Vertiv Liebert XDO User manual

Liebert®XDO
High Heat Density
Precision Air Conditioner
User Manual

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Vertiv™ | Liebert® XDO | User Manual
Vertiv™ Liebert® XDO | User Manual
Product BOM Version Date Revision
XDO 31014398 1.0 17-06-2021 R1
XDO 31014398 1.0 29-01-2021 R0

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Vertiv™ Liebert® XDO IUser Manual
Table of Contents
1 Overview...................................................................................................................................................................................................................................1
1.1. Product Introduction................................................................................................................................................................................................. 1
1.2. Product Appearance................................................................................................................................................................................................ 1
1.3. Model Nomenclature................................................................................................................................................................................................2
1.4. Main Components..................................................................................................................................................................................................... 3
1.4.1. Evaporator.............................................................................................................................................................................................................3
1.4.2. EC Fan......................................................................................................................................................................................................................3
1.4.3. Electronic Expansion Valve (EEV)................................................................................................................................................3
1.4.4. Filter Net................................................................................................................................................................................................................3
1.4.5. Dry Filter.................................................................................................................................................................................................................3
1.4.6. Drain Pump..........................................................................................................................................................................................................4
1.4.7. Power Module....................................................................................................................................................................................................4
1.5. Temperature and Humidity Sensors........................................................................................................................................................4
1.6. Refrigerant Requirements..................................................................................................................................................................................4
1.7. Environmental Requirements.......................................................................................................................................................................... 5
1.7.1. Operating Environment.............................................................................................................................................................................5
1.7.2. Storage Environment.................................................................................................................................................................................5
2 Mechanical Installation...........................................................................................................................................................................................6
2.1. Room Requirements ................................................................................................................................................................................................6
2.2. Maintenance Space Requirements..........................................................................................................................................................6
2.2.1. Installation Height Requirements..................................................................................................................................................6
2.2.2. Maintenance Space Requirements ............................................................................................................................................7
2.3. Unpacking and Inspection.................................................................................................................................................................................7
2.3.1. Transportation and Handling.............................................................................................................................................................7
2.3.2. Unpacking...........................................................................................................................................................................................................9
2.4. Inspection .......................................................................................................................................................................................................................10

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Vertiv™ Liebert® XDO IUser Manual
2.5. Installation ......................................................................................................................................................................................................................10
2.5.1. Overall System Layout.............................................................................................................................................................................11
2.5.2. System Installation Diagram.............................................................................................................................................................11
2.6. Installation of the Unit..........................................................................................................................................................................................11
2.6.1. Mechanical Parameters..........................................................................................................................................................................11
2.7. Pipe Outlet Position Size on Top Plate................................................................................................................................................12
2.8. Installing the Unit.....................................................................................................................................................................................................12
2.8.1. Installation Location Requirements...........................................................................................................................................12
2.8.2. Requirements for Handling Location .....................................................................................................................................12
2.8.3. Ceiling Mounted ..........................................................................................................................................................................................13
2.9. Leveling the Cabinet.............................................................................................................................................................................................16
2.10. Installing Unit Piping..........................................................................................................................................................................................16
2.10.1. Assembling the Piping Accessories....................................................................................................................................... 16
2.10.2. Internal Piping Specifications......................................................................................................................................................17
2.10.3. Connection Between the Main Unit and the Terminal........................................................................................ 18
2.10.4. Air Tightness Test.................................................................................................................................................................................. 18
2.10.5. Condensate Drain Piping Connection................................................................................................................................ 18
2.11. Mechanical Installation Checklist...........................................................................................................................................................19
3 Electrical Installation.............................................................................................................................................................................................20
3.1. Installation Tasks and Cautions .................................................................................................................................................................20
3.1.1. Cabling Connection at the Site......................................................................................................................................................20
3.1.2. Installation Notes.......................................................................................................................................................................................20
3.2. Cabling of the Terminal......................................................................................................................................................................................21
3.2.1. Electrical Interface Location of the Terminal....................................................................................................................21
3.2.2. Connection of Unit Power Supply Cables .........................................................................................................................22
3.3. Control Cables Connections........................................................................................................................................................................23
3.4. Electrical Inspection Checklist..................................................................................................................................................................24

