Vertiv Liebert XDC User manual

Vertiv™ Liebert® XDC
High Heat Density
Precision Air Conditioner
User Manual

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If you encounter any installation or operational issues with your product, check the pertinent
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Vertiv™ | Liebert® XDC | User Manual
Vertiv™ | Liebert® XDC | User Manual
Product BOM Version Date Revision
XDC 31014396 1.0 17-06-2021 R1
XDC 31014396 1.0 29-01-2021 R0

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Vertiv™ Liebert® XDC IUser Manual
Table of Contents
1 Overview...................................................................................................................................................................................................................................1
1.1. Product Introduction................................................................................................................................................................................................. 1
1.1.1. Energy Saving......................................................................................................................................................................................................1
1.1.2. Diversified Terminal Types....................................................................................................................................................................2
1.2. Model Nomenclature ..............................................................................................................................................................................................4
1.3. Product Appearance ............................................................................................................................................................................................... 5
1.4. Main Components..................................................................................................................................................................................................... 5
1.4.1. Compressor..........................................................................................................................................................................................................5
1.4.2. Sight Glass...........................................................................................................................................................................................................6
1.4.3. Color Display Screen..................................................................................................................................................................................6
1.4.4. Safety Control Device...............................................................................................................................................................................7
1.4.5. Oil Separator ......................................................................................................................................................................................................7
1.4.6. Remote Monitoring Software.............................................................................................................................................................7
1.4.7. Outdoor Unit.......................................................................................................................................................................................................7
1.5. Refrigerant Requirements...................................................................................................................................................................................7
1.6. Environmental Requirements.........................................................................................................................................................................8
1.6.1. Operating Environment............................................................................................................................................................................8
1.6.2. Storage Environment.................................................................................................................................................................................8
2 Mechanical Installation...........................................................................................................................................................................................9
2.1. Equipment Room Requirements..................................................................................................................................................................9
2.2. Maintenance Space Requirements..........................................................................................................................................................9
2.3. Unpacking and Inspection..............................................................................................................................................................................10
2.3.1. Transportation and Handling..........................................................................................................................................................10
2.3.2. Unpacking..........................................................................................................................................................................................................11
2.4. Inspection .......................................................................................................................................................................................................................12
2.5. Installation Notes.....................................................................................................................................................................................................12

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Vertiv™ Liebert® XDC IUser Manual
2.6. System Installation Layout.............................................................................................................................................................................13
2.6.1. Overall System Layout............................................................................................................................................................................13
2.6.2. System Installation Diagram........................................................................................................................................................... 14
2.7. Installation of the Unit..........................................................................................................................................................................................15
2.7.1. Mechanical Parameters .........................................................................................................................................................................15
2.7.2. Leveling the Cabinet............................................................................................................................................................................... 16
2.7.3. Removing Leveling Feet and Fixing Cabinet....................................................................................................................17
2.7.4. Parallel Connecting Cabinets......................................................................................................................................................... 19
2.8. Unit Piping Installation ......................................................................................................................................................................................20
2.8.1. Connecting Refrigeration Piping................................................................................................................................................20
2.8.2. Dimension Refrigerant Piping.......................................................................................................................................................22
2.8.3. Branch Manifold..........................................................................................................................................................................................24
2.8.4. Connecting Refrigerant Piping....................................................................................................................................................25
2.8.5. Air Tightness Test ....................................................................................................................................................................................26
2.8.6. Charging Refrigerant Oil.....................................................................................................................................................................26
2.9. Remove Transportation Fixing Plate of Compressor...........................................................................................................28
2.10. Mechanical Installation Checklist.........................................................................................................................................................29
3 Electrical Installation.............................................................................................................................................................................................30
3.1. Installation Tasks and Cautions .................................................................................................................................................................30
3.1.1. Cabling Connection at the Site......................................................................................................................................................30
3.1.2. Installation Notes.......................................................................................................................................................................................30
3.2. Cabling of the Unit..................................................................................................................................................................................................31
3.2.1. Electrical Interface Location of the Unit................................................................................................................................31
3.2.2. Connection of Unit Power Supply Cables .........................................................................................................................32
3.3. Control Cables Connections........................................................................................................................................................................33
3.4. Electrical Inspection Checklist..................................................................................................................................................................35

