Liebert RAC2-8 manual Setup Standby Unit Options

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Section 3: Operation

Setup Standby Unit Options

Press 9 from the Main Menu to display the Set Standby Unit Options screen:

RAC2-8		MAIN MENU
** SET		STANDBY UNIT OPTIONS **
1.	Auto Sequencing			=	ON
2.	Standby Testing			=	OFF
3.	Day	Interval		=	89
4.	At Time		= 07:00

<ESC>		TO EXIT
Auto Sequencing = (ENTER 1						for ON, 0 for OFF) >OFF
SET STANDBY UNIT OPTIONS
1.	Auto Sequencing			=	OFF
2.	Standby Testing			=	OFF
3.	Day Interval			=	89
4.	At	Time	= 07:00
<ESC>		TO EXIT

Two options are available for controlling Standby units (in addition to Autochangeover). The RAC2-8 will operate with both of these options turned OFF, or with one of them turned ON. Select the option (or neither) required for your installation. The interval (in days) and time of day are user selected.

Auto Sequencing balances the run time of units by changing the status of a Standby unit to Running, and changing the Running unit to Standby.

Standby Testing tests the operating condition of a Standby unit by turning it ON for a period of time equal to the Hold Delay plus the Alarm Delay. The Running unit is turned OFF during this period if it is programmed to shutdown on an alarm.

Liebert RAC2-8 • 25

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Contents $XWRð&KDQJHRYHUý&RQWUROOHU Table of Contents Table of Figures RAC2-8 UnitPage Introduction Page Installation To start up the RAC2-8Operation Page Operation Glossary of Control Functions for more detailsSequencing Status Screens cont’d Status Sub-menuDelay UnitsStatus Sub-menu cont’d Set Options Sub-menuSet Options Sub-menu cont’d Function Delays TEMP/HUM Password StandbyAlarm Sub-menu Time Set Clock Sub-menuDate DAY of WeekUnit 01 Forced on Force OFF Restore Return Terminal LOG onStatus Screen Number of ZONES/NUMBER of Units PER Zone Setup Zones/Units OptionsSetup Zones/Units Options cont’d Unit StatusUnit Shutdown on Alarm Emergency Power Units08 0 no Alarms Review and Alarms Clear Unit LabelsSet Clock Override a Unit Set Modem Options Setup Temp/Humid Options Setup Temp/Humid Options cont’dSet Modem Options cont’d Setup Standby Unit Options Display SS Alarm Block Set New PasswordAlarms List of AlarmsAlarm Delay Alarm AnnunciationAlarm Communications AutochangeoverAutosequencing Common Alarm-Output Clear AlarmsCommon Alarm-Inputs KeyEmergency Power Operation DelayEmergency Power OFF EPO Hold DelayInactive Unit Humidity AlarmsHumidity Lockout IntervalPower Failure Mode Normal TemperaturePassword OverrideStandby Testing Restart DelayRestore Running UnitsTemperature Staging Temperature AlarmsTemperature Sensitivity TerminalZones Installation TB2 RAC2-8 Dimensional Enclosure Diagram RAC2-8 Component Arrangement RAC2-8 Connection Diagram RAC2-8 Switch and Jumper Settings