OCP TCS row-manifold pre-commissioning guideline: flush end-point at the loop outlet, as conductivity and turbidity
≤60 µS/cm (or within 10–20 µS/cm of procedure water); <5 NTUrecommendation
| Value kind | recommendation — Recommendations are design guidance, not measured facts; validate them against the project boundary conditions. |
|---|---|
| Scope | Applies to cleaning row-manifold pipework before it connects to liquid-cooled racks and CDUs. The outlet is released when its conductivity is within 10–20 µS/cm of the procedure water (itself at most 50 µS/cm) or at most 60 µS/cm, and turbidity is reliably below 5 NTU. It is not a release limit for coolant entering cold plates, and it is not the limit on the water used to flush: OCP's PG25 guideline (Rev 2.0, 2026-09-15) sets that input water at below 25 µS/cm and 1 NTU. The approved fluid supplier and the OEM set the cold-plate and working-fluid criteria. |
| Caveat | A pipework pre-commissioning end-point, not a cold-plate or working-coolant release limit. |
| As of | 2025-03 |
| Source | OCP, Guidelines for Pre-Commission Preparation of Technology Cooling System (TCS) Row Manifolds in Liquid Cooled Data Centers, v1.0 (2025-03-17) · §4.4 and §4.4.1(3); Table 5 (procedure water) |
| Review | checking…review by 2027-04-16 · standard cadence |
| Recorded changes | last 2026-10-16 |
| Claim id | ocp-tcs-precommission-flush-endpoint |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.