Vertiv Liebert DM Series Manuel utilisateur

Liebert DM Series

Precision Air Conditioner

User Manual

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 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: support@Vertivco.com.

Customer service hotline: 4008876510

•Asia Pacific

Homepage: www.vertivco.com.

E-mail: overseas.support@Vertivco.com

For Technical Support, users may contact the nearest Vertiv Co. local sales office or service

center.

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

Purpose of the Document

This document applies to the Liebert DM 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.

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

Version History

Issue

Revision

Changes

1.0

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Safety Precautions and Measures

The important safety precautions and measures that should be followed during the installation and

maintenance of the Liebert DM 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 life of the machine. The user must read all the

precautions, danger, warnings, and cautionary measures mentioned in the manual prior to

carrying out any operations on the machine. Each machine is equipped with an electric

insulation which allows the users to work in safe conditions. The main switch is positioned on

the 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 be kept by the personnel responsible for the maintenance.

The protective covers can be removed after the electric power has been cut off by opening

the main switch.

In the following section, take a look at 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 that the voltage matches the utility power that is available for that unit.

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

The controller doesn’t isolate power from the unit even in the Off mode. Moreover, some internal

components require and receive power even during the Off 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 fans bay which may result in object

ejection during the fan start-up and there is a probable risk of being hit by these objects leading to grievous

injury as well as causing equipment damage.

The unit contains fluids and gasses 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.

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

TABLE OF CONTENTS

PART I - GENERAL INFORMATION

1 Introduction ......................................................................................................................................................................................... 2

1.1 Model Nomenclature....................................................................................................................................................... 3

1.2 Basic Performance Parameters .............................................................................................................................. 3

1.3 Product Description ........................................................................................................................................................ 4

1.3.1 Compressor ......................................................................................................................................................... 5

1.3.2 Evaporator ........................................................................................................................................................... 6

1.3.3 Thermal expansion valve (TXV) ......................................................................................................... 6

1.3.4 Micro-processing Controller.................................................................................................................. 7

1.3.5 Strainer .................................................................................................................................................................. 7

1.3.6 Filter ......................................................................................................................................................................... 8

1.3.7 Centrifugal Fan................................................................................................................................................. 8

1.3.8 Condenser ........................................................................................................................................................... 8

1.3.9 Sight Glass .......................................................................................................................................................... 9

1.3.10 Infrared Humidifier ..................................................................................................................................... 9

1.4 Optional Components ................................................................................................................................................ 10

1.4.1 Electric Heater ............................................................................................................................................. 10

1.4.2 Remote Monitor ........................................................................................................................................... 10

1.4.3 Energy-Saving Card ...................................................................................................................................11

1.4.4 Power SPD..........................................................................................................................................................11

1.5 Working Conditions................................................................................................................................... 11

1.5.1 Operating Environment ............................................................................................................................ 12

1.5.2 Storage Environment ................................................................................................................................ 13

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

1.5.3 Refrigerant Charging Requirement ................................................................................................ 13

PART II - INSTALLATION

2 Installation .......................................................................................................................................................................................... 15

2.1 Pre-Installation ................................................................................................................................................................. 15

2.1.1 Transportation and Movement ........................................................................................................... 15

2.1.2 Unpacking..........................................................................................................................................................16

2.1.3 Inspection .......................................................................................................................................................... 17

2.2 Installation Preparation (Site Preparation) ................................................................................................. 17

2.2.1 Equipment Room Requirement.......................................................................................................... 17

2.2.2 Installation Space requirements .......................................................................................................18

2.2.3 Installation Tools.........................................................................................................................................20

2.3 Mechanical Installation .............................................................................................................................................. 21

2.3.1 System arrangement during installation..................................................................................... 21

2.3.2 System Installation Mode ..................................................................................................................... 23

2.3.3 Product Dimensions ................................................................................................................................. 24

2.3.4 Outdoor unit ................................................................................................................................................... 25

2.3.5 Indoor Unit Installation ........................................................................................................................... 26

