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Demand Defrost Sensor

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Evaporator efficiency is critical to energy savings for any cold storage facility. During operation at temperatures below freezing, evaporator surfaces accumulate frost which reduces cooling capacity and energy efficiency. To remove the frost and restore capacity and efficiency, evaporators must be defrosted. The process of defrosting involves warming the evaporator surfaces to melt and remove the frost. This warming process adds some heat to the refrigerated space which must then be removed again by the refrigeration system. Reducing the frequency and duration of defrosts is a simple and effective way to increase the refrigeration system efficiency and reduce power consumption. The new demand defrost sensor available from Colmac Coil functions to initiate the defrost cycle only when a defrost is required and then terminates the defrost cycle as soon as the frost is melted and the unit is ready to return to service.

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