Johnson Controls A19ZBC-2 Penn Controls Defrost Duration and Fan Delay 45°F/85°F 6 ft

The Johnson Controls A19ZBC-2 Penn Controls Defrost Duration and Fan Delay is a control that is essential for HVAC systems. With the help of certain temperature parameters, it decides when to turn ON the defrost controls and when to turn ON the fans. It has a remote bulb sensor to measure temperatures between 45°F and 85°F and initiate defrost cycles to clear ice on coils if needed. By so doing, it is made possible to have effective heat transfer and eliminate cases of system failure caused by the formation of frosts. Powered at 120V, the employs a SPDT switch for optimum operation. The manual changeover and the set dial display give easy-to-use and easy-to-adjust features of the product.