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

Page 17

Installation

2.4Connect Power to the AC4

The 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, Liebert representative or the Liebert Worldwide Support Group.

! WARNING

Check that power is removed from wires prior to installation.

! CAUTION

The 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

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 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

Power On/Off switch

External wiring through knockout

Ground wire (black)

Earth ground terminal

24VAC wiring

24VAC input

(red & white)

connector

3.Secure the incoming electrical service wires to the 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).

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Contents Monitoring AC4Page 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 AC4Data Logs IntroductionOperation LCD for configurationOutside Enclosure Overview Device RS232 Liebert Himod Typical ConfigurationDevice Liebert Challenger Controller board components Controller Board OverviewDIP switch Connector RS232LCD 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 AC4Required tools Flush-Mounting the AC4 Electrical connections to panel Connect Power to the AC4Wiring specifications Wiring SpecificationsWiring and Connections Connecting Liebert Environmental Units Connecting Digital Inputs and OutputsConnecting Digital Inputs Connecting Digital OutputsRS232 Connector Connecting Common Alarm OutputsSetting the Digital Output Jumpers Digital output jumper settingsGuide to 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 System and Control Options Select Setup Operation Setup System Menu 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 TimeSetup Operation Menu Restart Delay TimeOverride Output Clear Active Alarms Clear Alarms & LogsClear the Alarm Log Clear the Event LogSpecifications AC4 SpecificationsComparison 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, seeMain Menu View Status MenusMain Menu View Active Alarms View Active AlarmsView Alarm Log View Alarm LogView Event Log View Event LogView Input Status 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 Common Alarm Setup Common AlarmSetup Zones 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 Page Company Behind the Products Technical Support/ServiceLocations Asia 23F, Allied Kajima Bldg
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AC4 specifications

The Liebert AC4 is a highly advanced cooling solution designed for critical environments, such as data centers and telecommunications facilities. As data demands rise and IT equipment generates significant heat, an effective cooling system is paramount to maintaining optimal performance and reliability. The Liebert AC4 stands out in this space, offering a blend of efficiency, flexibility, and innovative technology.

One of the main features of the Liebert AC4 is its adaptability to various configurations and applications. It can be deployed in both hot aisle and cold aisle containment setups, making it versatile for different data center designs. This flexibility allows facilities to implement cooling strategies that align perfectly with their specific layouts and operational requirements.

The Liebert AC4 employs cutting-edge, variable-speed fans that enhance energy efficiency. These fans adjust their speed according to the cooling load, ensuring that the system operates at peak efficiency while significantly reducing energy consumption. This feature is essential in critical environments, where minimizing operational costs is often as important as maintaining optimal temperatures.

In addition to energy-efficient cooling, the Liebert AC4 integrates advanced monitoring and control technologies. With built-in intelligence and compatibility with the Liebert SiteScan monitoring system, users can ensure real-time visibility into their cooling operations. This monitoring capability enables data center managers to make informed decisions and swiftly address any cooling anomalies, minimizing the risk of overheating and downtime.

Furthermore, the system is designed to be easy to install and maintain, reducing downtime during setup and upkeep. The modular design allows for scalability, enabling organizations to expand their cooling capabilities as their needs grow.

The Liebert AC4 also features a robust construction that enhances reliability and durability, making it an ideal choice for environments where equipment uptime is critical. Its streamlined design not only optimizes airflow and cooling distribution but also contributes to aesthetic considerations in professional settings.

In conclusion, the Liebert AC4 combines efficiency, versatility, and advanced technologies to deliver a reliable cooling solution for modern data centers and critical facilities. Its variable-speed fans, flexible configurations, and advanced monitoring capabilities position it as a leader in the competitive field of cooling solutions, ensuring that critical equipment remains operational and efficient. Organizations looking to enhance their cooling strategies will find the Liebert AC4 to be an invaluable asset in today’s fast-paced digital landscape.
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