Vertiv Liebert AC8 User manual

Liebert® AC8
User Manual

Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent section of
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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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Item Description For more information, see:
A - Power On/Off
switch
Power switch for the controller board. When switched off, the
battery pack is disabled.
Connect Power to the Liebert
AC8 on page14
B - Battery pack
Provides battery backup during a power loss to maintain normal
operation of the panel for a minimum of 10 minutes. The analog
inputs will not be functional during a power loss (P/N 133455P1).
Connecting the Battery Pack
on page16
Connect Battery on page85
C - EIA422 LEDs Indicates the connection status between the Liebert AC8 and
Liebert SiteScan Web™.LED Indicators on page8
D - Audible horn Provides audible notification when an alarm occurs. N/A
E - Audible horn
jumper Jumper to disable the audible horn (factory default is enabled). N/A
F - Common Alarm
connectors
The two common alarm connections are used to connect to a
secondary warning device such as a horn, light or Building
Management System (BMS). When an alarm is present, the
contacts close and the external warning device is activated/notified.
The common alarm contacts may be configured to be reset with the
Silence button/command.
3.0: Wiring and Connections
Connecting Common Alarm
Outputs on page27
Setup System - Setup
Common Alarm on page60
G - Digital output
status LEDs
Each output has an LED to indicate its status: ON/OFF
(energized/de-energized). LED Indicators on page8
H - Control relay
outputs
Each of the two output connections is a two-state point: ON/OFF
(energized/de-energized). Digital and analog inputs may be
mapped to either or both relays to trigger change in state.
An example of a control relay output point is a humidity lock-out.
3.0: Wiring and Connections
Connecting Control Relay
Outputs on page23
View Control Status on
page47
Setup System - Setup I/O
Matrix on page101
I - Manual Override
Switch (outputs)
Placing the switch in the ON position will turn ON, or energize, all
eight outputs simultaneously. This switch removes all automatic
output control from the Liebert AC8.
The factory default is OFF (outputs controlled by programming).
Override Output on page103
J - Digital output
connectors
Each of the eight output connections is a two-state point: ON/OFF
(energized/de-energized).
An example of a field digital output point is an air unit On/Off control
circuit.
3.0: Wiring and Connections
Connecting Digital Outputs on
page21
View Output Status on
page43
Setup System - Setup Outputs
on page70
K - Status LEDs Indicates the operational status of the controller board. LED Indicators on page8
L - Digital output
loss-of-power jumper
One of eight output jumpers. Each digital output has a jumper to set
the fail-safe position of the output point when power fails. The OFF
position makes the contact Normally Open (factory default). The
ON position makes the contact Normally Closed.
Note: The jumper position has no effect on the contact when the
Liebert AC8 has power.
Setting the Digital Output
Jumpers on page21
Configure Output for Loss of
Power (“Fail-Safe”) on
page72
Table 1.1
Controller board components
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Item Description For more information, see:
M - Digital input
connectors
Each of the eight input connections is a two-state point: ON/OFF
(energized/de-energized).
An example of a field digital input point is a common alarm contact
on an air unit.
3.0: Wiring and Connections
Connecting Digital Inputs on
page20
View Input Status on page42
Setup System - Setup Inputs
on page56
N - Digital input
status LEDs
Each input has an LED to indicate its status: ON/OFF
(energized/de-energized).
LED Indicators on the next
page
O - EPOP contact
input
The emergency power operation (EPOP) input connection is a two-
state point: ON/OFF (energized/de-energized).
An example of an EPOP input point is a UPS or a generator.
3.0: Wiring and Connections
Connecting the Emergency
Power Operation (EPOP)
Input on page24
P - EPOP jumper Jumper to enable or disable emergency power operation (EPOP).
Factory default is disabled.
Setting the EPOP Jumper on
page24
Q - Analog ground
connector
Connection for an externally powered analog sensor that needs a
reference to ground.
Connecting the Analog
Ground on page26
R - Analog input
connectors
Each of the four input connections accepts a 4/20mA signal.
An example of a field analog input point is a temperature sensor.
3.0: Wiring and Connections
Connecting Analog Inputs on
page25
View Input Status on page42
Setup System - Setup Sensor
on page60
S - 12VDC/24VDC
analog input jumper
Jumper to select voltage supplied for two-wire analog sensors. The
jumper supplies all four analog input connectors with the same
voltage. Factory default is 24VDC.
Setting the 12VDC/24VDC
Analog Power Jumper on
page26
T - SiteScan Web
connector (EIA422)
Connection to monitor Liebert AC8 from Liebert’s SiteScan Web™
graphical monitoring package.
3.0: Wiring and Connections
EIA422 Liebert SiteScan
Web™ Connector on page27
U - EIA485 connector Not presently used N/A
V - Serial interface
connector
(RS232/EIA574)
Connection for laptop or video terminal. Used for configuration and
monitoring using the Service Terminal Interface. Requires a null
modem cable for connectivity
(P/N 201258P1).
RS232 Connector on page28
Connecting to the Service
Terminal Interface on
page111
W - Phone line
connector
Connection for phone line. Used for pager notifications, service
phone number, and configuration and monitoring using the Service
Terminal Interface. Requires an RJ11 connector.
