Vertiv Liebert AC8 User manual

Liebert® AC8
User Manual

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If you encounter any installation or operational issues with your product, check the pertinent section of
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https://www.VertivCo.com/en-us/support/ for additional assistance.

TABLE OF CONTENTS
1 Introduction 1
1.1 Methods of Viewing and Configuring the Liebert AC8 1
1.2 Data Logs 1
1.3 Transformer Module 2
1.4 Available Alarms 2
1.5 Outside Enclosure Overview 2
1.6 Typical Configuration 3
1.7 Controller Board Overview 4
1.8 LED Indicators 8
1.9 Typical Sequence 10
2 Installation 11
2.1 Installation Considerations 11
2.1.1 Unpacking and Preliminary Inspection 11
2.2 Surface-Mounting the Liebert AC8 12
2.2.1 Mounting the Panel 12
2.3 Flush-Mounting the Liebert AC8 13
2.3.1 Mounting the Panel 14
2.4 Connect Power to the Liebert AC8 14
2.4.1 Termination and Mounting 15
2.4.2 Connecting the Battery Pack 16
2.4.3 Turning On the Liebert AC8 16
3 Wiring and Connections 17
3.1 Wiring Specifications 17
3.2 Connecting Digital Inputs and Digital Outputs 19
3.2.1 Connecting Digital Inputs 20
3.2.2 Connecting Digital Outputs 21
3.2.3 Setting the Digital Output Jumpers 21
3.2.4 Connecting Control Relay Outputs 23
3.2.5 Connecting the Emergency Power Operation (EPOP) Input 24
3.2.6 Setting the EPOP Jumper 24
3.3 Connecting Analog Inputs 25
3.3.1 Setting the 12VDC/24VDC Analog Power Jumper 26
3.3.2 Connecting the Analog Ground 26
3.4 Connecting Common Alarm Outputs 27
3.5 EIA422 Liebert SiteScan Web™ Connector 27
3.6 Communications Connections 27
3.6.1 RS232 Connector 28
3.6.2 Phone Line Connector 28
4 Overview of Menus 29
4.1 Opening Screen Overview 31
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4.2 Main Menu Overview 32
4.3 LCD Menu Overview 32
5 View Status Options 35
5.1 View Active Alarms 37
5.1.1 Active Alarms 37
5.2 View Alarm Log 38
5.2.1 Alarm Log 38
5.2.2 Backing Up the Alarm Log (Service Terminal Interface only) 39
5.3 View Event Log 39
5.3.1 Event Log 39
5.3.2 Backing Up the Event Log (Service Terminal Interface only) 40
5.4 View Trend Log 41
5.4.1 Select a Sensor 41
5.4.2 View a Trend Log 41
5.4.3 Backing Up the Trend Log (Service Terminal Interface only) 42
5.5 View Input Status 42
5.5.1 Input Status 42
5.6 View Output Status 43
5.6.1 Output Status 43
5.7 View Pager Numbers 45
5.7.1 Select a Pager 45
5.7.2 View a Pager Number 45
5.7.3 View a Pager PIN 45
5.8 View Operation 46
5.8.1 Select a Zone 46
5.8.2 View Operation 46
5.9 View Control Status 47
5.9.1 Control Status 47
6 Silence Alarm & Backup Log Files (Service Terminal Interface) 49
6.1 Silence Alarm (Service Terminal Interface) 49
6.2 Back Up Log Files (Service Terminal Interface only) 50
7 System and Control Options 53
7.1 Login 53
7.2 Setup System - Overview 56
7.3 Setup System - Setup Inputs 56
7.3.1 Change Label (Name of Input) 57
7.3.2 Define Input as Normally Open or Normally Closed 58
7.3.3 Define Input as Alarmable or Event 58
7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode 59
7.3.5 Set Up Delay Time 59
7.4 Setup System - Setup Common Alarm 60
7.5 Setup System - Setup Sensor 60
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7.5.1 Identify the Sensor as Connected 62
7.5.2 Change Sensor Label (Name) 63
7.5.3 Change Units Label 63
7.5.4 Change 4 mA Value 64
7.5.5 Change 20 mA Value 64
