Emerson Liebert ITA User manual

Liebert® ITA™
User Manual – 16-20kVA UPS

Safety Precautions
This manual contains the information concerning the installation and operation of Liebert®ITA 16kVA and 20kVA
UPS (hereinafter referred to as UPS).
Please carefully read this manual prior to installation.
You must abide by the following safety symbols used in the user manual.
Safety symbol Description
Improper operating will take risk, it may resault in death.
Improper operating will take risk, it may resault in serious physical injury and damage in the
equipment.
Read carefully and abide by the contents to operate the equipment.
To reduce the chance of accident, please read the safety precautions very carefully before operation. The
‘Caution, Note, Warning, Danger’ in this user manual and on the product do not represent all the safety points to
be observed, and are only supplement to various safety points. Therefore, the installation and operation
personnel must receive strict training and master the correct operations and all the safety points before
operation.
When operating Emerson products, the operation personnel must observe the safety rules in the industry, the
general safety points and special safety instructions provided by Emerson.
Warning
1. The UPS must be installed, commissioned and serviced by engineers designated by the manufacturer or its agent.
Failure to observe this could result in personnel safety risk, UPS malfunction and invalidation of warranty.
2. The UPS has been designed for commercial and industrial use only, and is not recommended for use in life support
applications.
3. This is a Class A UPS product. In a residential environment, this product may nevertheless cause radio interference, in
which case, the user is required to take additional measures to reduce the interference.
Danger
When the UPS is operating, some parts have high voltage, therefore, contacting with them directly or through moist objects
will result in fatal risk.
Warning
1. Before moving or re-wiring the UPS, disconnect all the inputs and make sure that the UPS is completely shutdown. Or
else, the output end may carry live voltage.
2. Liquid or other irrelevant external objects are prohibited inside the UPS.
3. In case of a fire, a dry chemical fire extinguisher is essential. Using a foam fire extinguisher will cause electric shock.
4. The output neutral line of the UPS is from the input, after the neutral line is suspended by the upstream protection
devices, the output neutral line will be unconnected.

Conformity and standards
The UPS complies with 2006/95/EC (LV Safety) and 2004/108/EC (EMC), with Australia and New Zealand EMC
Framework (C-Tick) and with the following product standards for UPS:
IEC 62040: 2008 General and safety requirements
IEC62040-2: EMC requirements, Class C2 compliant
IEC62040-3: Performance requirements and test methods
The UPS installation should follow the above instructions and use the accessories specified by manufacturer.
Warning: high leakage current
1. Earth connection is essential before connecting the input power (AC mains and battery included).
2. Earth leakage current ranges from 3.5mA to 1000mA.
3. Transient and steady-state earth leakage currents, which may occur when starting the equipment, should be taken into
account when selecting instantaneous residual current circuit breaker (RCCB) or residual current detector (RCD).
4. Note that the earth leakage current of the load will be carried by RCCB or RCD.
5. This equipment must be earthed in accordance with the local electrical codes.
Warning: backfeed protection
The UPS has a zero-voltage contact closure signal available for use with an external automatic circuit breaker (single
power), to protect against backfeeding voltage to input terminal through the static bypass circuit. Namely, before operating
the circuit, isolate the UPS firstly, and then check the dangerous voltage between the ports, and that between the ports and
earth.
Maintainable components
1. All internal maintenance and servicing procedures of the equipment should be carried out only by trained personnel.
Components behind the protective cover which can only be removed by using a tool are restricted to service personnel.
2. The UPS meets the safety requirements completely in operator access area. Only service personnel can contact with the
hazardous voltage inside the UPS. However, the risk of contacting these voltages is minimized because the components
with hazardous voltage may be contacted only by using a tool to remove the protective cover. No risk will exist if you follow
the general norms and in accordance with the procedures recommended in this manual on equipment operation.
Warning: battery high voltage
1. All the physical service and maintenance of the battery are performed by the trained technicians.
2. Operation on the battery will result in electric shock and high short-circuit current, therefore, before operating the battery,
the following should be observed:
Remove the watches, rings and other metal objects.
Use the tools with insulation handle.
Weare rubber glove and shoes.
Avoid to place the tools and metal objects on the battery surface.
Cut off the charge power supply before connecting or disconnecting the battery terminals.
Check whether the battery is earthed accidently, if yes, please disconnect the earthing. Contacting any earth battery
parts will result in electric shock. Therefore, make sure that the battery is not earthed during installation and
maintenance.
3. Battery manufacturers provide the details of the precautions to be observed when working on, or in the vicinity of the
batterys. These precautions should be followed implicitly at all times. Attention should be paid to the recommendations
concerning local environmental conditions and the provision of protective clothing, first aid and fire-fighting facilities.