Vertiv™ Liebert® XDC IUser Manual
4 System Startup and Commissioning....................................................................................................................................................36
4.1. Startup and Commissioning..........................................................................................................................................................................36
4.1.1. Preparation Before Commissioning.......................................................................................................................................... 36
4.1.2. Vacuuming....................................................................................................................................................................................................... 36
4.2. MCB Position...............................................................................................................................................................................................................37
4.3. Static Refrigerant Charge................................................................................................................................................................................37
4.4. Dynamic Refrigerant Charging ..................................................................................................................................................................37
4.5. Commissioning Inspection Checklist..................................................................................................................................................38
5 Color Display Screen Operating Instructions.............................................................................................................................39
5.1. Features.............................................................................................................................................................................................................................39
5.2. Appearance..................................................................................................................................................................................................................39
5.3. Color Screen Interface ...................................................................................................................................................................................... 40
5.3.1. Startup Interface.........................................................................................................................................................................................40
5.3.2. Main Interface of the Color Screen..........................................................................................................................................40
5.3.3. Operation Example ..................................................................................................................................................................................42
5.4. Other Interfaces.......................................................................................................................................................................................................43
5.4.1. Alarm Status................................................................................................................................................................................................... 43
5.4.2. Main Unit Menu..........................................................................................................................................................................................44
5.4.3. Terminal Menu............................................................................................................................................................................................ 45
5.4.4. Run Time..........................................................................................................................................................................................................46
5.4.5. About.....................................................................................................................................................................................................................47
6 System Operation and Maintenance....................................................................................................................................................48
6.1. Routine Maintenance Inspection (Monthly) .................................................................................................................................48
6.2. Routine Maintenance Inspection (Semi-annual) ....................................................................................................................49
6.3. System Troubleshooting Test....................................................................................................................................................................50
6.4. Electrical Connection Inspection............................................................................................................................................................50
6.4.1. Electrical Maintenance........................................................................................................................................................................50

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Vertiv™ Liebert® XDC IUser Manual
6.4.2. Control Maintenance............................................................................................................................................................................50
6.5. Cooling System..........................................................................................................................................................................................................51
6.5.1. Suction Pressure..........................................................................................................................................................................................51
6.5.2. Exhaust Pressure .......................................................................................................................................................................................51
6.6. Terminal Electronic Expansion Valve...................................................................................................................................................51
6.7. Terminal Fan.................................................................................................................................................................................................................52
6.8. Air-cooled Condenser........................................................................................................................................................................................ 52
6.9. Compressor..................................................................................................................................................................................................................52
6.10. Mechanical Failure..............................................................................................................................................................................................53
6.11. Electrical Failure.....................................................................................................................................................................................................53
7 Troubleshooting..........................................................................................................................................................................................................54
Appendix I: Circuit Diagram of Vertiv™ Liebert® XDC ...........................................................................................................57
Appendix II: Alarm Output Menu...................................................................................................................................................................58
Appendix III: Hazardous Substance Content...................................................................................................................................59
Appendix IV: List of Maintenance Inspection Items (Semi-annual)........................................................................60
Appendix V: Toxic and Hazardous Substances or Elements..........................................................................................61

