APC InRow RD (Uniflair InRow Direct Expansion)

Row-mounted direct-expansion cooling spanning three refrigerant generations under one nameplate

APC InRow RD (Uniflair InRow Direct Expansion) is one of 4 CRAC and CRAH units tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

Room and in-row air cooling runs out of headroom as rack density rises; above roughly 40 kW per cabinet the load is picked up by liquid cooling, usually retrofitted into halls that keep their CRAC units for the remaining air-cooled rows. The catalogue entries closest to that decision are CoolIT Systems DCLC Direct Liquid Cooling and ZutaCore HyperCool Two-Phase Immersion.

Schneider Electric APC InRow RD (ACRD) direct-expansion cooling specs, refrigerant GWP transition dates, and used-market pricing for data center buyers.

Schneider Electric's InRow RD is a direct-expansion (DX) in-row cooler that slots into a 300mm or 600mm gap between server racks, sold historically under the APC brand and marketed today as Uniflair InRow Direct Expansion. The letter prefix in the model code, not the trailing number, decides whether a compressor is even present: ACRD is this DX line, ACRC is a same-numbering chilled-water sibling with no compressor at all, and ACRP is a third family that mixes DX (100/101/102) and chilled-water (500/501/502) models under one prefix. That confusion is not hypothetical. The line spans three refrigerant generations under one nameplate family: R-407C on the older ACRD500/501/502 reciprocating platform, R-410A across the bulk of the resale population (ACRD100/101/200/201/301/600/601/602), and R-32 only on the current ACRD101S and ACRD101P. Schneider's own transition schedule closes new R-410A orders on May 31, 2026 and requires installation by December 31, 2026 — one day ahead of the EPA's January 1, 2027 GWP-700 deadline for computer-room air conditioning.

Why it matters

The model code determines refrigerant exposure and EPA compliance timing: three DX generations (R-407C, R-410A, R-32) carry different GWP profiles and different windows for legal new installation. Misreading the ACR-prefix as interchangeable risks buying a chilled-water ACRC or mixed-medium ACRP unit by mistake, or budgeting service refrigerant against the wrong regulatory clock entirely.

Who buys it

Data center and colocation operators retrofitting hot-aisle/cold-aisle rows with supplemental spot cooling, edge and telecom site operators needing cabinet-level DX cooling, and used-equipment buyers sourcing decommissioned ACRD units for row-based capacity augmentation in raised-floor or slab environments already running aisle containment.

Role in the data center

Supplemental row-based DX cooling deployed within a hot-aisle/cold-aisle containment scheme to add localized high-density capacity, not a room-level primary cooling replacement.

Key specifications

Technical summary

Capacity, 300mm legacy chassis: up to 10 kW Capacity, 600mm legacy chassis: up to 42 kW Capacity, current-gen R32 (ACRD101S/P): 0.5-11.0 kW Refrigerant: R-410A (300/600mm legacy), R-407C (500-series), R-32 (current-gen) Refrigerant GWP: R-410A 2,088 / R-407C 1,774 / R-32 675 Equipment refrigerant charge: 1.6 kg (3.5 lb), 300mm chassis Voltage: 200-240V / 3-phase (ACRD600 class) Weight: 367-413 kg (808-911 lb), 600mm chassis Minimum service clearance: 900mm front/rear, 760mm side Efficiency, current-gen: SCOP 3.0 Standards: CE / UL (current-gen)

Configurations and options

Base (S-suffix) vs. humidified/reheat (P-suffix) variants; air-cooled (ambient outdoor condenser) vs. fluid-cooled (building condenser-water/glycol loop) condenser options on the 200/201 chassis; 300mm vs. 600mm chassis width.

Compatibility and dependencies

Even the largest InRow RD chassis (ACRD600 series) tops out at up to 42 kW, roughly 12 tons — a fraction of the 12-30-ton perimeter CRAC units in the broader category, so a single in-row unit is never a tonnage-matched substitute for a perimeter unit; matching room capacity means deploying several units in an array. It is a split system requiring a matched outdoor condensing unit (e.g. ACCU100 on the R32 platform) within a 46 m (150 ft) maximum equivalent refrigerant-line length, and its short close-coupled air path is designed around hot/cold aisle containment rather than open-room delivery.

Pricing and availability

Published price range: $1,300 to $27,649 across 7 observations (used to new/reseller list). Comparable secondary-market band: 1500–3500 $ per unit. Trend: flat Warranty, new: One-year factory warranty covering parts, labor and travel; excludes loss of refrigerant, consumables and preventive maintenance items, per the OEM O&M manual.. Warranty, used: 30-day return window observed on both eBay used-unit listings (a marketplace return policy, not a manufacturer functional warranty)..

