Water or condensate in coils at an ambient temperature of 32° F or less, will freeze and expand. And, if cold air blows across the surface of coils (such as by a fan), freezing can accelerate.
When frozen water expands within coils, this expansion causes internal coil pressures to reach dangerous levels. If internal coil pressure exceeds the design limits of tubes, headers, or return bends, any or all of these critical components can burst.
SentryGuard™ pressure relief coils form a last line of defense against major damage!
If internal coil pressure approaches the design limits, a specially designed plate ruptures. This action releases pressure when and where the relief is needed.
Freeze severity determines how many SentryGuard™ relief caps rupture.
While there are some measures you can take to protect against coil freeze (e.g. freezestats, control systems or reheat coils), none provide 100% protection against freeze. You may not be able to prevent coil freeze, but you CAN prevent its damage with SentryGuard™ Burst Resistant Coils!
Click below to watch the SentryGuard™ video on YouTube