At FRICK® by Johnson Controls, we make it easier to retrofit your current industrial refrigeration controller with the Quantum™ HD Field Retrofit Kit. Put the most powerful type of high definition control right at your fingertips and extend the life of your existing equipment with the proven technology of this advanced kit. Our Quantum™ HD Field Retrofit Kit enables you to retrofit your existing Quantum, 4A or LX controller, all without removing the existing enclosure.