Loop flushing, chemical cleaning, passivation, fluid charging, filtration, and cleanliness verification — preparing D2C and TCS loops for commissioning and startup.
Air cooling reaches its limit at approximately 30kW per rack. AI and machine learning workloads routinely demand 80–120kW — requiring direct-to-chip liquid cooling that places cooling infrastructure inches from heat-generating components.
These loops demand cleanliness, chemical treatment, and fluid-quality precision that standard mechanical commissioning scopes often overlook. A contaminated or improperly charged loop risks cold-plate fouling, pump damage, and warranty voids before the first server powers on.
The processes that bring direct-to-chip and technology-cooling loops to a commissioning-ready state — self-performed and documented.
High-velocity flushing to remove construction debris, welding slag, and fabrication oils. Cleanliness verified to project-specified particulate and turbidity endpoints. See flushing capabilities →
Engineered chemical cleaning to dissolve and suspend residues. Stainless-steel passivation to support the protective chromium oxide layer. See chemical cleaning →
Final fill and charging with project-specified fluid — glycol, corrosion inhibitors, biocides, or other chemistry — to establish initial closed-loop water conditions defined by the specification.
Staged filtration and cleanliness verification against project acceptance criteria — including particle counts, turbidity, and water chemistry — documented for Cx review and turnover.
Common failure modes that differentiate a disciplined loop-readiness program from a standard mechanical flush.
Incorrectly sized distribution piping creates hot spots. Server inlet temperatures vary based on distance from the CDU, requiring calculated velocity and pressure drop analysis.
Welding slag, thread debris, and fabrication oils migrate into server manifolds if flushing is inadequate. Server manufacturers void warranties for particulate-related failures.
Isolating a single rack without proper flow path consideration can starve downstream equipment or create dead-leg conditions.
Centrifugal pumps are sensitive to debris and dry-running. Proper strainer maintenance and pump suction conditions are critical to avoid premature bearing and seal failure.
Every scope includes documented readiness for Cx authority review — within Javelin's defined scope of loop flushing, chemical cleaning, passivation, and fluid charging.
Complete pre-functional checklist aligned with ASHRAE Guideline 0 and project-specific Cx requirements.
Coordinated flushing sequence with main loop and server manifold cleaning to 5-micron specification.
Complete turnover documentation including O&M manuals, as-built drawings, and commissioning support.
From loop flushing and chemical cleaning to passivation and fluid charging — tell us what your direct-to-chip or TCS loops need and we'll build the readiness plan.
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