APC by Schneider Electric ACCU301 InRow DX 300mm Condensing Unit
Overview
The APC by Schneider Electric ACCU301 is a 300mm condensing unit designed for InRow DX precision cooling deployments in data centers and server rooms. Rated for 460–480V single-power operation and carrying UL certification, it pairs with compatible APC InRow DX indoor air handlers to deliver row-based cooling where traditional perimeter cooling falls short under high-density rack loads.
Row-based cooling places the thermal management close to the heat source — between or adjacent to active rack rows — rather than at the room perimeter. This approach reduces recirculation of hot air, improves PUE, and scales more predictably as rack densities increase. The ACCU301 serves as the outdoor refrigeration side of a split-system InRow DX configuration.
Key Features
- 460–480V Single-Power Input: Matches standard three-phase commercial electrical infrastructure common in raised-floor data centers and dedicated server rooms, simplifying electrical coordination with facilities teams.
- 300mm Form Factor: The narrow 300mm profile is engineered to align with APC's InRow DX cooling architecture, where rack-row footprint is constrained and every millimeter of floor space carries an equipment cost.
- UL Listed: UL certification confirms the unit has been tested to recognized safety standards — a requirement for most enterprise facilities teams and a prerequisite for many data center lease agreements and local building permits.
- InRow DX Split-System Architecture: Operating as the condensing (outdoor) half of a direct-expansion refrigeration loop, the ACCU301 handles heat rejection while the matched indoor unit manages airflow across hot aisles — keeping refrigerant lines short and system efficiency high.
Integration and Compatibility
The ACCU301 is designed to integrate within APC's InRow DX precision cooling ecosystem. Proper pairing with the correct APC indoor air handler unit is essential — consult APC InRow DX system documentation to confirm the matched indoor unit, refrigerant line sizing, and maximum line-set distance for your facility layout before ordering. This unit is not a standalone cooling device; it requires a compatible indoor APC InRow DX air handler and professional refrigeration commissioning.
Frequently Asked Questions
Q: What is the ACCU301 used for?
A: The ACCU301 is the condensing (outdoor) unit in an APC InRow DX split-system precision cooling configuration. It works in conjunction with a compatible APC InRow DX indoor air handler to provide row-based cooling in data center environments.
Q: What voltage does the ACCU301 require?
A: The ACCU301 operates on 460–480V single-power electrical supply.
Q: Is the ACCU301 UL listed?
A: Yes, the ACCU301 carries UL listing, confirming it has been evaluated to recognized electrical safety standards.
Q: Can the ACCU301 be used as a standalone cooling unit?
A: No. The ACCU301 is a condensing unit — the outdoor refrigeration component of a split-system. It requires a compatible APC InRow DX indoor air handler and professional refrigeration installation to function.
Q: What is the physical width of the ACCU301?
A: The ACCU301 is a 300mm form-factor condensing unit, sized for compatibility with APC's InRow DX row-based cooling architecture.
The ACCU301 is the field half of the equation that most data center planners underorder — the outdoor condensing unit. When you spec an APC InRow DX precision cooling system, the indoor air handler gets all the attention, but this 300mm condensing unit at 460–480V single-power is what actually rejects the heat load outside the building envelope. Get this unit wrong and the indoor handler has nowhere to dump its refrigerant energy.
Technical Highlights:
- 460–480V Single-Power Rating: Aligns with standard commercial three-phase distribution found in purpose-built data center facilities — avoids the cost and lead time of a step-down transformer that a 208V or 240V unit would require in many colo and enterprise environments.
- 300mm Form Factor: Designed to pair spatially and hydraulically with APC InRow DX indoor units — the 300mm width is not incidental; it governs refrigerant line routing, clearance requirements, and outdoor pad or rooftop placement planning.
- UL Listing: A hard requirement for facilities operating under NFPA 70 / NEC compliance, and typically required by AHJ sign-off before commissioning — confirms the unit passed standardized electrical safety evaluation.
Deployment Considerations:
- Confirm the matched indoor APC InRow DX air handler model before purchasing the ACCU301 — mismatched indoor/outdoor unit pairings can void system warranties and cause refrigeration circuit imbalance under load.
- Refrigerant line length, elevation change between indoor and outdoor units, and local ambient temperature range all affect system capacity — engage a licensed HVAC/R contractor and APC pre-sales engineering before finalizing placement for this unit.
The ACCU301 is the right spec for a new InRow DX split-system installation in an enterprise data center or colocation suite where three-phase 460–480V service is already provisioned and row-based precision cooling is the design intent — not a retrofit candidate for general HVAC replacements or non-APC InRow systems.
