EVD Well Dual Uni-polar EEV Controller - Suzhou CORESTAR Technology

Dual Uni-polar EEV Controller

EVDWell controller can be connected to either of the following:
• a UX* controller via RS485/Modbus;
• a supervisor or IoT platform via RS485/Modbus.
In this case, On/Off control is performed via digital input 1 for EEVA and digital 2 for EEVB, if suitably configured. As
well as regulation start/stop, digital inputs 1 and 2 can be configured for the following:
– valve regulation optimization after defrosts;
– valve forced open (at 100%);
– regulation backup;
– regulation security.
Another possibility involves operation as a simple positioner with 4 to 20 mA or 0 to 10 Vdc analogue input signal.

EVDWell has two build-in LED displays and one keypad with four keys, so that the user can change/configure

parameters easily. normally, the user just needs 4 parameters to start basic regulation:
• refrigerant
• Valve
• Pressure sensor
• main regulation

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Features and benefits

One controller can manage 2 valves independently;

RS485 bus with standard Modbus RTU;

Compatibility with various types of valves;

Superheat control with protection functions for low superheat LowSH,MOP, LOP;

Build-in LED display and keypad, easy to check/change/config parameters;

Parameters protected with password;

Supports both 0.5V~4.5V and 4~20 mA pressure transducer;

Supports both NTC and PT1000 temperature probes;

4~20 mA or 0~10 Vdc input to use the controller as a positioner controlled by an external signal;

Management of power failures with valve closing (both 24Vac and 24Vdc);

Pre-position time settable by parameter;

4 to 20 mA pressure transducer can be shared between up to 5 drivers;

Documents

EVDWell datasheet V1.0

File type: Datasheet
File size: 1 MB
Language: EN

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Applications

Display Cabinet

CORESTAR can provide the cabinet control solutions you need to fit your needs – and more specifically, your higher efficiency. We design with all store types in mind, and the ultimate goal of efficiently keeping food fresh and displayed in a way that will maximize your sales opportunities. The unit can be fitted with different type probes so as to adjust production. The set point can be set according to the specific needs and features of each individual type of food.

Cold Rooms

The cold chain includes cold storage facilities such as cold rooms. These facilities are used to store or process chilled and frozen products. They can be located within the actual processing facility or somewhere in the distribution chain.

Compressor Racks

The compressor racks unit is the most important and complex equipment in the refrigeration system. It uses multiple compressors, condensing fans, sensors and evaporators with the same refrigerant. As compressors operate in this system, they create a cumulative cooling effect.

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We engineer controllers that increase unit efficiency and reduce energy consumption. We provide a wide range of products, services and solutions using innovative technologies, with a commitment to quality, reliability and innovation rooted in our culture.