Versatile Split Refrigeration Controller with RTC AR2-28 Series

Overview

The AR2-28 Series is a highly versatile split refrigeration controller equipped with a real-time clock (RTC), specifically designed for applications that demand precise temperature control and efficient defrost management. This controller is ideal for use in a wide range of refrigeration systems, ensuring reliable and energy-efficient operation in various settings.

Applications

The AR2-28 Series is suitable for a variety of refrigeration applications, including:

• Plug-in cabinets
• Supermarket display cases
• Cold stores
• Control panels
• Upright fridges and freezers
• Refrigerated tables
• Any application where real-time defrost is essential

Key Features

Defrost Management

The AR2-28 Series supports up to six real-time defrost cycles. It features synchronized defrost start and termination through a master-slave connection, ensuring efficient defrosting and optimal system performance.

Input Options

This controller offers selectable input options between NTC10K or PTC sensors, providing flexibility and compatibility with various temperature monitoring systems.

Energy Efficiency

The AR2-28 Series incorporates the FLEXICOLD function, enabling energy savings or the use of an alternative setpoint, thereby reducing energy consumption without compromising performance.

Advanced Control Capabilities

The controller provides optional control for a second compressor or evaporator, along with excellent evaporator fan control, making it suitable for more complex refrigeration systems.

Alarm Systems

Equipped with a comprehensive alarm system, the AR2-28 Series includes absolute or relative temperature alarms, door open alarms, and condenser high temperature/pressure alarms to ensure safety and reliability.

Additional Controls

The controller features light and standby control (On/Off) and is capable of connecting to LAE supervisory systems for enhanced monitoring and management.

Display Options

The AR2-28 Series is compatible with the LCD-5S or RU33 display units, offering clear and intuitive user interfaces.

Technical Specifications

Temperature Range and Precision

• Temperature Range: -50 to 120°C, -55 to 240°F
• Resolution: 0.1 / 1°C or °F
• Precision:

• NTC10K: ±0.3°C (within -40.0 to 70.0°C)

• PTC1000: ±0.5°C (within -50 to 120°C)

Power Supply

• Operating Voltage: 230V~ ±10%, 50-60Hz
• Power Consumption: 3W

Ambient Temperature

• Operating Range: -10 to 50°C

Display Units

• LCD-5S Display Unit:

• Dimensions: 169 x 38 x 25 mm (WxHxD)

• Panel Cut-Out: 163 x 31.5 mm (WxH)

• Protection: IP55

• Ambient Temperature: -10 to 50°C

• RU33 Display Unit:

• Dimensions: 77 x 35 x 20 mm (WxHxD)

• Panel Cut-Out: 71 x 29 mm (WxH)

• Protection: IP55

• Ambient Temperature: -10 to 50°C

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