Contents
Chapter 1 Product Introduction ........................................................................................................................................... 1
1.1 Features................................................................................................................................................................ 1
1.2 Model Configurations ............................................................................................................................................ 1
1.3 Appearance And Components.............................................................................................................................. 2
1.3.1 Appearance ............................................................................................................................................... 2
1.3.2 Components .............................................................................................................................................. 2
1.4 Operating Principle ............................................................................................................................................... 3
1.5 UPS State And Operation Mode ........................................................................................................................... 3
1.5.1 Normal Mode ............................................................................................................................................. 4
1.5.2 Bypass Mode............................................................................................................................................. 4
1.5.3 Battery Mode ............................................................................................................................................. 5
1.5.4 ECO Mode (For Single UPS System Only)................................................................................................ 5
1.5.5 Fault State ................................................................................................................................................. 5
1.5.6 Maintenance Bypass Mode ....................................................................................................................... 5
1.6 Specifications........................................................................................................................................................ 5
Chapter 2 Single UPS Installation And Commissioning ...................................................................................................... 7
2.1 Unpacking Inspection............................................................................................................................................ 7
2.2 Installation Preparation ......................................................................................................................................... 7
2.2.1 Location ..................................................................................................................................................... 7
2.2.2 Environmental Requirement ...................................................................................................................... 7
2.2.3 Installation Tools........................................................................................................................................ 9
2.3 External Protective Devices .................................................................................................................................. 9
2.3.1 Rectifier And Bypass Input ........................................................................................................................ 9
2.3.2 Battery Input ............................................................................................................................................ 10
2.3.3 UPS Output ............................................................................................................................................. 10
2.4 Mechanical Installation........................................................................................................................................ 10
2.4.1 Tower Installation .................................................................................................................................... 10
2.4.2 Rack Installation ...................................................................................................................................... 11
2.5 Connecting Power Cables .................................................................................................................................. 13
2.5.1 Connecting I/O Cables............................................................................................................................. 14
2.5.2 Connecting Battery Cables ...................................................................................................................... 20
2.6 Single UPS Commissioning ................................................................................................................................ 23
2.6.1 Check Before Start-Up............................................................................................................................. 23
2.6.2 Single UPS Parameters Setting............................................................................................................... 23
2.6.3 Normal Mode Start-Up............................................................................................................................. 26
2.6.4 Battery Mode Start-Up............................................................................................................................. 26

