Danfoss

Pack Controller AK-PC 782-B

Name: Pack Controller AK-PC 782-B
Brand: Danfoss

The AK-PC 782B is a flexible and high-performance controller tailored for transcritical CO₂ booster systems.

Danfoss

Company profile

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01 Overview

Designed for efficiency and precision, it supports advanced regulation of up to 22 compressors and 8 fans, with step or speed control for both. With features like floating condenser pressure, heat recovery, oil management, and load shedding, the AK-PC 782B optimizes energy use while ensuring reliable operation. Its adaptability extends to diverse configurations, with support for 220 I/O connections and 11 extension modules. Connectivity is seamless, with interfaces including RJ11 (CAN), Ethernet IP RJ45, USB-B, and RS232, making it easy to integrate into modern systems. Additional tools like AK-ST 500 enhance programming and monitoring capabilities. From precise capacity control to energy-saving functions like night setback and P0 optimization, the AK-PC 782B is engineered to deliver top-tier performance and efficiency for refrigeration professionals worldwide.

The AK-PC 782B is a powerful and versatile controller designed for advanced pack control in transcritical CO₂ booster systems. Its precision regulation, efficiency optimization, and user-friendly design make it a dependable choice for managing refrigeration systems across varying climates and pack sizes.

Key Features

Comprehensive Control
The AK-PC 782B supports up to 22 compressors and 8 fans, offering step or speed control for both. It supports up to 220 controls points, with capacity control based on pressure and fan operation regulated via PI control. This adaptability ensures optimal system performance in diverse configurations.
Advanced Functionality
Equipped with specialized features like floating condenser pressure, oil management, load shedding, heat recovery, and pump control, the AK-PC 782B is engineered for maximum efficiency and system reliability. Additional support for P0 optimization and night setback further enhances energy savings.

Connectivity and Communication
The controller is built to integrate seamlessly with modern systems:

Multiple Interfaces
Includes RJ11 (CAN) to display, RS232, USB-B to PC, and Ethernet IP RJ45 connections.
External Communication
Easily interfaces with external systems using AK-ST 500 programming tools.

Technical Highlights

Versatility
Manages up to 6 safety signals, 5 additional analog inputs, and 10 alarm inputs. Expansion modules can extend functionality further, supporting up to 220 I/O connections.
Power Efficiency
Operates on 24 V AC or DC with minimal power consumption (8 VA).
Global Compatibility
Available in multiple languages and compliant with CE, cURus, and other global standards.

Applications

The AK-PC 782B excels in controlling transcritical CO₂ booster packs, providing precise capacity management and enhanced energy efficiency. Its robust oil management system and flexibility in handling compressors, fans, and auxiliary components make it ideal for challenging refrigeration applications.

This controller’s adaptability and reliability make it a trusted solution for professionals seeking to optimize refrigeration pack control in demanding environments.

Learn more about Danfoss’ CO₂ product portfolio here

02 Technical dossier

Specifications

15 data points · as published by Danfoss

Refrigerant: CO₂
Category: Components

01Operating limits

2 entries

Metrics controlled (temperature, pressure): Temperature, Pressure, and capacity control (via PI control mode)
Operating temperature range: Not specified, but typically these devices operate in standard commercial refrigeration ranges, approximately -20 °C to +60 °C.

02Refrigerant

3 entries

Refrigerants applied to: CO₂ (Transcritical and Booster applications)
Sensor: ppm range of gas detected: Not specified, but typically these devices operate in standard commercial refrigeration ranges, approximately -20 °C to +60 °C.
Refrigerant: CO₂

03Components & options

1 entry

Valves controlled: Yes, Three-way valve control is mentioned

04Controls & electrical

7 entries

Remote monitoring: Yes, via communication types (Ethernet IP RJ45, RS232, USB-B to PC)
Proprietary or open architecture: Likely open architecture (supports multiple communication types like Ethernet, RS232, and USB, indicating flexibility)
Variable-speed control: Yes, supported for compressor and fan capacity control
Automatic fault detection: Yes, includes automatic fault detection with alarm inputs and diagnostics
Communication type: RJ11 (CAN) to Display, RS232, USB-B to PC, Ethernet IP RJ45
Power consumption: 8 VA
Type of sensor: Not specified directly, but the system may use various sensors like temperature and pressure sensors for control functions.