Converting the Microchannel Coil in the York® ZJ150: Improve performance and reliability

When it comes to commercial HVAC systems, the York ZJ150 is one of the most commonly used units. However, its all-aluminum microchannel condenser coils can be problematic over time.

Replacing or converting these coils to a copper tube, aluminum fin design is often the best solution for long-term reliability and performance. This type of microchannel conversion is not only efficient but also helps avoid costly repairs and downtime.

Microchannel coils have been widely used in HVAC systems for years due to their lower cost and reduced refrigerant usage. But while they offer some advantages, they come with significant drawbacks that can affect system efficiency and maintenance.

The Challenges of Microchannel Coils

One of the biggest issues with microchannel coils is their susceptibility to clogging. Just like a dirty dryer filter, they can become blocked if not properly maintained, leading to high head pressure and system inefficiency. Additionally, these coils require precise refrigerant charging due to their low refrigerant capacity, making them more sensitive to improper installation or service.

Repairing an aluminum microchannel coil is also more complicated than working with traditional copper tube coils. It often requires specialized tools like epoxy or a torch, which can be risky and time-consuming. Plus, aluminum is more prone to corrosion and weather damage, increasing the likelihood of leaks at the copper-to-aluminum connection points.

Why Upgrade to Copper Tube, Aluminum Fin Coils?

Switching to a copper tube, aluminum fin coil offers several key benefits. These coils are more durable, easier to maintain, and less likely to develop leaks. They also allow for system pump-down during repairs, eliminating the need to recover all the refrigerant first — saving both time and money.

Another major advantage is long-term cost savings. With fewer leaks and easier repairs, you’ll experience fewer service calls and lower maintenance costs over the life of the coil. This makes the upgrade a smart investment for any commercial HVAC system.

What You Need to Know About Circuit Matching

When replacing a microchannel coil with a copper tube version, it's important to complete the circuit properly. For example, if your York ZJ150 has four coils per circuit and one fails, you should replace all four to ensure balanced refrigerant flow and pressure. Mixing old and new coils can cause imbalances and lead to system failure.

Expert Microchannel Conversion Services

While the York ZJ150 is a common candidate for microchannel conversion, this upgrade is available for most major commercial HVAC units. At Nationwide Coils, we’ve helped thousands of customers make the switch, earning us the title of #MastersOfMicrochannelConversion.

If you're looking to improve the performance and reliability of your system, contact our team today. Call 1.888.CoilPro or email us anytime. All we need is your unit’s make and model number to get started on your upgrade.