Rittal Liquid Cooling Unit LCU CW, model SK 3313610, 500 W input power, steel housing, black

Rittal Liquid Cooling Unit LCU CW, model SK 3313610, is a compact liquid cooling unit designed for cabinets and enclosures where precise thermal management is required. The unit combines an air/water heat exchanger, DC fans and an integrated controller in a steel black housing. It is intended for installation at the 482.6 mm (19") mounting level in network or server racks, drawing heated air from the rear third of the rack, cooling it via the heat exchanger and directing cooled air to the front section to stabilise inlet temperatures.

Advantages

The LCU CW provides efficient heat dissipation for heat-critical electrical enclosures and server racks with an input power rating of 500 W and a wide input voltage range (90–264 V, 50/60 Hz). Its steel housing offers mechanical robustness and a compact form factor for space-saving installation. Dynamic, continuous control of cold water volume flow and energy-efficient DC fans help maintain precise temperature control while optimising energy use. Fan modules can be replaced during operation, reducing downtime for maintenance.

Suitable for

• Industrial control cabinets with concentrated heat sources
• Server racks and network cabinets in data closets or small server rooms
• Electrical enclosures requiring controlled inlet temperature for sensitive components
• Applications where front-directed cooled airflow is needed to protect equipment

When it may not be suitable

This unit is designed to be integrated into 19" racks or comparable enclosures and may not be appropriate for free-standing or non-rack-mounted installations without compatible mounting provisions. Although the product lists a maximum cooling capacity figure, actual performance depends on installation conditions, water supply temperature and flow; sites without adequate chilled water supply or plumbing arrangements may not achieve the expected cooling effect.

Key specifications

• Cooling method: air/water heat exchanger with integrated fans and controller
• Rated input power: 500 W
• Input voltage: 90–264 V, 50/60 Hz
• Housing material and finish: steel, black
• Mounting level: suitable for 482.6 mm (19") rack installation
• Replaceable fan modules during operation
• Dynamic continuous control of cold water volume flow

How to use

Install the LCU CW at the 482.6 mm (19") mounting level in the rack according to the enclosure manufacturer’s mounting guidelines. Connect the unit to the building supply within the specified voltage range and ensure the chilled water supply is plumbed to the heat exchanger with appropriate valves and fittings. Configure the integrated controller to the required inlet temperature setpoint and verify that airflow paths in the rack match the intended rear-to-front cooling concept. Carry out commissioning checks including leak tests on the water connections, electrical safety checks, and functional tests of fan operation and controller response.

What to consider before purchase

• Confirm rack compatibility and available 19" mounting space at the specified installation level
• Verify chilled water supply temperature, flow rate and plumbing connections at the installation site
• Check electrical supply meets the 90–264 V, 50/60 Hz requirement and provision for safe connection
• Assess required cooling capacity in the specific enclosure environment rather than relying solely on maximum figures

Usage recommendations

For reliable operation, use the LCU CW with a stable chilled water supply and maintain clear airflow paths in the rack. Schedule preventive maintenance to inspect water connections and replace fan modules as needed; replaceable fans allow maintenance without full system shutdown. Adjust controller setpoints to achieve the manufacturer-recommended inlet temperature for installed equipment.