Simplify High-Density Liquid Cooling Without Facility Chilled Water

As AI, machine learning, and high-performance computing (HPC) continue to push server rack densities beyond the capabilities of traditional air cooling, data centers are rapidly adopting liquid cooling to manage increasing thermal loads. However, many facilities lack access to chilled water infrastructure, making conventional coolant distribution units (CDUs) expensive or impractical to deploy.

The Vertiv™ CoolPhase CDU solves this challenge by combining refrigerant-based cooling and liquid distribution into a single, integrated system. Unlike traditional CDUs that rely on a building's chilled water supply, the CoolPhase CDU uses Pumped Refrigerant Economization (PRE) technology to reject heat directly to compatible outdoor condensers, eliminating the need for facility chilled water while providing efficient cooling for direct-to-chip and rear door heat exchanger applications.

Purpose-built for AI factories, GPU clusters, enterprise data centers, colocation facilities, and edge computing environments, the Vertiv CoolPhase CDU delivers scalable liquid cooling with simplified deployment, exceptional energy efficiency, and enterprise-class reliability.

Why Choose the Vertiv CoolPhase CDU?

Deploy Liquid Cooling Without Chilled Water Infrastructure

Many existing data centers were never designed for liquid cooling. Installing a traditional chilled water system can require significant facility upgrades, increased costs, and extended deployment timelines.

The Vertiv CoolPhase CDU eliminates these barriers by using a refrigerant-to-liquid cooling architecture that connects directly to compatible outdoor condensers instead of a facility chilled water loop. This allows organizations to adopt liquid cooling faster while reducing installation complexity and capital expenses.

Ideal Applications

• Artificial Intelligence (AI) Infrastructure
• GPU Server Clusters
• High-Performance Computing (HPC)
• Enterprise Data Centers
• Colocation Facilities
• Cloud Service Providers
• Research Laboratories
• Government Computing Facilities
• Edge Data Centers

Key Benefits

Vertiv CoolPhase CDU Features

Refrigerant-to-Liquid Cooling Architecture

Unlike conventional CDUs that depend on chilled water, the Vertiv CoolPhase CDU uses refrigerant technology to transfer heat directly from the secondary liquid loop to an outdoor condenser.

Benefits include:

• No chilled water infrastructure
• Simplified facility integration
• Reduced installation costs
• Faster deployment

Pumped Refrigerant Economization (PRE)

Vertiv's Pumped Refrigerant Economization technology combines efficient refrigerant heat transfer with liquid cooling performance.

PRE technology provides:

• High cooling efficiency
• Reduced energy usage
• Simplified system design
• Reliable heat rejection

Direct-to-Chip and Rear Door Heat Exchanger Support

The CoolPhase CDU is compatible with today's leading liquid cooling technologies, including:

• Direct-to-chip cooling
• Rear door heat exchangers (RDHx)
• High-density liquid-cooled servers
• AI accelerator platforms
• GPU clusters

Variable-Speed Pump Options

Available with 10 HP or 15 HP variable-speed pumps, the system automatically adjusts coolant flow to match changing IT loads.

Benefits include:

• Improved efficiency
• Reduced energy consumption
• Precise coolant delivery
• Lower operating costs

Advanced Filtration

Integrated filtration options help maintain coolant quality and protect sensitive liquid cooling components.

Available filter ratings include:

• 50 Micron
• 100 Micron
• 500 Micron

Intelligent Controls and Monitoring

The Vertiv CoolPhase CDU provides integrated monitoring and system controls for simplified operation.

Features include:

• Real-time performance monitoring
• System alarms
• Pump control
• Teamwork operation
• Remote communications
• Dual power management

These capabilities help data center operators proactively monitor cooling performance and quickly respond to changing operating conditions.

Service-Friendly Design

Maintenance is simplified through:

• Front service access
• Top service access
• Easy component accessibility
• Standard Liebert equipment footprint

This minimizes service time while reducing disruption to critical operations.

Technical Specifications

Cooling Performance

• Maximum Cooling Capacity (Water): 362 kW
• Maximum Cooling Capacity (25% Propylene Glycol): 348 kW
• Heat Rejection Technology: Pumped Refrigerant Economization (PRE)
• Refrigerant: R410A

Pump Options

• 10 HP Variable-Speed Pump
• 15 HP Variable-Speed Pump
• Maximum Flow Rate: Up to 200 GPM
• Available Head Pressure: Up to 45 PSI

Cooling Applications

• Direct-to-Chip Cooling
• Rear Door Heat Exchanger (RDHx)
• High-Density AI Servers
• GPU Servers
• HPC Infrastructure

Fluid Compatibility

• Water
• 25% Propylene Glycol

Filtration

• 50 Micron
• 100 Micron
• 500 Micron

Controls

• Integrated Intelligent Controls
• Teamwork Mode
• Independent Module Operation
• Dual Power Feed
• Remote Monitoring Support

Physical Features

• Front Service Access
• Top Service Access
• Standard Liebert DSE Footprint
• Compatible with Liebert® MCV High-Density Condensers

Technical Specifications

*Max Capacity at 83 ºF CWS, 95 ºF ODT.
**Available head pressure out of the unit with 50µ filter.

Electrical Specifications

Remote Monitoring and Control

Compatibility Data

Cooling Capacity (kW)

Future-Ready Cooling for AI Infrastructure

As AI and high-density computing continue to reshape the data center, cooling infrastructure must evolve to keep pace. The Vertiv™ CoolPhase CDU offers a practical, efficient path to liquid cooling by eliminating the need for facility chilled water while delivering the performance required for modern AI, GPU, and HPC workloads.

Whether you're retrofitting an existing facility or designing a next-generation AI deployment, the Vertiv CoolPhase CDU provides the flexibility, efficiency, and reliability needed to support tomorrow's computing demands.