Vertiv™ Liebert® XDO IUser Manual
4 System Startup and Commissioning....................................................................................................................................................25
4.1. Startup and Commissioning.......................................................................................................................................................................... 25
4.1.1. Preparation Before Commissioning...........................................................................................................................................25
4.1.2. Commissioning Procedures.............................................................................................................................................................25
4.2. Commissioning Inspection Checklist .................................................................................................................................................25
5 Controller Operation Instructions...........................................................................................................................................................26
6 System Operation and Maintenance......................................................................................................................................................27
6.1. Routine Maintenance Inspection (Monthly)..................................................................................................................................27
6.2. Routine Maintenance Inspection (Semi-annual) ....................................................................................................................28
6.3. System Troubleshooting Test....................................................................................................................................................................28
6.4. Electrical Connection Inspection............................................................................................................................................................29
6.4.1. Electrical Maintenance.........................................................................................................................................................................29
6.4.2. Control Maintenance.............................................................................................................................................................................29
6.5. Maintenance of Filter Net...............................................................................................................................................................................30
6.6. Maintenance of Fan Components..........................................................................................................................................................30
6.7. Maintenance of Cooling System................................................................................................................................................................31
6.8. Maintenance of Drainage System...........................................................................................................................................................31
7 Troubleshooting..........................................................................................................................................................................................................33
7.1. Troubleshooting and Fault Handling of EC Fan..........................................................................................................................33
7.2. Troubleshooting and Fault Handling of Electronic Expansion Valve...................................................................33
7.3. Troubleshooting and Fault Handling of Cooling System..................................................................................................34
Appendix I: Circuit Diagram of Vertiv™ Liebert® XDO...........................................................................35
Appendix II: Alarm Output Menu Table......................................................................................................36
Appendix III: List of Maintenance Inspection Items (Monthly) ..........................................................37
Appendix IV: List of Maintenance Inspection Items (Semi-annually) ..............................................38
Appendix V: Toxic and Hazardous Substances or Elements...............................................................39

Overview1
1 Overview
Vertiv™Liebert® XDO High Heat Density Precision Air Conditioner (hereafter referred as Liebert XDO). The Liebert XDO is a
specially engineered unit 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 a shopping mall, light industry, farm or commercial
environment.
1.1. Product Introduction
The Liebert XDO unit is a small and medium-sized precision environmental control system that is suitable for the
environmental control of small and medium-sized modified computer rooms, modular computer rooms, and large computer
rooms that require energy saving and high heat density. It is designed to ensure precision equipment such as sensitive,
industrial processing, communication, and computers have a controlled operating environment.
It also has features such as high reliability, high sensible heat ratio, and large air volume; it uses R410A an environment
eicient refrigerant to meet the international environmentally safe requirements. The finned tube heat exchanger with a
sophisticated design and layout provides excellent heat exchanging performance. The EC fan with large air volume and
low energy consumption makes the system run more energy-eicient. The electronic expansion valve (EEV) intelligently
controls the uniform distribution of refrigerant flow and eectively solving the heat dissipation problem of the high heat
density server cabinet
1.2. Product Appearance
The appearance of Liebert XDO unit is shown in Figure 1-1.
Figure 1-1 Appearance of Liebert XDO Unit

Vertiv™| Liebert® XDO | User Manual 2
1.3. Model Nomenclature
Vertiv™Liebert® XDO is defined by twelve digits, as represented in Table 1-1.
Table 1-1 Liebert XDO Nomenclature
1 2 3 4 5 6 7 8 9 10 11 12
X D O 0 2 0 C S 1 5 H C
Digit 1, 2 Product Model
XD X-treme High Density
Digit 3 Cooling System
H Horizontal Cabinet In row Installation
V Vertical on Rack
O Overhead Rack
Digit 4, 5, 6 Cooling Capacity kW
0-9 20 kW
Digit 7 XD Modular Type
B Standard Cabinet Pump System Terminal
C Standard Cabinet Compressor System Terminal
Digit 8 Power Supply
S 220 V to 240 V, 1 Ph, 50 Hz
N 380 V to 415 V, 3 Ph, 50 / 60 Hz+N
M 380 V to 400 V, 3 Ph, 50 Hz
Digit 9 Refrigerant
1 R410A
2 R134A
Digit 10 Condensate Pump
L Without Condensate Pump
5 With Condensate Pump
Digit 11 Condensate Pump
R With Air Direction Grille
H Without Air Direction Grille
Digit 12 Order Identifier
1~9 Version
C China Version
A America Version
E EMEA
The standard components are represented in ‘Bold Italic’ font.

