Vertiv Liebert CR012 User manual

Liebert®CR012
Precision Air Conditioning
User Manual

Copyright by Vertiv Tech 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 Tech Co., Ltd.
Notice
The purchased products, services, and features are stipulated by the contract made between Vertiv Tech Co.,
Ltd., 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 effort 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 Tech Co., Ltd.
⚫China
Website: www.vertiv.com
E-mail: [e-mail]
Customer service hotline: [phone]
⚫Asia Pacific
Homepage: www.vertiv.com
E-mail: [e-mail]
For Technical Support, users may contact the nearest Vertiv Tech Co., Ltd. local sales office or service center.

Purpose of the Document
This document applies to the Liebert CR012 precision air conditioners and cooling solutions which maintain an
optimal environmental control mainly for testing laboratories, data center rooms and similar technological
systems at minimal operating costs. The figures used in this document are for reference only.
Please read this manual carefully.
Styling used in this Guide
The styles used in the manual will be defined as mentioned in the following table:
Situation
Description
Warning/Danger/Caution
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 effect on the reliability of the device
and security. Even for practices not related to physical injury, the content under the Warning
heading is used for precautions which need to be taken which, otherwise, could result in equipment
damage, performance degradation, or interruption in service.
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
Date
Issue
Revision
Change
16-09-2019
31014078
V1.1
-

Table of Contents
Chapter 1 Introduction.........................................................................................................................................................1
1.1 Model Nomenclature.............................................................................................................................................1
1.2 Basic Performance Parameters............................................................................................................................2
1.3 Product Description...............................................................................................................................................2
1.4 Main Components of Indoor Unit ..........................................................................................................................3
1.4.1 DC Brushless Compressor........................................................................................................................3
1.4.2 Fan ............................................................................................................................................................4
1.4.3 Evaporator.................................................................................................................................................4
1.4.4 Electronic expansion valve........................................................................................................................4
1.4.5 Electric heater............................................................................................................................................5
1.4.6 Sight Glass................................................................................................................................................5
1.4.7 Filter Drier..................................................................................................................................................5
1.4.8 Micro-Controller.........................................................................................................................................5
1.4.9 Condenser.................................................................................................................................................6
1.5 Optional Equipment ..............................................................................................................................................6
1.6 Working Conditions...............................................................................................................................................6
1.6.1 Operating Condition...................................................................................................................................6
1.6.2 Storage Condition......................................................................................................................................7
1.6.3 Refrigerant Charging Requirement............................................................................................................7
Chapter 2 Installation ..........................................................................................................................................................8
2.1 Pre-Installation......................................................................................................................................................8
2.1.1 Transportation & Movement ......................................................................................................................8
2.1.2 Unpacking..................................................................................................................................................9
2.1.3 Inspection................................................................................................................................................10
2.2 Installation Preparation (Site Preparation)..........................................................................................................10
2.2.1 Equipment Room Requirement ...............................................................................................................10
2.2.2 Installation Space requirements ..............................................................................................................10
2.2.3 Installation Tools......................................................................................................................................11
2.3 Mechanical Installation........................................................................................................................................12
2.3.1 System arrangement during installation...................................................................................................12
2.3.2 System Installation Mode.........................................................................................................................13
2.3.3 Product Dimensions ................................................................................................................................14
2.3.4 Installation Procedures............................................................................................................................16
2.3.5 Piping.......................................................................................................................................................19
2.3.6 Removing Transportation Fastener and Vibration Absorber....................................................................24
2.3.7 Checklist for completed mechanical installation ......................................................................................25
2.4 Electrical Installation...........................................................................................................................................25
2.4.1 On-site Wire connections.........................................................................................................................25
2.4.2 Installation Notes.....................................................................................................................................25
2.4.3 Connecting cables of the Indoor unit .......................................................................................................26
2.5 Commissioning Overview ...................................................................................................................................30
2.5.1 Self Check...............................................................................................................................................30

