Converting the Microchannel Coil in the Carrier® AquaSnap® Chiller: Improve performance and reliability

When it comes to commercial HVAC systems, the Carrier AquaSnap chiller is one of the most commonly used units. However, many owners face recurring issues due to its all-aluminum microchannel condenser coils. If you're looking for a reliable solution, converting to a copper tube, aluminum fin coil might be the best option.

Microchannel coils have been widely adopted in the industry for their cost-effectiveness and reduced refrigerant use. But they come with several drawbacks that can affect performance and increase maintenance costs over time.

A Carrier AquaSnap chiller equipped with all-aluminum microchannel coils.

The Challenges of Microchannel Coils

One of the biggest issues with microchannel coils is their susceptibility to dirt buildup. Without regular cleaning, this can lead to increased head pressure and system inefficiencies. Plus, these coils require precise refrigerant charging due to their low refrigerant capacity. Any miscalculation can result in poor performance or even system failure.

Repairing microchannel coils is also more complex. It often requires specialized techniques like two-part epoxy or torch welding, which can be both time-consuming and risky. Aluminum is also vulnerable to weathering and corrosion, making repairs less durable over time. Another common issue is connection leaks where copper and aluminum meet, which can lead to costly refrigerant loss.

Why Choose a Copper Tube, Aluminum Fin Coil?

Switching to a high-quality copper tube, aluminum fin coil offers numerous advantages. Not only does it improve system performance, but it also increases reliability and extends the life of your chiller. This type of coil is easier to maintain and repair, saving you time and money in the long run.

Key benefits include:

• Enhanced durability – Copper tubes are more resistant to damage and wear compared to aluminum.
• Easier repairs – Unlike microchannel coils, copper tube coils can be easily welded and maintained without special tools.
• System pump-down capability – With copper coils, you can pump down the refrigerant during repairs, eliminating the need to recover the entire system’s refrigerant.
• Reduced long-term costs – Fewer leaks and less frequent repairs mean lower maintenance expenses and better overall efficiency.

A Carrier AquaSnap chiller fitted with copper tube, aluminum fin coils.

Completing the Circuit Properly

If you're replacing the microchannel condenser coil with a copper tube version, it's essential to complete the circuit properly. For example, if your unit has four coils per circuit and one fails, you must replace all four to ensure balanced refrigerant flow and pressure. Mixing microchannel and copper tube coils can cause operational problems due to differences in pressure drop and refrigerant charge requirements.

Why Choose Us for Your Microchannel Conversion?

While the Carrier AquaSnap is one of the most common units requiring a microchannel conversion, this upgrade is available for a wide range of commercial HVAC systems. At Nationwide Coils, we’ve completed thousands of conversions over the years, earning us the title of #MastersOfMicrochannelConversion.

If you're ready to upgrade your system and enjoy improved performance and reliability, contact our experts today. Call 1-888-CoilPro or email us anytime. Just provide the make and model of your unit, and we’ll get started right away.