Overview3
1.4. Main Components
The main components of the Vertiv™Liebert® XDO terminal unit include evaporator, EC fan, electronic expansion valve, filter
net, dry filter, drain pump, and power module.
1.4.1. Evaporator
The finned tube heat exchanger with high heat dissipation eiciency, and the V-shaped symmetrical layout is adopted with
an elegant design that improves the eiciency of the heat exchange.
1.4.2. EC Fan
The unit is equipped with highly energy eicient fans with large air volume, high air pressure, low power consumption,
real-time adjustable fan speeds in accordance to the terminal cooling demand, which provide more energy-saving and more
reliable performance.
1.4.3. Electronic Expansion Valve (EEV)
The unit is provided with electronic expansion valve to adjust the flow of refrigerant more accurately and ensure the
uniformity of flow distribution at each terminal. This also helps in monitoring the temperature and pressure signals of the
flow simultaneously.
Figure 1-2 Electronic Expansion Valve (EEV)
1.4.4. Filter Net
Liebert XDO unit is provided with a filtration net, which is highly eicient in protecting the unit by filtering the impurities and
dust in the air.
1.4.5. Dry Filter
The dry filter can eectively filter the moisture and impurities generated in the long-term operation of the system to ensure
the normal operation of the system.

Vertiv™| Liebert® XDO | User Manual 4
1.4.6. Drain Pump
Vertiv™Liebert® XDO unit adopts a self-priming drainage pump with small size, low noise and high reliability; the rated
voltage required for the system is 220 Vac. It also includes the idling protection and overload protection functions to ensure
timely rapid discharge of condensate water.
1.4.7. Power Module
The power module has high eiciency, low electrical loss, reliable and stable operation, ensuring the normal operation
of the terminal unit.
1.5. Temperature and Humidity Sensors
Vertiv™ Liebert® XDO units are equipped with return air temperature and humidity sensor, and supply air temperature
sensor as standard options. These sensors enable controller to control and modulate the cooling capacity of the unit and
also help in monitoring and triggering alarms if any threshold value exceeds the setup parameters.
1.6. 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.

Overview5
1.7. Environmental Requirements
1.7.1. Operating Environment
The operating environment of the Vertiv™Liebert® XDO 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%
Unit protection level IP20
Altitude 1000 m, more than 1000 m, please contact Vertiv local representative
Operating voltage range 220 V to 240 V ±10%, 50 Hz / 60 Hz, 1 N~
Pollution level Level II
1.7.2. Storage Environment
The storage environment of the Liebert XDO unit meets the requirements of GB4798.1-2005,
as shown in Table 1-3.
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

Vertiv™| Liebert® XDO | User Manual 6
2 Mechanical Installation
This chapter introduces the mechanical installation of the Vertiv™Liebert® XDO 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. 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 and the gap should be as small as possible.
5. In order to ensure the normal application of Liebert XDO, it is recommended that the equipment room be equipped with a
dehumidifier.
The Liebert XDO precision air-conditioner unit is prohibited to be used in the open harsh outdoor
environment.
2.2. Maintenance Space Requirements
The Liebert XDO is a set of high heat density cooling unit, which is ceiling-mounted above the heat dissipating cabinet to
form a “hot aisle-cold aisle” layout. The fan draws hot air from the cabinets, passes through the cooling coils on the two sides,
and then provides cold air to the cabinets.
2.2.1. Installation Height Requirements
In order to ensure the proper distribution of air in the hot and cold aisles in the room, the recommended height range of the
Liebert XDO above the cabinet is 457 mm to 609 mm, and the maximum height must not exceed 762 mm,
as shown in Figure 2-1.
Figure 2-1 Height Requirement of the Unit

