CDU-300LL3S · CDU-600LL3S · CDU-300LL3D · CDU-600LL3D

Row-level CDU

The row-level CDU is a large centralized cooling unit installed side-by-side with server cabinets. 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 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.

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Features & technical specifications1 specification table

Product features

Dual power supply backup
High-efficiency variable-frequency single pump or dual pump optional
Anti-condensation control
Optional 50μm ultra-fine filtration unit
Automatic liquid replenishment system
Online maintenance
Intelligent group control
Corrosion-resistant stainless steel piping
Intelligent monitoring system
Online water quality monitoring
10%–100% adjustable flow rate
Overpressure protection
Low energy consumption design
Leakage detection function
10-inch color display screen

CDU internal equipment arrangement and heat-exchange circuit.

Row-level CDU model specifications
MODEL	CDU-300LL3S	CDU-600LL3S	CDU-300LL3D	CDU-600LL3D
Rated heat exchange capacity (kW)	300	600	300	600
Unit rated flow rate (L/min)	470	860	470	860
Pump type	Single pump	Single pump	Dual pump	Dual pump
Primary supply/return water temperature (°C)	35/45	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	Softened water, PG25 aqueous solution, EG25 aqueous solution
Secondary supply/return water temperature (°C)	40/50	40/50	40/50	40/50
Secondary working fluid	PG25 aqueous solution, EG25 aqueous solution	PG25 aqueous solution, EG25 aqueous solution	PG25 aqueous solution, EG25 aqueous solution	PG25 aqueous solution, EG25 aqueous solution
Dimensions W × D × H (mm)	60012002200	60014002200	60012002200	90014002200
Power supply specifications	2-way 3Ph AC380-415V 50Hz	2-way 3Ph AC380-415V 50Hz	2-way 3Ph AC380-415V 50Hz	2-way 3Ph AC380-415V 50Hz
Dual power input (optional)	Mains / UPS / Diesel generator power supply	Mains / UPS / Diesel generator power supply	Mains / UPS / Diesel generator power supply	Mains / UPS / Diesel generator power supply
Storage environment temperature and humidity	-45 ~ 85℃; long-term 5%~85% non-condensing, short-term 5%~95% non-condensing	-45 ~ 85℃; long-term 5%~85% non-condensing, short-term 5%~95% non-condensing	-45 ~ 85℃; long-term 5%~85% non-condensing, short-term 5%~95% non-condensing	-45 ~ 85℃; long-term 5%~85% non-condensing, short-term 5%~95% non-condensing
Altitude	3000m (above 3000m, derated; for every 200m increase in altitude, ambient temperature rating decreases by 1.5℃)	3000m (above 3000m, derated; for every 200m increase in altitude, ambient temperature rating decreases by 1.5℃)	3000m (above 3000m, derated; for every 200m increase in altitude, ambient temperature rating decreases by 1.5℃)	3000m (above 3000m, derated; for every 200m increase in altitude, ambient temperature rating decreases by 1.5℃)

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

Reference conditions & selection notes

The source states that the above ratings are based on pure water as the working medium. Confirm cooling capacity and fluid requirements with technical personnel; the matrix also lists glycol options.
Storage humidity values are non-condensing. Above 3000 m, the ambient temperature rating decreases by 1.5°C for each additional 200 m.

Liquid Cooling Manual, pp. 1–2