Vertiv Liebert CRV Plus User manual

Liebert CRV+
Precision Air Conditioner
User Manual

Copyright by Vertiv Co. Ltd.
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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 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 Co., Ltd.
•China
Website: www.vertivco.com
E-mail: [email protected]
Customer service hotline: [phone]
•Asia Pacific
Homepage: www.vertivco.com.
E-mail: [e-mail]
For Technical Support, users may contact the nearest Vertiv Co. local sales office or service center.

Purpose of the Document
This document applies to the Liebert CRV+ series of precision air conditioners and cooling solutions
which maintain an optimal environmental control mainly for testing laboratories, data center rooms and
similar technological ecosystems at minimal operating costs. This document explains the product
description, installation measures, operational workflow, maintenance, and detailed aspects from the user
perspective. The figures used in this document are for reference only.
Please read this manual carefully before installing, maintaining, and troubleshooting, especially the
warning information in the manual
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,
including tips and tweaks. 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 mainstream stuff also comes under
the Note heading helping the users get to grips with the
definitions, concepts, and terminologies used in the manual.
Version History
Issue Revision Changes
1 V1.0 ---

Safety Precautions & Measures
The important safety precautions and measures that should be followed during the installation and
maintenance of the Liebert CRV+ models 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.
The user reads and takes into account all the precautions, compliance, and safety measures before
working on the equipment. 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 lifeofthe machine. The user must read all the precautions,
danger, warnings, andcautionary measures mentioned in the manual prior tocarrying out any operations
on the machine. Each machine isequipped with an electrical insulation, which allows the users to work in
safe conditions. The main switch is positioned onthe electrical panel cover; Open the right door to access
it. Before any maintenance operation, switch off the machine with this electronic insulation device in order
to eliminate risks such as electrical shocks, burns, automatic restarting, moving parts, and remote
control. The panel key, supplied along with the unit, must bekept bythe personnel responsible for the
maintenance. The protective covers can beremoved after the electric power has been cut off by opening
the main switch.
In the following section, take a look atthe various cautionary measures and warnings that need to beread
carefully prior to installing oroperating the system.
Disconnect the local and remote power supplies prior toworking with the unit.
Prior tothe installation process, read all the instructions, verify if all theparts areinplace, and check the
nameplate to ensure that the voltage matches the utility power that isavailable for that unit.
The controller doesn’t isolate power from the unit even in the Off mode. Moreover, some internal
components require and receive power evenduring the Off mode.
If the unit door isopen while the fans are operating, the airflow may result inabrupt slamming ofthe door
resulting in injury. Another aspect is the presence of small objects in the fans bay which may result in
object ejection during the fan start-upand there is aprobable risk ofbeing hit by these objects leading to
grievous injury aswell as causing equipment damage.

The CRV+ unit isolation switch is inside the unit. The line side of this switch contains live high voltage.
In order to ensure there is no voltage inside the unit, install and open a remote isolation switch.
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 sufficient 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 leaking water that can cause damage to the equipment as well as the building. There
should be an effective water drain connection and facilities. Installation should be precise.
Implementation of the application and service practices should be suitable and fault-free. Not complying
with these norms will result in water leakage from the unit. Water leakage can result in massive damage
and loss of critical equipment in the hosting ecosystem. Therefore, care should be taken to ensure that
the unit must not be located directly above any equipment that could sustain damage due to water and
excessive moisture. Using a leak detection system for unit and system supply lines are recommended by
Vertiv Co.

