**Site Bite: Ruptured U-Bends in a Frozen Water Coil**
Bundle up, as we head out with Jack Kessler to take a look at one of the most common issues during the cold season — a frozen water coil.
This is the story of a Dunham-Bush® unit that suffered serious damage due to freezing. Located in a New York City condo complex, the unit was exposed to extremely low temperatures because it used 100% outside air. When the temperature dropped below freezing, the water inside the copper tubing turned to ice and expanded, causing the U-bends to rupture.
The unit had a 2-row hot water coil and a 4-row chilled water coil with 5/8" copper tubing. The problem started when the freeze stat, which should have triggered the dampers to close, failed. As a result, the dampers stayed open, allowing freezing air to enter and cause damage.
So, what’s the best fix? Repair or replace?
In this case, the team decided to replace the entire coil. But not all situations are the same. Depending on factors like accessibility, the unit’s importance, and the coil’s age, repairing via brazing can be a viable option. If the coil is easily accessible and the unit is critical, brazing offers a quick and cost-effective solution. However, if the coil is old or the damage is extensive, replacement may be the better long-term choice.
Whether you're dealing with a frozen water coil or any other type of coil, we’ve got you covered. At Nationwide Coils, we specialize in custom and OEM replacement coils for all makes and models — no matter how old your system is.
Need help? **Email us for a quote** today.
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**Written by: Jack Kessler**
**Intern, Nationwide Coils**
WD-G03-3C11 Series Direction Valves
Wd-G03-3C11 Series Direction Valves,Electromagnetic Reversing Valve,Hydraulic Directional Control Valve,Hydraulic Directional Control Valves
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