Manual RADION(人工放射微粒).pdfVIP

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Manual RADION(人工放射微粒)

Refrigeration and Air Conditioning Controls Manual Controller for control of industrial evaporator - EKC 315A ADAP-KOOL® Refrigeration control systems R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G Introduction Application The controller and valve can be used where there are requirements to accurate control fo superheat and tempera- ture in connection with refrigeration. E.g.: • Cold store (air coolers) • Processing plant (water chillers) • A/C plant Advantages • The evaporator is charged optimally – even when there are great variations of load and suction pressure • Energy savings – the adaptive regulation of the refrigerant injection ensures optimum utilisation of the evaporator and hence a high suction pressure • Exact temperature control – the combination of adaptive evaporator and temperature control ensures great tem- perature accuracy for the media • The superheating is regulated to the lowest possible value at the same time as the media temperature is controlled by the thermostat function Functions • Regulation of superheat • Temperature control • MOP function • ON/OFF input for start/stop of regulation • Input signal that can displace the superheat reference or the temperature reference • Alarm if the set alarm limits are exceeded • Relay output for solenoid valve • PID regulation • Output signal following the temperature showing in the display System The superheat in the evaporator is controlled by one pres- sure transmitter P and one temperature sensor S2. The valve can be one of the following types: • TQ (PHTQ, TEAQ) • AKV (AKVA) TQ is a modulating valve, and when this is used a solenoid valve must also be used in the liquid line. AKV is a pulsating valve. Where the AKV valve is used it also functions as solenoid valve. Temperature c

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