Lifecycle and maintenance

Schneider's own dates for ACRD301S, part of this same family, show end of commercialization October 15, 2026 and end of standard service October 15, 2036 — a ten-year support tail. New units carry a one-year factory warranty on parts, labor and travel, explicitly excluding loss of refrigerant and preventive maintenance items. Refrigerant charge runs 3.5 to 24 lb across the family, well under the 50 lb full-charge threshold that triggers EPA's mandatory leak-repair-rate rule, so that specific mandate does not bind on a single unit.

Thermal and emissions profile

Three refrigerant generations exist under one nameplate family. R-407C (GWP 1,774) runs the older ACRD500/501/502 reciprocating platform; R-410A (GWP 2,088) covers the bulk of the resale population (ACRD100/101/200/201/301/600/601/602); R-32 (GWP 675) is confirmed only on the current ACRD101S and ACRD101P, the sole variant already below EPA's 700 GWP ceiling taking effect for computer-room air conditioning on January 1, 2027. Existing R-410A and R-407C units remain legal to operate, relocate and service indefinitely — only new manufacture and new installation are restricted.

Common failure points

• Compressor (reciprocating, 500-series) — Frequent short-cycling or failure to reach setpoint despite fans running normally
• Compressor (scroll, R410A 300/600mm) — High discharge-temperature alarm or locked-rotor trip on restart after a period idle
• Refrigerant circuit / brazed joints — Repeated low-charge alarms shortly after a recharge
• EC/VFD fan assembly — Airflow-proving alarm trips, or unit runs unusually loud or imbalanced
• Control board / network management card — Unit will not report into a current building management system or NMC web interface
• Condensate pump / drain pan — Water-detection alarm trips, or visible residue and scale in the drain pan
• Humidifier / reheat module (P-suffix units only) — Humidity setpoint drift or the reheat coil fails to energize on demand

Inspection checklist

Confirm nameplate refrigerant against the physical unit — legacy 300mm/600mm chassis carry R410A while the 500-series (ACRD500/501/502) carries R407C, and the model number alone does not reveal which. Pull total logged compressor and fan run-hours from the unit's own controller display — the InRow RD controller tracks run time independently per major component and a reset after a swap erases that history. Verify refrigerant charge against OEM nameplate — 1.6 kg (3.5 lb) equipment charge on the 300mm chassis, rising to 2.2-10.93 kg once a matched outdoor condenser is included. Pressure-test the circuit and hold for a documented period before rigging — an unrecorded reading at pickup leaves no baseline to prove a later leak occurred in transit rather than at the seller's dock. Confirm the matched condensing unit (e.g. ACCU100 on the R32 platform) ships with the indoor cabinet — InRow RD is a split system and a seller may offer the indoor evaporator alone. Check filter condition against the 18-week factory-default replacement interval — confirm stock availability of part number 875-2013 before assuming a drop-in replacement exists for an older chassis. Inspect compressor oil condition and type — spec calls for POE oil at a minimum 32 cSt viscosity at 40°C, and unknown oil history on a used unit risks compressor damage on restart. Verify electrical nameplate MCA/MOP against the destination panel — figures range from 25A/40A on a 300mm single-phase chassis to 78.6A/110A on a 600mm three-phase humidified unit and are not interchangeable. Confirm minimum service clearance is achievable at the destination site — 900 mm (36 in) front/rear and 760 mm (30 in) side per the OEM manual, required for filter and compressor access. Measure the planned refrigerant line run against the 46 m (150 ft) maximum equivalent-length rating — do not assume an existing outdoor condenser location will work without checking it. Confirm compressor type and, on the 500-series, VFD drive response across its full 30-85 Hz range — an out-of-range fault code signals a degraded or miscalibrated drive. Check control-board firmware revision and network management card generation — an older board may not integrate with a current building management system without a documented upgrade path. Request the unit's last documented startup or commissioning report — a first-startup superheat and subcooling reading is the only reliable baseline against which today's readings can be compared. Confirm whether the unit is the legacy R410A platform or the current R32 platform before budgeting service refrigerant — R410A remains legal to service indefinitely but sits inside an economy-wide HFC production cap tightening toward 30% of baseline by 2029. Confirm EPA Section 608 refrigerant recovery was performed by a certified technician at deinstallation, with a signed recovery record — required regardless of the roughly 3.5-24 lb charge size sitting under the 50 lb mandatory-repair-trigger threshold.

Procurement channels

New/reseller-list stock through IT hardware resellers (Connection, SabrePC, Gruber Power Services, compsource.com); used/decommissioned units through eBay.

Regional notes

Voltage variants observed (200-240V single-phase, 200-240V/460-480V/380-415V three-phase) map to US and international grid standards; pricing observations were US-dollar-denominated reseller and marketplace listings only.