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Support / Technical answers
Direct, data-backed answers to the questions that matter before and during deployment.
A CDU connects and separates the IT secondary loop and facility primary loop, transfers heat and stabilizes coolant supply through pumps, filtration, air management, sensing and controls.
Selection should consider duty, flow and head, supply-return temperatures, pressure drop, redundancy, controls, water quality and service space together.
A CDU is not merely a box with pumps; it manages heat, pressure, flow and water-quality boundaries between facility and IT loops. Liquid-to-liquid units isolate loops through a heat exchanger, while liquid-to-air units reject heat to room air and impose different facility requirements.
Calculate duty from load and supply-return temperatures, then establish pump operating points from cold-plate, connector, manifold, filter and piping pressure drop. Define redundancy, filtration, expansion and refill, venting, sensing, communications, dew-point control and service clearance together.
Factory tests should cover design and off-design points. Site commissioning should include flushing, filling, venting, sensor calibration, pump changeover, interlocks and loaded operation. Nameplate capacity does not replace validation on the actual system curve.