Technical Notice TN14.001 3.2A Transformer Breaker

At the end of November 2014 Enertech’s transformer vendor discovered the 3.2A breakers housed in the 75VA transformer have potential for a no trip failure. Only the water-to-water units are affected because HT, XT, and CT units with factory installed transformers have fuses on the ECM fan board. The ST and RT do not contain a transformer. Also, the MPD and MPH air handlers do not use the 75VA transformer with the 3.2A breaker.

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