Phone Line Connector on
page28
Setup System - Setup Modem
& Pagers on page72
Setup Serv Ph Num - Enter
Phone Number on page88
Connecting to the Service
Terminal Interface on
page111
X - Power receptacle
(Transformer Module)
115VAC power receptacle to power laptop during configuration
and diagnostics. Receptacle not available on 230VAC Transformer
Module.
Termination and Mounting on
page15
3.0: Wiring and Connections
Table 1.1 Controller board components (continued)
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Item Description For more information, see:
Y - Power On/Off
switch (Transformer
Module)
Power switch to turn power On/Off to both Transformer Module
24VAC connectors and power receptacle.
Termination and Mounting on
page15
3.0: Wiring and Connections
Z - 24VAC connector
(Transformer Module)
One of the two 24VAC connectors for power (the second is also on
the right side of the Transformer Module near the top). Each
connector is rated for 40VA.
Termination and Mounting on
page15
3.0: Wiring and Connections
AA - Modem On-board modem with 9600 baud rate. Setup System - Setup Modem
& Pagers on page72
BB - Modem status
LEDs Indicates the operational status of the modem. LED Indicators below
CC - DIP switch 1 DIP switch used for resetting password to default. Change Password on
page83
DD - LCD connector Connection for the LCD on the enclosure door. N/A
EE - LCD contrast
adjustment Adjustment contrast for the LCD on the enclosure door. N/A
FF - Battery pack
connector Connection for battery pack lead. Connecting the Battery Pack
on page16
GG - 24VAC power
connector Power connection for the controller. Requires 24VAC. Connect Power to the Liebert
AC8 on page14
HH - Transformer
Module
Transformer Module used to convert 115VAC or 230VAC to
24VAC.
Termination and Mounting on
page15
Table 1.1 Controller board components (continued)
1.8 LED Indicators
The Liebert AC8 controller board has LED indicators that show the status of inputs, outputs and the
common alarm, as well as the modem, Liebert® SiteScan Web™ and EPOP connections.
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LED
Type LED Color Description
EIA422
LEDs
422 TX Green Liebert AC8 is transmitting information over the EIA422 port
422 RX Green Liebert AC8 is receiving information over the EIA422 port
EPOP
LED EPOP IN Red Indicates Emergency Power Operation is open or in alarm
Modem
LEDs
TX Green Liebert AC8 is transmitting information via the modem
RX Green Liebert AC8 is receiving information via the modem
DTR Green Indicates data terminal is ready (DTR)—lights up when modem is dialing
DCD Green Indicates data carrier is detected (DCD)—lights up when modem has
connection
Output
LEDs
OUTPUT1 Green Indicates output is ON or energized
OUTPUT2 Green Indicates output is ON or energized
OUTPUT3 Green Indicates output is ON or energized
OUTPUT4 Green Indicates output is ON or energized
OUTPUT5 Green Indicates output is ON or energized
OUTPUT6 Green Indicates output is ON or energized
OUTPUT7 Green Indicates output is ON or energized
OUTPUT8 Green Indicates output is ON or energized
CTRLLOCK Green Indicates Control Relay 2 is ON or energized
SENLOCK Green Indicates Control Relay 1 is ON or energized
CMN ALR Green Indicates Common Alarm Relay is ON or energized
Status
LEDs
MOP Green
Indicates the microprocessor is operating properly (MOP)—must be on before
Liebert AC8
will function
FPROG Green Indicates firmware is being upgraded—lights up during upgrade process
574 TX or 232 TX Green Liebert AC8 is transmitting information via the RS232 port
574 RX or 232 RX Green Liebert AC8 is receiving information via the RS232 port
485 RX Green Not used
485 TX Green Not used
Input
LEDs
INPUT1 Red Indicates input is ON or energized
INPUT2 Red Indicates input is ON or energized
INPUT3 Red Indicates input is ON or energized
INPUT4 Red Indicates input is ON or energized
INPUT5 Red Indicates input is ON or energized
INPUT6 Red Indicates input is ON or energized
INPUT7 Red Indicates input is ON or energized
INPUT8 Red Indicates input is ON or energized
Table 1.2
LED indicators summary
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1.9 Typical Sequence
Figure 1.4 below shows a typical sequence of how the Liebert AC8 functions after detecting a change in a
monitored device. Many responses depend on configuration settings. This example shows what happens
when a digital input changes state—assuming the input is defined as alarmable—and when the condition
returns to normal.
Figure 1.4 Example of typical sequence
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2 INSTALLATION
This section provides instructions for installing, mounting and connecting power to the Liebert AC8.
2.1 Installation Considerations
The Liebert AC8 must be installed indoors and may be mounted on the surface of a wall or flush-mounted,
depending on the user’s application, the location of equipment and sensors to be monitored and the type
of wall the unit will be mounted on.
The Liebert AC8 should be mounted where it can be easily accessed. On-site personnel would access the
unit through the LCD on its front cover, service terminal connected to the RS232 port or through Liebert
SiteScan™. For off-site monitoring, the Liebert AC8 should be placed near communications means such as
a telephone line connection that would permit remote access.
