6.3.4 Leak Checking for Unit and Field-installed Fluid Piping 59
6.3.5 Condensate-pump Drain Line Requirements 60
6.3.6 Condensate-pump Drain Piping for300-mm(12-in.) Models 61
6.3.7 Field-installed, Gravity-fed Drain Line Requirements 67
7 Electrical Connections 73
7.1 Power-supply Cable-connection Guidelines 73
7.2 Wiring Connections 73
7.3 Electrical Field-connection Descriptions 74
7.3.1 Locating the Serial Tag andRemovingtheElectricalPanelon600-mm (24-in.)Units 74
7.3.2 Cable-entry Points on 600-mm (24-in.) Units 76
7.3.3 Protective Features of Electrical Heaters—600-mm (24-in.) Units 77
7.3.4 Accessing the Electrical Panel on300-mm(12-in.) Units 77
7.3.5 Releasing the Electric-panel Lock 78
7.4 Protective Features of the Electronically-commutated (EC) Fans—All Models 79
8 Humidifier—600-mm (24-in.) Units Only 81
8.1 Principal of Operation 81
8.2 Connecting Water Supply to the Humidifier 82
8.3 Humidifier Start-up and Operation 82
8.3.1 Low Water Conductivity 83
8.4 Humidifier Canister Replacement 84
8.4.1 Removing the Old Canister 84
8.4.2 Mandatory Cleaning of the Drain Valve 85
8.4.3 Installing the New Canister 86
8.5 Humidifier Maintenance during Extended Shutdown 87
8.5.1 Humidifier Troubleshooting 87
8.5.2 Humidifier Troubleshooting Steps 89
9 Liebert iCOM Hardware Installation 91
9.1 Installing Wired Remote Sensors 91
9.1.1 Setting DIP switches and labeling 2T sensors 91
9.1.2 Terminating the last sensor on the CANbus link 94
9.1.3 Routing CANbus cable and preparing for sensor installation 95
9.1.4 Installing 2T sensors in the racks to monitor 100
9.1.5 Connecting the CANbus cable and ground 103
9.2 U2U Network Installation 105
9.2.1 Required network equipment 105
9.2.2 Plan wiring runs 105
9.2.3 U2U Wiring connection 105
9.2.4 Wiring Cooling Units without Wall-mount Displays 106
9.2.5 Wiring Cooling Units with Wall-mount Displays 108
10 Start-up 111
10.1 Checks to Perform after Start-up 112
10.2 Automatic Restart 112
Vertiv | Liebert CRV Installer/User Guide | 4
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