Liebert PEX 3 Vert User Manual

Liebert® PEX3

TM

DX Series

User Manual

Precision Air Conditioning

Copyright by Vertiv Co. Ltd.

The content in this document is subject to change without notice. All rights, including rights of translation,

reproduced by printing, copying or similar methods, and even of parts, are reserved. Violators will be liable for

damages. All rights, including rights deriving from patent license or registration of a utility model or design,

are reserved. No part of this document may be reproduced or transmitted in any form or by any means

without the prior written consent of Vertiv Co. Ltd.

Notice

The purchased products, services, and features are stipulated by the contract made between Vertiv Co.,

and the customer. All or part of the products, services, and features described in this document may not be

within the purchasing scope or the usage scope. Unless otherwise 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: [email protected]

Customer service hotline: [phone]

Asia Pacic

Homepage: www.vertiv.com.

E-mail: [email protected]

Australia

Customer service hotline: [phone]

New-Zealand

Customer service hotline: [phone]

For Technical Support, users may contact the nearest Vertiv Co. local sales oice or service 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 PEX3 DX series 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/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 eect on the

reliability of the device and security. Even for practices not related to

physical injury, to avoid equipment damage, performance degradation,

or interruption in service, follow the warning instruction.

Note

• The Note section indicates additional and useful information. It also calls

attention to best practices and industry-best protocols that are

standardized and help make maximum utilization of the resources at

hand. Helpful information related to the product also comes under the

Note heading, helping the users with the denitions, concepts, and

terminologies used in the manual.

Version History

Version Revision Date Issue Changes

1.0 25.08.2019

---

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® PEX3™ Series Precision Air Conditioner | User Manual i

Table of Contents

Table of Contents

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

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

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

1.3. Model Nomenclature ..............................................................................................................................................................................................3

1.4. Components of PEX3 Model ..........................................................................................................................................................................4

1.4.1. Indoor Unit Parts ........................................................................................................................................................................................... 5

1.4.2. 9-Inch Color Display ..................................................................................................................................................................................7

1.4.3. Condenser .......................................................................................................................................................................................................... 8

1.4.4. Remote Monitoring Software .......................................................................................................................................................... 8

1.5. Optional Components ...........................................................................................................................................................................................8

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

1.5.2. 2-stage Electrical Heating .................................................................................................................................................................. 8

1.5.3. Dual Power Supply- ATS ...................................................................................................................................................................... 8

1.5.4. Dual Power Supply- Parallel .............................................................................................................................................................. 8

1.5.5. Plenum Conguration ............................................................................................................................................................................. 9

1.5.6. Dual Power (Interlocked Contactors) ...................................................................................................................................... 9

1.5.7. Large & Small Display ..............................................................................................................................................................................9

1.5.8. IS-UNITY-DP Card Assembly .......................................................................................................................................................... 9

1.5.9. Smoke Detectors .......................................................................................................................................................................................10

1.5.10. Fire Detectors .............................................................................................................................................................................................10

1.5.11. Supply Air Pressure Sensor ............................................................................................................................................................10

1.5.12. Supply Air Temperature Sensor ...............................................................................................................................................10

1.6. Refrigerant Requirement .................................................................................................................................................................................10

1.6.1. Charging Refrigerant ................................................................................................................................................................................11

1.7. Storage & Operating Environment Requirements ...................................................................................................................12

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual ii

Table of Contents

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 ......................................................................................................................................................................................20

2.2.5. System Arrangement during Installation .......................................................................................................................... 21

2.2.6. System Installation Mode ................................................................................................................................................................24

2.3. Mechanical Installation ....................................................................................................................................................................................27

2.3.1. Indoor Unit Size and Weight (Product Dimension) ................................................................................................. 27

2.3.2. Plenum Dimensions (for Upow Unit) ................................................................................................................................ 29

2.3.3. Dimension and Weight of Condenser ..................................................................................................................................29

2.3.4. Base Plate Cut-out Position and Dimension ................................................................................................................29

2.3.5. Position and Dimension of Air Outlet on Top Cover ............................................................................................. 35

2.3.6. Indoor Installation ...................................................................................................................................................................................36

2.3.7. Installing Floor Stand ............................................................................................................................................................................38

