Vertiv Liebert PEX4 Series Bedienungsanleitung

Liebert® PEX4TM Series

User Manual

Precision Air Conditioning

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 specied 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: support@vertiv.com

Customer service hotline: 4008876510

Asia Pacic

Homepage: www.vertiv.com.

E-mail: overseas.support@vertiv.com

For Technical Support, users may contact the nearest Vertiv Co. local sales oice or service centre.

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 specications, installation, commissioning, and maintenance procedures with troubleshooting

from the user perspective. The gures used in this document are for reference only.

Please read this manual carefully before installing, maintaining, and troubleshooting.

Liebert PEX4 Air-cooled precision CRAC is a professional device, 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 dened 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 in-

structions 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, carefully.

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 denitions, concepts, and

terminologies used in the manual.

Version History

Version Revision Date Issue Changes

1.0 08.04.2019

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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 qualied 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 modication 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, danger,

warnings, and cautionary measures mentioned in the manual prior to carrying out any operations on the unit.

Each unit 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; 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 airow may result in abrupt slamming of the door

resulting in injury. Another aspect is the presence of small objects in the fans 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 uids 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 humidiers 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

connection 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 Co.

Vertiv | Liebert PEX4 | User Manual i

Table of Contents

Chapter 1: Product Overview................................................................................................................................................................................1

1.1. Product Introduction................................................................................................................................................................................................1

1.2. Model Description....................................................................................................................................................................................................2

1.4. Components of PEX4 Model ........................................................................................................................................................................4

1.4.1. Cabinet ..................................................................................................................................................................................................................4

1.4.2. Air Filter................................................................................................................................................................................................................4

1.4.3. EC Fans.................................................................................................................................................................................................................4

1.4.4. Inverter Scroll Compressor................................................................................................................................................................4

1.4.5. Oil Return Arrangement....................................................................................................................................................................... 5

1.4.6. EMI Filter.............................................................................................................................................................................................................. 5

1.4.7. Refrigeration Circuit.................................................................................................................................................................................. 5

1.4.8. Electronic Expansion Valve (EEV).............................................................................................................................................6

1.4.9. Evaporator Coil..............................................................................................................................................................................................6

1.4.10. Dehumidication- EC Fan.................................................................................................................................................................7

1.4.11. Remote Air-Cooled Condenser.....................................................................................................................................................7

1.4.12. Water-Under-Floor Sensor................................................................................................................................................................7

1.4.13. Controller............................................................................................................................................................................................................7

1.4.14. Color Display and HMI Features.................................................................................................................................................7

1.4.15. Monitoring.........................................................................................................................................................................................................7

1.5. Additional Features .................................................................................................................................................................................................8

1.5.1. Humidier ...........................................................................................................................................................................................................8

1.5.2. Electrical Heating........................................................................................................................................................................................9

1.5.3. Upow Plenum.............................................................................................................................................................................................10

1.5.4. Long Piping Kit (Air Cooled System) ....................................................................................................................................10

1.5.5. Smoke Detectors.......................................................................................................................................................................................10

Vertiv | Liebert PEX4 | User Manual ii

Table of Contents

1.5.6. Fire Detectors ...............................................................................................................................................................................................10

1.5.7. High-Eiciency Filter...............................................................................................................................................................................11

1.5.8. Low Temperature Kit..............................................................................................................................................................................11

1.6. Operating & Storage Environmental Requirements..............................................................................................................12

1.6.1. Operating Requirements.....................................................................................................................................................................12

1.6.2. Storage Requirements .........................................................................................................................................................................12

Chapter 2: Installation...............................................................................................................................................................................................13

2.1. Pre-installation ...........................................................................................................................................................................................................13

2.1.1. Transportation & Movement............................................................................................................................................................13

2.1.2. Unpacking .......................................................................................................................................................................................................14

2.1.3. Inspection..........................................................................................................................................................................................................16

2.2. Installation Preparation (Site Preparation)................................................................................................................................... 16

2.2.1. Equipment Room Requirements................................................................................................................................................16

2.2.2. Installation Space Requirements ............................................................................................................................................ 17

2.2.3. Maintenance Space Requirement ...........................................................................................................................................18

2.2.4. Installation Tools.......................................................................................................................................................................................19

2.2.5. System Arrangement during Installation.........................................................................................................................20

2.2.6. System Installation Mode................................................................................................................................................................ 22

2.3. Mechanical Installation ....................................................................................................................................................................................24

2.3.1. Indoor Unit Size and Weight (Product Dimension).................................................................................................24

