The Facility Distribution Unit (FDU) defines a new category of high-capacity Coolant Distribution Units, engineered not for individual rack rows but for complete data halls/facility installations in hyper-scale data centers, efficiently cooling large-scale, high-density AI server racks. FDU offers a heat transfer capacity of 5 MW at an approach temperature of approximately 4°C, with a flow rate of 376 m3/h (secondary side TCS). Advanced features include a highly available N+1 redundant pump system of 4 pumps, condensation-free control, automatic coolant leveling, leak detection, and remote monitoring of essential parameters. Designed for high-performance computing (HPC) and GPU-intensive clusters, the FDU utilizes ASHRAE W3/ W4 warm water to meet the stringent cooling needs of hyperscale environments.
DCX FDU 5MW AT4
The most powerful CDU in the world.
Capacity
Up to 5 MW thermal capacity in a single unit, designed for scalable deployment in modular AI and HPC environments.
Performance
High-efficiency heat transfer with optimized flow distribution, ensuring stable operation under extreme compute loads.
Sustainability
Engineered for warm-water cooling (ASHRAE W3/W4), enabling heat reuse and significant reduction of facility energy consumption.
Power density
Supports next-generation AI racks exceeding 100 kW+, with architecture ready for continuous density scaling.
Overview
Facility Distribution Unit (FDU) is a centralized coolant distribution unit used in direct liquid cooling systems for large-scale server clusters, including GPU-intensive environments. FDU integrates the entire pumping system, heat exchangers, fluid conditioning module, and operational sensors into a single unit. Importantly, all of these components are located outside the white space. Instead of deploying ad hoc CDU units inside IT racks, the system designer has access to one centralized distribution node, from which only two main loops: supply and return, are routed and then branched locally. One key advantage is the complete separation of circuits, the coolant on the facility water side (FWS) never mixes with the server loop. Coolant integrity is ensured by an integrated fluid conditioning system that includes filtration, air and particle separation, and conductivity control. Moreover, FDU pumps deliver twice the pressure head of standard CDU units, enabling a reliable supply over longer pipe runs without compromising performance. The compact dimensions of FDU (L 3m/9.8ft | W 1.5m/4.9ft | H 2m/6.5ft) deliver unmatched capacity per square meter, ideal for space-constrained facilities.
Features
- N+1 redundant pump system with 4 industrial pumps, delivering up to 10,000 L/min and ensuring uninterrupted operation.
- Condensation-free control maintaining coolant temperature above dew point for stable performance.
- Integrated water treatment system preserving coolant quality without efficiency loss.
- Dual-loop architecture reduces TCS pressure and protects IT equipment.
- Automatic coolant leveling, leak detection, and fully remote monitoring of system parameters.
Features
- Redundant PLC control with dual-path logic and real-time HMI monitoring.
- Continuous 24/7 system visibility with intuitive LCD interface.
- Customizable high-capacity heat exchanger with modular plate design.
- Integrated coolant conditioning ensuring maximum thermal efficiency.
- Eliminates performance losses associated with glycol-based fluids (e.g. PG25).
- Scalable architecture supporting rapid increases in rack power density.
- Future-proof design aligned with evolving AI workload requirements.
System Build
Facility Distribution Unit
This large-scale, facility-sized Coolant Distribution unit is 3 meters long, 1,5 meters wide, and 2 meters tall. This facility-scale FDU redefines cooling architecture by replacing multiple distributed CDUs, pumps, and heat exchangers with a single centralized, high-capacity unit. Designed as a 5 MW modular building block, it enables scalable infrastructure expansion in phased increments (e.g., 10, 15 MW), aligned with actual AI workload growth. The FDU serves as the central node of the thermal system, bridging the chilled water source with downstream distribution networks supplying manifolds and server-level cold plates. Its architecture supports both N+1 and 2N redundancy schemes, ensuring Tier III readiness and simplified certification processes. By eliminating localized CDUs, the system delivers extended hydraulic reach, higher capacity, and full operational visibility through integration with the facility management layer.
Fast, flexible and upgradeable configuration of pumps and plate heat exchanger capacity. From 2, 4, 5MW per single unit up to 8-10MW in dual stack configuration.
Dual loop CDU system – provides reduced pressure to TCS (secondary loop) for ITE equipment.
Adaptive flow management – supplying flexible coolant temperature to ITE.
Fully remote temperature monitoring of set point and ambient temperatures, flow, pressure and operation with full condensation control and reporting service.
Redundant pump system – Wilo industrial centrifugal pumps with automatic failover and built-in resiliency
Built-in water treatment station to keep high purity and quality of cooling medium without PG25 performance drop.
Compact build of L 3m/9.8ft | W 1.5m/4.9ft | H 2m/6.5ft.
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Get your custom solution:
We need basic information to design custom liquid cooling system:
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Quantity and general specification and dimensions of servers, ICT systems or other to be cooled components, along with power allocation per device or rack.
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Brief overview of your project along with your main objective: better performance, water savings, energy efficiency, heat reuse, higher density?
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Preferred liquid cooling technology: direct chip – coldplate system or immersion solution? Planned heat rejection or heat recovery strategy.
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Country & city nearby planed location for climate data, heat transfer performance & shipping cost estimate.