Slave System; Eco Mode; Eco Mode Setup; Figure 53 Eco Mode Settings - Emerson Liebert NXL 250 kVA Operation And Maintenance Manual

3.4.6

Slave System

Any unit designated as the Slave upon power-up / reset will monitor and lock to the Master LBS Sync
Pulse.
When the Slave unit is on bypass, the Slave will generate the LBS Sync Pulse.
• The Slave will slew to be locked to its own bypass source. The inverter in the LBS Slave system
will follow the local bypass.
• When the Slave unit is on UPS, the Slave will stop generating the LBS Sync Pulse.
When more than one Slave unit goes to bypass:
• All systems on UPS will follow the first Slave's LBS Sync Pulse
• All other Slave systems on Bypass will follow their own local Bypass Source.
3.5

ECO Mode

ECO Mode improves the overall efficiency by powering the critical bus from the bypass static switch
instead from the inverter.
3.5.1

ECO Mode Setup

ECO Mode Operation—To enable or disable ECO mode via the front touchscreen.
• Enable, Disable
• Default: Disabled
Maximum Auto Suspensions—Used to specify how many times the system is allowed to
automatically reactivate ECO Mode before the current ECO Mode session is terminated and
Excessive ECO Mode Suspension event is set.
• Min., 1; Max., 5; Iteration, 1
• Default, 3
Restart Delay—Used to specify how long the conditions to activate must be satisfied before
reactivating ECO Mode. Once Automatic Reactivation has been satisfied, the conditions must remain
satisfied for the full Restart Delay before ECO Mode is active.
• Min., 10 minutes; Max., 60 minutes; Iteration, 10 minutes
• Default, 30 minutes
Continuous Operation—Permits running ECO Mode continuously through the Start command and
Stop command.
• Enable, Disable
• Default: Disabled

Figure 53 ECO Mode settings

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Liebert NXL