7.5.6 Change Offset Value 65
7.5.7 Define Sensor as Alarmable or Event 65
7.5.8 Set Up Alarmable Sensors in Latched or Unlatched Mode 66
7.5.9 Change Low Setpoint 66
7.5.10 Change High Setpoint 67
7.5.11 Set Up Delay Time 68
7.6 Setup System - Setup Zones 68
7.6.1 Set Up a Zone 69
7.7 Setup System - Setup Outputs 70
7.7.1 Define Output as Normally Open or Normally Closed 71
7.7.2 Define Operating or Standby Mode 71
7.7.3 Enable or Disable an Output Device in Alarm Status 72
7.7.4 Enable or Disable a Device during Emergency Power Operation 72
7.7.5 Configure Output for Loss of Power (“Fail-Safe”) 72
7.8 Setup System - Setup Modem & Pagers 72
7.8.1 Modem Setup - Initialization String 73
7.8.2 Modem Setup - Additional Features (Service Terminal Interface only) 75
7.8.3 Pager Setup - Pager Number and PIN 78
7.8.4 Pager Setup - Communications Check (Service Terminal Interface only) 80
7.9 Setup System - Setup System Info 82
7.9.1 Change Password 83
7.9.2 Change Date & Time/Automatic Daylight Saving Time 84
7.9.3 Setup Site ID 85
7.9.4 Connect Battery 85
7.9.5 Backup and Upload Configuration File (Service Terminal Interface only) 86
7.9.6 Setup Serv Ph Num - Enter Phone Number 88
7.9.7 Setup Serv Ph Num - Communications Check (Service Terminal Interface only) 89
7.9.8 Factory Defaults 91
7.9.9 Perform Firmware Update (Service Terminal Interface only) 91
7.9.10 Initiate Remote Alarm Test (Service Terminal Interface only) 93
7.10 Setup Operation 95
7.10.1 Turn Automatic Sequencing On or Off 96
7.10.2 Turn Standby Testing On or Off 97
7.10.3 Specify Failed Standby Response 98
7.10.4 Specify Hold Delay Time 99
7.10.5 Specify Restart Time 99
7.10.6 Specify Staging 100
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7.11 Setup System - Setup I/O Matrix 101
7.11.1 Set Up Mapping for a Digital Input 102
7.11.2 Set Up Mapping for an Analog Sensor Input 103
7.12 Override Output 103
7.13 Clear Alarms & Logs 105
7.13.1 Clear Active Alarms 105
7.13.2 Clear the Alarm Log 105
7.13.3 Clear the Event Log 106
7.13.4 Clear the Trend Logs 106
8 Specifications 107
8.1 Liebert AC8 Specifications 107
Appendix A: Service Terminal Interface 109
Appendix B: Default Settings Quick Reference Guide 163
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1 INTRODUCTION
The Liebert AC8 is ideal for coordinated control of systems with redundant equipment, such as multiple
environmental units or pumps. When the Liebert AC8 controller detects an alarm in an operating device,
the Liebert AC8 enables a standby device and controls the device in alarm as configured, either leaving
that device operating or disabling it.
The Liebert AC8 controller can also balance usage of devices by rotating units through Operating and
Standby modes according to a user-defined schedule. This helps keep redundant equipment operating
efficiently and only when needed. The Liebert AC8 can perform routine testing of standby devices and
alert personnel if a standby device fails an operating test and requires attention.
The staging feature permits standby devices to be turned on or off when a sensor detects specified levels.
For example, the Liebert AC8 might be configured to turn on a fan when the temperature reaches 75°F,
then turn on a second fan at 80°F. When the temperature falls below 80°F, the second fan is turned off;
when it drops below 75°F, the first fan is turned off.
