Vertiv SR2N03020PAA2 3-Rack 20kW Row Cooling System with Fire Suppression

The Vertiv SR2N03020PAA2 is a pre-configured, three-rack row-cooling solution rated for 20kW total IT load — with integrated fire suppression (FSS cabinet) and six 30A PDUs built in. It ships as a matched set of three 42U x 600mm x 1400mm racks arranged in a 3,300mm row footprint, each carrying a 6.6kW cooling capacity allocation managed by a 20kW PMC (Power and Cooling Manager) distribution system. If you're deploying a dense edge or mid-size data room and need power, cooling, and fire protection in a single pre-validated assembly, the SR2N03020PAA2 collapses what would otherwise be a multi-vendor integration project into a single purchase order.

Overview

Row-cooling architectures keep cool air at the source — between or alongside the racks — rather than flooding a room and hoping for the best. The SR2N03020PAA2 uses this approach within a self-contained three-rack enclosure row, combining Vertiv's SR2 rack infrastructure with an integrated fire suppression system that sets it apart from the base PAA1 variant. The result is a solution appropriate for environments where an AHJ (authority having jurisdiction) or internal policy requires fire suppression inside the cabinet row — think co-location pods, secure server rooms, or edge deployments in facilities without overhead suppression coverage.

The system sits within the broader data center cooling infrastructure category and is sized to serve moderate-density server or network equipment loads without requiring raised floors or precision air conditioning room units.

Key Features

• 20kW Total IT Load Capacity via 20kW PMC: The 20kW Power and Cooling Manager governs distribution across the three-rack row. At real-world server densities of 4–7kW per rack, this ceiling comfortably handles two fully loaded racks with headroom on the third — giving you expansion room without immediately maxing the system.
• 6.6kW Per-Rack Cooling Allocation: Each of the three 42U racks receives up to 6.6kW of cooling capacity. That's enough for a mix of 1U servers, ToR switches, and storage nodes at typical mid-density loads. If you're running GPU or high-density compute above that threshold, look at a higher-capacity variant or a four-rack configuration.
• Integrated Fire Suppression System (FSS): The PAA2 designation means this unit ships with the FSS cabinet included — a meaningful distinction from the PAA1 series. Deploying suppression at the row level eliminates the need for a separate overhead suppression zone, which can simplify permitting in edge and branch deployments where room-level suppression isn't already in place.
• Six 30A PDUs: Six PDUs at 30A each provide two PDUs per rack — sufficient for dual-corded servers with standard 20A C13/C19 load profiles. Primary and redundant feeds per rack are covered without adding external PDU infrastructure.
• Single Cooling Unit: One cooling unit handles the full row. This keeps the physical footprint compact at 3,300mm total row length. Note: the FAA2 variant in the same family steps up to two cooling units for N+1 redundancy — if uptime SLAs require cooling redundancy, that's the right trade-up within the Vertiv SR2 line.
• 42U x 600mm x 1400mm Rack Form Factor: Standard 600mm-wide, 1400mm-deep 42U racks accommodate the vast majority of 1U/2U server platforms and network equipment. The 1400mm depth handles even deep 1U pizza-box servers and dual-post cable management without cramping.
• 3,300mm Row Length: The total assembled row footprint is 3,300mm — approximately 10 feet 10 inches. Plan for this during floor layout; the FSS cabinet adds length versus the PAA1 (2,700mm), so verify floor plate dimensions before ordering.

Integration and Compatibility

The SR2N03020PAA2 integrates with Vertiv's broader power distribution and monitoring ecosystem. The 20kW PMC distribution type is consistent across the SR2 20kW family, meaning the monitoring and management interfaces used on other SR2 deployments carry over. For teams already running Vertiv Trellis or Avocent infrastructure management, the PMC can feed into those platforms without a separate integration layer.

Physical compatibility follows standard EIA-310 rack mounting. Any equipment that fits a standard 42U 600mm-wide rack — servers, patch panels, KVM switches, UPS modules — installs normally. The FSS cabinet is factory-integrated, not field-added, so no on-site plumbing or suppression agent connections are required beyond standard commissioning.

When comparing to rack enclosure alternatives, keep in mind that row-cooling configurations require adequate return air path planning. Perforated blanking panels and proper cable management remain the integrator's responsibility at installation.