Overview1
1 Overview
This chapter introduces the product description, model description, product appearance and main components of
Vertiv™Liebert® XDC High Heat Density Precision Air Conditioner (hereafter referred as Liebert XDC). The Liebert XDC is
a specially engineered equipment for the applications which does not permit any unauthorized and unqualified access in
the system. It must be used only by professionally trained personnel if it is placed in shopping malls, light industry, or any
business environment.
1.1. Product Introduction
The Liebert XDC main unit is a large, multi-connected precision environmental control equipment, suitable for the
environment control of medium and large computer rooms, modular computer rooms and similar ecosystem that also calls
for energy-saving, high heat density and reliability requirements. It is specifically designed to ensure precision equipment
such as sensitive equipment, industrial process equipment, communication equipment and computers have a reasonable
and safe operating environment.
Liebert XDC is highly eective and eicient in solving the problem of heat dissipation in server rooms with high heat density,
and it is installed where cooling load changes drastically.
It is also configured with Vertiv™ Liebert® XD multi-connected air conditioners with the following features
1.1.1. Energy Saving
The Liebert XDC main unit adopts a high-eiciency variable capacity compressor, and Liebert XD terminal adopts high-
eiciency EC fan, high-precision electronic expansion valve control device. The Liebert XD terminal has three types:
Vertiv™ Liebert® XDH, Vertiv™ Liebert® XDV, and Vertiv™ Liebert® XDO, which can be flexibly selected for dierent
application environments. It is placed close to the server, reducing the air supply distance; improving eiciency and energy
saving.
The unit provides real-time compressor operating status, terminal operating status, indoor ambient temperature, outdoor
ambient temperature, outdoor fan running status, etc., and also enable to adjust the status of each operating component of
the system in real time to make the system run in the most energy-saving state. The XD multi-connected air conditioning
system has a new PID optimization algorithm that significantly improves the energy eiciency ratio of the system under
dierent compressor outputs. The system energy eiciency comparison between Liebert XD multi-connected air
conditioner and traditional computer room air conditioner is shown in Figure 1-1.
Figure 1-1 System Optimization Algorithm Comparison

Vertiv™| Liebert® XDC | User Manual 2
1.1.2. Diversified Terminal Types
The Vertiv™ Liebert® XD terminal air conditioners are arranged close to the server, and the diversified layout can be applied
to dierent installation and use environments, as shown in Figure 1-2, Figure 1-3, and Figure 1-4.
Note: For the related contents of the Liebert XD terminal, please refer to the user manual of the respective terminal (for
example Vertiv™ Liebert® XDH, Vertiv™ Liebert® XDO, and Vertiv™ Liebert® XDV).
Figure 1-2 Liebert XDH Layout Diagram
Figure 1-3 Liebert XDO Layout Diagram

Overview3
Figure 1-4 Liebert XDV Layout Diagram
• Precision Control
Vertiv™ Liebert® XD air conditioner can accurately control temperature and humidity. The indoor temperature control range
is from 18 °C to 40 °C, the temperature adjustment accuracy can reach the setpoint of ±1 °C, and the temperature change
rate is less than 5 °C/hour. If the temperature fluctuation exceeds the limit, the system will send a remote alarm signal. The
indoor relative humidity control range is from 20% to 80% RH, and the control accuracy can reach the setpoint of ±5% RH.
• Convenient and Durable
Durable parts, compact structure, small overall sizes; unique structure design frame which is stable, strong and easy to
disassemble and can be easily handled under extreme conditions.
• Highly Eicient Refrigerant
In order to meet the international requirements, the unit uses R410A a highly eicient refrigerant.
• Multiple Protection
The built-in automatic alarm and diagnosis functions protect the air conditioner unit in all aspects, and can more eectively
prevent the occurrence of failures, can identify the fault location more quickly that eectively extend the service life of the
air conditioner unit.
• Easy to Maintain
Vertiv™ Liebert® XDC unit adopts a front door opening arrangement which helps in accessing all the live parts for the
maintenance from the front side, and also enable the compact footprint of the unit.

