Vertiv Liebert AHU Series User manual

Liebert® AHU
Precision Air Conditioning
Technical Manual

Copyright by Vertiv Co. Ltd.
The content in this document is subject to change without notice. All rights, including rights of translation, reproduced
by printing, copying or similar methods, and even of parts, are reserved. Violators will be liable for damages. All rights,
including rights deriving from patent license or registration of a utility model or design, are reserved. No part of this
document may be reproduced or transmitted in any form or by any means without the prior written consent of Vertiv Co.
Ltd.
Notice
The purchased products, services, and features are stipulated by the contract made between Vertiv Co., and the
customer. All or part of the products, services, and features described in this document may not be within the
purchasing scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and
recommendations in this document are provided “AS IS” without warranties, guarantees or representations of any kind,
either express or implied. The information in this document is subject to change without notice. Every eort has been
made in the preparation of this document to ensure the accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Vertiv Co., Ltd.
China
Homepage: www.vertiv.com
E-mail: [e-mail]
Customer service hotline: [phone]
Asia Pacific
Homepage: www.vertiv.com.
E-mail: [e-mail]
Australia
Customer service hotline: [phone]
New-Zealand
Customer service hotline: [phone]
For Technical Support, users may contact the nearest Vertiv Co. local sales oice or service center.

Purpose of the Document
This document applies to the series of precision air conditioners and cooling solutions which maintain optimal
environmental control of technological ecosystems at minimal operating costs. This document gives an overview of the
specifications, installation, commissioning, and maintenance procedures with troubleshooting from the user perspective.
The figures used in this document are for reference only.
Please read this manual carefully before installing, maintaining, and troubleshooting.
Liebert® AHU is a professional unit, only professionals are permitted to access the unit and is kept in a place where access is
restricted to common people.
Styling used in this Guide
The styles used in the manual will be defined as mentioned in the following table:
Situation Description
Warning/Danger/Cauon • The Warning/Danger/Caution note indicates a hazardous or potentially
harmful situation that can result in death or injury. It also indicates
instructions that need to be adhered to, failing which may result in
danger and safety issues thereby having an adverse eect on the
reliability of the device and security. Even for practices not related to
physical injury, to avoid equipment damage, performance degradation,
or interruption in service, follow the warning instruction.
Note
• The Note section indicates additional and useful information. It also
calls attention to best practices and industry-best protocols that are
standardized and help make maximum utilization of the resources at
hand. Helpful information related to the product also comes under the
Note heading, helping the users with the definitions, concepts, and
terminologies used in the manual.
Version History
Version Date BOM No. Revision
V1.0 17.02.2022 31014409 R0

Vertiv | Liebert AHU | User Manual 4
Safety Precautions and Measures
The important safety precautions and measures that should be followed during the installation and maintenance are
described in the following sections.
Read the manual prior to installation and operation of the unit. Only qualified personnel should move, install, or service
this equipment.
Before working on the equipment, the user reads and considers all precautions, compliance and safety measures. The
unit control must be used exclusively for the purpose which it is intended for; the manufacturer takes no liability for
incorrect use or a modification to the unit control.
Adhere to all the Warnings and Cautionary measures included in the manual.
Please read this manual carefully before installing, maintaining and troubleshooting; especially the
Warning/Danger/Caution information in the User Guide. Apart from the User Guide, also pay attention to
the warning labels on the unit and its components.
This manual is retained for the entire service life of the unit. The user must read all the precautions, dangers, warnings,
and cautionary measures mentioned in the manual prior to carrying out any operations on the unit. Each unit is equipped
with electric insulation which allows the users to work in safe conditions. The main switch is positioned on the electrical
panel cover; to access it, open the right door. Before any maintenance operation, switch o the unit with this electrical
insulation device to eliminate risks such as electrical shocks, burns, automatic restarting, moving parts, and remote
control. The panel key, supplied along with the unit, must be kept by the personnel responsible for the maintenance. The
protective covers can be removed after the electric power has been cut o by opening the main switch.
In the following sections, notice the various cautionary measures and warnings that need to be read carefully prior to
installing or operating the system.
Disconnect the local and remote power supplies prior to working with the unit.
Prior to the installation process, read all the instructions, verify if all the parts are in place, and check the nameplate to
ensure the voltage matches the available utility power for the unit.
The controller doesn’t isolate power from the unit even in the O mode, and some internal components still require and
receive power during the O mode.
If the unit door is open while the fans are operating, the airflow may result in abrupt slamming of the door resulting in
injury. Another aspect is the presence of small objects in the fan’s bay that can result in object ejection during the fan
start-up and there is a probable risk of being hit by these objects resulting in grievous injury and causing equipment
damage.
The unit contains fluids and gases under high pressure. Therefore, the pressure should be relieved before working with
the piping.
Various components such as compressors, refrigerant discharge lines, and humidifiers are extremely hot during the
unit operation. Therefore, allow suicient time for the unit to cool down before working with the unit cabinet. Handle the
unit with extreme caution and wear safety equipment such as protective gloves, safety shoes, and arm protection while
working with the hot compressors, discharge lines, and reheats.
There is a risk of water leaking that can damage both the equipment and the building. Eective water drain connections
and facilities should be available. Installation should be precise. Implementation of the application and service practices
should be appropriate and fault-free. Failure to comply with these norms will result in water leakage from the unit. Water
leakage can lead to massive damage and loss of critical equipment in the hosting ecosystem. Therefore, care should be
taken to ensure that the unit is not located directly above any equipment that could sustain damage due to water and
excessive moisture. Use of a leak detection system for the unit and system supply lines are recommended by Vertiv.

