dixell xr60cx operating manual

Dixell XR60CX Operating Manual⁚ A Comprehensive Guide

This comprehensive guide provides a complete overview of the Dixell XR60CX digital controller, a microprocessor-based device suitable for applications involving medium or low-temperature ventilated refrigerating units. This manual serves as a valuable resource for understanding the XR60CX’s features, functions, and operation, empowering users to effectively install, configure, and operate this essential refrigeration component.

Introduction

The Dixell XR60CX is a versatile digital controller designed for efficient management of refrigeration systems. This manual serves as a guide to understanding the features, functionalities, and operational procedures of the XR60CX. The XR60CX is a microprocessor-based controller, suitable for applications in medium or low-temperature ventilated refrigerating units. This manual provides comprehensive information on its installation, configuration, and operation, empowering users to maximize the performance and efficiency of their refrigeration systems.

The XR60CX is a compact and robust controller, designed for reliable performance in demanding refrigeration environments. It offers a wide range of features, including three relay outputs for controlling the compressor, fan, and defrost system, as well as three NTC or PTC probe inputs for temperature monitoring. The XR60CX’s advanced functionalities allow for precise temperature control, efficient defrost cycles, and reliable system operation.

This manual is intended for technicians and users familiar with refrigeration systems. It provides detailed instructions for installing, configuring, and operating the XR60CX, including explanations of its programming parameters, alarm signals, and technical specifications.

Quick Start Up

This section provides a step-by-step guide to get your Dixell XR60CX up and running quickly. This streamlined process ensures a smooth and efficient installation and commissioning experience. Follow these five simple steps to begin utilizing your new controller⁚

STEP 1⁚ Install the XR60CX

Mount the new Universal-XR controller according to the installation instructions provided. Ensure the controller is properly secured and accessible for future adjustments.

STEP 2⁚ Connect Probes

Connect the correct number of probes, based on your specific application needs. Refer to the table in Section 5 for recommended probe configurations.

STEP 3⁚ Connect Wiring

Connect the wiring for the compressor, fan, defrost system, and probes. Ensure all connections are secure and properly labeled.

STEP 4⁚ Power On

Turn on the power to the XR60CX. Within one minute of power-up, proceed to the next step.

STEP 5⁚ Probe Recognition

Press and hold the SET and DOWN keys for 3 seconds. The controller will automatically recognize and adjust itself to the type of probes connected, optimizing the system for optimal performance.

By following these five simple steps, you can quickly and easily install and configure your XR60CX controller, enabling you to monitor and control your refrigeration system efficiently.

General Description

The Dixell XR60CX is a versatile and reliable microprocessor-based controller designed for medium and low-temperature ventilated refrigeration applications. Its compact 32 x 74 mm format makes it suitable for a wide range of installations. This powerful controller features three relay outputs to control the compressor, fan, and defrost system, offering flexibility in managing your refrigeration system’s key components.

The XR60CX is equipped with three NTC or PTC probe inputs, providing comprehensive temperature monitoring and control. The first probe is for temperature control, the second is dedicated to monitoring the evaporator temperature for defrost termination control and fan management, and the third, optional, is used for connecting to the HOT KEY terminals to signal condenser temperature alarms or display a temperature. The controller can also incorporate a fourth temperature probe via its digital input, enhancing its temperature sensing capabilities.

The XR60CX is designed for easy configuration and control. It can be programmed using the HOT KEY programming keyboard, providing convenient access to its numerous parameters. The controller’s regulation is based on a differential from the set point, ensuring precise temperature control. The XR60CX offers a range of features, including defrost modes, fan control options, and alarm capabilities, making it a comprehensive and adaptable solution for modern refrigeration systems.

Safety Precautions

Before installing, operating, or performing any maintenance on the Dixell XR60CX controller, it is crucial to prioritize safety and adhere to the following precautions⁚

• Read the entire manual thoroughly before proceeding with any installation, operation, or maintenance tasks. Familiarize yourself with the controller’s functions, limitations, and safety guidelines.
• Ensure proper supply voltage before connecting the instrument. Verify that the supply voltage matches the controller’s specifications to avoid damage or malfunction.
• Avoid exposure to water or moisture. The controller is designed for indoor use only. Keep it away from water or damp environments to prevent damage or electrical hazards.
• Disconnect all electrical connections before performing any maintenance or repairs. This crucial step minimizes the risk of electric shock and ensures a safe working environment.
• Install the probe in an inaccessible location to prevent tampering or accidental damage by end users. The probe should be secured in a safe and protected area.
• Never open the instrument. The XR60CX is a sealed unit. Tampering with its internal components could result in damage, malfunction, or safety hazards.
• In case of failure or faulty operation, send the instrument back to the distributor or Dixell Srl (see address) with a detailed description of the fault. Avoid attempting repairs unless you are a qualified technician, as improper repairs can be dangerous.
• Respect the maximum current allowed for each relay. Refer to the Technical Data section for information on the maximum current ratings of each relay. Overloading relays can lead to damage or malfunctions.
• Separate and secure wiring for probes, loads, and power supply. Avoid crossing or intertwining wires to prevent short circuits or potential hazards.
• Consider the use of mains filters (mod. FT1) in parallel with inductive loads, especially in industrial environments, to reduce electrical noise and improve system stability.