Vertiv™| Liebert® XDC | User Manual 4
1.2. Model Nomenclature
The Vertiv™ Liebert® XDC is defined by twelve digits, as represented in Table 1-1.
Table 1-1 Vertiv™ Liebert® XDC Nomenclature
1 2 3 4 5 6 7 8 9 10 11 12
X D C 1 3 0 R M 1 L A 1
Digit 1, 2 Product Model
XD X-treme High Density
Digit 3 Cooling System
C Compressor
P Pump
Digit 4, 5, 6 Cooling Capacity kW
0-9 130 kW
Digit 7 Redundancy
R Pump Redundancy
9 Dual Invert Compressor
Digit 8 Power Supply
M 380 V to 400 V, 3 Ph, 50 Hz
N 380 V to 415 V, 3 Ph, 50 / 60 Hz+N
Digit 9 Refrigerant
1 R410A
2 R134A
Digit 10 Installation Option
L In-row Installation
R Perimeter Installation
Digit 11 System Type
2 2 Way Water Valve
3 3 Way Water Valve
A Air-cooled
Digit 12 Order Identifier
1 With Dehum function (China XDP Only)
C China Version
A America Version
E EMEA
The standard components are represented in ‘Bold Italic’ font in

Overview5
1.3. Product Appearance
The appearance of Vertiv™ Liebert® XDC main unit is shown in Figure 1-5.
High Heat Density Main Unit Between Rows High Heat Density Main Unit in Room
Figure 1-5 Air Conditioner Appearance Drawing
1.4. Main Components
The Liebert XDC main unit mainly has a compressor, sight glass, safety control device, oil separator, compressor’s driver
color screen and other supporting components.
1.4.1. Compressor
The unit uses a high-eiciency variable capacity compressor, as shown in Figure 1-6. This compressor not only have
the characteristics of low vibration, low noise and high reliability, but also can automatically adjust the speed and output
dierence capabilities according to the changes in cooling requirements, which greatly improves the overall energy
eiciency of the system.
Figure 1-6 Variable Capacity Compressor

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1.4.2. Sight Glass
The unit is provided with a system cycle window that allows user to observe the state of the refrigerant and to determine
the moisture content of the system. When the moisture content of the system exceeds the standard, its background color
changes from green to yellow.
Figure 1-7 Sight Glass
1.4.3. Color Display Screen
Liebert XDC main unit is equipped with a 7-inch HMI color screen display configuration that has a simple user interface
and multi-level password protection which can eectively prevent the illegal operations. It has power-down self-recovery
function, and high/low voltage protection function. It can display the running status of set parameters of the components in
real time. Through the menu operation, you can accurately understand the running time of each key components.
The expert fault diagnosis system can automatically display the current fault, which helps maintenance personnel to
maintain the unit. It can store up to 1000 historical event records.
Figure 1-8 Color Display Screen

Overview7
1.4.4. Safety Control Device
Each Vertiv™ Liebert® XDC system is equipped with high-pressure protection, low-pressure protection and exhaust
temperature protection devices. When the compressor’s discharge pressure or discharge temperature is too high, an
emergency alarm is triggered and protection protocol is executed; when the compressor cannot work normally due to low
suction pressure, an alarm signal is triggered and protection protocol is executed.
1.4.5. Oil Separator
The unit uses a high-eiciency oil separator with oil separation eiciency of 90% or more, ensuring stable oil return from the
compressor.
1.4.6. Remote Monitoring Software
Liebert XDC air conditioner is provided with the standard industrial communication protocols such as Modbus RTU protocol
(default), RS485 interface, and computer to computer serial communication.
1.4.7. Outdoor Unit
For outdoor unit related information, please refer to Vertiv™Liebert® LVC Series Condenser User Manual.
1.5. Refrigerant Requirements
• Do not use inferior quality refrigerant as it can cause an extensive damage to the system.
• Vertiv does not undertake any responsibility for all the related consequences that result from using a
inferior quality refrigerant.