Vertiv™ | Liebert® AHU | Technical Manual
Table of Contents
1 Product Overview .........................................................................................................................................................................................................................1
1.1. Product Introduction................................................................................................................................................................................................................1
1.2. Model Description .....................................................................................................................................................................................................................1
1.3. Model Nomenclature..............................................................................................................................................................................................................2
1.4. Standard Configuration.......................................................................................................................................................................................................3
2 Operating & Storage Environment Requirements.................................................................................................................................. 4
2.1. Operating Environment Requirements................................................................................................................................................................ 4
2.2. Storage Environment Requirements.................................................................................................................................................................... 4
3 Technical Parameter ................................................................................................................................................................................................................5
3.1. Performance Parameters....................................................................................................................................................................................................5
3.2. Product Dimensions.............................................................................................................................................................................................................. 6
3.2.1. Overall Dimensions................................................................................................................................................................................................... 6
3.2.2. Position and Dimension of Steel Base....................................................................................................................................................8
3.2.3. Position and Dimension of Top Cover...................................................................................................................................................8
3.2.4. Position and Dimensions of Supply Air Side.................................................................................................................................10
3.2.5. Position and Dimension of Air Inlet........................................................................................................................................................10
4 Components & Features....................................................................................................................................................................................................11
4.1. Components.................................................................................................................................................................................................................................11
4.1.1. EC Fan....................................................................................................................................................................................................................................11
4.1.2. Coil.......................................................................................................................................................................................................................................... 12
4.1.3. EPIV ....................................................................................................................................................................................................................................... 12
4.1.4. 9-inch Color Display.............................................................................................................................................................................................. 12
4.1.5. iCOM Controller ......................................................................................................................................................................................................... 13

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Vertiv™ | Liebert® AHU | Technical Manual
4.1.6. Dual Power Supply- ATS ................................................................................................................................................................................... 13
4.1.7. Supply Air Temperature Sensor.................................................................................................................................................................. 13
4.1.8. Return Air Temperature & Humidity Sensor.................................................................................................................................. 13
4.1.9. Filter....................................................................................................................................................................................................................................... 13
4.1.10. Air Damper ................................................................................................................................................................................................................... 13
4.1.11. Belt type leak detector.......................................................................................................................................................................................14
4.2. SFA Components ..................................................................................................................................................................................................................14
4.2.1. MERV11 Filter................................................................................................................................................................................................................14
4.2.2. Supply Air Pressure Sensor ..........................................................................................................................................................................14
4.2.3. Airflow Meter...............................................................................................................................................................................................................14
4.2.4. Power Meter.................................................................................................................................................................................................................14
4.2.5. PICV .....................................................................................................................................................................................................................................14
4.2.6. Smoke Detector........................................................................................................................................................................................................14
4.2.7. Ultracap.............................................................................................................................................................................................................................14
5 Product Handling and Installation.........................................................................................................................................................................15
5.1. Unit Unloading........................................................................................................................................................................................................................... 15
5.2. Installing Floor Stand ......................................................................................................................................................................................................... 15
5.3. Upper Cabinet Hoisting....................................................................................................................................................................................................17
5.4. Unit Connection And Wiring.......................................................................................................................................................................................19
5.5. Maintenance Space Requirements ...................................................................................................................................................................... 21
6 Controller Operation............................................................................................................................................................................................................22
6.1. Touchscreen Display and User Interface.........................................................................................................................................................22
6.2. Touchscreen Status Dial ............................................................................................................................................................................................... 24
6.3. Dial Background-Color Status Indication......................................................................................................................................................24
6.4. Control Header.......................................................................................................................................................................................................................26