2.5.2 Preparations for Startup...........................................................................................................................31
2.5.3 Startup Inspection....................................................................................................................................31
Chapter 3 Micro-Controller................................................................................................................................................34
3.1 Micro-Controller ..................................................................................................................................................34
3.2 Control buttons....................................................................................................................................................34
3.3 Common Operational function examples............................................................................................................35
3.4 Main Screen........................................................................................................................................................35
3.5 Password interface .............................................................................................................................................36
3.6 Menu Structure ...................................................................................................................................................36
3.7 Teamwork...........................................................................................................................................................47
3.7.1 Main and standby functions.....................................................................................................................47
3.7.2 Typical Standby Function ........................................................................................................................48
3.7.3 Rotation functions....................................................................................................................................48
3.7.4 Wiring connection....................................................................................................................................49
3.7.5 Parameter setting....................................................................................................................................50
Chapter 4 Maintenance & Troubleshooting.......................................................................................................................51
4.1 Routine Maintenance & Inspection (Monthly) .....................................................................................................51
4.2 Routine Maintenance and Inspection (Half -Yearly)............................................................................................52
4.3 Self-Diagnosing Functions..................................................................................................................................52
4.4 Maintenance of Electrical Control utilities ...........................................................................................................52
4.5 Air Filter Maintenance.........................................................................................................................................54
4.6 Fan Kit Maintenance...........................................................................................................................................54
4.7 Electrical Heater Maintenance............................................................................................................................54
4.8 Refrigerating System Maintenance.....................................................................................................................54
4.9 Drainage system maintenance............................................................................................................................54
4.10 Troubleshooting................................................................................................................................................55
Appendix 1 Circuit Diagram...............................................................................................................................................57
Appendix 2 Menu Structure Of Micro-Processing Controller.............................................................................................58
Appendix 3 Alarm Control Menu Table..............................................................................................................................59
Appendix 4 Hazardous Substances or Elements Announcement.....................................................................................60
Appendix 5 Maintenance Table (Monthly).........................................................................................................................61
Appendix 6 Maintenance Table (Half yearly).....................................................................................................................62

Liebert CR012 Precision Air Conditioning User Manual
Chapter 1 Introduction 1
Chapter 1 Introduction
The Liebert CR012 is the next generation air conditioners that provide precise environmental control. The Liebert
CR012 models are the latest in the long line of modern enterprise-grade products from the Liebert family.
Incorporating the high standards associated with the Liebert name, the CR012 utilizes the latest technology, system
components, and streamlined manufacturing process.
Liebert CR012 air conditioners are products that are specifically created and designed for the small to medium data
centers, computer rooms, and similar systems which call for a high degree of accuracy and precision. It addresses
the needs and challenges associated with such applications and setups. It caters to sensitive applications which
need a suitable environment for optimal performance. Therefore, care should be taken when testing these products to
maintain favorable conditions for mission-critical equipment. Precision Air Conditioning must not only keep room
conditions within a specific range but also must have the capability to react quickly to drastic changes in the heat load
and prevent wide temperature fluctuations.
The CR012 air-cooledAC unit is packed with features such as high reliability, high sensible heat ratio, and large
airflow. The unit is an air-cooled single circuit system and configured with DC Speed Regulation axial flow fan.
Figure 1-1 shows the appearance of the Liebert CR012:
Figure 1-1 Appearance of the air conditioner
1.1 Model Nomenclature
The model of the CR012 AC is fully-defined by twenty-five digits, as shown in Figure 1-2.