Chapter 3 Parallel UPS Installation And Commissioning .................................................................................................. 27
3.1 Features.............................................................................................................................................................. 27
3.2 Requirements ..................................................................................................................................................... 27
3.3 Mechanical Installation........................................................................................................................................ 27
3.4 Connecting Power Cables .................................................................................................................................. 28
3.4.1 Connecting I/O Cables............................................................................................................................. 28
3.4.2 Connecting Parallel Cables ..................................................................................................................... 29
3.4.3 Connecting Battery Cables ...................................................................................................................... 31
3.5 Commissioning Parallel System.......................................................................................................................... 33
3.5.1 Check Before Start-Up............................................................................................................................. 33
3.5.2 Parallel System Parameters Setting ........................................................................................................ 33
3.5.3 Power-On Commissioning For Parallel System....................................................................................... 34
3.6 Installation And Commissioning For Double Bus System ................................................................................... 35
3.6.1 Introduction.............................................................................................................................................. 35
3.6.2 Installing External Protective Device ....................................................................................................... 36
3.6.3 Connecting Power Cables ....................................................................................................................... 36
3.6.4 Connecting LBS Cables........................................................................................................................... 36
3.6.5 Setting Parameters Of Double Bus System............................................................................................. 37
Chapter 4 Operation And Display Panel ........................................................................................................................... 39
4.1 Introduction ......................................................................................................................................................... 39
4.1.1 LED Indicators ......................................................................................................................................... 39
4.1.2 Audible Alarm (Buzzer)............................................................................................................................ 39
4.1.3 Control Buttons........................................................................................................................................ 40
4.1.4 LCD And Menu Buttons ........................................................................................................................... 40
4.2 LCD Screen Types.............................................................................................................................................. 40
4.2.1 Start Screen............................................................................................................................................. 40
4.2.2 Primary Screen........................................................................................................................................ 41
4.2.3 Default Screen......................................................................................................................................... 41
4.3 Detailed Description Of Menus ........................................................................................................................... 42
4.4 Prompt Window................................................................................................................................................... 43
4.5 UPS Alarm Message List .................................................................................................................................... 44
Chapter 5 UPS Operation Instructions .............................................................................................................................. 47
5.1 UPS Start-Up ...................................................................................................................................................... 47
5.2 Transfer Procedures Between Operation Modes ................................................................................................ 47
5.2.1 Transfer From Normal Mode To Battery Mode ........................................................................................ 47
5.2.2 Transfer From Inverter Mode To Bypass Mode ....................................................................................... 47
5.2.3 Transfer From Bypass Mode To Inverter Mode ....................................................................................... 47
5.2.4 Transfer From Inverter Mode To Maintenance Bypass Mode.................................................................. 48
5.2.5 Transfer From Maintenance Bypass Mode To Inverter Mode.................................................................. 48
5.3 UPS Complete Shutdown ................................................................................................................................... 48

5.4 EPO .................................................................................................................................................................... 49
5.5 Auto Restart........................................................................................................................................................ 49
5.6 UPS Reset .......................................................................................................................................................... 49
5.7 Language Selection ............................................................................................................................................ 50
5.8 Changing Current Date And Time....................................................................................................................... 50
5.9 Control Password................................................................................................................................................ 50
Chapter 6 Communication................................................................................................................................................. 51
6.1 Installing Intelligent Card..................................................................................................................................... 51
6.1.1 Intelligent Card Port................................................................................................................................. 51
6.1.2 Intelligent Card Option ............................................................................................................................. 51
6.2 Connection Cables For Dry Contact Port............................................................................................................ 52
6.3 Connecting USB Communication Cables ........................................................................................................... 53
Chapter 7 Maintenance ..................................................................................................................................................... 54
7.1 Fan Maintenance ................................................................................................................................................ 54
7.2 Battery Maintenance ........................................................................................................................................... 54
7.3 Cleaning UPS ..................................................................................................................................................... 55
7.4 Checking UPS State ........................................................................................................................................... 55
7.5 Checking UPS Functions .................................................................................................................................... 55
Chapter 8 Options ............................................................................................................................................................. 56
8.1 Option List........................................................................................................................................................... 56
8.2 Battery Module.................................................................................................................................................... 56
8.2.1 List Of Battery Module Options................................................................................................................ 56
8.2.2 Appearance Of Battery Module ............................................................................................................... 57
8.2.3 Backup Time Of Standard Battery Module For Single UPS.....................................................................57
8.3 POD .................................................................................................................................................................... 58
8.4 Communication Cables....................................................................................................................................... 60
8.5 Guide Rail ........................................................................................................................................................... 60
8.6 Double Bus Parts ................................................................................................................................................ 60
8.7 Battery Cabinet ................................................................................................................................................... 61
8.8 Communication Options And Monitoring Options ............................................................................................... 62