Mechanical Installation7
2.2.2. Maintenance Space Requirements
When installing, ensure to reserve a maintenance space of at least 600 mm in the front, rear, and bottom sides of the unit, as
shown in Figure 2-2.
Figure 2-2 Maintenance Space of the Unit
Table 2-1 represents the minimum maintenance space requirements of the unit.
Table 2-1 Minimum Maintenance Space (unit: mm)
Location XDO020CS15HC
Front 600 mm
Rear 600 mm
Top 600 mm
Note 1: The side with the operation indicator light is defined as the front of the unit, and the other side is defined as the
rear of the unit. These spaces are used for regular maintenance, such as replacing filters, fans, electronic expansion
valves, and maintaining electronic control boxes.
Note 2: 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™Liebert® XDO 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 2-3 illustrates the forklift lifting
the unit and the fork should be at the center of gravity to prevent tipping of the unit.

Vertiv™| Liebert® XDO | User Manual 8
ITEMS DESCRIPTION
1 Direction of Fork
Figure 2-3 Forklift Position to Lift the Unit
While moving the indoor unit, keep the obliquity within the range of 75° to 105°, as shown in Figure 2-4.
Figure 2-4 Handling Angle

Mechanical Installation9
2.3.2. Unpacking
Vertiv™Liebert® XDO cabinet is packed with wooden boxes. After moving the unit to the nearest place of final installation,
unpack the unit.
The unpacking procedures are as follows:
1. First remove the top cover and winding stretch film, then remove the honeycomb cardboard and foam board,
as shown in Figure 2-5.
Figure 2-5 Unpacking the Unit
2. Remove the bottom pallet, the unit is fixed on the bottom pallet with M8 x 20 and M8 x 80 screws (as shown in
Figure 2-6), and a 17 mm open wrench, ratchet wrench or socket can be used for disassembly.
ITEMS DESCRIPTION ITEMS DESCRIPTION
1 Screw GB9074_13-88_M8 x 20 2 Hexagon head bolt GB/T 5782-2000_M8 x 80
Figure 2-6 Bottom Pallet Screw Fixing Position

Vertiv™| Liebert® XDO | User Manual 10
2.4. Inspection
After unpacking, check whether the accessories are complete according to the accessories kit (refer Table 2-2 for
accessories checklist) and check whether any part is 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 and Vertiv local representative and product supplier.
Table 2-2 Checklist of Accessories in the Kit
Particulars Specification Quantity Usages
User manual A4 1 Site reference use
Gas line copper pipe kit ø22×1226 1 Field brazing components
Liquid line copper pipe kit ø12.7×862 1 Field brazing components
Filter drier Connection size
ø16 1 Field brazing components
Lifting plate 606×50×78 2 External mounting bracket and fixing
bolts for ceiling installation
Cross recessed hexagonal combination bolts GB9074_13-88_
M6X20 6External mounting bracket and fixing bolts for ceiling installation
Type I non-metallic insert hexagon lock nut M10 8 Provide matching fasteners for threaded
rods on site
Type I hexagon nut with metal insert GB6170-2000_
M10 4Provide matching fasteners for threaded rods on site
Gasket DMBM8.610.3543 4 Provide matching fasteners for threaded
rods on site
Bushing ø38.1×ø35 4 Provide matching fasteners for threaded
rods on site
Sleeve 127×ø35 4 Provide matching fasteners for threaded
rods on site
2.5. Installation
In order to realize the design performance of the unit and maximize its service life, proper installation is essential. The
content of this section should be applied in conjunction with the current mechanical and electrical installation regulations
• Installation Notes
1. Vertiv™Liebert® XDO unit uses a ceiling-mounted method and must be installed above the heat dissipating equipment.
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 piping
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 Installation11
4. System Installation Layout
2.5.1. Overall System Layout
Refer to the relevant content of the overall system layout in “Vertiv™Liebert® XDC multi-connected air conditioner main unit
User Manual”.
2.5.2. System Installation Diagram
Refer to the relevant content of the system installation diagram in “Vertiv™Liebert® XDC multi-connected air conditioner
main unit User Manual”.
2.6. Installation of the Unit
2.6.1. Mechanical Parameters
The Liebert® XDO unit dimensions and mechanical parameters are shown in Figure 2-7 and Table 2-3.
Figure 2-7 Dimension of Liebert XDO Unit
Table 2-3 Mechanical Parameters of Liebert XDO Unit
Product Model Mechanical Parameters
(WxDxH) (mm)
Packing Material
Parameters (W×D×H) (mm)
Net Weight of
Unit (kg)
Gross Weight of
Unit (kg)
XDO020CS15HC 615×1835×580 720×1940×845 110 140