Liebert CR012 Precision Air Conditioning User Manual
2 Chapter 1 Introduction
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
C R 0 1 2 R A 1 3 8 0 S 1 2 E 3 0 0 0 0 P V 0 0 0
Product model 15 Coil and Valves
CR CRV E Standard DX Air cooled coil,EEV
Cooling Capacity kW 16 Enclosure options
012 NominalNet Cooling Capacity - kW 3 Black Color sand grain coating, EG7021
6 Air Discharge 17 Mains Switch High Voltage Option
R Horizontal airflow with baffle 0 None
H Horizontal airflow without baffle 18 Installation Option
7 Systemtype H Reheat & Humidity Lockout
A
Air-colled
0 None,standard pipe,no Low ambient Kits
8 Airflow L Air-cooled,Long pipe>30m
1 ECplug fan C Low ambient Kits
9 Power Supply B Low ambient Kits+Long Pipe
3380-415V/3ph/50Hz +N 19 Monitoring
T380-415V/3ph/60Hz +N 0 RS485
10 Cooling System S SICcard
8 ECcompressor ,Single Circuit,R410A 20 Sensors
11 Humidification 0 None
0 None 21 Packaging
S Electrode humidifier P
Packaging - Standard Cardboard and Wooden
12 Display Pallet
S Standard Display C Packaging - Wooden crate
13 Re-Heating 22 Special Requirements
0 None A SFA - none
1 Electric heating Std 1 Stage V Condensate Pump
14 Filtration 23~25
Order Identifier
2G4
0 G4 + Filter clog switch
1～2
3～5
Figure 1-2 Model Nomenclature
1.2 Basic Performance Parameters
The basic performance parameters of the Liebert CR012 AC are given in table 1-1.
Table 1-1
Model
Total cooling capacity (kW)
Power (kW)
Heating capacity (kW)
CR012
13.6
3.3
2
Condition: Return air 37˚C, 24% RH & 45˚C condensing temperature.
1.3 Product Description
The Liebert CR012 cooling unit is a comprehensive system that includes all the main functions fundamental to
precision cooling units such as cooling, dehumidification, re-heating, air filtration, condensation management,
temperature and humidity control, alarm functions and compatibility with data communications. Liebert CR012 is
designed to comply with mission-critical requirements and ensure that servers are maintained at the correct
temperature and humidity levels.
Figure 1-3 shows the various components and their respective locations:

Liebert CR012 Precision Air Conditioning User Manual
Chapter 1 Introduction 3
Figure 1-3 Components and their locations
Table 1-2
Item
Description
Item
Description
1
Top electrical entrance
7
Condensate pump
2
Electric box
8
Bottom electrical entrance
3
Top condensate-pump drain
9
Bottom condensate-pump drain
4
Supply and Return
10
Evaporator Coil
5
EC plug fans
11
Compressor
6
Electric heaters
Table 1-3
Model
Dimensions (W x D x H) (mm)
CR012HA1380S02E30000PV000
300 x 1100 x 2000
CR012RA1380S10E30000PV000
1.4 Main Components of Indoor Unit
The following section expounds the list of components used in the Liebert CR012 PrecisionAir conditioners.
1.4.1 DC Brushless Compressor
The Liebert CR012 models comprise of a DC Brushless compressor which has a host of promising features as
mentioned in the following list:
⚫Low operational noise
⚫Rapid Cooling
⚫Less Vibration
Moreover, there are no brushes compared to typical DC motors. Its compactness, reliability, longer lifetime, and better
capacity control combined with streamlined energy-efficiency make it an ideal compressor for the CR012.
Figure 1-4 shows the image of a DC brushless compressor:

Liebert CR012 Precision Air Conditioning User Manual
4 Chapter 1 Introduction
Figure 1-4 DC Brushless Compressor
1.4.2 Fan
The EC Fans used in the Liebert CR012 models are energy-efficient and innovative with integrated electronics and a
maintenance-free design.
⚫Ability to regulate the airflow and reduce the fan input power leading to high energy-efficiency
⚫Easy-to-connect facility with minimum wiring leading to high performance with a great variety of possible air flow rates
Figure 1-5 shows the EC Fans used in the models belonging to the CR012:
Figure 1-5 CR012 EC Fans
1.4.3 Evaporator
The sophisticated design of the distributor ensures that the refrigerant is distributed evenly in each loop, thereby
improving the effectiveness of the heat exchanger.
⚫Streamlined Heat exchanger design and air distribution for optimum performance
⚫Fin-tube heat exchanger for higher efficiency
Figure 1-6 shows the image of an Evaporator:
Figure 1-6 Evaporator
1.4.4 Electronic expansion valve
The EEV is designed for modulating control of the refrigerant mass flow with precision. The EEV collects temperature
and pressure signals at the same time to accurately regulate the refrigerant flow. The EEV's wide operating envelope
also lowers down the condensing pressure, thereby resulting in significant energy savings.

Liebert CR012 Precision Air Conditioning User Manual
Chapter 1 Introduction 5
⚫Designed for modulating control of the refrigerant mass flow with precision
⚫Ensures effective control on super-heating at the end of the evaporator
⚫Better low load capacity
⚫Designed for easy Installation-and-Service
Figure 1-7 depicts the image for the EEV used in the CR012:
Figure 1-7 EEV
1.4.5 Electric heater
In the CR012 models, the PTC heaters are used as they have lower running temperatures, thereby ensuring
operational safety.
⚫Less susceptible to overheating and long lasting due to less wear
⚫Lower Maintenance and smooth operation
Figure 1-8 shows an image of the Electric Heater:
Figure 1-8 PTC Heater
1.4.6 Sight Glass
The sight glass is a utility for observing the refrigerant state; specifically, the moisture content of the system. If the
moisture content exceeds the levels of defined standards, the color changes, thereby, indicating irregularity in the
moisture content.
1.4.7 Filter Drier
Moisture can adversely affect the operations and service life of a system in the refrigeration lifecycle. In order to
rectify that condition, filter driers are used to filter out particles, remove, and hold moisture to prevent it from
circulating through the system.
1.4.8 Micro-Controller
The Micro-Controller used in CR012 provides a simple operational user-interface and is developed using the latest
and highly advanced PID regulation technology.
⚫Multilevel Password protection
⚫Self-recovery upon power failure and high-voltage & low-voltage protection
⚫Automatic phase-sequence switching upon the antiphase and rotate speed control of the outdoor fan

Liebert CR012 Precision Air Conditioning User Manual
6 Chapter 1 Introduction
⚫High-end Fault diagnostic system to facilitate easy equipment maintenance
Figure 1-9 shows the image of the micro-controller:
Figure 1-9 Display panel of the Controller
1.4.9 Condenser
The Liebert range of air condensers offers many advantages, some of which are listed below:
⚫Sharp and Powerful design
⚫Antirust aluminum cabinets
⚫Low sound levels
⚫High reliability over a wide range of ambient conditions
Figure 1-10 shows the image of the condenser used in the CR012:
Figure 1-10 Condenser
For more information on the condenser, refer to the Liebert LSF Condenser User manual.
1.5 Optional Equipment
The Liebert CR012 is compatible with multiple temperature/humidity sensors based on the requirement.
An interesting development is the compatibility with the Liebert CR012 models with the Modbus protocol. Through the
configured RS 485 port or TCP/IP port, the CR012 systems can communicate with the host computer in addition to
remotely taking charge of the host software.
1.6 Working Conditions
In this section, look at the environmental conditions including the Operating and Storage environment.
1.6.1 Operating Condition
Table 1-4 defines the Operating condition parameters including theAmbient Temperature, Protection level,Altitude,
and Voltage range.