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1.6. Environmental Requirements
1.6.1. Operating Environment
The operating environment of the Vertiv™ Liebert® XDC main unit meets the requirements of GB4798.3-2007,
as shown in Table 1-2.
Table 1-2 Operating Environment Requirements
Items Requirements
Ambient temperature
Indoor 18 °C to 40 °C, RH<60%
Outdoor -15 °C to 45 °C (Please contact Vertiv when outdoor
temperature below -15 °C)
Main unit protection level IP20
Altitude <1000m, more than 1000m, please contact Vertiv Technology
Operating voltage range 380 V to 415 V (-10% to +6%) V, 3 N~, 50 Hz/60 Hz
Pollution level Level II
1.6.2. Storage Environment
The storage environment of the Liebert XDC main unit meets the requirements of GB4798.1-2005,
see Table 1-3 for details.
Table 1-3 Storage Environment Requirements
Items Requirements
Storage environment Indoor, clean (no dust)
Environment humidity <95%RH
Ambient temperature -25°C to +55°C
Storage time The total transportation and storage time does not exceed 6 months, and the
performance needs to be re-calibrated after 6 months

Mechanical Installation9
2 Mechanical Installation
This chapter introduces the mechanical installation of the Vertiv™ Vertiv™ Liebert® XDC main unit, including computer
room requirements, maintenance space requirements, equipment handling, unpacking, inspection, installation notes, system
installation layout, installation of unit piping and installation inspection, etc.
2.1. Equipment Room Requirements
The equipment room requirements are as follows:
1. In order to ensure the normal operation of the environment control system, the equipment room should be moisture-
proof and heat-insulated.
2. The equipment room must have the moisture-proof layer of the ceiling and walls must be made of polyethylene film or
painted with moisture-proof paint.
3. The entry of outdoor air may increase the load of the system, so it is necessary to minimize the entry of outdoor air
into the equipment room. It is recommended that the intake of outdoor air be kept below 5% of the entire indoor air
circulation.
4. All doors and windows should be fully enclosed.
5. The thermal load of the computer room should not be less than 30% of the rated cooling capacity of the unit.
• The Liebert XDC precision air-conditioner main unit is prohibited to be used in the open harsh
outdoor environment.
• Keep the unit upright, place it indoors, keep it away from damp and low-temperature places, and avoid contact
damage.
2.2. Maintenance Space Requirements
The Liebert XDC unit can be installed in two ways: ‘Installation between rows’ and ‘installation in room’, customers can
flexibly choose the respective model according to the actual application.
• Maintenance Space Requirements
User can choose installation between rows or installation in room, both of which require opening of the front door and the
rear door for maintenance. (In some cases, the main unit requires opening of the side door with the display screen). The
maintenance space of at least 600 mm should be provided at the front, rear and display side of the unit,
as shown in Figure 2-1.
Maintenance space of main unit between rows Maintenance space of main unit in room
Figure 2-1 Schematic Diagram of Unit Maintenance Space

Vertiv™| Liebert® XDC | User Manual 10
The minimum maintenance space requirements of the unit are shown in Table 2-1.
Table 2-1 Minimum Maintenance Space (unit: mm)
Location Minimum Maintenance Clearance
Front door 600 mm
Rear door 600 mm
Display screen side 600 mm
Note:
• These spaces are used for daily maintenance of the unit.
• The front door of the unit is defined as the side with the display screen, and the side opposite the front door is the rear door.
• The main units that are installed between the rows, only require maintenance space at the front and rear sides.
• In case of a special application, consult Vertiv local representative.
2.3. Unpacking and Inspection
2.3.1. Transportation and Handling
1. When transporting, the priority shall be given to rail or water transportation. If user choose road transportation then a
road with better road conditions should be select to prevent excessive bumps.
2. Vertiv™ Vertiv™ Liebert® XDC unit is heavy. Refer Table 2-3 for weight parameters. Mechanical handling tools, such as
electric forklifts are required for unloading and handling.
3. When transporting, transport the unit to the place closest to the installation site. Figure 2-2 illustrates the forklift lifting
the unit and the fork should be at the center of gravity to prevent tipping of the unit.
Figure 2-2 Forklift Position to Lift the Unit