TABLE OF CONTENTS
Chapter 1 Introduction ........................................................................................................... 1
1.1 Model Nomenclature .................................................................................................................... 2
1.2 Basic Performance Parameters................................................................................................. 2
1.3 Product Description .................................................................................................................... 3
1.3.1 DC Brushless Compressor................................................................................................................. 4
1.3.2 Fan ....................................................................................................................................................... 5
1.3.3 Evaporator .......................................................................................................................................... 5
1.3.4 Electronic Expansion Valve (EEV)................................................................................................... 6
1.3.5 Electrode Humidifier ......................................................................................................................... 6
1.3.6 Electric Heater................................................................................................................................... 7
1.3.7 Sight Glass.......................................................................................................................................... 7
1.3.8 Filter Drier........................................................................................................................................... 7
1.3.9 Micro-Controller ................................................................................................................................ 7
1.3.10 Condenser......................................................................................................................................... 8
1.4 Optional Equipment .....................................................................................................................8
1.5 Working Conditions .....................................................................................................................9
1.5.1 Operating Environment ..................................................................................................................... 9
1.5.2 Storage Environment ........................................................................................................................ 9
1.5.3 Refrigerant Charging Requirement............................................................................................... 10
Chapter 2 Installation ........................................................................................................... 12
2.1 Pre-installation ........................................................................................................................... 12
2.1.1 Transportation & Movement........................................................................................................... 12
2.1.2 Unpacking......................................................................................................................................... 13
2.1.3 Inspection ......................................................................................................................................... 14
2.2 Installation Preparation (Site Preparation) ......................................................................... 14
2.2.1 Equipment Room Requirement ...................................................................................................... 14
2.2.2 Installation Space requirements ................................................................................................... 15
2.2.3 Installation Tools............................................................................................................................. 16
2.3 Mechanical Installation ............................................................................................................ 17
2.3.1 System arrangement during installation ...................................................................................... 18
2.3.2 System Installation Mode............................................................................................................... 19
2.3.3 Product Dimensions........................................................................................................................ 20
2.3.4 Installation Procedures .................................................................................................................. 23
2.3.5 Piping................................................................................................................................................ 26
2.3.6 Removing Transportation Fastener and Vibration Absorber ................................................... 34
2.3.7 Checklist for completed mechanical installation........................................................................ 36

2.4 Electrical Installation................................................................................................................37
2.4.1 On-site Wire connections ............................................................................................................... 37
2.4.2 Installation Notes............................................................................................................................ 37
2.4.3 Connecting cables of the Indoor unit........................................................................................... 38
2.5 Commissioning Overview ....................................................................................................... 43
2.5.1 Self Check......................................................................................................................................... 43
2.5.2 Preparations for Startup ................................................................................................................ 44
2.5.3 Startup Inspection .......................................................................................................................... 46
Chapter 3 System Operation & General Maintenance .................................... 50
3.1.1 Micro-Controller ............................................................................................................................... 50
3.1.2 Control buttons................................................................................................................................ 50
3.1.3 Common Operational function examples ..................................................................................... 51
3.1.4 Main Screen...................................................................................................................................... 52
3.1.5 Password interface.......................................................................................................................... 53
3.1.6 Menu Structure................................................................................................................................ 53
3.2 General Maintenance ............................................................................................................... 69
3.2.1 Routine Maintenance & Inspection (Monthly) ............................................................................. 69
3.2.2 Routine Maintenance and Inspection (Half -Yearly) .................................................................. 70
3.2.3 Self-Diagnosing Functions............................................................................................................. 71
3.2.4 Maintenance of Electrical Control utilities .................................................................................. 71
3.2.5 Air Filter Maintenance .................................................................................................................... 73
3.2.6 Fan Kit Maintenance....................................................................................................................... 74
3.2.7 Electrical Heater Maintenance ...................................................................................................... 74
3.2.8 Refrigerating System Maintenance .............................................................................................. 74
3.2.9 Drainage system maintenance...................................................................................................... 74
3.2.10 Troubleshooting ............................................................................................................................ 75
APPENDIX 1 - Circuit Diagrams ............................................................................................................ 79
APPENDIX 2 - Micro-processing Controller Menu Structure................................................................ 82
APPENDIX 3 - Alarm Control Menu Table ............................................................................................ 84
APPENDIX 4 - Hazardous Substances or Elements Declaration .......................................................... 85
APPENDIX 5 - Troubleshooting of Common Startup Faults ..................................................... .. .......... 86
3 .1 System Operation .................................................................................................................... .. 50