Liebert CR012 Precision Air Conditioning User Manual
Chapter 1 Introduction 7
Table 1-4
Item
Requirement
Ambient temperature
Indoor
18°C ~ 40°C
Outdoor
-15°C ~ +45°C, if a low temperature kit is configured, the lowest outdoor operation
temperature is -34°C
Protection level (indoor
unit)
IP20
Altitude
< 1000m. Above that, please contact Vertiv.
Operation voltage range
(380 ~ 415) V ±10%, 3N ~ 50Hz / 60Hz
1.6.2 Storage Condition
The following table 1-5 defines the Storage condition parameters including the ambient humidity, ambient
temperature, and storage time conditions.
Table 1-5
Item
Requirement
Storage environment
Indoor, clean (without dust)
Ambient humidity
< 95%RH
Ambient temperature
-33°C ~ +70°C
Storage time
Total transportation and storage time should not exceed six months. Otherwise, the performance
needs to be re-calibrated
1.6.3 Refrigerant Charging Requirement
Another essential aspect is the quality and make of the refrigerant oil. Adding poor quality oil, counterfeit oil, or oil for
a different model will damage the system. Please use refrigerant approved by Vertiv Tech Co., Ltd.
Low quality or counterfeit refrigerant will severely damage the system. Please use refrigerant approved by Vertv Co.
Ltd. Any abnormality or damage caused by the use of low-quality refrigerant will result in the warranty being invalid.
Table 1-6 depicts the refrigerant brands, which are approved by Vertiv Tech Co., Ltd.
Table 1-6
Brand
Logo
Note
DU PONT
The DU PONT refrigerant adapts a custom-made package
JUHUA

Liebert CR012 Precision Air Conditioning User Manual
8 Chapter 2 Installation
Chapter 2 Installation
The Installation process consists of the following procedures, namely-
⚫Pre-installation
⚫Installation Preparation
⚫Mechanical Installation
⚫Electrical Installation
2.1 Pre-Installation
Pre-installation contains the following 3 sub sections, namely-
⚫Transportation & Movement
⚫Unpacking
⚫Inspection
2.1.1 Transportation & Movement
When it comes to transporting the system, Railroad is a preferable choice. However, if railroad transportation is not
possible, then the truck transport option is an optimal choice. One precaution is to choose roads that do not have too
many bumps and if any, avoid it as much as possible.
⚫Liebert CR012 systems are on the heavier side and therefore, it is recommended that equipment like an electric forklift
is utilized for these heavy-duty systems.
⚫Move the equipment to a location which is in the vicinity of the installation site.
⚫If an electric forklift is used, insert the tines of the forklift below the pallet as displayed in Figure 2-1. Align the tines with
the center of gravity to prevent the equipment from falling over. Figure 2-1 depicts the way the tines of the forklift are
inserted below the pallet and in the same image, the graphic to the right indicates that the tines are aligned with the
center of gravity to prevent the equipment from falling over:
Figure 2-1 Moving the equipment using a Forklift truck
In the previous figure (Figure 2-1), the air conditioner is lifted using the forklift truck and is aligned with the center of
gravity. While moving the indoor unit, the obliquity has to be maintained at an angle of 75°to 105°.
Figure 2-2 depicts the 75°to 105°obliquity that is suitable to move the air conditioning package to the vicinity of the
desired location:

Liebert CR012 Precision Air Conditioning User Manual
Chapter 2 Installation 9
Figure 2-2 Obliquity of the system
2.1.2 Unpacking
The cabinet uses a honeycomb cardboard and winding stretch film for packaging purposes. Shift the product to a
location closer to the final installation site prior to unpacking the unit.
Initially, remove the top cover and winding stretch film. Next, remove the honeycomb cardboard as depicted in Figure
2-3.
Figure 2-3 Unpacking the outer package
The unit is fixed on the packing pallet with M8*20 and M8*80 screws. Use a 17mm open-end spanner, ratchet
spanner, or sleeve to remove the screws.
Refer to Figure 2-4 to for the schematic diagram.