Vertiv™ | Liebert® AHU | Technical Manual
6.4.1. Powering-On iCOM and Logging-in/Unlocking Controls................................................................................................26
6.4.2. Powering-On the Thermal Management Unit........................................................................................................................... 26
6.4.3. Powering-O the Thermal Management Unit........................................................................................................................... 28
6.4.4. Logging Out................................................................................................................................................................................................................ 28
6.4.5. Setting the Date and Time............................................................................................................................................................................ 28
6.4.6. Searching....................................................................................................................................................................................................................... 28
6.4.7. Using Context-Sensitive Help....................................................................................................................................................................29
6.4.8. About iCOM Version...........................................................................................................................................................................................29
6.4.9. Accessing the User and Service Functions.................................................................................................................................. 29
6.4.10. User Menu ..................................................................................................................................................................................................................30
6.4.11. Service Menu ............................................................................................................................................................................................................30
6.4.12. Advanced Menu..................................................................................................................................................................................................... 31
6.5. User Operation.........................................................................................................................................................................................................................32
6.5.1. Editing Humidity Setpoints.............................................................................................................................................................................32
6.5.2. Editing Temperature Setpoints.................................................................................................................................................................32
6.5.3. Viewing Unit Alarms.............................................................................................................................................................................................32
6.5.4. Silencing an Audible Alarm............................................................................................................................................................................32
6.5.5. Acknowledging Alarms......................................................................................................................................................................................32
6.5.6. Viewing the Event Log...................................................................................................................................................................................... 33
6.5.7. Viewing Sensor Data ........................................................................................................................................................................................... 33
6.5.8. Managing Run Hours for a Component...........................................................................................................................................34
6.5.9. Setting Run Hours to Zero.............................................................................................................................................................................34
6.5.10. Viewing Teamwork, Stand-by, Cascade and Operating Status...............................................................................34
Appendix I: User Menu .............................................................................................................................................. 35

Product Overview1
1 Product Overview
1.1. Product Introduction
AHU is an ideal solution to handle large heat load along with larger air volume. AHU caters to several ecosystems such as
data center and IT rooms wherein optimum cooling is required along with a high degree of reliability and variability.
Changes in IT equipment technology have always been a primary driver in the development of critical infrastructure thermal
management solutions. The rising data consumption around the world has made data centers more energy-intensive.
Moreover, due to an ever-increasing demand, deployment of new technologies with high power densities have a massive
impact on the power and cooling systems that business-critical servers and communication devices depend on for their
performance and reliability. Nowadays, high scalability is the need of the hour to support rapid growth in a dynamic and
virtualized environment.
Therefore, AHU is the best-in-class, intuitive range of precision air conditioners for data centers and large ecosystems
delivering high availability and close control of the environment, providing the boost for maintaining these ambient
requirements.
With advanced remote monitoring and control software, it helps to prevent possible alarm conditions and allows proactive
maintenance and early detection of bottlenecks. With periodic reporting, the data collected can be analyzed to gain insight
into trends and unit functioning, thereby enabling better control and corrective action in the entire process flow.
Users can leverage the benefit of communication between multiple AHU units (all in the vicinity) in a synchronized manner,
thereby enabling higher reliability and precision cooling room control. With an easy-to-use graphic interface, it allows access
to the unit via a network (using an integrated Ethernet connection) and makes centralized monitoring and control possible.
1.2. Model Description
AHU models are well equipped to tackle hot spots arising out of high computing loads and are adequate to support cooling
for high-density ambience.
Figure 1-1 depicts a real-time image of AHU model.
Figure 1-1 AHU Model

