DANGER• Connect power cords from devices in the rack cabinet to electrical outlets that are near the rackcabinet and are easily accessible.• Each rack cabinet might have more than one power cord. Be sure to disconnect all power cordsin the rack cabinet before you service any device in the rack cabinet.• Install an emergency-power-off switch if more than one power device (power distribution unit oruninterruptible power supply) is installed in the same rack cabinet.• Connect all devices that are installed in a rack cabinet to power devices that are installed in thesame rack cabinet. Do not connect a power cord from a device that is installed in one rackcabinet to a power device that is installed in a different rack cabinet.R004CAUTION:See the instructions in the rack documentation before you install devices, remove devices, or relocatethe rack.S038CAUTION:Eye protection should be worn for this procedure.Complete setup of Rear Door Heat eXchanger V2 that comes with therackSee this topic to learn how to complete setup of ThinkSystem Rear Door Heat eXchanger V2 when it comesalready installed to the rack.ProcedureStep 1. Remove the brackets that support the rear door heat exchanger.6 ThinkSystem Rear Door Heat eXchanger V2 User Guide