The Johnson Controls Sabroe Unisab III (Part Number 4214-001 / 4209-001) is a state-of-the-art universal controller and display unit specifically engineered for the management of industrial refrigeration compressors. Acting as the “brain” of the compressor unit, the Unisab III provides a sophisticated interface for monitoring and controlling both screw and reciprocating compressors. It is designed to optimize energy efficiency, extend equipment life through proactive protection algorithms, and provide seamless integration into plant-wide SCADA or building management systems. This specific display unit provides operators with real-time graphical data, alarm history, and precise setpoint adjustment capabilities.
Product Specifications (Datasheet)
Dimensions: 220 mm x 165 mm x 60 mm Weight: 1.2 kg Country of Origin: Denmark Supply Voltage: 24V AC/DC Display Type: Backlit Monochrome LCD with graphical capability Communication Ports: RS-485 (Modbus RTU), Ethernet (Modbus TCP), CAN bus Digital Inputs: 8 Configurable inputs Analog Inputs: 6 (PT1000 / 4-20mA) Operating Temperature: -10°C to +55°C Protection Rating: IP65 (Front panel mounted)
Application Fields
The JOHNSON CONTROLS SABROE UNISAB III is a standard in global industrial cooling, used in:
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Cold Storage & Logistics: Managing large-scale ammonia refrigeration racks for food preservation.
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Marine Refrigeration: Controlling cargo cooling and air conditioning systems on transport vessels.
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Food & Beverage: Precise temperature control for breweries, dairies, and meat processing plants.
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Chemical & Pharmaceutical: Maintaining strict climate conditions for volatile chemical storage.
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District Cooling: Integrating multiple compressor units into a centralized urban cooling network.
Product Instructions
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Installation: Mount the display unit into a standardized rectangular cutout on the compressor control cabinet door. Use the provided gasket and clamps to ensure an IP65 watertight seal.
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Powering Up: Connect the 24V supply to terminals 1 and 2. The unit will undergo a self-diagnostic boot sequence lasting approximately 30 seconds.
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Interface Navigation: Use the tactile membrane buttons to navigate the menu. The “Home” screen displays suction pressure, discharge pressure, and oil temperature by default.
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Alarm Management: In the event of a fault, the red LED will illuminate. Access the “Alarm List” to view the timestamped error code and the specific sensor value that triggered the shutdown.
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Network Integration: Assign a unique ID for Modbus communication via the “Communication Settings” menu to allow the unit to be monitored remotely by a central PLC.
Q&A – Frequently Asked Questions
Q: Can the Unisab III be used with non-Sabroe compressors? A: Yes, while optimized for Sabroe hardware, the “Universal” nature of the Unisab III allows it to be configured for a wide variety of industrial compressors from other manufacturers.
Q: What is the difference between part number 4214-001 and 4209-001? A: Generally, 4214-001 refers to the complete controller assembly, while 4209-001 often refers to the front display/membrane panel. They are typically used together as a matched set for the Unisab III interface.
Q: Does this unit support remote monitoring via a web browser? A: Yes, when connected to a LAN via the Ethernet port, the Unisab III can be accessed through its internal web server for remote status viewing and data logging.
Q: How do I backup the configuration settings? A: Settings can be exported to a connected PC using the Unisab configuration tool or saved to an internal memory chip for transfer to a replacement unit.
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