Vertiv™ | Liebert® AHU | Technical Manual 2
1.3. Model Nomenclature
AHU series model is fully-defined by 25 digits, as represented in Table 1-1.
Table 1-1 AHU Model Nomenclature
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 2 5
F A 0 6 5 H C 1 N E 0 9 0 2 0 F 1 0 7 0 P 0 0 0 0
Digit 1,2 Product Model Digit 14 Filtration
FA FAN Array CRAC 2 G4
Digit 3,4,5 Air Volume 6 F6
065 65 x 1000 (CMH) Digit 15 Special Power Option
Digit 6 Air Discharge 0 None
H Horizontal airflow P Power meter
V Vertical airflow S UPS
Digit 7 System Type C Controller backup with Ultracap
C Chilled Water(CW) B Power meter + UPS
E CW+Free Cooling E Power meter + Ultracap
X DX+ Free Cooling Digit 16 Enclosure options
Digit 8 Airflow F Aluminum profile and foaming board
1 EC Fan with plastic impeller M Sheet metal
2 EC Fan with metal impeller Digit 17 Mains Switch High Voltage Option
3 PFC Fan (THDi <5%) 1 ATS C1000
Digit 9 Power Supply 3 ATS C300
N 380-415 V/3 ph/50,60 Hz+N Digit 18 Installation Option
M 380-415 V/3 ph/50,60 Hz without N 0 None
Digit 10 Cooling System SVibration isolators (PAD type) & Seismic restraint
bracket
E CW EPIV Digit 19 Monitoring
T CW Two way valves 7 Unity card (Integrated)
V CW EV Digit 20 Sensors
P CW PICV 0 None
Digit 11 Humidification S Smoke Sensor
0 None E Supply air pressure dierential sensor
H Humidifier R Remote air temperature sensor
Digit 12 Display A Airflow meter
9 Global HMI 9inch X Multi Sensors
Digit 13 Re-Heating Digit 21 Packaging
0 None P Packaging-Standard Wooden Pallet and EPE package
1 Electric heating Std 1 stage
2 Electric heating Opt. 2 stage

Product Overview3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 2 5
F A 0 6 5 H C 1 N E 0 9 0 2 0 F 1 0 7 0 P 0 0 0 0
Digit 22 Special Requirements Digit 24 Order Identifier
0 SFA-None 0~9 Factory Code
V Condensate Pump Digit 25 Order Identifier
Digit 23 Order Identifier 0~9 Factory Code
0~9 Factory Code
1.4. Standard Configuration
The Standard configuration for Cooling module and Fan module is mentioned in the following table in Table 1-2.
Table 1-2 AHU Model Nomenclature
Sr. No. Unit Code Unit Model Module Type Remark
1 01307092 FA065HC1NE09020F1070P0000 Aluminum profile + Foam board
2 01307093 FA065HC1NE09020M1070P0000 Sheet metal
3 02093790 Lifting tooling Purchase one set per
order
Note: When purchasing AHU, the lifting tooling must be purchased at the same time.

Vertiv™| Liebert® AHU | User Manual 4
2 Operating & Storage Environment Requirements
AHU operating environment meets the IEC 61000-3-12 requirements, and the storage environment of AHU meets the
IEC60721-3-3:2002 requirements. Refer Table 2-1 and Table 2-2 for the requirements of Operating Environment and Storage
Environment respectively.
2.1. Operating Environment Requirements
Table 2-1 Operating Environment Requirement
Item Requirement
Ambient temperature
Indoor temperature: 18 ºC ~ 40 ºC.
Chilled water pressure: max.16bar.
The inlet water temperature shall not be lower than the return air dew point.
The recommended maximum for return air temperature is 105 °F (40 °C) and
maximum dew point is 59 °F (15 °C).
Protection level (cooling unit) IP20
Altitude <1000 m, derating is required when located altitude is above 1000 m
Operation voltage range 380-415 V, 3 Ph + N~50/60 Hz
2.2. Storage Environment Requirements
Table 2-2 Storage Environment Requirement
Item Requirement
General requirements Clean room (no dust)
Environment humidity Less than 95% RH (30 °C)
Ambient temperature -25 °C to +55 °C
Storage time Total transportation and storage time should not exceed six months. Otherwise, the
performance needs to be re-calibrated.
Contact Vertiv local representative for any of the following conditions:
Note1: The unit voltage exceeds the operating voltage range.
Note2: De-rating for altitude above 1000 m.
Note3: If the operating condition is not as per the Table 2-1.