Liebert CR012 Precision Air Conditioning User Manual
10 Chapter 2 Installation
Figure 2-4 Screws on the pallet
2.1.3 Inspection
Moving forward, check the system fittings and its components against the packing list to ensure that everything is in
place and the assembly is intact.
If any parts or components are missing or damaged, immediately report the issue to the carrier. If hidden damages
are observed, then contact the local offices of that carrier as well as Vertiv at the earliest.
2.2 Installation Preparation (Site Preparation)
The CR012 air conditioners is streamlined for maintaining a favorable environment for data centers, computer rooms,
and similar systems. Strict adherence to the installation procedures is mandatory to ascertain proper installation of
the air conditioner.
2.2.1 Equipment Room Requirement
The equipment room must be prepared to ensure smooth operation and obtain accurate results. The equipment room
must meet the standards for appropriate ventilation and heating. The design specifications for the air conditioners
must be ideal and should match the energy-efficient design standards.
Following are the requirements for maintaining a favorable room environment prior to installation:
1. The equipment room should be well insulated and have a sealed damp-proof layer.
2. The outdoor air entering in should be kept at a minimum. The outside air will add the loads of heating, cooling,
humidifying, and dehumidifying of the system. It is recommended that the inhalation of outside air be kept below
5% of the total indoor airflow.
3. All the doors and windows should be properly sealed to minimize the leakage. The seams should be as narrow
as possible.
Vertiv recommends that the site preparation is defined as per the requirements. However, if these requirements are
not met, rectifications must be made on the site so that it complies with the specified requirements and conditions.
However, if the recommended rectifications or modifications are not implemented, then Vertiv does not guarantee the
accuracy and precision of the temperature and humidity provided by the Liebert CR012 models. One important
aspect to be considered is that the indoor unit must not be used for the outdoor environment.
2.2.2 Installation Space requirements
Liebert CR012 air conditioners are advanced precision air cooling units and therefore, these air conditioners must be
installed, preferably in a row of cabinets with high heat density and in a hot aisle and cold aisle arrangement.

Liebert CR012 Precision Air Conditioning User Manual
Chapter 2 Installation 11
Liebert CR012 air conditioners are advanced precision air cooling units and therefore, these air conditioners must be
installed, preferably in a row of cabinets with high heat density and in a hot aisle and cold aisle arrangement.
Allocate space so that it is accessible for the qualified service personnel for repairs, servicing, and maintenance. For
the CR012 range, maintenance space must be allocated at the front and rear of the equipment.
A minimum space of 600mm must be assigned for maintenance in front of the system and at the rear of the system.
The allocated space is to facilitate regular maintenance tasks such as replacement of the filter, fans among others.
Figure 2-5 depicts the space allocated for servicing and maintenance.
600
600
1944
Figure 2-5 maintenance space
Contact the Vertiv for special applications, which would need some modifications to work at an optimal level.
2.2.3 Installation Tools
Table 2-1 shows the generic toolsets and utilities used in the installation and maintenance process:
Table 2-1
Name
Drawing
Name
Drawing
Electric hand drill
Adjustable wrench
Slotted screwdriver
Cross head screwdriver
Stepladder
Forklift
Drill
Wire cutting pliers
Claw hammer
Diagonal cutting pliers
Insulating shoes
Antistatic gloves

