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CAREL μRack Controller
Intelligent refrigeration control for compact compressor racks, condensing units and transcritical CO₂ systems — featuring advanced compressor management, energy-saving control and convenient mobile commissioning.
Smarter Control for Compact Refrigeration Systems
The CAREL μRack is a compact electronic refrigeration controller designed for the management of condensing units and small compressor rack systems.
It combines compressor sequencing, suction pressure control, condenser fan management, system alarms and energy-saving functions in a versatile platform. With selected versions supporting NFC and Bluetooth Low Energy (BLE), setup and maintenance can be simplified using CAREL's APPLICA mobile application.
The range includes Basic, Medium and Advanced configurations for conventional refrigeration applications, plus a dedicated μRack CO₂ version for transcritical R744 refrigeration systems.
Compressors
Up to 6 on Standard versions, configuration dependent
Condenser Fans
Up to 4 ON/OFF or inverter-controlled fans
Connectivity
Wireless configuration on supported models
R744 Control
Specialised transcritical refrigerant pressure control
Choose Your CAREL μRack Series
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Key Features & Benefits
Compressor Management
Supports compatible ON/OFF, inverter-driven and Digital Scroll compressors, depending on controller version.
Fan Speed & Staging
Common condensing-stage management with up to four fans and modulation options.
Energy Optimisation
Floating suction and condensing control strategies help adapt system operation to changing conditions.
Compressor Protection
Oil recovery, operating-limit prevention, discharge temperature and low-superheat protection functions.
Mobile Commissioning
CAREL APPLICA app enables convenient parameter configuration and commissioning on compatible devices.
System Supervision
Two RS485 serial ports for Fieldbus and BMS connectivity, including Modbus RTU communication.
μRack CO₂ – Compact Transcritical Control
The CAREL μRack CO₂ controller is developed specifically for compact transcritical R744 refrigeration systems. It supports the management of high-pressure and receiver-pressure functions required in CO₂ operation.
High-pressure valve management for gas cooler pressure optimisation.
Flash-gas valve control for liquid receiver pressure management.
Single-stage heat reclaim for supported hot-water and heating applications.
CO₂-specific features apply to the dedicated μRack CO₂ hardware and its supported configuration.
Available μRack Model Range
Expand the categories below to view the CAREL manufacturer's model codes. Confirm current availability before ordering.
Basic – Panel Mounted
| Part Number | Connectivity | Display |
|---|---|---|
| U20R00MRK0280 | NFC | Built-in |
| U20R00MRK0380 | NFC + BLE | Built-in |
Medium – DIN Rail
| Part Number | Connectivity | Display |
|---|---|---|
| U20R00MRK0290 | NFC | Built-in |
| U20R00MRK0390 | NFC + BLE | Built-in |
Advanced – DIN Rail / Integrated SSR
U20R00MRK0300 – Advanced version, no built-in display, integrated SSR, supports ON/OFF, inverter and Digital Scroll compressor management.
To be combined with a suitable external display.
CO₂ – Transcritical R744
U00000MRT0400 – Dedicated μRack CO₂ controller, DIN rail mounting, no built-in display, for transcritical CO₂ applications.
To be combined with a suitable external display and application-specific valve control equipment.
Related Accessories
The CAREL μRack system can be paired with selected accessories according to the controller and refrigeration application.
| Part Number | Description |
|---|---|
| AX2000PD20030 | External user display with NFC + BLE |
| ACS00CB000020 | Display connection cable, 1.5 m |
| ACS00CB000010 | Display connection cable, 3 m |
| UCHCONP010 | Panel-model connector and cable kit |
| UCHCOND010 | Medium/Advanced DIN-rail connector and cable kit |
| UARCOND010 | CO₂ DIN-rail connector and cable kit |
Accessories are listed for reference; inclusion with individual products is not assumed.
Typical Applications
Compact Controller. Smarter Refrigeration.
Looking for CAREL μRack controllers in Malaysia? Contact RNA Engineering & Trading Sdn Bhd for enquiries, availability and assistance with choosing the appropriate controller for your condensing unit or refrigeration rack.
Inquiry - CAREL μRack Compressor Rack Controller