Technical Parameter5
3 Technical Parameter
This chapter details about the technical parameters of AHU.
3.1. Performance Parameters
Table 3-1 provides the technical parameters for AHU.
Table 3-1 Technical Parameters for AHU
Technical data FA065HC1NE09020F1070P0000 FA065HC1NE09020M1070P0000
Structure Type
Frame Aluminum Sheet Metal
Panel Color Steel & Galvanized Steel Sheet Metal
Insulation Materials Polyurethane Insulation Cotton
Capacity
Return Air T&H 36 oC/26%
Supply Air T&H 22 oC/60%
Chilled Water Temp
(oC) 15/22
Water Flow (L/s) 10.8
Water PD (kPa) 60
Cooling Capacity
(kW) 300
Sensible Cooling
Capacity (kW) 300
Fan
Air Flow(m3/h) 65000
Model EBM R3G630FB3203
Quantity 4
ESP(Pa) 100
Power(kW) 13
Air Damper
Dimensions(mm) 680 x 680 x 125
Quantity 4
Actuator Model Belimo SMQ24A
Coil
Type Copper Tube & Aluminum Fin
Tube & Fin Material Tube15.88 mm×0.4 mm Cu/Epoxy Aluminum Fin 0.145 mm
Numbers of Row 4
Fin per Inch 14
Filter
Grade G4
Dimensions(mm) 725 x 460 x 96
Quantity 16
Water Valve Model Belimo EP080F+MP
Type EPIV

Vertiv™| Liebert® AHU | Technical Manual 6
Technical data FA065HC1NE09020F1070P0000 FA065HC1NE09020M1070P0000
External
Connection
Inlet and Outlet
Water Connection
Position
Top
Connection
Method Flange
Flange Model DN80/PN16
Condensate Drain Gravity Drainage
Drain Pipe G 1-1/4
Electrical Parameter Power Supply 380-415 V/3 ph/50 Hz/60 Hz+N
FLA(A) 22.8
Sound Power Sound Power
Level(dB(LwA)) 81.3
3.2. Product Dimensions
3.2.1. Overall Dimensions
The dimensions and weight of AHU are depicted in Figure 3-1, Figure 3-2, Figure 3-3 and Table 3-2 respectively.
Figure 3-1 AHU Outline Drawing

7
Figure 3-2 Upper Section
Figure 3-3 Lower Section
Figure 3-4 Horizontal group installation

Vertiv™| Liebert® AHU | Technical Manual 8
Table 3-2 AHU Size and Weight
Product Model
Net Dimensions (mm)
(W×D×H) Packing Dimensions(mm)
(W×D×H)
Net Weight (kg)
Foam Board/Sheet
Metal
Gross Weight (kg)
Foam Board/Sheet
Metal
FA065HC
(Foam Board &
Sheet Metal) 2800 x 1600 x 3600 /2400/2400 2800/2800
Upper Section 2800 x 1600 x 1740 2900 x 1790 x 2222 1100/1100 1400/1400
Lower Section 2800 x 1600 x 1860 2790 x 1790 x 2168 1300/1300 1400/1400
3.2.2. Position and Dimension of Steel Base
The base dimensions are shown in Figure 3-5.
Figure 3-5 Steel Base (unit: mm)
3.2.3. Position and Dimension of Top Cover
The position and dimension of top cover are shown in Figure 3-6 and Table 3-3 respectively.

