A large centralized cooling unit installed separately in the air-conditioned room.<\/p>","protected":false},"menu_order":2,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_kadence_starter_templates_imported_post":false,"cxdb_product":{"schema_version":1,"group":"liquid","model":"CDU-900LF3S\/D \u00b7 CDU-1200LF3S\/D \u00b7 CDU-1800LF3S\/D","overview":"Room-level CDU is a large centralized cooling unit installed separately in the air-conditioned room. It mainly consists of a cabinet, plate heat exchanger, secondary-side circulating water pump, constant-pressure liquid replenishment system, expansion tank, filters, valves, sensors, control system, display screen and power supply module. Through heat exchange via the plate heat exchanger, cooled liquid is sent to the heat source to absorb heat, and the heat-carrying liquid then re-enters the plate heat exchanger for heat exchange treatment, forming a circulating heat exchange process.","working_principle":"","features":["Year-round free cooling capability, subject to the cold-source and operating conditions.","Redundant key components; anti-condensation; circulating-pump and valve self-holding; dual power supply with uninterrupted switching; liquid leakage detection.","Differential-pressure, flow-rate, cold-standby, hot-standby, standalone, group-control, local and remote modes; multiple units can network automatically for group management.","Supports mixed CPU and GPU cold-plate liquid cooling and optional standard functional modules.","Stepless regulation over a wide cooling-capacity and differential-pressure adjustment range.","Optional inlet\/outlet pipe directions, filtration grades and communication protocols.","High-head, large-flow functionality suitable for large ring networks.","Internal layout for maintenance access and online automatic liquid replenishment.","Sanitary-grade piping with high-precision filtration.","RS485 serial and RJ45 Ethernet ports; Modbus, TCP and UDP protocols."],"applications":["High-density data centers","Retrofit and new-build data centers","Intelligent computing centers","Large-scale computer rooms","AI training clusters","High-power industrial equipment cooling","Scientific research laboratories"],"notes":["Verify ratings for the selected coolant and operating conditions. Storage humidity is non-condensing; altitude derating applies above 3000 m at 1.5\u00b0C per additional 200 m."],"source":"Liquid Cooling Manual, p. 3","image":{"id":655,"alt":"Room-level CDU"},"diagrams":[],"tables":[{"title":"Room-level CDU model specifications","rows":[["MODEL","CDU-900LF3S\/D","CDU-1200LF3S\/D","CDU-1800LF3S\/D"],["Rated heat exchange capacity (kW)","900","1200","1800"],["Unit rated flow rate (L\/min)","1330","1720","2400"],["Pump type","Single pump \/ Dual pump","Single pump \/ Dual pump","Single pump \/ Dual pump"],["Primary supply\/return fluid temperature (\u00b0C)","35\/45","35\/45","35\/45"],["Primary working fluid","Softened water, PG25 aqueous solution, EG25 aqueous solution","Softened water, PG25 aqueous solution, EG25 aqueous solution","Softened water, PG25 aqueous solution, EG25 aqueous solution"],["Secondary supply\/return fluid temperature (\u00b0C)","40\/50","40\/50","40\/50"],["Secondary working fluid","Softened water, PG25 aqueous solution, EG25 aqueous solution","Softened water, PG25 aqueous solution, EG25 aqueous solution","Softened water, PG25 aqueous solution, EG25 aqueous solution"],["Dimensions W \u00d7 D \u00d7 H (mm)","950x1500x2200","1200x1800x2200","1200x2000x2200"],["Power supply specifications","Power supply: 2-way 3Ph AC380-415V 50Hz","Power supply: 2-way 3Ph AC380-415V 50Hz","Power supply: 2-way 3Ph AC380-415V 50Hz"],["Dual power input (optional)","Supported power sources: Mains \/ UPS \/ Diesel generator","Supported power sources: Mains \/ UPS \/ Diesel generator","Supported power sources: Mains \/ UPS \/ Diesel generator"],["Storage environment temperature and humidity","Storage environment temperature and humidity: -45~85\u2103; 5%~85% RH non-condensing (long-term), 5%~95% RH non-condensing (short-term)","Storage environment temperature and humidity: -45~85\u2103; 5%~85% RH non-condensing (long-term), 5%~95% RH non-condensing (short-term)","Storage environment temperature and humidity: -45~85\u2103; 5%~85% RH non-condensing (long-term), 5%~95% RH non-condensing (short-term)"],["Altitude","Altitude: 3000m (derated above 3000m; ambient temperature rating decreases by1.5\u2103 for every 200m increase in altitude)","Altitude: 3000m (derated above 3000m; ambient temperature rating decreases by1.5\u2103 for every 200m increase in altitude)","Altitude: 3000m (derated above 3000m; ambient temperature rating decreases by1.5\u2103 for every 200m increase in altitude)"]]}]}},"class_list":["post-625","cxdb_product","type-cxdb_product","status-publish","hentry"],"acf":[],"yoast_head":"\n