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General description of the EVF214 digital controller for refrigerated cabinets.
Physical size specifications for the user interface unit.
Physical size specifications for the control module unit.
Guidelines for proper instrument placement and mounting.
Instrument power states, display, manual on/off, and output control.
Viewing temperatures, Overcooling, Energy Saving, and Humidity control.
Manual defrosting, demisting heaters, keyboard lock, and buzzer silencing.
Configuring clock, target temperature, and operational parameters.
Resetting to defaults and accessing parameter tables for reference.
Storing and viewing HACCP alarm data and system indicators.
Monitoring compressor hours and understanding signals/indications.
Details various alarm types and provides remedies for each.
Explanation of system error codes and how to resolve them.
Summary of the instrument's technical specifications and operating limits.
Detailed list and description of work set-point parameters.
Details on measurement inputs and compressor protection parameters.
Details on defrosting, temperature alarms, and evaporator fan settings.
Details on digital I/O, energy saving, real-time functions, and Modbus.
Important notes and considerations before making electrical connections.
Visual guide and specific details for electrical hookup.
Advice for safe and correct electrical installation procedures.
The EVF214 is a digital controller designed for managing refrigerated cabinets, suitable for both normal and low-temperature applications. Its design emphasizes ease of cleaning and integration within the cabinet.
The controller operates in a "split" configuration, comprising a user interface and a control module. The user interface, integrated behind a methacrylate sheet, features a 4-digit custom display with icon functions and six capacitive touch keys (set, up, down, defrosting, cabinet light, and on/stand-by). This interface is designed for back panel installation using double-sided adhesive tape, ensuring seamless mechanical and aesthetic integration. The control module is an open-frame board, intended for flat surface installation with spacers.
The EVF214 includes a clock and an alarm buzzer. It offers three measurement inputs for NTC probes (cabinet, evaporator, and condenser) and two digital inputs (door micro switch and multipurpose). It also provides four digital outputs (relays) for managing the compressor (30 A @ 250 VAC), defrost, evaporator fan, and a fourth utility (cabinet light, demisting heater, auxiliary output, alarm output, door heater, evaporator valve, or condenser fan). Defrosting can be electric or hot gas-based.
For configuration and communication, the device features a TTL serial port with MODBUS communication protocol. Parameters can be uploaded and downloaded using an EVKEY programming key (sold separately), and the serial interface (also sold separately) allows connection to the Parameters Manager set-up software or the RICS plants monitoring and supervision system.
The EVF214 supports several functioning states: "on" (powered, regulators active), "stand-by" (powered, regulators off, cabinet light/auxiliary output can be manually switched on/off depending on parameter u2), and "off" (not powered). Upon power restoration, the instrument reverts to its last known state.
To switch the instrument on/off, ensure the keyboard is unlocked and no procedure is in progress. Hold the key down for 2 seconds; the on/stand-by LED will switch on/off. The multipurpose input can also be used for remote on/off control.
When "on," the display shows the cabinet temperature, except during defrosting, when it shows the temperature set by parameter d6. When "off," the display is blank.
To view the evaporator temperature, ensure the keyboard is unlocked and no procedure is in progress. Hold the key down for 1 second to show the first available label. Press and release the or key to select "Pb2", then press and release the key. To exit, press and release the or key, or do not operate for 60 seconds, or press and release the or key until the cabinet temperature is displayed. If the evaporator probe is absent (P3 = 0), "Pb2" will not be displayed.
Similar to the evaporator temperature display, hold the key down for 1 second, select "Pb3" using the or key, and press the key. Exit by pressing the or key, or not operating for 60 seconds, or pressing the or key until the cabinet temperature is displayed. If the condenser probe is absent (P4 = 0), "Pb3" will not be displayed.
Ensure the keyboard is unlocked, no procedure is in progress, and defrosting/dripping/evaporator fan standstill are not active. Hold the key down for 4 seconds; the Overcooling LED will switch on. During this function, the work set-point decreases by the value of parameter r5, and the function lasts for the time set by parameter r6. Defrosting is never activated during Overcooling; if the defrosting interval expires, it activates after the Overcooling function concludes.
Ensure the keyboard is unlocked, no procedure is in progress, and Overcooling is not active. Hold the key down for 4 seconds. If the evaporator probe function is for defrosting (P3 = 1) and the evaporator temperature is above d2, defrosting will not activate.
The evaporator fan's activity during normal functioning is controlled by parameter F0, with options for off, on, parallel to compressor, or dependent on other parameters like F1 or F6. The fan can also be switched off based on evaporator temperature (F1) or during defrosting/dripping (F2).
The Energy Saving function can be activated manually by holding the key down for 4 seconds. The Energy Saving LED will switch on. During this function, the work set-point increases by the value of parameter r4, and the function lasts for the time set by parameter HE2. If the keyboard is locked, the function cannot be activated.
The instrument can store up to 9 HACCP alarms. To view them, hold the key down for 1 second, select "AL" using the or key, and press the key. Use the or keys to scroll through alarms. To delete alarms, select "rLS" and press the key, then confirm with "149".
The instrument can memorize up to 9,999 compressor functioning hours. To display these, hold the key down for 1 second, select "CH", and press the key. To delete, select "rCH" and confirm with "149".
Ensure operating conditions (temperature, humidity) are within technical data limits. Avoid installing near heat sources, strong magnets, direct sunlight, rain, humidity, excessive dust, mechanical vibrations, or shocks. Any metal parts near the control module must maintain safety distances. Proper installation is crucial to ensure protection against contact with electrical parts, with all protective parts fixed securely.
Do not use electric or pneumatic screwdrivers on terminal boards. Allow the instrument to acclimatize for about an hour if moved from a cold to a hot environment before applying power. Verify that power supply voltage, frequency, and operational electric power match local supply. Disconnect power before any maintenance. The instrument is not a safety device. For repairs or information, contact the Evco sales network.
General| Brand | Evco |
|---|---|
| Model | EVF214 |
| Category | Controller |
| Language | English |