Chapter 1 Product Introduction 1
Liebert®ITA 16kVA And 20kVA UPS User Manual
Chapter 1 Product Introduction
Liebert®ITA 16kVA and 20kVA UPS (UPS for short) is an intelligent online UPS system with sine wave output
developed by Emerson Network Power Co., Ltd. The UPS offers reliable and high quality AC power to the precision
instrument.
The UPS adopts modular design, and rack/tower installation can be used depending on your requirements. It is
applicable to supplying AC power to small scale computer center, network, communication system, automatic control
system and precision instrument.
This chapter introduces the features, model configurations, appearance and components, operating principle, UPS
state and operation mode, and specifications of the UPS.
1.1 Features
The UPS features include:
Compatible with two modes: 3-phase mains output and single-phase mains output. You should check the
system wiring and conduct the panel setting manually
Capable of parallel connection to achieve up to 3 + 1 parallel redundant power
High-frequency double conversion topology structure, with high input power factor, wide input voltage range, and
output immune to grid interference, thus adaptable to areas with unstable mains supply
High power density
Full digital control technology based on digital signal processor (DSP) to achieve high system reliability with
self-protection and fault diagnosis functions
Intelligent battery management to extend the battery module life
Operation and display panel with both LCD and LED indication to help you learn about the UPS operation state
and operating parameters
3U thickness. Tower installation and rack installation are optional to meet different installation requirements
Capable of ECO power supply mode, which helps you save energy to the maximum extent
Flexible network management with Emerson monitoring software
Fan fault self-test and automatic recognition functions
SNMP card optional, providing network communication function
Capable of connecting multiple battery strings, extending the power supply time of battery mode
1.2 Model Configurations
Two types are available for Liebert®ITA 16kVA and 20kVA UPS: UHA3R-0160L, UHA3R-0200L. The model
configurations are shown in Table 1-1.
Table 1-1 Model configurations
Model Type Description
Long back-up model UHA3R-0160L
Long back-up model UHA3R-0200L
For single UPS system, four battery modules can be configured. For 1 + 1
parallel system and above 1 + 1 parallel system, the external battery cabinet
with big capacity is recommended

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Liebert®ITA 16kVA And 20kVA UPS User Manual
1.3 Appearance And Components
1.3.1 Appearance
The UPS appearance is shown in Figure 1-1.
Figure 1-1 UPS appearance
1.3.2 Components
Front panel
As shown in Figure 1-2, the UPS front panel provides ventilation holes, operation and display panel, LED indicators,
DIP switch and battery cold start button.
Ventilation hole Operation and display panel
LED indicator
DIP switch and battery
cold start button (with
protective cover)
Figure 1-2 UPS front panel
Rear panel
As shown in Figure 1-3, the UPS rear panel provides parallel ports, LBS ports, I/O terminal block, intelligent card port,
dry contact ports, USB port and ventilation holes. The SIC-SNMP card in the intelligent card port is optional, purchase
it if you need to use.
Parallel port LBS port
Dry contact port USB port Ventilation hole
I/O terminal block (With protective cover)
Intelligent card
port (with
protective
cover)
Figure 1-3 UPS rear panel
Note
Non-authorized personnel are prohibited from opening the UPS chassis cover.

Chapter 1 Product Introduction 3
Liebert®ITA 16kVA And 20kVA UPS User Manual
1.4 Operating Principle
The operating principle of the UPS is shown in Figure 1-4.
Input filter
Rectifier
/PFC
Inverter
DSP
controller
Bypass
Main input
Bypass input
Output filter Output
Battery Charger
Auxiliary
power
Figure 1-4 UPS operating principle
1. The UPS is composed of mains input (main and bypass), I/O filter, rectifier/PFC, charger, inverter, bypass, battery,
DSP controller, auxiliary power and UPS output.
2. When the mains is normal, the rectifier will start, and the charger will charge the battery string. Before turning on
the UPS, the output voltage is the bypass voltage, and the mains supplies power to the load through the bypass. After
turning on the UPS, the electronic transfer switch connects the inverter output to the load, and the mains supplies DC
power to the inverter through the rectifier/PFC circuit. The inverter then converts DC power into pure sine wave AC
power, and supplies the AC power to the load through the electronic transfer switch.
3. When the mains is abnormal, the rectifier/PFC circuit boosts the battery voltage and supplies it to the inverter. The
inverter then converts it into pure sine wave AC power, and supplies the AC power to the load through the electronic
transfer switch.
4. After the mains returns to normal state, the UPS will automatically transfer from Battery mode to Normal mode, the
mains supplies DC power to the inverter through the rectifier/PFC circuit, and then the electronic transfer switch
supplies AC power to the load.
1.5 UPS State And Operation Mode
The UPS state and operation mode include: Normal mode, Bypass mode, Battery mode, ECO mode, Fault state and
Maintenance Bypass mode. The operation schematic diagrams of Normal mode, Bypass mode, Battery mode and
Maintenance Bypass mode are shown in Figure 1-5.
Note
Only when the UPS output power distribution unit (POD for short) is configured, the Maintenance Bypass mode is valid.