When This Is the Correct Choice

Deploy the SR2N03020PAA2 when: (1) your IT load fits within 20kW across three racks, (2) local code or policy requires fire suppression at the row or cabinet level, and (3) you want a factory-matched, single-vendor assembly rather than integrating rack, cooling, PDUs, and suppression separately. It's particularly well-suited to edge data rooms in regulated environments — healthcare, finance, government — where fire suppression compliance is non-negotiable and a dedicated raised-floor room isn't available.

When to Choose a Different Model

If fire suppression is not required, the SR2N03020PAA1 delivers the same 20kW / 3-rack / 6 PDU configuration in a 2,700mm footprint and likely at lower cost — that's the correct choice when the FSS isn't mandated. If cooling redundancy is a requirement (N+1 cooling), step up to the SR2N03020FAA2, which adds a second cooling unit at 3,600mm total length. For larger IT loads across more racks, the SR2N04020PAA2 (4-rack, 20kW) or SR2N05020PAA2 (5-rack, 20kW) distribute that same 20kW ceiling across more enclosures at lower per-rack density.

Frequently Asked Questions

Q: What is the difference between the SR2N03020PAA2 and the SR2N03020PAA1?

A: The PAA2 suffix indicates the unit includes an integrated fire suppression system (FSS cabinet). The PAA1 has identical rack count (3), power capacity (20kW), PDU count (6), and cooling unit count (1), but does not include fire suppression and has a shorter total row length of 2,700mm versus 3,300mm for the PAA2.

Q: Does the SR2N03020PAA2 include cooling redundancy?

A: No. The SR2N03020PAA2 ships with one cooling unit. If N+1 cooling redundancy is required, the SR2N03020FAA2 includes two cooling units in a 3,600mm row footprint — that is the correct upgrade path within the SR2 family.

Q: What is the total row length of the SR2N03020PAA2 once assembled?

A: The assembled row length is 3,300mm (approximately 10 feet 10 inches). This is longer than the equivalent PAA1 configuration (2,700mm) due to the addition of the FSS cabinet. Verify available floor space before ordering.

Q: How many PDUs are included and what is their rating?

A: Six 30A PDUs are included — two per rack. This supports dual-corded server configurations without requiring additional external PDU procurement.

Q: What IT load can each rack in the SR2N03020PAA2 handle?

A: Each of the three 42U racks is allocated 6.6kW of cooling capacity under the 20kW PMC system. Equipment loads above 6.6kW per rack will exceed the per-enclosure cooling envelope and require a higher-density solution.

Q: Is the fire suppression system factory-integrated or field-installed?

A: The FSS cabinet is factory-integrated into the SR2N03020PAA2 assembly. It is not a field-add kit. Standard commissioning is required at installation, but no on-site suppression agent plumbing or separate integration is needed.

Jerry Tildsen

The SR2N03020PAA2 is one of the more complete pre-validated assemblies in the Vertiv SR2 line — specifically because it combines the 20kW PMC distribution tier with factory-integrated fire suppression in a three-rack row. Most projects I see either bolt suppression on as an afterthought or skip it entirely and rely on room-level coverage. This unit removes that decision from the field entirely, which matters in regulated environments where the AHJ wants documented suppression at the enclosure level, not just the room.

Technical Highlights:

• 6.6kW Per-Rack Cooling Envelope: At 6.6kW per rack, the system handles two fully dense racks and leaves the third with meaningful headroom. Running three racks at full 6.6kW each hits the 20kW ceiling exactly — plan load distribution accordingly.
• Six 30A PDUs (Two Per Rack): Two 30A PDUs per rack gives you primary and redundant feed capability for dual-corded servers without sourcing external PDUs. This is often where project costs get padded unnecessarily — it's included here.
• 3,300mm Assembled Row Length: The FSS cabinet adds 600mm versus the PAA1 (2,700mm to 3,300mm). That's real floor space — factor it into hot-aisle/cold-aisle layout before you pour concrete or commit to a floor plate.

Deployment Considerations:

• Single cooling unit means no in-row cooling redundancy. If your SLA requires cooling N+1, the FAA2 variant is the correct specification — same rack count and PDU count, second cooling unit, 3,600mm total length.
• The FSS system is factory-integrated, not field-retrofittable from a PAA1. Do not plan to upgrade suppression post-installation — specify the PAA2 from the start if suppression is required.

This configuration is the right pick for a regulated edge data room — a branch office server room, a healthcare facility IDF closet, or a financial services edge pod — where local AHJ or internal policy mandates cabinet-level fire suppression and the IT load stays within the 20kW / 6.6kW-per-rack envelope.