2.3.6 Outdoor Unit Installation ...................................................................................................................... 27

2.3.7 Procedure ......................................................................................................................................................... 27

2.3.8 Piping for AC Unit ...................................................................................................................................... 29

2.3.9 Installation Notes Of Connector ..................................................................................................... 30

2.3.10 Required Pipe Connections............................................................................................................... 31

2.3.11 Connecting Refrigerant Pipe ............................................................................................................. 31

2.3.12 Pipe connector position ...................................................................................................................... 33

2.3.13 Connecting discharge pipe ............................................................................................................... 34

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

2.3.14 Connecting liquid pipe ......................................................................................................................... 34

2.3.15 Connecting Drain Pipe Of Indoor Unit ...................................................................................... 35

2.3.16 Connecting Humidifier Water Supply Pipe (If Applicable) ........................................ 35

2.3.17 Removing Transportation Fastener And Vibration Absorber ................................. 35

2.3.18 Adding Refrigerant For Long Pipe System ........................................................................... 36

2.3.19 Check List ...................................................................................................................................................... 37

2.4 Electrical Installation .................................................................................................................................................. 38

2.4.1 On-site Wire connections ..................................................................................................................... 38

2.4.2 Installation Notes ....................................................................................................................................... 38

2.4.3 Connecting Power Cable Of Indoor Unit ................................................................................... 39

2.4.4 Connecting Power Cable Of Outdoor Unit ............................................................................. 40

2.4.5 Connecting Control Terminals ......................................................................................................... 41

2.4.6 Connecting Monitoring Port Cable ............................................................................................... 45

2.4.7 Connecting Energy-Saving Card .................................................................................................... 45

2.4.8 Checklist ........................................................................................................................................................... 47

PART III - SYSTEM OPERATION & GENERAL MAINTENANCE

3 System Operation ......................................................................................................................................................................... 51

3.1 Start-Up Inspection ....................................................................................................................................................... 51

3.2 Micro-Processing Controller................................................................................................................................. 52

3.2.1 Features ............................................................................................................................................................. 52

3.2.2 Appearance ..................................................................................................................................................... 52

3.2.3 LCD Screen ..................................................................................................................................................... 53

3.2.4 Control Buttons ........................................................................................................................................... 53

3.2.5 Control Buttons Operation Example ............................................................................................ 54

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

3.2.6 ON Screen ........................................................................................................................................................ 55

3.2.7 Language Screen ........................................................................................................................................ 55

3.2.8 Normal Screen .............................................................................................................................................. 56

3.2.9 Password Screen ........................................................................................................................................ 56

3.3 Function Testing ........................................................................................................................................................... 57

3.3.1 Cooling ................................................................................................................................................................ 57

3.3.2 Heating............................................................................................................................................................... 58

3.3.3 Humidifying .................................................................................................................................................... 58

3.3.4 Dehumidifying .............................................................................................................................................. 58

3.3.5 Checking Refrigerant Charge Capacity of Low-Temp Outdoor .............................. 58

3.4 Micro-Processing Controller Menu Options ............................................................................................. 59

3.4.1 Main Menu........................................................................................................................................................ 59

3.4.2 Alarm Menu ................................................................................................................................................... 60

3.4.3 Set Points ......................................................................................................................................................... 63

3.4.4 System Status............................................................................................................................................... 63

3.4.5 System Menu .................................................................................................................................................66

3.4.6 Help Menu ....................................................................................................................................................... 67

3.4.7 Display Set .......................................................................................................................................................68

4 General Maintenance ................................................................................................................................................................69

4.1 Electric Inspection ........................................................................................................................................................ 70

4.2 Indoor Unit Maintenance ........................................................................................................................................ 70

4.2.1 Filter ...................................................................................................................................................................... 70

4.2.2 Fan ......................................................................................................................................................................... 72

4.2.3 Drain Pipe......................................................................................................................................................... 72

4.2.4 Heater ................................................................................................................................................................. 72

Vertiv | Liebert DM Series Precision Air Conditioner | User Manual

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