4 Chapter 1 Product Introduction
Liebert®ITA 16kVA And 20kVA UPS User Manual
Normal mode Battery mode
Bypass mode Maintenance Bypass mode
Figure 1-5 Operation schematic diagram
For the LED indicators introduced in this section, refer to 4.1.1 LED Indicators.
1.5.1 Normal Mode
When the mains input is normal, the load is supplied with voltage-stabilizing and frequency-stabilizing power by the
mains after processing of the rectifier and the inverter, and meanwhile, the charger is charging the battery. The
operation mode is Normal mode.
In Normal mode, the inverter indicators are on (green).
1.5.2 Bypass Mode
If the overload overtime, inverter or rectifier failure appears during the UPS operation in Normal mode, the UPS will
transfer to Bypass mode, that is, the load is powered by the bypass source, which comes directly from the mains
input. If the rectifier is normal, the internal charger will charge the battery.
In Bypass mode, the inverter indicators are off.

Chapter 1 Product Introduction 5
Liebert®ITA 16kVA And 20kVA UPS User Manual
Note
In case of mains failure or mains voltage out of range in Bypass mode, the UPS will shut down and stop the output.
1.5.3 Battery Mode
Upon mains failure or voltage out of range, the rectifier and internal charger will stop running, and the battery will
supply power to the load through the inverter. The inverter indicators are on together with buzzer alarming, which
notifies you that the UPS is in Battery mode.
Note
1. The battery has been fully charged before delivery. However, transportation and storage will inevitably cause some capacity
loss. Therefore, it is required to charge the battery for eight hours before putting the UPS into operation for the first time, to
ensure the adequate backup time for battery.
2. The battery cold start can also be used to start the UPS from the Battery (charged) mode upon mains failure. Therefore, the
battery power can be used independently for improving the system availability to some extent.
1.5.4 ECO Mode (For Single UPS System Only)
In ECO mode, the load is powered by bypass when the bypass voltage is normal, and the load is powered by inverter
when the bypass voltage is abnormal. ECO mode is an energy-saving operation mode. For power equipment
insensitive to power grid quality, you can use the ECO mode for power supply through bypass to reduce the power
loss.
Note
1. In ECO mode, if the bypass failure or abnormal bypass voltage appears when the output is not overloaded, the UPS will
transfer to Normal mode. However, if the bypass failure or abnormal bypass voltage appears when the output is overloaded, the
UPS will not transfer to Normal mode, but shut down the bypass.
2. In ECO mode, the efficiency of the UPS is up to 98%.
1.5.5 Fault State
In Normal mode, the UPS will transfer to Bypass mode if the inverter failure or UPS overtemperature appears. In
Battery mode (with no bypass mains), the UPS will shut down and stop the output if the inverter failure or UPS
overtemperature appears. In Fault state, the fault indicators will turn on, the buzzer will keep beeping, and the
corresponding fault information will be displayed on LCD.
1.5.6 Maintenance Bypass Mode
If maintenance and repair for UPS are needed, you can switch the load to the Maintenance Bypass through
maintenance bypass MCB, and the power to the load is not interrupted. The maintenance bypass MCB is located on
the front panel of the POD, and the capacity meets the requirements of total load capacities. Refer to Liebert®ITA
16kVA And 20kVA UPS Power Output Distribution Unit User Manual for the detailed introductions of the POD.
Note
When the UPS has malfunctions and can not working normally, please get in touch with the nearest Emerson branch office or
local service center. It is prohibited to repaire the UPS by yourself, otherwise the personnel injury and damage to the equipment
will occur.
1.6 Specifications
The specifications are listed in Table 1-2.