By adhering to these safety precautions, you can ensure the safe and reliable operation of the Dixell XR60CX controller.

Main Functions

The Dixell XR60CX controller is designed to regulate temperature and manage essential components within refrigeration systems. Its primary functions include⁚

• Temperature Control⁚ The XR60CX monitors the temperature within the refrigerated space using a temperature probe. It compares the measured temperature to the set point and activates or deactivates the compressor to maintain the desired temperature.
• Defrost Management⁚ The controller supports two defrost modes⁚ electrical heater defrost (tdF EL) and hot gas defrost (tdF in). It manages the defrost cycle, including the interval between cycles (IdF), the maximum defrost duration (MdF), and the defrost termination temperature based on the evaporator probe readings.
• Fan Control⁚ The XR60CX provides various fan control modes, including⁚
  • FnC C_n⁚ Fans operate in parallel with the compressor and are off during defrost.
  • FnC o_n⁚ Fans run continuously, even when the compressor is off, and are off during defrost.
  • FnC C_Y⁚ Fans operate in parallel with the compressor and run during defrost.
  • FnC o_Y⁚ Fans run continuously, including during defrost.
• Fan Delay after Defrost⁚ The controller allows for a timed fan delay (Fnd) after defrost to allow for drip time before the fan restarts.
• Fan Stop Temperature⁚ The FSt parameter sets a temperature threshold above which the fans are always off, ensuring air circulation only when the evaporator temperature is below the set point.
• Cyclical Fan Activation⁚ The Fon and FoF parameters allow for cyclical fan activation even when the compressor is off, providing ventilation during off-cycle periods.
• Hot Key Functionality⁚ The XR60CX offers a Hot Key feature that enables connection to a ModBUS-RTU compatible network line using the external module XJ485-CX. This allows for monitoring and control of the controller through the Dixell X-WEB family of monitoring units.

These main functions of the XR60CX controller contribute to efficient and reliable refrigeration system operation.

Parameters

The Dixell XR60CX controller utilizes a comprehensive set of parameters to configure and fine-tune its operation. These parameters provide flexibility in adjusting various aspects of the refrigeration system, including temperature control, defrost cycles, fan behavior, and alarm settings. Here’s a brief overview of some key parameters⁚

• Set Point (CSET/FSET): This parameter defines the desired temperature for the refrigerated space. It can be adjusted to meet specific requirements for different applications.
• Differential (Hy)⁚ This parameter determines the temperature difference between the set point and the actual temperature at which the compressor will start or stop.
• Defrost Mode (tdF)⁚ This parameter selects between electrical heater defrost (tdF EL) and hot gas defrost (tdF in) based on the type of defrost system used.
• Defrost Interval (IdF)⁚ This parameter specifies the time interval between defrost cycles. It can be adjusted based on the expected frost accumulation rate.
• Maximum Defrost Duration (MdF)⁚ This parameter defines the maximum allowed duration for a single defrost cycle. It helps prevent excessive energy consumption or damage to the system.
• Defrost Termination Temperature (Fdt)⁚ This parameter sets the temperature threshold at which the defrost cycle will end, based on the evaporator probe readings.
• Fan Control Mode (FnC)⁚ This parameter determines the fan operation mode, selecting between parallel operation with the compressor (C_n, C_Y) or continuous operation (o_n, o_Y) with variations based on the compressor status and defrost cycle.
• Fan Delay after Defrost (Fnd)⁚ This parameter sets the time delay after a defrost cycle before the fans restart, allowing for drip time and preventing excessive fan operation.
• Fan Stop Temperature (FSt)⁚ This parameter defines a temperature threshold above which the fans will be turned off, preventing unnecessary air circulation when the evaporator temperature is higher than the set point.
• Differential for Forced Fan Activation (Fct)⁚ This parameter sets a temperature difference threshold between the evaporator and room probes, which triggers forced fan activation to prevent short cycles and ensure proper air circulation.
• Fan On Time (Fon)⁚ This parameter determines the duration for which the fans will run after the compressor stops, providing continuous ventilation even during off-cycle periods.
• Fan Off Time (FoF)⁚ This parameter specifies the duration for which the fans will remain off after the compressor stops, balancing ventilation with energy efficiency.