9
Figure 3-6 Top Cover
No. Description No. Description
1 Water pipe inlet DN80 4 Low voltage entrance M25
2 Water pipe outlet DN80 5 Condensate drain outlet G1-1/4
3 Incoming high voltage power supply entrance M40
Table 3-3 Dimensions of Top Cover (unit: mm)
A B C D E
285 475 285 475 170
Figure 3-7 Inlet and Outlet Pipe Flange (unit: mm)

Vertiv™| Liebert® AHU | Technical Manual 10
3.2.4. Position and Dimensions of Supply Air Side
The position and dimensions of supply air side are shown in Figure 3-8 respectively.
Figure 3-8 Supply Air Side (unit: mm)
3.2.5. Position and Dimension of Air Inlet
The electric box is embedded on the return air side, and the electric box door of the lower cabinet is equipped with a
color display, emergency switch, and a light switch. 16 filter screens are arranged at the return air outlet. The position and
dimensions of air inlet are shown in Figure 3-9 respectively.
Figure 3-9 The Position of Air Outlet on Unit (unit: mm)

Components & Features11
4 Components & Features
This section provides an overview of the key components, SFA components, and features of the AHU.
4.1. Components
AHU includes EC Fan, Air Damper, Water Valve, ATS, Filter, Temperature Sensor, Coil, and iCOM Controller.
Figure 4-1 AHU Device Layout
4.1.1. EC Fan
The EC Fans used in the AHU models are energy-eicient and innovative with integrated electronics and maintenance-
free design. These fans provide a cost-eective way to introduce energy-eicient technology by regulating the airflow and
reducing the fan input power. Also, the easy-to-connect feature bundled with the benefit of minimal wiring adds to the high
performance with a greater range of possible airflow rates.
Figure 4-2 depicts the EC Fans used in the models belonging to the AHU series.

Vertiv™| Liebert® AHU | Technical Manual 12
Figure 4-2 EC Fan
4.1.2. Coil
The coil used in the AHU models consists of a fin-tube heat exchanger for higher eiciency. The model-specific distribution
can ensure the even distributions of chilled water in each loop and improve the heat exchanger’s eiciency significantly
apart from minimizing the water resistance of the heat. It also minimizes the water press drop. The coil has a hydrophilic
coating as standard.
4.1.3. EPIV
EPIV-Electronic Pressure Independent Valve. The water flow of the unit can be controlled very accurately, even if the water
pressure fluctuates, the water flow can be kept stable with EPIV. EPIV has the characteristics of high reliability, maintenance-
free, fast response, and direct flow control.
4.1.4. 9-inch Color Display
AHU is available with 9-inch touch screen as a standard display, using multi-color 800×480 dot-matrix liquid crystal touch
screen with white backlight as shown in Figure 4-3. The operation of the unit becomes simpler and more convenient, and the
status view of the unit is more visualized.

Components & Features13
Figure 4-3 9-inch Color Display
4.1.5. iCOM Controller
The iCOM Controller with an easy-to-use interface with “auto-restore on power-failure” feature can store up to 400 records
at a given point of time. It comes with dual options, namely- a small display and a large display. It directly connects to the
facility network (Ethernet) and enables communication with several AHU in a synchronous manner, establishing a high
degree of reliability. It oers the highest capabilities in unit control, communication, and monitoring of mission-critical
cooling units.
4.1.6. Dual Power Supply- ATS
The dual Power ATS can automatically detect both the power sources (source 1 & source 2). In case of break-down of the
preferred power source, ATS automatically switch to the alternate source 2. It can also provide an output signal associated
with power alarm.
4.1.7. Supply Air Temperature Sensor
Supply Air Temperature Sensor can monitor the supply air temperature of the AHU. The supply air temperature can be set
on the display. When the supply air temperature exceeds the set value, the unit will alarm.
4.1.8. Return Air Temperature & Humidity Sensor
Return air temperature & humidity sensor can detect the return air temperature and humidity of the AHU. The temperature
and humidity can be set on the display. When the return air temperature or humidity exceeds the set value, the unit will
alarm.
4.1.9. Filter
AHU adopts MERV8 plate air filter which is combined by non-woven polypropylene fiber filter material and metal frame. The
filter is featured by large dust capacity, large air flow, small resistance, and easy installation.
4.1.10. Air Damper
AHU adopts motorized air damper, which is composed of framework, blade, drive link, and actuator. The air damper can
obtain digital value control by using 7S quick switch, which can provide powerful assurance for the reliable operation of the