PART I
GENERAL INFORMATION

Vertiv | Liebert CRV+|User Manual 1
Chapter 1 Introduction
The Liebert CRV+ series isthe next generation series ofair conditioners that provide precise
environmental control. The Liebert CRV+ models are the latest inthe long line of modern enterprise-
grade products from the Liebert family. Incorporating the high standards associated with the Liebert
name, the CRV+ series utilizes the latest technology, system components, and streamlined
manufacturing process.
Liebert CRV+ air conditioners are products that are specifically created and designed for the small-and-
medium data centers, computer rooms, and similar ecosystems which call for ahigh degree of accuracy
and precision. Itaddresses 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 betaken while testing these sensitive products or maintaining a favorable environment for
mission critical equipment, as even aslight deviation may lead to inaccurate results. Precision Air
Conditioning must not only keep room conditions within a specific range but also must have the
precision to react quickly to a drastic change in heat load and prevent wide temperature fluctuations.
The CRV+ air cooled AC unit is packed with features such as high reliability, high sensible heat ratio, and
large airflow. The unit is an air-cooled single cooling system and configured with DC Speed Regulation
back- inclined centrifugal fan.
Packed with a host offeatures, it lowers the sound emissions significantly and thereby reduces the noise
pollution. Itis a top-notch system that adheres tothe standard in Precision Air Cooling in terms of
energy-efficiency, space requirements, and reliability.
Figure 1-1shows theappearance ofvarious models inthe Liebert CRV+ series:
Figure 1-1 Models in the CRV+ series

Vertiv | Liebert CRV+|User Manual 2
1.1 Model Nomenclature
The model nomenclature of the CRV+ air cooled unit is shown in Figure 1-2:
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
2
5
H
A
1
3
8
O
S
0
2
E
1
0
0
0
0
C
V
0
0
0
Bit 1 and Bit 2 Product Model Bit 14 Filter
CR Liebert CRV+
0
Bit 3 ~ Bit 5 Series Name Description
2
025 Nominal Capacity
G4 with filter clogged switch
G4
Bit 6 Air Discharge
Bit 15 Coil and value
R Horizontal supply with guide grill
E
H
Horizontal supply without guide grill
Standard DX Air Cooled Coiled &
Electronic Expansion Valve (EEV)
Bit 7 System Type
Bit 16 Cabinet Color
A
Air cooled
1 Standard color ( Z-7021 black-grey)
Bit 8Airflow
Bit 17 High Pressure Option
1 EC Fan
0 None
Bit 9 Power Supply
Bit 18 Low Voltage Locking Option
3 380-415V/3 ph/50Hz +N
0 None
T 380/3 ph/60Hz +N
Bit 19 Monitor
Bit 10 System Configuration
0 None
SSIC Card
Bit 20 Detector
8R-410A brushless scroll compressor
0 None
Bit 11 Humidifier
Bit 21 Package
0 None
P Domestic
SElectrode humidifier
C Overseas (sea worthy)
Bit 12 Display
Bit 22 Special Function
L Large Display
A None
S Standard display panel
V With condensate drain pump
Bit 13 Heating
0
1
None
Electrical heater
Figure 1-2 Model Nomenclature
1.2 Basic Performance Parameters
The basic performance parameters of the Liebert CRV+ AC series are given in Table within Listing 1.1.
Listing 1.1
Model Nominal cooling
capacity (kW)
Power
(kW)
Heating capacity
(kW)
Humidification
capacity (kg/h)
CR012 13.6 3.3 2 /
CR025
20.8
6.1
3
1.5
CR035 38.1 10.1 5.5 1.5
Condition: Return air 37˚C, 24%RH & 45˚C condensing temperature
Bit 23~25 Special Identifier for order
0 None

Vertiv | Liebert CRV+|User Manual 3
1.3 Product Description
The Liebert CRV+ cooling unit is a comprehensive system that includes all the main functions
fundamental to precision cooling units such as cooling, humidification, dehumidification, re-heating, air
filtration, condensation management, temperature and humidity control, alarm functions and
compatibility with data communications. Liebert CRV+ 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:
Figure 1-3 Components and their locations

4
Listing 1.2
Item Description Item Description
1 Top electrical entrance 7
Condensate pump
2
Electric box
8
3
Top humidifier water supply
condesate-pump drain 9Bottom electrical entrance
4 Supply and Return 10
Evaporator Coil
5
EC plug fans
11
Compressor
6 Electric heaters
Model Dimensions (W x D x H)(mm)
CR012HA1380S02E10000PV000 300 x 1100 x 2000
CR012RA1380S12E10000PV000
CR025HA1380S02E10000PV000 300 x 1100 x 2000
CR025RA138SS12E10000PV000
CR035HA1380S02E10000PV000 600 x 1100 x 2000
CR035RA138SS12E10000PV000
In the following sections, take alook at the listofcomponents used in the Liebert CRV+ Precision Air
conditioning series.
1.3.1 DC Brushless Compressor
The Liebert CRV+ series models comprise ofa DC Brushless compressor which has ahost of
promising features asmentioned 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 life
time, and better capacity control combined with streamlined energy-efficiency make it an ideal
compressor to bank on for the CRV+ series.
Figure 1-4 shows the image of a DC brushless compressor:
Figure 1-4 DCBrushless compressor
Bottom condensate-pump drain
12
Humidifier
Vertiv | Liebert CRV+|User Manual