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Liebert®ITA 16kVA And 20kVA UPS User Manual
Table 1-2 Specifications
Specifications
Item UHA3R-0160L UHA3R-0200L
Rated voltage 380Vac/400Vac/415Vac
Voltage range
304Vac ~ 478Vac, at full load
228Vac ~ 304Vac, linear derating
228Vac, at half load
Rated frequency 50Hz/60Hz
Frequency range 40Hz ~ 70Hz
Input
Power factor ≥0.99, at full load; ≥0.98, at half load
Rated power 14.4kW 18kW
Voltage 3-in 3-out: 220Vac ± 1%, 3-phase balance load
3-in 1-out: 220Vac ± 1%
Frequency
synchronization range Rated frequency ±2Hz. Configurable range: ±0.5Hz ~ ±3Hz
Frequency track rate 1Hz/s. Configurable range: 0.1Hz/s ~ 3Hz/s (single UPS), 0.2Hz/s (parallel system)
Rated power factor 0.9
Crest factor 3:1
Voltage harmonic
distortion < 2% (linear load); < 5% (non-linear load)
Dynamic response
recovery time 60ms
Overload capacity At 25°C: 105% ~ 125%, 5min
125% ~ 150%, 1min
Bypass voltage Upper limit: +10%, +15% or +20%; default: +15%
Lower limit: -10%, -20%, -30% or -40%; default: -20%
Output
Mains efficiency > 93%, up to 94%
Type Sealed, lead-acid, maintenance-free battery
Cell No. 30, 32, 34, 36, 38, 40; default: 32
Rated voltage 360Vdc ~ 480Vdc
Battery
Charge power
4.5kW, 0°C ~ 30°C
4.05kW, 30°C ~ 35°C
3.6kW, 35°C ~ 40°C
Adjust automatically according to the ambient temperature
Mains←→Battery 0ms
Transfer time Inverter←→Bypass
Synchronous transfer: ≤1ms
Asynchronous transfer (default): ≤20ms
Or 40ms, 60ms, 80ms and 100ms are available
Noise ≤58dB
Panel display mode LED and LCD
Safety IEC/EN62040-1-1
Conduction emission IEC/EN62040-2
Immunity I ≤16A, IEC/EN61000-3-3; 16A < I ≤75A, IEC/EN61000-3-11
EMC
Harmonic current I ≤16A, IEC/EN61000-3-2; 16A < I ≤75A, IEC/EN61000-3-12;
YD/T1095-2001, level 2, 15%
Surge protection IEC/EN-61000-4-5, endurance level 4 (4kV) (live line to earth), level 3 (2kV) (during
live lines)
Protection level IP20
Operating temperature 0°C ~ 40°C
Storage temperature -40°C ~ +70°C (battery excluded); -20°C ~ +55°C (battery included)
Relative humidity 5%RH ~ 95%RH, non-condensing
Ambient
condition
Altitude < 2000m; derating according to GB/T3859.2 when higher than 2000m
Size W × H × D 435mm × 130mm × 750mm
Net weight 35kg
Weight Gross weight 57kg

Chapter 2 Single UPS Installation And Commissioning 7
Liebert®ITA 16kVA And 20kVA UPS User Manual
Chapter 2 Single UPS Installation And Commissioning
This chapter introduces the installation, cable connection and commissioning of the single UPS.
Each site has its peculiarity, so this chapter provides the guidance with general installation procedures and methods
for the installation engineer who should conduct the installation according to the actual conditions.
Warning: professional installation
The UPS should be installed by a qualified engineer according to the information contained in this chapter. If any problem is
found, please get in touch with Emerson local service center immediately.
The UPS shall not be powered on without approval of the commissioning engineer.
For other equipment which is not introduced in this manual, the detailed information about mechanical installation and electrical
installation are delivered with the equipment.
Note: 3-phase 5-line for power input
The UPS can be connected to 3-phase 5-line (A, B, C, N, PE) TN, TT and IT AC power distribution system (IEC60364-3).
2.1 Unpacking Inspection
After the UPS arrival, you should unpack it and check the following items:
1. Visually inspect the UPS appearance for transportation damage. If any problem is found, please notify the carrier
immediately.
2. Check the accessories and models against the delivery list. If any problem is found, please notify the dealer
immediately.
2.2 Installation Preparation
2.2.1 Location
To extend the UPS life, the chosen place must offer:
Convenient wiring
Adequate operator access area
Good ventilation to meet the heat dissipation requirements
No corrosive gas, such as sulfur dioxide and so on
No excessive moisture or heat source
No excessive dust
Compliance with fire-fighting requirements
Operating temperature compliant with the specifications, see Table 1-2 for details
2.2.2 Environmental Requirement
UPS room
The UPS is designed for indoor installation, which should be installed in a clean and well-ventilated environment, to
keep the ambient temperature within the specifications.
The internal fans provide forced air cooling for the UPS. Cooling air enters the UPS through the ventilation holes on
the front panel, and exhausts the hot air through the back ventilation holes. Therefore, do not obstruct the ventilation
holes. Maintain at least 200mm clearances between the front, rear, side panels of the UPS and the wall or adjacent

