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

Replacing condenser coils in commercial chillers is a common challenge, especially when it comes to the popular Carrier AquaSnap system. One of the most effective solutions is converting its all-aluminum microchannel coil into a copper tube, aluminum fin coil. This upgrade not only enhances performance but also improves overall reliability and longevity.

Microchannel coils have been widely used in HVAC systems for over a decade, including in Carrier units and other OEM equipment. They are cost-effective and help reduce refrigerant usage. However, they come with several drawbacks that can affect system performance and maintenance.

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

The Drawbacks of Microchannel Coils

One major issue with microchannel coils is their tendency to become clogged easily, similar to a dryer filter. If not maintained regularly, this can lead to high head pressure and operational problems. Additionally, these coils require precise refrigerant charging due to their low refrigerant capacity. Repairing them is also more complex, often requiring two-part epoxy or a torch, which can be time-consuming and risky, especially in harsh weather conditions. Leaks at the connection points between copper and aluminum are also common, leading to further inefficiencies.

Why Upgrade to Copper Tube, Aluminum Fin Coils?

Switching to a high-quality copper tube, aluminum fin coil offers numerous advantages. It's more durable, easier to repair, and allows for system pumping down during repairs, saving both time and money. Unlike microchannel coils, which have smaller refrigerant capacities, copper tube coils allow for more efficient refrigerant management. This means fewer repairs, less refrigerant loss, and greater cost savings over the life of the unit.

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

Completing the Circuit: A Critical Step

When replacing a microchannel coil with a copper tube coil, it's important to complete the circuit properly. For example, if your unit has eight microchannel coils divided into two circuits (four per circuit), and one coil is faulty, you must replace all four in that circuit. This ensures consistent refrigerant flow and prevents operational issues caused by mismatched pressure drops between the old and new coils.

Expert Solutions for All Major Brands

While the Carrier AquaSnap is one of the most common units that benefit from a microchannel conversion, this upgrade is available for a wide range of commercial HVAC systems. With years of experience, Nationwide Coils has successfully converted thousands of microchannel coils across various brands and models.

If you're looking to improve the performance and reliability of your chiller, contact the experts today. Call 1.888.CoilPro or email us for more information. Just provide the make and model of your unit, and we’ll get started on your custom solution.