Vertiv | Liebert PEX4 | User Manual 75
General Maintenance
4.4. Water Leak Detector
Connect water leak detectors and through the controller conrm the alarm information. The detector should be
located away from any drainage discharge on the oor, 2 m to 2.5 m away from the unit. Do not place it directly
under the unit. Figure 4-1 shows the recommended location for the water leak detection sensor.
No. Description No. Description
1 Location of water detection sensor 3 Drain pipes on the ground
2 Location of the water detection sensor
Figure 4-1 Recommended Location for the Water Detection Sensor
• Before fastening the connection of any mechanical parts or cables, ensure that the power supply of the
control unit has been disconnected.
• Do not use the water detection sensor adjacent to ammable liquid or use it to detect ammable liquid.
4.5. Air Filter
The eiciency of the air lter in the unit is 30%, which complies with US ASHRAE52-76 and Eurovent 4/5
standards, and the dust resistance value is 90% (EU4 standard). To ensure the normal operation of the lter,
the lter service alarm logic is provided by the controller. The default fan running time is 2000 hours when the
time is exceeded, the lter service alarm is triggered. The user needs to replace the lter based on the clogging
condition of the lter. The lter must be checked once a month, and be replaced as required during operation.
• Cut the power supply before replacing the lter.
• Clear the fan running time to ‘0’ after replacing the lter.
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