Liebert 100-1000A user manual Manual Transfer / Preferred Source Selection, Source transfer screen

Operating Instructions for the Touch Screen Interface

10.2Manual Transfer / Preferred Source Selection

The Source Transfer option (Source Xfers) in the touch screen menu allows you to select a preferred source. Transfers are only permitted when the voltage and current are within their proper operating range and the sources are synchronized on units without Optimized Transfer. Units with the Optimized Transfer option do not require the sources to be synchronized to make a manual transfer. The Source Transfer screen indicates the synchronization between the two sources, while the voltage and frequency are displayed on the Mimic. See Figure 46. Transfer is inhibited if the deviation exceeds the parameter set in the Source Set Points. See User Settings on page 89

NOTE

If one source will be de-energized for an extended period (hours or days), set the unit to bypass mode for the remaining source. Without using bypass, if a failure occurs in the switch components for remaining source, the Liebert STS2 does not have a second source to switch to and the load would not receive power. See Maintenance Bypass on page 67 for bypass instructions.

If your system contains the LED front panel instead of the LCD touch screen, refer to 14.2.2 - Manual Transfer / Preferred Source Selection for instructions on this procedure.

Figure 46 Source transfer screen

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