Vertiv™| Liebert® XDO | User Manual 12
2.7. Pipe Outlet Position Size on Top Plate
The location and positioning dimensions of the inlet and outlet pipes of the unit top plate are shown in Figure 2-8.
ITEMS DESCRIPTION ITEMS DESCRIPTION
1 Drain 3 Refrigerant outlet
2 Inlet cable 4 Refrigerant inlet
Figure 2-8 Outlet Position of the Unit’s Top Plate
2.8. Installing the Unit
2.8.1. Installation Location Requirements
The position and spacing of the Vertiv™Liebert® XDO terminal mounted on the ceiling are determined by the heat density of
the heat dissipating cabinet. For specific spacing, please refer to the relevant drawings on site.
• The Liebert XDO terminal must be firmly installed at the ceiling. Therefore, the building structure of
the ceiling and the support of the existing building need to be reinforced.
• Ensure to stabilize the top of the suspension rod and ensure that all nuts are firmly tight.
2.8.2. Requirements for Handling Location
It is recommended to use a motorized forklift or manual forklift to transport the unit to the installation site, or at least two
trained personnel are needed to carry it. The location requirements for personnel handling the unit are shown in Figure 2-9.
To avoid the leakage or breaking of the piping, do not use the side panels or external piping of the unit to directly lift or move
the unit.

Mechanical Installation13
ITEMS DESCRIPTION
1 Do not carry the unit directly from the side panel or pipeline of the Vertiv™Liebert® XDO
Figure 2-9 Unit Handling Position Requirements
2.8.3. Ceiling Mounted
The Liebert XDO uses the threaded suspension rods provided on site to hang on the elevated structure (such as the ceiling)
of the room. Specifically: fix the suspension rods on the external bracket, and then install them on the front and rear panels of
the Liebert XDO unit terminal.
Following are the steps to fix the unit with the external mounting brackets:
1. Figure 2-10 shows the four M10 I-shaped metal insert hex nuts and eight M10 non-I-shaped metal insert hex lock nuts
that come with the unit accessories to fix the four M10 threaded rods respectively on the mounting bracket.
ITEMS DESCRIPTION ITEMS DESCRIPTION
1 M10 threaded rod 4 Brush (accessories)
2 I type of metal hexagon nut (accessories) 5 Shim (accessories)
3 Sleeve (accessories) 6 I Type of nonmetal hexagon nut (accessories)
Figure 2-10 Unit External Installation Kit
2. Place the bracket against the front or rear panel of the Liebert XDO and ensure that the bottom edge of the bracket is
aligned with the bottom of the panel. Then use the 6 cross-recessed M6 hexagonal combination bolts in the accessories
kit to fix the bracket on the Liebert XDO panel, refer Figure 2-11.

Vertiv™| Liebert® XDO | User Manual 14
Figure 2-11 The Front and Rear Panels Installation
3. After fixing the panels, use lifting equipment to hoist the Vertiv™Liebert XDO to the installation connection of the
elevated building structure or ceiling, and utilize the parts provided on site to fix it. The dimensions of the lifting fixing
holes are shown in Figure 2-12 and Figure 2-13.
ITEMS DESCRIPTION
1 Wire hole (steel wire wrapped with cloth to prevent damage to the surface)
Figure 2-12 Unit Hoisting and Fixing Locations