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More detailed information can be found in the User Manual. The EC2-311 is a dedicated refrigeration controller with superheat control and a driver for an Alco Controls Electric Control Valve EX2. In addition the EC2-311 controls air temperature and manages defrost and fan(s). Network 1 2 3 4 5 6 7 9 8 Two ECN-Pxx pipe temperature sensors (1) and (2) measure saturated suction gas temperatures at the evaporator inlet and outlet and feed the signals into the superheat control loop. The superheat co