2.3.2. Dimension and Weight of Condenser .................................................................................................................................25

2.3.3. Base Plate Cut-out Position and Dimension.................................................................................................................26

2.3.4. Position and Dimension of Air Outlet on Top Cover.............................................................................................29

2.3.5. Indoor Installation ...................................................................................................................................................................................30

2.4. Installation Considerations...........................................................................................................................................................................32

2.5. Pipe Installation Unit (Air-cooled Units).........................................................................................................................................32

Vertiv | Liebert PEX4 | User Manual iii

Table of Contents

2.5.1. Condensate Drain Piping Connection of the Indoor Unit.................................................................................33

2.5.2. Humidication Inlet Pipe Connection.................................................................................................................................33

2.6. Refrigerant Piping Connection.................................................................................................................................................................35

2.6.1. Refrigerant Piping Connection General Principle.....................................................................................................36

2.6.2. Refrigerant Requirement ................................................................................................................................................................38

2.6.3. Copper Pipe Brazing Requirements......................................................................................................................................39

2.7. Lowering the Fan.................................................................................................................................................................................................... 41

2.7.1. Removing Transportation Fixing Plate of Compressor........................................................................................44

2.7.2. Removing of Fasteners of Infrared Humidier............................................................................................................45

2.7.3. Removing of Fasteners from Electrode Humidier................................................................................................45

2.7.4. Removing Pipe Fasteners................................................................................................................................................................ 47

2.7.5. Installation Inspection ........................................................................................................................................................................47

2.8. Electrical Installation.........................................................................................................................................................................................48

2.8.1. Installation Notes......................................................................................................................................................................................48

2.8.2. Wiring of Indoor Unit............................................................................................................................................................................48

2.8.3. Connecting Control Cables ..........................................................................................................................................................50

2.8.4. Connecting Water-Under-Floor Sensor.............................................................................................................................51

2.8.5. Remote Shutdown .................................................................................................................................................................................51

2.8.6. Customized Alarm Terminal ........................................................................................................................................................52

2.8.7. External General Alarm ....................................................................................................................................................................52

2.8.8. Connecting Solenoid Valve of Pipe Extension Kit (Optional)......................................................................52

2.8.9. Wiring of Condenser.............................................................................................................................................................................53

2.8.10. Connecting Power Cables of Condenser ......................................................................................................................53

2.8.11. Electrical Installation Inspection .............................................................................................................................................55

Vertiv | Liebert PEX4 | User Manual iv

Table of Contents

Chapter 3: Controller Operating Instruction...................................................................................................................................56

3.1. HMI Display.................................................................................................................................................................................................................. 56

3.2. Light Indicator ..........................................................................................................................................................................................................57

3.3. Start-Up Interface..................................................................................................................................................................................................57

3.4. User Menu................................................................................................................................................................................................................... 58

3.4.1. Password Interface................................................................................................................................................................................. 60

3.4.2. Menu ..................................................................................................................................................................................................................62

3.4.3. Alarm Menu...................................................................................................................................................................................................62

3.5. Unit Status...................................................................................................................................................................................................................69

3.5.1. Temperature and Humidity Status..........................................................................................................................................69

3.5.2. Power Information Display .............................................................................................................................................................. 71

3.6. Hardware and Software Information....................................................................................................................................................71

3.7. Remote Monitoring Mode..............................................................................................................................................................................72

Chapter 4: General Maintenance ................................................................................................................................................................73

4.1. Manual Operation Function..........................................................................................................................................................................73

4.2. Electrical Connection Inspection...........................................................................................................................................................73

4.3. Control Component Appearance Inspection.............................................................................................................................74

4.4. Water Leak Detector..........................................................................................................................................................................................75

4.5. Air Filter...........................................................................................................................................................................................................................75

4.6. Fan Kit Maintenance .........................................................................................................................................................................................76

4.7. Infrared Humidier................................................................................................................................................................................................76

4.8. Electrical Heater.....................................................................................................................................................................................................77

4.9. Cooling System ......................................................................................................................................................................................................78

Vertiv | Liebert PEX4 | User Manual v

Table of Contents

Chapter 5: Troubleshooting..............................................................................................................................................................................79

5.1. Componentwise Alarm and Solutions ................................................................................................................................................79

5.1.1. Fan Troubleshooting...............................................................................................................................................................................79

5.1.2. Heating System Troubleshooting ........................................................................................................................................... 80

5.1.3. Compressor and AC System Troubleshooting........................................................................................................... 80

5.1.4. Infrared Humidier Troubleshooting.....................................................................................................................................84

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