The nVent Schroff LHX+ is an in-rack air-to-water heat exchanger that mounts directly to Varistar CP cabinets, creating a sealed cooling loop that never exchanges air with the room. Cold air is delivered through a front plenum into the rack-mounted equipment, and warm exhaust air returns through a rear plenum to the heat exchanger — strict separation prevents recirculation. This closed-loop design is built for environments where room-level air conditioning is impractical or where electronics must be isolated from ambient conditions: edge data centers, physics labs, medical research facilities, and industrial control rooms.

How does the LHX+ maintain ±0.1 °C stability?

Four internal air temperature sensors monitor cabinet conditions while differential pressure sensors track airflow. The LHX+ Control Unit — a separate 2U rack-mount module — uses this data to modulate a motorized coolant valve, adjusting water flow through the heat exchanger in real time to hold the chilled air temperature to within ±0.1 °C peak-to-peak. An optional Water Control Package Kit adds supply and return-side coolant pressure, temperature, and flow sensors, enabling control strategies based on return temperature or ΔT rather than just supply air temperature.

What redundancy provisions keep the cooling running during maintenance?

All active components are hot-swappable: fans, power supplies, the controller itself, and the motorized control valve can be replaced without shutting down the rack or interrupting coolant flow. Dual redundant power supply units are available. The 7-inch touch screen on the cabinet door provides local monitoring and configuration without opening the enclosure, while Ethernet connectivity — supporting SNMP, Modbus TCP, EtherCAT, EtherNet/IP, and Profibus — feeds cooling system status to the facility's building management or data center infrastructure management system.