Liebert CR012 Precision Air Conditioning User Manual
12 Chapter 2 Installation
Name
Drawing
Name
Drawing
Electrician knife
Cable ties
Insulating tape
Insulating gloves
Crimping pliers
Heat shrinkable tube
Insulated torque wrench
Torque screwdriver
Multimeter
Clip-on ammeter
The tools mentioned in Table 2-1 are generic and commonplace; however, depending on various factors such as site
environment, cables, installation equipment, and on-site electrical connections these tools may vary in a real-time
scenario.
Ensure that the tools used in the installation, operation, and maintenance processes are insulated. This safety
measure is important for professionals and service personnel who work with this CR012 range of air conditioners.
2.3 Mechanical Installation
Proper installation is important to achieve optimal performance and prolong the product life. In this section, the
mechanical installation will be discussed in detail to help the personnel with the installation process.
Before proceeding with the mechanical installation, the following safety precautions need to be considered.
1. Prior to installation, ensure that the installation preparations have been read and implemented as per the
requirement. (Refer to section 2.2 on Installation Preparation for the details). Check if any modifications are
made to the plumbing, wiring, or ventilation facility before mounting the equipment. Once the installation
preparations are taken into consideration, move on to the next step in the installation process, and eventually
set up the system.
2. The CR012 cooling units are designed for split-floor installation. The indoor unit must be installed on the floor of
the equipment room or computer room. The outdoor unit must be installed outdoors or on the floor of the other
rooms as per the building architecture.
3. Industry-wide standards are followed for the selection, layout, and fixing of pipes.
4. Several factors such as pressure drop, compressor oil return, noise reduction, and vibration are considered
during the design and installation process.
5. Follow the design drawings strictly when installing the equipment. Reserve space as per the maintenance and
serviceability instructions in the previous chapter on Installation Preparation. The manufacturer’s engineering
dimension drawings must be taken as a reference while installing the equipment.
2.3.1 System arrangement during installation
The general arrangement of the CR012 air cooled AC unit is depicted in Figure 2-6.

Liebert CR012 Precision Air Conditioning User Manual
Chapter 2 Installation 13
Figure 2-6 System Arrangement
Factory piping
Field piping (by technical personnel)
The following points should be considered before checking out the overall layout diagram:
The single system is used as an example to describe the entire system.
⚫Vertiv staff and qualified professionals lay out the piping in the laboratory.
⚫Piping is done by technicians.
Components (marked with *) are not supplied by Vertiv but are recommended for proper circuit operation and
maintenance.
Additional components (marked with +) are required when the equivalent length exceeds 30m.
2.3.2 System Installation Mode
The installation modes of the CR012 unit are shown in Figure 2-7 and Figure 2-8:

Liebert CR012 Precision Air Conditioning User Manual
14 Chapter 2 Installation
Figure 2-7 Condenser is placed higher than the Compressors during installation
In Figure 2-7, the condenser is installed higher than the compressor. Therefore, an inverted back bend is fitted to the
discharge line and the liquid line of the condenser. The modification is essential as it helps prevent the liquid
refrigerant from flowing back once the condenser stops. The top end of the inverted backbend must be installed
higher than the ultimate level of the copper pipe of the condenser.
However, if the condenser is installed lower than the compressor, then no modification is required.
Figure 2-8 depicts the schematic diagram of system installation when the condenser is installed at a lower level than
the compressor.
Figure 2-8 The Condenser is lower than the Compressor during installation
2.3.3 Product Dimensions
The dimensions and weight of the indoor unit are displayed in Figure 2-9 and in table 2-2.

Liebert CR012 Precision Air Conditioning User Manual
Chapter 2 Installation 15
H
DW
Figure 2-9 Dimensions of an indoor unit
Table 2-2
Model
Dimensions (W ×D ×H) (mm)
Net weight (kg)
CR012HA1380S02E30000PV000
300×1100×2000
210
CR012RA1380S10E30000PV000
215
Base Plate pipe outlet Location & Dimensions
The locations of the pipe inlets and outlets on the unit base plate are shown in Figure 2-10:
a
e
A
B
C
D
E
f
g
b
c
d
F
h
i
FRONT
A: Drainage hole of pump
B: Liquid pipe hole
C: Discharge pipe hole
D: Cable entry hole
E: Inlet hole of humidifier
F: Drainage hole of water tray
Figure 2-10 Base Plate Location for pipe outlets
The following table 2-3 depicts the dimensions of the base plate pipe outlet:
Table 2-3
Model
a
b
c
d
e
f
g
h
I
CR012
-
43
44
130
44
-
-
130
205
Top plate pipe outlet Locations & Dimensions
The locations of the pipe inlets and outlets on the unit top plate are shown in Figure 2-11: