Emerson user manual Connect Power to the Liebert AC4, Electrical connections to panel

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Installation

2.4Connect Power to the Liebert AC4

The Liebert AC4 requires 24VAC for proper operation. Liebert recommends using the optional Transformer Module manufactured by Liebert or another UL-approved class 2 power unit to obtain proper voltage. If the power unit is not a class 2 circuit, it must be protected with an IEC 5 x 20mm time lag 2A fuse. For information, consult your local dealer, Emerson representative or the Emerson Network Power Liebert Worldwide Support Group.

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Check that power is removed from wires prior to installation. This unit should be installed only by properly trained and qualified personnel.

! CAUTION

Risk of electric shock. Can cause property damage, injury and death.

The Liebert AC4 is designed for use on properly grounded (earthed) 24VAC power, 50Hz or 60Hz. The ground wire for the power lead must be wired to the earth ground terminal (stud located next to the 24VAC terminal block).

This equipment is intended to be installed by a qualified and certified electrician who must review and approve customer supplied wiring and circuit breakers, verify correct input and grounded (earthed) connections to ensure compliance with technical standards and national and local electrical codes.

! WARNING

Risk of electric shock. Can cause property damage, injury and death.

Be sure that the Power On/Off switch is set to OFF before installing any wiring to this unit. The switch is in the top left corner of the unit, just below the battery pack.

To connect electrical power:

1.Run conduit and electrical wiring from building to the Liebert AC4.

2.Use copper wires only; proper wiring to use for power is 18-22 AWG stranded and shielded (18 AWG is recommended—see Table 4). Strip wires 1/2".

Figure 6 Electrical connections to panel

External wiring through knockout

Ground wire (black)

Earth ground terminal

24VAC wiring (red & white)

Power On/Off switch

24VAC input connector

3.Secure the incoming electrical service wires to the Liebert AC4’s 24VAC input by sliding the wires into TB7, the 24VAC input terminal block. There is no polarity requirement when connecting to TB7. The ground wire must be connected to the earth ground terminal located on the side of the panel (see Figure 6).

11	Liebert® AC4™

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Contents Liebert AC4 Page Table of Contents Setup System Setup Common Alarm 7.5 Setup System Setup Zones Setup Menu Appendix a Service Terminal InterfaceFigures Available Alarms Methods of Viewing and Configuring the Liebert AC4Data Logs IntroductionOperation LCD for configurationOutside Enclosure Overview Device RS232 LiebertLiebert HimodHimod Typical ConfigurationDevice Liebert Challenger Controller board components Controller Board OverviewDIP switch ConnectorLCD connector 24VAC powerOutput LEDs Status LEDs Input LEDs LED IndicatorsLED indicators summary Typical Sequence Installation Installation ConsiderationsPacking Contents Unpacking and Preliminary InspectionMounting the Panel Surface-Mounting the Liebert AC4Required tools Flush-Mounting the Liebert AC4 Electrical connections to panel Connect Power to the Liebert AC4Wiring specifications Wiring SpecificationsWiring and Connections Connecting Liebert Precision Cooling Units Connecting Digital Inputs and OutputsConnecting Digital Inputs Numbering keysDigital output jumper settings Connecting Digital OutputsSetting the Digital Output Jumpers RS232 Connector Connecting Common Alarm OutputsCommon alarm outputs Serial interface connector RS232/EIA5Guide to Liebert AC4 functions Overview of MenusLCD Menu Overview Opening Screen OverviewMain Menu Overview View Status Options Active Alarms View Active AlarmsClearing Active Alarms Active AlarmsAlarm Log View Alarm LogAlarm log conditions Alarm LogEvent Log View Event LogEvent log conditions Event LogInput Status View Input StatusViewing Additional Input Data Digital input statesOutput Status View Output StatusViewing Additional Output Data Digital output statesSilence Alarm Service Terminal Interface only Silence Alarm & Backup LOG Files Service Terminal InterfaceBack Up Log Files Service Terminal Interface only Silence Alarm & Backup Log Files Service Terminal Interface Login LoginSystem and Control Options Valid characters for data entrySystem & Control menu Clear Alarms&Logs selected Login ScreenSetup System menu Clear Alarms/Logs menuSetup System Setup Inputs Setup System OverviewDefine Input as Normally Open or Normally Closed Define Input as Alarmable or EventChange Label Name of Input Set Up Delay Time Set Up Alarmable Inputs in Latched or Unlatched ModeDelay Time Latched / UnlatchedReset Common Alarm Setup System Setup Common AlarmChange to Reset Y or Not Reset N Set Up a Zone Setup System Setup ZonesMessage if too few devices entered Message if too many devices enteredDefine Output as Normally Open or Normally Closed Setup System Setup OutputsEnable or Disable an Output Device in Alarm Status Define Operating or Standby ModeConfigure Output for Loss of Power Fail-Safe Set ModeChange Password Setup System Setup System InfoChange the Password Reset Password to the Factory Default AaaaSetup Site ID Setup Site IDSet Date & Time/Automatic Daylight Saving Time Set Date & TimeBackup and Upload Configuration File Back Up the Configuration File Upload the Configuration File Firmware Update Service Terminal Interface only Factory DefaultsFactory Defaults Perform Firmware UPDATE-YESY or NON? N Select Setup Operation Setup OperationSetup Operation Menu Default settings operation featuresActivate / Deactivate Turn Automatic Sequencing On or OffSet Interval & Start Time 1- to 99-Day Interval Set Start Time Hour IntervalChange Standby Testing Turn Standby Testing On or OffSpecify Failed Standby Response Failed Standby responseHold Delay Time Specify Hold Delay TimeRestart Delay Time Setup Operation MenuOverride Output Clear Active Alarms Clear Alarms & LogsClear the Alarm Log Clear the Event LogSpecifications Liebert AC4 SpecificationsSpecifications Liebert AC4 Comparison of Functions LCD and Service Terminal Interface Appendix a Service Terminal InterfaceConnecting to the Service Terminal Interface Specify COM Port Connection COM1 Port SetupCreate a Connection Ascii Setup Properties SetupSettings tab Ascii Setup buttonClick on the file name for example, AC4.ht Connect to the Service Terminal InterfaceSetup Menu Overview Silence Alarm and Backup Log FilesView Status Overview Main Menu For sample screens, seeView Active Alarms View Active AlarmsView Status Menus Main MenuView Alarm Log View Alarm LogView Input Status View Event LogView Event Log View Input StatusView Output Status View Output StatusSection A.5.1 Section A.5.2 Silence AlarmBackup Log Files Alarm Log File Back Up Alarm Log FileBackup Log Files Event Log File Back Up Event Log FileLogin Setup MenuLogin Menu Setup Menu Setup MenuTips on Using the Service Terminal Interface See DescriptionSetup Inputs Setup InputsSetup Zones Setup Common AlarmSetup Common Alarm Setup ZonesSetup Outputs Setup OutputsChange Password Setup System InfoSetup System Info Set Date & Time Setup Site IDBackup & Upload Configuration File Backup Factory Defaults Backup & Upload Configuration File UploadFirmware Update Firmware Update Service Terminal Interface onlyAuto Sequencing Setup OperationSetup Operation Auto Sequencing Setup Operation Standby Testing Standby TestingSetup Operation Failed Standby Hold DelaySetup Operation Hold Delay Failed StandbySetup Operation Restart Delay Restart DelayOverride Output Override OutputClear Alarms & Logs Clear the Alarm Log Clear Alarms & LogsClear Alarms & Logs Clear Active Alarms Clear Alarms & Logs Clear the Event Log Specifications Liebert AC4 Specifications Specifications Liebert AC4 Page Is t Ne tTwor k Care