User manual

User Menu Parameters
121 Liebert
®
iCOM
®
Configuring Low Noise Operation
First, determine the days and time of day low noise is required. This will be set U806 through U808
respectively. Second, determine the maximum fan speed setting during low noise operation.
In this example, the user does not want fan speed to exceed 35% max speed from 10 pm to 8 am
weekdays.
1. Set U805 Mon-Fri columns to yes.
2. Set U806 inverval time from 22:00 to 8:00
3. U807 = 0% / 100%
4. U818 = 35% (Max fan speed low noise)
5. U819 = 100% (Max fan speed during normal operation)
The settings above result in a 35% maximum speed when the timer is active (i.e., at night) and will
operate the fan between 0 and 100% maximum speed of when the timer is inactive (normal operation,
during daytime).