8 Chapter 2 Single UPS Installation And Commissioning
Liebert®ITA 16kVA And 20kVA UPS User Manual
equipment (see Figure 2-1), to avoid obstructing the UPS ventilation and heat dissipation. Otherwise, the UPS
internal temperature will rise, which will shorten the UPS life.
If necessary, an indoor exhaust fan should be installed to keep the indoor temperature from rising. An air filter should
be used in a dusty environment where the UPS is to be operated.
General view
500mm
200mm
Cabinet
Wall
200mm
Cabinet
Wall
Topview Frontview
Figure 2-1 Installation clearances
Note
1. The UPS should be installed only on the concrete surface or other non-flammable surfaces.
2. As shown in Figure 2-1 (top view), the demonstration of the clearance between the rear panel of the cabinet and the wall is
500mm. The clearance should not be less than 200mm, it needs to be considered according to the actaul situation for the sake of
maintenance convenience.
Battery room
A small amount of hydrogen and oxygen will be generated at the end of battery charging, therefore, you must ensure
that the fresh air ventilation of battery installation environment meets the EN50272-2001 requirements.
The battery ambient temperature should keep constant, for the ambient temperature is the main factor to affect the
battery capacity and life. The battery standard operating temperature is 20°C, operation above this temperature will
shorten the battery life, and operation below this temperature will reduce the battery capacity. If the battery average
temperature in operation rises from 20°C to 30°C, the battery life will be reduced by 50%; if the battery temperature in
operation exceeds 40°C, the battery life will be decreased exponentially. In general, the allowed ambient temperature
of the battery is 15°C ~ 25°C. The battery should be kept away from heat and ventilation holes.

Chapter 2 Single UPS Installation And Commissioning 9
Liebert®ITA 16kVA And 20kVA UPS User Manual
When the UPS uses an external battery, you must install a battery protective device (such as fuse or circuit breaker)
in areas near the battery, and use the shortest wiring distance for the connection between the protective device and
the battery.
Storage environment
When the UPS does not need to be installed immediately, the UPS must be stored indoors to be protected from the
excessive moisture or overtemperature environment. The battery requires dry and low temperature, well-ventilated
environment for storage, and the most suitable storage temperature is 20°C ~ 25°C.
Warning: battery hazards
During the battery storage, the battery must be periodically charged according to the battery instructions. When charging the
battery, you can connect the UPS to the mains temporarily to charge and activate the battery.
2.2.3 Installation Tools
Prepare installation tools according to Table 2-1. The tools must be insulated and ESD-proof processed prior to use.
Table 2-1 Installation tools list
Installation tool Specification Application
Cross screwdriver EJ5100mm Remove the screws of the top protective cover of the UPS, or open
the chassis
Slotted screwdriver EJ375mm Connect I/O cables
Wire-pressure plier YT-12 Press wires for I/O terminal block
Diagonal plier MTC3C Make I/O cables
2.3 External Protective Devices
The circuit breaker or other protective devices must be installed at the external AC input end of the UPS. This section
provides the general guidance for qualified installation engineer. The qualified installation engineer should learn about
the local wiring regulations and other related information.
2.3.1 Rectifier And Bypass Input
Overcurrent
The appropriate overcurrent protective device should be installed on the mains input power distribution, and the
current capacity of power cable and the system overload requirements should be taken into account in installation
(see Table 2-2). It is recommended to use the thermomagnetic circuit breaker which satisfies with IEC60947-2
tripping curve C (normal) when the current value reaches 125% of the current value listed in Table 2-2.
Split-bypass
When the system uses split-bypass, separate protective devices should be installed for the mains and bypass at the
mains input power distribution.
Main/Bypass backfeed protection
When using the main/bypass backfeed protection function, you need to install a protective device with auxiliary
contact function at the user’s gross mains input air breaker (including the main input and bypass input), and this
auxiliary contact signal should be connected to the dry contact port of the system. The recommended model for the
air breaker is S1N125 R125 TM FFC 4P + 1A + 1B + YO (220Vac).
Note
1. The same neutral line must be used for the rectifier and bypass input power.
2. For IT power grid system, the quadrupole protective device must be installed at the UPS external I/O power distribution.
Earth leakage current
The residual current detector (RCD) for the UPS upstream input power distribution should be:

