaporator efficiency.
• Durable Construction: Features a stainless steel power assembly to prevent corrosion and ensure long-term mechanical integrity.
• Flexible Installation: The 30-inch capillary and ODF sweat connections allow for versatile mounting in various air handler configurations.
• External Equalization: Compels accurate refrigerant metering by compensating for pressure drops across the evaporator coil.

Common Questions

Is the AAE 4 HCA compatible with R410A systems?
No, this specific model is designed and calibrated for R22 or R407C applications. Using it with R410A will result in incorrect superheat and potential system failure.

Can this valve be used in bi-flow applications?
Yes, the HCA charge is specifically intended for heat pump cycles, allowing the valve to function effectively during both heating and cooling modes.

What is the benefit of the stainless steel power assembly?
The stainless steel construction resists acid and moisture corrosion, which is vital for preventing diaphragm failure in high-cycle HVACR environments.

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.