In addition to the communications connections, the site also must have electrical service and must permit
connecting the unit’s eight digital inputs, eight digital outputs and four analog inputs.
The wall material must be capable of supporting the weight of the Liebert AC8: see Specifications on
page107.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.
2.1.1 Unpacking and Preliminary Inspection
•Before unpacking the Liebert AC8, inspect the shipping carton for damage or signs of
mishandling, such as gashes or holes in the carton or severely flattened corners.
•Open the shipping crates carefully. Use care to avoid puncturing the container with sharp
objects that might damage the contents.
•Inspect the Liebert AC8 and all included components for damage.
•If any damage from shipping or mishandling is observed, immediately file a damage claim with
the shipping agency and forward a copy to:
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Packing Contents
Standard Components
Liebert AC8 controller board in enclosure
User Manual
Keys (2) to panel door lock
Backup Battery - installed in unit (not connected or charged)
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RS232 Configuration Cable
2.2 Surface-Mounting the Liebert AC8
NOTE: Removing the conduit knockouts before mounting the Liebert AC8 on the wall will ease
installation and prevent strain on the mounting hardware and wall. It is imperative to remove the
knockouts if the unit is to be flush-mounted.
After determining where to place the unit, check to ensure that you have all the hardware required to
install the panel on the surface of a wall. Obtain the needed tools and material.
Required tools
•Electric drill (if surface is too hard to drive screws without pilot holes)
•Screwdriver
•Marker to denote layout of holes
•Four screws, each #10
2.2.1 Mounting the Panel
CAUTION: Check building plans and other relevant documents to determine whether mounting
the Liebert AC8 at the selected location might cause cutting or otherwise damaging electrical
or communication wiring or pipes.
To mount the panel:
1. Mark the wall for mounting holes, using the back of the unit as a template (see Figure 2.1 on
the facing page).
2. Drill holes, if required, to install the four #10 screws that will secure the Liebert AC8 to the wall.
Clean up the debris.
3. If the wall material is not strong enough to hold the screws securely, use wall anchors.
4. Install the top two screws—the screw heads must be small enough to slip through the larger,
bottom portion of the pear-shaped mounting slot in the Liebert AC8 (see inset in Figure 2.1 on
the facing page). The screws must also be large enough to extend over the edges of the top of
the mounting slot.
5. Hang the Liebert AC8 on the screws, letting the panel slip down until the screws are in the
smaller, upper portion of the slot.
6. Tighten the screws until they are snug.
7. Insert the remaining two screws in the bottom holes on the back of the panel and tighten.
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Figure 2.1 Mounting dimensions
2.3 Flush-Mounting the Liebert AC8
NOTE: Removing the conduit knockouts before mounting the Liebert AC8 on the wall will ease
installation and prevent strain on the mounting hardware and wall. It is imperative to remove the
knockouts if the unit is to be flush-mounted.
The rectangular access doors on the top and bottom of the Liebert AC8 must be reversed so they slide
the opposite direction. Leaving the doors as shipped from the factory prevents them from being opened
when the panel is flush mounted in a wall.
The Liebert AC8 may be flush-mounted according to company practices—either with screws through the
sides of the panel into wall supports or with hanging hardware that attaches to the back of the panel.
After determining how and where to place the unit, check to ensure that you have all the hardware
required to install the panel in the wall. Obtain the needed tools.
Required tools
•Saw
•Electric drill
•Screwdriver
•Marker to denote layout of the hole to accommodate the Liebert AC8
•Mounting hardware
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2.3.1 Mounting the Panel
CAUTION: Check building plans and other relevant documents to determine whether mounting
the Liebert AC8 at the selected location might cause cutting or otherwise damaging electrical
or communication wiring or pipes.
To mount the panel:
1. Mark the wall for the cutout to accommodate the panel, using the back of the unit as a
template.
2. Drill a pilot hole for the saw blade, if required.
3. Use the saw to cut out the marked section of the wall (if not new construction).
4. Rest the Liebert AC8 in the wall and mark where mounting screws will be inserted into the wall
studs or other support member.
5. Remove the panel and drill the holes for the mounting screws or wall anchors. Clean up the
debris.
6. Reverse the slide direction of the rectangular access doors on the top and bottom of the
Liebert AC8. Leaving the doors as shipped from the factory prevents them from being opened
when the panel is flush mounted in a wall.
7. Attach any field-supplied mounting hardware.
8. Reinsert the assembly into the wall.
9. Insert and tighten the screws or wall anchors.
2.4 Connect Power to the Liebert AC8
The Liebert AC8 must be supplied with 115VAC or 230VAC; the power supplied must match the rating of
the unit’s Transformer Module. For information, consult your local dealer, Liebert representative or the
Liebert Worldwide Support Group.
The Liebert AC8 must be installed on a branch circuit protected by a certified 15A overcurrent device.
WARNING! Check that power is removed from wires prior to installation.
CAUTION: The Liebert AC8 is designed for use on properly grounded (earthed) 115VACor
230VAC power, 60Hz or 50Hz. 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.
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