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Sensitive to the DC unidirectional pulse (level A) in power distribution network
Insensitive to the transient current pulse
General sensitivity type, settable: 0.3A ~ 1A
The residual current circuit breaker (RCCB) must be sensitive to the DC unidirectional pulse (level A) in power
distribution network, but insensitive to the transient current pulse, as shown in Figure 2-2 respectively.
Figure 2-2 RCCB symbols
When using the earth RCD in split-bypass system or parallel system, the RCD should be located at the upstream
input power distribution end to avoid generating the false alarm.
The earth leakage current fed by the RFI filter in the UPS ranges from 3.5mA to 1000mA. It is recommended to
confirm the sensitivity of each differential device of the upstream input power distribution and downstream power
distribution (to load).
2.3.2 Battery Input
If the battery module option is provided by Emerson, the battery module has a built-in overcurrent protective device.
Otherwise, the external battery cabinet should provide DC compatible circuit breaker to provide the overcurrent
protection for the UPS and its batteries.
2.3.3 UPS Output
The protective device must be installed for the UPS output power distribution. The protective device must be different
from the input power distribution protection air breaker, and provide the overload protection (see Table 2-4).
2.4 Mechanical Installation
Two installation modes are available: tower installation and rack installation. You can select an appropriate installation
mode according to the actual conditions.
2.4.1 Tower Installation
1. Take out the support bases from the accessories, assemble a pair of support bases and a support base extension
(accessory) together through the fastenings, as shown in Figure 2-3, and put them onto the flat installation table.
Support base extension
Support base
Support base
Fastening
Figure 2-3 Connecting the support base with support base extension
2. If battery module installation is necessary, take out other support base extensions delivered with the battery
module, and then assemble the support base extensions and the support bases through the fastenings, as shown in
Figure 2-4.

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Support base
Support base extension
Fastening
Figure 2-4 Connecting the support base with support base extension
3. Place the UPS on the support bases and support base extensions, as shown in Figure 2-5.
UPS
Support base
Support base
UPS
Battery
module (4 pcs)
Support
base
Support
base
Figure 2-5 UPS and battery module Installation complete
2.4.2 Rack Installation
Installation procedures for UPS
1. Use eight M4 × 10 screws to fix two brackets (accessories) respectively on both sides of the UPS front panel, as
shown in Figure 2-6.
Figure 2-6 Installing brackets
Note
It is prohibited to move the UPS through the brackets.
2. Install the guide rails.
You need to use guide rails when you select Liebert®ITA series UPS and its options, and select the rack installation.
The installation procedures of the guide rails are as follows:
1) Take out the guide rails (one left guide rail and one right guide rail), guide rail screws and panel screws from the
package, distinguish the left guide rail and right guide rail according to Figure 2-7, and confirm its retractable function
respectively.

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Installation
hole (6 pcs)
Left guide rail Right guide rail
Figure 2-7 Appearance of the guide rail
Distinguish the guide rail screw and the panel screw according to Figure 2-8.
Guide rail screw Panel screw
Figure 2-8 Appearance of the screw
2) Adjust the length of the guide rail according to the dimensions of the rack.
3) Align the installation holes of the guide rail with the square holes of the rack, fix the guide rail onto the rack through
the guide rail screws (a total of eight), each left guide rail and right guide rail need four guide rail screws, as shown in
Figure 2-9.
Guide rail screw (4 pcs)
Guide rail
Guide rail holder
Square hole
Figure 2-9 Installing the guide rail
Note
1. The guide rail holder must be close to the front of the rack.
2. Any end of one guide rail has six installation holes (see Figure 2-7), do not use the two installation holes in the middle when
fixing the guide rail. It is recommended to use the top and bottom installation hole (from top to bottom, installation hole 1 and
installation hole 6).
The guide rail installation is finished, as shown in Figure 2-10.
Figure 2-10 guide rail installation complete