Mechanical Installation11
While moving the indoor unit, keep the obliquity within the range of 75° to 105°, as shown in Figure 2-3.
Figure 2-3 Handling Angle
2.3.2. Unpacking
The unit’s cabinet is packed with honeycomb cardboard and stretch film. After moving the unit to the place closest to the
final installation site, unpack it.
The unpacking procedures are as follows:
1. First remove the top cover and winding stretch film, then remove the honeycomb cardboard, as shown in Figure 2-4.
ITEMS DESCRIPTION ITEMS DESCRIPTION
1 Top cover 3 Honeycomb cardboard
2 Remove the top cover 4 First remove the winding stretch film and then
remove the honeycomb cardboard
Figure 2-4 Unpacking the Unit
2. Remove the bottom pallet, the unit is fixed on the bottom pallet with M8x20 and M8x80 screws (as shown in
Figure 2-5), and a 17 mm open wrench, ratchet wrench or socket can be used for disassembly.

Vertiv™| Liebert® XDC | User Manual 12
ITEMS DESCRIPTION ITEMS DESCRIPTION
1 Screw GB9074_13-88_M8 x 20 2 Hexagon head bolt GB/T 5782-2000_M8 x 80
Figure 2-5 Bottom Pallet Screw Fixing Position
2.4. Inspection
After unpacking, check whether the accessories are complete according to the packing list (the Vertiv™ Liebert® XDC
accessories list is shown in the following Table 2-2), and check whether any part is obviously damaged.
If any part is found to be missing or damaged during inspection, or if any concealed damage is identified, it should be
reported immediately to the carrier, Vertiv local representative and product supplier.
Table 2-2 Liebert XDC Accessories List
Name Specifications Quantity Usage
User manual Paperback (A4 Booklet) 1 On-site reference use.
Engineering sight
glass Connection size 16 2
To be welded on the main liquid piping at site, one for each
refrigerant piping system. It is use to see while charging
the refrigerant and to observe the state of the refrigerant
in the system.
L-shaped cabinet
parts and matching
screws
Screw specifications
GB819_1_2000_M5x12 4
If the Liebert XDC main unit is installed between the rows,
user can fix it with the adjacent cabinets by combining
the cabinets.
2.5. Installation Notes
1. The Liebert XDC main unit is recommended to be installed between the rows or on the floor of the equipment room or
the computer room. According to the diversified types of Vertiv™ Liebert® XD terminals, user can choose
Vertiv™ Liebert® XDH floor installation, Vertiv™ Liebert® XDO (ceiling mounted at cold aisle), Vertiv™ Liebert® XDV
placed on the server rack.
2. Prior to installing the unit, confirm whether the installation environment meets the requirements
(refer Section 1.6 Environment Conditions), and confirm whether the building need any modification to match the
requirement of pipeline’s layout, for more details consult Vertiv local representative.
3. The installation must strictly follow the design drawings, and reserve maintenance space for daily maintenance and
repairs. Refer to the engineering dimension drawing provided by the manufacturer.

Mechanical Installation13
2.6. System Installation Layout
2.6.1. Overall System Layout
Vertiv™ Liebert® XDC air conditioner contains at least two cooling systems. The installation and application methods of
these two cooling systems are same, but the pipelings are completely independent. The overall system layout
is shown in Figure 2-6.
Figure 2-6 Overall layout of the system
Note: Figure 2-6 shows a schematic diagram of Liebert XDC with a Terminal Fan, in actual practise the number of fans
may be more than 2.
Note: Each system of the Liebert XDC main unit can be equipped with multiple cooling terminals. In Figure 2-6, one
system is equipped with 2 terminals, which is only for an example.
Note: The terminal type is not limited to Vertiv™ Liebert® XDH, Vertiv™ Liebert® XDV, Vertiv™ Liebert® XDO, consult Vertiv
Technical Team for more details.