Another capability of the Liebert AC8 is monitoring the status of connected devices and keeping
personnel apprised through local alarming. The Liebert AC8 employs local alarming and remote paging
services to keep personnel on-site and at remote locations apprised of the status of equipment.
The Liebert AC8 controller can interface with anything that closes an electrical contact. To improve
process efficiency and troubleshooting, the controller tracks data in three types of logs: alarm, event and
trend. The Liebert AC8 has a local LCD interface and a remote dial-up interface.
When an alarm condition arises, the Liebert AC8 displays alarm information, sounds an audible alarm,
changes the state of the common alarm relay and turns connected devices on or off according to user
configuration. If configured, the controller also sends pager notifications. See Typical Configuration on
page3 for a more detailed example.
1.1 Methods of Viewing and Configuring the Liebert AC8
The Liebert AC8 features access through two interfaces that allow users to configure the unit, silence
alarms, back up logs, and perform many other functions to keep a large or small operation running
smoothly and safely.
•LCD—liquid crystal display on the front of the panel
•Service Terminal Interface—accessible via computer connected directly through an RS232
port or remotely through the Liebert AC8’s onboard modem
These interfaces permit easy access and configuration of the Liebert AC8, allowing users to view data,
silence alarms and have full access to information stored in the controller, including logs of alarms and
events.
One more interface—Liebert’s SiteScan Web® enterprise monitoring system—is primarily for monitoring,
though SiteScan also provides some configuration functions.
1.2 Data Logs
The three types of data logs—alarm history, event history and trend data of analog sensor
readings—can be viewed on the LCD on the front of the Liebert AC8 and downloaded through onboard
communications ports.
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1.3 Transformer Module
A Transformer Module converts 115VAC or 230VAC to 24VAC.
1.4 Available Alarms
The alarms available with the Liebert AC8 are:
•Discrete input alarm
(for each digital input)
•High setpoint
•Low setpoint
•Loss of power
•Low battery
•Check battery
•Battery unplugged
•Internal modem fault
•No standby available
•Standby device
failed
•No restart available
•Emergency power
alarm
1.5 Outside Enclosure Overview
The Liebert AC8 controller board comes in an enclosure that is 2-3/4" deep and has a built-in liquid
crystal display (LCD) and a key lock, as shown in Figure 1.1 below. The enclosure is made of metal to
accommodate secure conduit fittings and protect components against environmental debris.
Figure 1.1 Liebert AC8 enclosure—external features
The enclosure houses the controller board and Transformer Module, as shown in Figure 1.2 on the facing
page.
The enclosure must be secured to a wall, either flush-mounted or recessed in the wall, as described in
Installation on page11. Knockouts and access slots on the top and bottom allow easy connection of wires
and cables (see 3.0- Wiring and Connections) with either mounting type.
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Figure 1.2 Liebert AC8 enclosure—internal features
1.6 Typical Configuration
Figure 1.3 on the next page shows an example of external devices connected to the Liebert AC8
controller board. Up to eight devices may be connected to the eight digital inputs and eight digital
outputs. There may be up to four analog sensors connected to the analog inputs, and up to two devices
connected to the control relay outputs. The EPOP connection allows for one device, possibly a UPS or
generator input actuated during a power failure.
Remote access is available via Liebert SiteScan Web™ and through the modem, which enables pager
notifications and use of the Service Terminal Interface. A computer may be connected to the RS232 port,
providing access to the features of the Service Terminal Interface.
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Figure 1.3 Typical Configuration
1.7 Controller Board Overview
The Liebert AC8 controller board has connectors for eight digital inputs, four analog inputs, eight digital
outputs, two control relay outputs and an EPOP contact input, as shown below. The board comes
complete with light emitting diodes (LEDs) to display the status of connected devices, a battery pack for
short-term backup, communications ports, power connections and other features necessary to control
your operation.
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