Vertiv | Liebert CRV+|User Manual 5
1.3.2 Fan
The EC Fans used in the Liebert CRV+ 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 CRV+ series:
Figure 1-5 EC Fans
1.3.3 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

Vertiv | Liebert CRV+|User Manual 6
1.3.4 Electronic Expansion Valve (EEV)
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.
Designed for modulating control of the refrigerant mass flow with precision
Ensures effective control onsuper-heating atthe end ofthe evaporator
Better lowload capacity
Designed for easy Installation-and-Service
Figure 1-7 depicts the image for the EEV used in the CRV+ Series:
Figure 1-7 EEV
1.3.5 Electrode Humidifier
The Electrode humidifier helps to maintain constant humidity in test chambers and is quite efficient
in small-and medium-load applications.
Figure 1-8 depicts the image ofanElectrode Humidifier:
Figure 1-8 Electrode Humidifier

Vertiv | Liebert CRV+|User Manual 7
1.3.6 Electric Heater
In the CRV+ 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 1-9 shows an image of the Electric Heater:
Figure 1-9 PTC heater
1.3.7 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.
1.3.8 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.
1.3.9 Micro-Controller
The Micro-Controller used in CRV+ 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, high-voltage & low-voltage protection
Phase loss protection
Automatic phase-sequence switching upon the anti - phase and rotate speed control of the
outdoor fan
High-end Fault diagnostic system to facilitate easy equipment maintenance

Vertiv | Liebert CRV+|User Manual 8
Figure 1-10 shows the image of the micro-controller:
Figure 1-10 Display panel of the Controller
1.3.10 Condenser
The Liebert range of air condensers offers many advantages, some ofwhich are listed below:
Sharp and Powerful design
Antirust aluminum cabinets
Low sound levels
High reliability over a wide range of ambient conditions
Figure 1-11 shows the image of the condenser used in the CRV+ series:
Figure 1-11 Condenser
For more information on the condenser, refer to the separate condenser manual which explains the
entire condenser ecosystem in detail.
1.4 Optional Equipment
The Liebert CRV+ series is compatible with multiple temperature/humidity sensors based on the
requirement.
An interesting development is the compatibility with the Liebert CRV+ series models with the Modbus
protocol. Through the configured RS 485 port or TCP/IP port, the CRV+ systems can communicate with
the host computer in addition to remotely taking charge of the host software.

Vertiv | Liebert CRV+|User Manual 9
1.5 Working Conditions
In this section, take a look at the environmental conditions including the Operating and Storage
environment.
1.5.1 Operating Environment
The table in Listing 1.3 defines the Operating environment parameters including the Ambient
Temperature, Protection level, Altitude, and Voltage range.
Listing 1.3
Item
Requirement
Ambient temperature
Indoor 18°C ~ 40°C
Outdoor
CR012: -15°C ~ +45°C, if a low temperature kit is
configured, the lowest outdoor operation
temperature is -34°C
CR025 and CR035: -20°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 Co.
Operation voltage range (380 ~ 415)V ± 10%, 3N ~ 50Hz / 60Hz
1.5.2 Storage Environment
The following table in Listing 1.4 defines the Storage Environment parameters including the ambient
humidity, ambient temperature, and storage time conditions.
Listing 1.4
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

Vertiv | Liebert CRV+|User Manual 10
1.5.3 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. The quality issue due to
the wrong refrigerant oil will result in voiding of the warranty.
Low quality or counterfeit refrigerant will damage the system drastically. Use the refrigerant approved by
Vertiv Co., Ltd. to avoid the system abnormality or damage caused by using other brands of refrigerant.
Listing 1.5 depicts the refrigerant brands, which are approved by Vertiv Co. Ltd.
Listing 1.5
Brand
Logo
Note
DU PONT The DU PONT refrigerant adapts a custom made package
JUHUA