1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of the Eliwell EWPLUS 974 Temperature Control unit. Please read this manual thoroughly before installing or operating the device to ensure proper function and safety. The EWPLUS 974 is designed for precise temperature regulation in various industrial and scientific applications.
2. Informació de seguretat
Adherence to safety precautions is crucial for preventing personal injury and damage to the device. Always follow local electrical codes and regulations.
- Risc elèctric: Disconnect power before performing any wiring or maintenance. Only qualified personnel should perform electrical connections.
- Connexió a terra adequada: Assegureu-vos que la unitat estigui correctament connectada a terra per evitar descàrregues elèctriques.
- Condicions ambientals: Do not expose the unit to excessive moisture, dust, or extreme temperatures outside its specified operating range.
- Sensor Handling: Handle temperature sensors with care. Do not bend or crimp sensor cables excessively.
- Ús previst: Use the EWPLUS 974 only for its intended purpose of temperature control.
3. Producte acabatview
The Eliwell EWPLUS 974 is a versatile electronic temperature controller. It comes with necessary accessories for installation and operation.
3.1 Components
- EWPLUS 974 Controller Unit
- 2x SN691300 Temperature Sensors
- Suports de muntatge
- Manual d'instruccions
4. Configuració
4.1 Muntatge
The EWPLUS 974 is designed for panel mounting. Ensure adequate ventilation around the unit.
- Cut a rectangular opening in the panel according to the dimensions provided in the specifications section.
- Introduïu el controlador a l'obertura des de la part frontal.
- Secure the controller using the provided mounting brackets from the rear of the panel.
4.2 Cablejat
All wiring should be performed with the power supply disconnected. Refer to the wiring diagram on the unit's label and the image below for correct connections.
- Font d'alimentació: Connect the 230V AC power supply to the designated terminals (typically L and N).
- Connexions del sensor: Connect the SN691300 temperature sensors to the NTC probe terminals. Ensure correct polarity if applicable.
- Connexions de sortida: Connect the controlled devices (e.g., compressor, fan, defrost heater) to the respective relay output terminals. Observe maximum current ratings.
- Posada a terra: Connect the unit to a reliable earth ground.
5. Instruccions de funcionament
The EWPLUS 974 features a user-friendly interface with a digital display and control buttons.
5.1 Funcionament bàsic
- Encès/apagat: Manteniu premut el botó Poder button (usually marked with a circle and vertical line) to turn the unit on or off.
- View Temperatura: The display typically shows the current measured temperature.
- Access Setpoint: Premeu el botó SET botó una vegada per view el punt de consigna actual.
- Adjust Setpoint: Mentre viewing the setpoint, use the Up i Avall arrow buttons to adjust the desired temperature. Press SET again to confirm and save the new setpoint.
- Menú de paràmetres: To access advanced parameters, press and hold the SET button for several seconds until the first parameter code appears. Use the Up i Avall buttons to navigate through parameters and SET to enter and modify values. Refer to the detailed programming manual for specific parameter codes and their functions.
6. Manteniment
Regular maintenance ensures the longevity and accurate operation of your EWPLUS 974 unit.
- Neteja: Clean the unit's front panel with a soft, damp drap. No utilitzeu productes de neteja abrasius ni dissolvents. Assegureu-vos que no entri líquid a la unitat.
- Comprovació de connexions: Periodically inspect all electrical connections for tightness and signs of corrosion. Loose connections can lead to erratic operation or damage.
- Inspecció del sensor: Check the temperature sensors and their cables for any physical damage or wear. Ensure they are securely positioned in their measuring location.
- Ventilació: Assegureu-vos que les obertures de ventilació de la unitat no estiguin obstruïdes per evitar el sobreescalfament.
7. Solució De Problemes
This section provides solutions to common issues encountered with the EWPLUS 974.
| Problema | Causa possible | Solució |
|---|---|---|
| Display shows 'E1' or 'E2' | Sensor fault (open or short circuit) | Check sensor connections. Replace faulty sensor if necessary. |
| La unitat no s'encén | Sense subministrament d'alimentació; cablejat incorrecte | Verify power supply to the unit. Check power wiring connections. |
| La sortida no s'activa | Setpoint not met; Parameter settings incorrect; Faulty relay | Check current temperature vs. setpoint. Review parameter settings. Test relay continuity (with power off). |
| La lectura de la temperatura no és precisa | Sensor not properly installed; Sensor calibration issue; Sensor fault | Ensure sensor is correctly placed. Check for environmental interference. Consider recalibration or sensor replacement. |
8. Especificacions
Key technical specifications for the Eliwell EWPLUS 974 Temperature Control unit.
| Característica | Detall |
|---|---|
| Número de model | EWPLUS 974 |
| Fabricant | ELIWELL |
| Font d'alimentació | 230 V AC |
| Tipus de sensor | NTC (SN691300 included) |
| Dimensions del paquet | 6 x 4 x 3.7 polzades |
| Pes | 1.02 lliures |
9. Garantia i Suport
For warranty information and technical support, please contact your original seller or the manufacturer, ELIWELL, directly. Retain your proof of purchase for any warranty claims.
