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Eliwell EWRC 300 NT User Manual

Eliwell EWRC 300 NT
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EWRC 300/500 NT
Controllers for cold rooms for on-board installation
USER
MANUAL

Table of Contents

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Eliwell EWRC 300 NT Specifications

General IconGeneral
TypeElectronic Controller
Power Supply24 V AC/DC ±10%
Temperature Range (PTC)-50°C to +150°C
Input TypeNTC, PTC, Pt100, Pt1000, TC J, TC K
OutputsRelay
Operating Temperature-10°C to +55°C
Accuracy±0.5% fs + 1 digit
Resolution0.1°C
Digital inputsUp to 2 digital inputs
Serial communicationRS485 (optional)
CommunicationModbus RTU
BuzzerOptional

Summary

3. Connections

3.1. General Warnings

Important safety precautions and general guidelines for electrical connections.

3.1.1. Power Supply - Dangerous Voltage Outputs (Relay)

Specific warnings regarding power supply and dangerous voltage outputs.

3.2. Wiring Diagram

Visual representation of the controller's wiring connections.

3.2.1. Terminals

Table detailing the function of each terminal on the controller.

3.3. Wiring Diagram for Models with Magneto-Thermal Switch Installed

Wiring diagram specific to models with a magneto-thermal switch.

3.3.1. Terminals

Terminal functions for models with magneto-thermal switch.

4. Mechanical Installation

4.1. Mechanical Installation

General guidance on installing the device in suitable environments.

4.1.1. Wall-Mounting

Step-by-step instructions for mounting the controller on a wall.

6. Functions and Regulators

6.4. Compressor

How the controller manages the compressor based on temperature and functions.

6.4.1. Compressor Configuration

Configuration of compressor relay and output association.

6.5. Compressor/General Protections

Protections and operating modes for the compressor and general outputs.

6.5.1. Compressor Safety Timings

Safety times for compressor on-off operations, including delays.

6.6. Defrost/Dripping

Explanation of defrost and dripping functions to prevent ice formation.

6.6.1. Defrost Type and Activation

How to select defrost type (electric, inverse, free) and activation methods.

6.6.2. Automatic Defrosting

How automatic defrost cycles are programmed and initiated.

6.7. Defrost Mode

Details on different defrost modes.

6.7.1. Defrost with Electric Heaters

Configuration and operation of defrost using electric heaters.

6.7.2. Inverse Defrost

Configuration and operation of hot gas defrost.

6.7.3. Double Evaporator Defrost

How to manage defrost for systems with two evaporators.

6.8. Evaporator Fans

How the controller manages evaporator fans.

6.11. Pressure Switch

Regulator for pressure switch inputs and alarm handling.

6.12. Door/External Alarm Management

Management of door switch inputs and external alarms.

6.14. Condenser Fans

Control and configuration of condenser fans.

7. Parameters

7.1. How to Modify the User Parameters

Step-by-step guide to modify user parameters.

7.2. How to Edit the Installer Level Parameters

Step-by-step guide to edit installer level parameters.

7.3. Parameter Table

Comprehensive table listing all controller parameters, their levels, and descriptions.

8. Alarms

8.1. Alarms and Signals Table

Table listing alarm codes, descriptions, and parameters involved.

8.2. Alarm Cause/Effect Table

Table detailing causes, effects, and remedies for various alarms.

8.3. Description of Alarms

Detailed descriptions of specific alarm types.

8.3.1. Probe Alarm

Explanation of probe errors (E1, E2, E3) and their actions.

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