Topic guide
Explore references on reliability, availability and redundant architectures. Review failure models, maintenance arrangements and system dependencies while keeping the evidence, methods and scope of each publication in view.
193–216 / 255
Open Compute Project Foundation 2026
For a new site, write the POI LVRT/HVRT envelope and the PFAPR requirement (90% within 2 s) as design criteria, and settle which voltage measurement (line-to-neutral or line-to-line) governs during protection coordination with the utility.
Open Compute Project Foundation 2024
Reserve space for tap-off valves, pipe paths with straight runs, valve and fitting replacement, drainage and condensation collection in the original design.
ASHRAE TC 9.9 2016
Encode the A1-A4 table (dry bulb, dew point, altitude derate) as the canonical envelope lookup; site max inlet = classMax - (altitude-900)/derateStep.
Schneider Electric 2011
Default the commissioning budget to about 2% of capex.
Open Compute Project Foundation 2026
Check that the facility's AC feed (480, 415 or 400 V, single or dual) and the rack power range match the planned IT block, including up to 1.1 MW per sidecar and the parallel option.
Schneider Electric 2025
Use the eight challenges as a DLC readiness checklist in the commissioning and design-review module.
TÜV NORD 2026
In an 'EN 50600' standards profile, offer separate availability-class selectors for power, cooling and cabling (instead of a single Tier), plus a protection-class selector per room or zone
TÜV NORD Year not stated
Point to this paper only as an orientation resource for newcomers to the EN 50600 family; do not derive calculation rules from it.
Uptime Institute Journal 2021
Do not display legacy availability percentages such as 99.671/99.741/99.982/99.995 as Tier properties
FEMA 2007
For site selection, look beyond the 100-year flood to the 500-year (0.2%) flood and the facility's occupancy category, and avoid flood hazard areas where possible.
FEMA 2014
At critical-facility data centers, place generators, ATS, fuel tanks and pumps above the greatest of BFE + 3 ft, DFE + 1 ft and 500-year elevation + 1 ft, and prefer elevation to dry floodproofing.
Siemens (with Jensen Hughes) 2025
Structure the fire module by room type: white space, UPS/battery room, lithium-ion BESS, generator, electrical rooms.
ASHRAE TC 9.9 2009
If an air-side economiser meets an urban or industrial site, prompt for corrosion coupon monitoring (G1 target) and MERV 11/13 makeup-air filtration.
Schneider Electric 2015
Build a novice criticality wizard (C1-C4) and map defaults to it: fuel autonomy 0/24/72/96 h, utility feeds 1/1/2/2, fire rating 0/0/1/2 h.
Vertiv 2022
Add to the UPS catalog an efficiency curve per mode (VFI/VI/VFD) at 25/50/75/100% load and a transferTimeMs per mode.
Open Compute Project Foundation 2023
Compare vendor offers on the same template: request W32 footprint density (kW/m2), full-solution static floor load, ceiling clearance and non-IT power per kW of IT in writing.
Schneider Electric 2018
Run a generator check: estimate leading kVAr from the IT kW on the non-UPS or bypass path and the PSU load percentage.
ABB 2014
Add "single-conversion / industrial (VI)" to the UPS topology picker for hyperscale sites with a strong grid, showing efficiency (>99%) beside reduced conditioning.
Open Compute Project Foundation 2022
Run a probability-and-impact leak risk analysis at project start, specify BSPP/O-ring joints for serviceable connections and check the O-ring compound against the coolant chemistry using the full wetted-materials list.
Schneider Electric 2011
Default to aspirating detection for rooms above 15 ACH and spot photoelectric otherwise; compute detector count as floor area divided by the area per detector for the ACH band.
Open Compute Project Foundation 2025
When sizing TCS capacity against electrical capacity, state the cold-plate capture fraction (70-80%) and target delta-T (10 or 20 C) explicitly, and use the roughly doubled delivery at 20 C (4,845 versus 2,422 kW) as design headroom.
ABB 2026
For loads above roughly 30-50 MW add a grid-code compliance checklist (LVRT duration, frequency band, RoCoF, PF) and let users choose LV-UPS versus MV-UPS architecture.
NIST / SEMATECH 2012
Make independence and capacity assumptions required inputs of every reliability calculation and keep input provenance.
Open Compute Project Foundation 2020
Compare the bill of materials of a server to be immersed (cable jackets, heat-shrink, EPDM capacitors, CMOS battery, relays, thermal paste) against the paper's problem table and obtain a compatibility statement from the fluid supplier for each item.
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