These parameters allow for detailed customization of the XR60CX controller’s operation to optimize performance based on specific refrigeration system requirements.

Controlling Loads

The Dixell XR60CX controller is designed to manage various loads within a refrigeration system, ensuring efficient and reliable operation. These loads typically include the compressor, fan, and defrost system, each with specific control mechanisms and functionalities. Let’s delve into how the controller manages these essential components⁚

• Compressor Control⁚ The XR60CX utilizes the temperature readings from the probes to control the compressor’s operation. The compressor is switched on when the temperature in the refrigerated space exceeds the set point plus the differential value. Conversely, the compressor is switched off when the temperature falls below the set point. This cycle ensures optimal temperature maintenance within the desired range.
• Fan Control⁚ The XR60CX offers various fan control modes, allowing for flexibility in regulating airflow within the refrigeration system. These modes include fan operation synchronized with the compressor (C_n, C_Y), continuous fan operation (o_n, o_Y), and fan activation based on temperature differentials (Fct). The specific mode selected depends on the application and the desired airflow characteristics.
• Defrost Control⁚ The XR60CX manages defrost cycles to prevent ice buildup on the evaporator, ensuring efficient heat transfer and maintaining optimal refrigeration performance. The controller triggers defrost cycles based on pre-programmed intervals (IdF) and duration (MdF), terminating the cycle when the evaporator temperature reaches the specified threshold (Fdt). The defrost method can be selected between electrical heater defrost (tdF EL) and hot gas defrost (tdF in), depending on the refrigeration system configuration.

By effectively controlling these loads, the XR60CX ensures reliable temperature management, efficient airflow, and optimal defrost operation, contributing to the overall performance and longevity of the refrigeration system.

Front Panel Commands

The front panel of the Dixell XR60CX controller provides a user-friendly interface for navigating and controlling various settings and functions. The panel features a clear display and a set of buttons that allow for easy interaction with the controller. Here’s a breakdown of the front panel commands and their functionalities⁚

• SET Button⁚ This button serves multiple purposes. In the standard mode, it displays the target set point. When in programming mode, it allows users to select a parameter or confirm a value.
• UP Button⁚ This button has two functionalities. In the standard mode, it displays the maximum stored temperature. In the programming mode, it browses through the parameter codes or increases the displayed value.
• DOWN Button⁚ Similar to the UP button, it has dual functionalities. In the standard mode, it displays the minimum stored temperature. In the programming mode, it browses through the parameter codes or decreases the displayed value.
• DEF Button⁚ This button initiates a manual defrost cycle when pressed for more than 2 seconds. This allows users to manually trigger a defrost process whenever necessary, overriding the automatic defrost schedule.
• ON/OFF Button⁚ This button controls the power to the controller. When pressed, it switches the controller on if it is currently off, and vice versa. However, the function of this button is dependent on the “onF” parameter, which determines whether the controller can be switched off manually.

By understanding the front panel commands and their functionalities, users can easily navigate the XR60CX controller, adjust settings, and manage the refrigeration system effectively.

Alarm Signals

The Dixell XR60CX controller incorporates a comprehensive alarm system to alert users to potential issues or malfunctions within the refrigeration system. These alarms provide timely notifications, allowing users to take corrective actions and prevent potential problems from escalating. The XR60CX utilizes both visual and audible alarm signals to ensure that critical events are promptly identified;

The controller’s display features a dedicated alarm indicator that illuminates when an alarm condition is detected. Additionally, an audible alarm signal sounds, further alerting users to the presence of an issue. The XR60CX provides a variety of alarm types, each representing a specific event or malfunction. These alarm types include⁚

• High Temperature Alarm⁚ This alarm is triggered when the monitored temperature exceeds a pre-set threshold, indicating a potential overheating issue.
• Low Temperature Alarm⁚ Conversely, this alarm indicates that the temperature has fallen below a pre-set threshold, suggesting a potential cooling issue.
• Compressor Fault Alarm⁚ This alarm alerts users to a malfunction in the compressor, potentially indicating a failure or a problem with the compressor’s operation.
• Probe Fault Alarm⁚ This alarm signals a problem with one or more temperature probes, indicating a possible sensor failure or a disconnection.
• Defrost Fault Alarm⁚ This alarm alerts users to a malfunction in the defrost system, indicating a possible issue with the defrost heater, hot gas line, or defrost control circuitry.
• Fan Fault Alarm⁚ This alarm signals a problem with one or more fans, indicating a potential fan failure or a blockage in the airflow.
• Door Open Alarm⁚ This alarm is triggered when a door in the refrigerated space is left open for an extended period, potentially leading to temperature fluctuations and energy waste.

By understanding the alarm signals and their corresponding events, users can quickly diagnose and address issues within the refrigeration system, ensuring optimal performance and minimizing downtime.