Vertiv
™
| Liebert® XDO | User Manual
24
• Prior to tightening any assembly connections and cabling/wiring connections, ensure that the power
supply of the control unit is turned off.
• It is forbidden to use the water leak detection sensor near flammable liquids.
• It is prohibited to use the water leak detection sensor to detect flammable liquids.
• External general alarm terminals
The external general alarm can be connected to the 75# and 76# terminals, and its output is used to connect external alarm
devices, such as alarm lights. When a major alarm occurs, the contact is closed. This can be used to send out remote alarms,
signal the building management system or automatically dial the paging system. The user needs to provide the power
supply of the external public alarm system circuit.
For other terminal definitions, see
Circuit Diagram of Vertiv
™
Liebert® XDO Appendix I
.
3.4. Electrical Inspection Checklist
After the electrical installation is completed, check and confirm according to
.
Table 3-2 Electrical Installation Checklist
Check Items
Results
The power supply voltage is the same as the rated voltage on the unit nameplate.
There is no open circuit or short circuit in the electrical circuit of the system.
The power supply cabling and ground cabling to the disconnect switch have been properly
connected.
The rated value of the circuit breaker or fuse is correct (please refer to the current value in
to select a suitable circuit breaker or fuse)
The control cabling is firmly connected.
All cables and circuit connectors have been rigidly tightened, and the tightening screws are not
loose.
After confirming the above points, user can start the commissioning.
Users are prohibited from powering on the unit before the professional and technical personnel
authorized from Vertiv have checked and confirmed the electrical connections.
