Liebert Static Transfer Switch 2, Installation, Operation & Maintenance Manual

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86 STS2 Touch Screen Display
deviation setting is the allowable frequency variation from nominal (60.0 or 50.0 Hz) before
activating the frequency deviation alarm. The frequency setting applies to both input sources.
a.
Configure this setting with a range of 0.1 – 3.0 Hz
The default setting is 0.5 and the resolution is 0.1.
b. Select OK to save the setting.
9. Select RETRANSFER DELAY.
A keypad is displayed.
With the secondary source being used, this setting sets the length of time the switch waits until
attempting to transfer back to the preferred source.
a.
Configure this setting with a range of 1 to 60 seconds.
The default setting is three (3) seconds and the resolution is 1 second.
b. Select OK to save the setting.
The setting is now displayed in the adjacent field in the User Settings dialog box.
10. Select AUDIO LEVEL.
A dialog box is displayed with HI and LO settings.
This choice sets the loudness of the horn or beeper that is sounded for audible alarms.
a.
Configure this setting with a range of 1–10 (ten).
The default setting is 5. The settings have an increment of 1 (one).
b. Select OK to save the setting.
The setting is now displayed in the adjacent field in the User Settings dialog box.
You can select TEST to briefly sound the alarm to judge its volume.
11. Select DISPLAY BRIGHTNESS.
A dialog box is displayed with HI and LO settings.
This choice sets the brightness for the touch screen.
a.
Configure the Contrast and Brightness settings with a range of 1 – 10 (ten).
b. Select OK to save the settings.
12. Set the AUTO REXFER ENABLE choice.
The auto retransfer enable setting determines whether the switch automatically returns the
preferred source after that source is restored.
• Select YES to enable the automatic transfer.
• Select NO to disable the automatic transfer. The setting requires transfers be done manu-
ally.
13. Set the AUTO RESTART ENABLE choice.
This setting determines whether the STS2 can be started automatically when power is restored
after it has been lost.
• Select YES to enable the automatic restart.
• Select NO to disable the automatic restart. This settings requires a manual restart of the
STS2.
14. Select a setting for the I-PEAK RESET.
• Select AUTO to configure the static transfer switch to automatically reset when a fault
clears and the voltage and current are normal.
• Select MAN to require a manual reset of the static transfer switch when fault clears and
the voltage and current are normal.