Johnson controls A421 Digital temperature control installation.
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Manage cooling, defrost, alarms, communications and costs with the PENN A421 refrigeration controller. It offers a wide range of options that allow for customized control functions. Its scrolling display is easy to use and provides walk-through instructions for each step of the setup process. Get in touch with our experts to learn more: https://on.jci.com/4b8H35C | Johnson Controls
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Johnson Controls’ A421 Series Electronic Temperature Controls are single stage controls with a single-pole, double-throw output relay. http://www.galco.com/buy/Johnson-Controls/A421GBF-02C | Galco
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