2.3.8. Installation of Indoor Unit ................................................................................................................................................................38

2.3.9. Pipe Installation Unit (Air-cooled Units) ........................................................................................................................... 39

2.3.10. Infrared Humidication Inlet Pipe Connection ........................................................................................................ 40

2.3.11. Connection of Copper Pipe (Discharge and Liquid pipe) between

Indoor and Outdoor Unit .................................................................................................................................................................41

2.3.12. Height Dierence Requirements and Equivalent Length Calculation .............................................. 43

2.3.13. Pipe Installation Unit (Water-cooled unit) ....................................................................................................................44

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual iii

Table of Contents

2.3.14. Connection between Water inlet and Outlet Pipe of Cooling Water ..................................................44

2.3.15. Lowering the Fan ...................................................................................................................................................................................46

2.3.16. Removing Transportation Fixing Plate of the Compressor .......................................................................... 49

2.3.17. Removing of Fasteners of Infrared Humidier ..........................................................................................................49

2.3.18. Removing Pipe Fasteners .............................................................................................................................................................50

2.3.19. Installation Inspection .......................................................................................................................................................................50

2.4. Electrical Installation ...........................................................................................................................................................................................51

2.4.1. Installation Precautions .......................................................................................................................................................................51

2.4.2. Wiring of Indoor Unit ............................................................................................................................................................................ 51

2.4.3. Connecting Control Cables ........................................................................................................................................................... 55

2.4.4. Connecting Water-Under-Floor Sensor ............................................................................................................................ 56

2.4.5. Remote Shutdown Control Line Connection ...............................................................................................................56

2.4.6. Customized Alarm Terminal .........................................................................................................................................................56

2.4.7. External General Alarm ...................................................................................................................................................................... 56

2.4.8. Condenser Wiring ................................................................................................................................................................................... 57

2.4.9. Check the Installation .........................................................................................................................................................................58

Chapter 3: Touchscreen Operation ........................................................................................................................................................... 59

3.1. Touchscreen Display and User Interface ....................................................................................................................................... 59

3.2. Touchscreen Status Dial ................................................................................................................................................................................ 61

3.2.1. Dial Background-Color Status Indication ..........................................................................................................................61

3.3. Control Header ........................................................................................................................................................................................................63

3.3.1. Powering-On iCOM and Logging-in/ Unlocking Controls ................................................................................63

3.3.2. Powering-on the Thermal Management Unit .............................................................................................................63

3.3.3. Powering-O the Thermal Management Unit.............................................................................................................65

3.3.4. Logging Out ..................................................................................................................................................................................................65

3.3.5. Setting the Date and Time .............................................................................................................................................................66

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Table of Contents

3.3.6. Searching .........................................................................................................................................................................................................66

3.3.7. Using Context-Sensitive Help .....................................................................................................................................................67

3.3.8. About iCOM Version .............................................................................................................................................................................67

3.3.9. Accessing the User and Service Functions ................................................................................................................... 67

3.3.10. User Menu .................................................................................................................................................................................................... 67

3.3.11. Service Menu ..............................................................................................................................................................................................68

3.3.12. Advanced Menu ......................................................................................................................................................................................69

3.4. User Operation ........................................................................................................................................................................................................ 70

3.4.1. Editing Humidity Setpoints ............................................................................................................................................................70

3.4.2. Editing Temperature Setpoints .................................................................................................................................................70

3.4.3. Viewing Unit Alarms .............................................................................................................................................................................. 71

3.4.4. Silencing an Audible Alarm ............................................................................................................................................................ 71

3.4.5. Acknowledging Alarms ....................................................................................................................................................................... 71

3.4.6. Viewing the Event Log ....................................................................................................................................................................... 72

3.4.7. Viewing Sensor Data ............................................................................................................................................................................ 73

3.4.8. Managing Run Hours for a Component ............................................................................................................................ 73

3.4.9. Setting Run Hours to Zero ............................................................................................................................................................. 73

3.4.10. Viewing Teamwork, Stand-by, Cascade and Operating Status ............................................................... 74

Chapter 4: iCOM Controller Operation .................................................................................................................................................75

4.1. LCD Screen ...................................................................................................................................................................................................................75

4.2. Button and Indicator Panel .......................................................................................................................................................................... 75

4.3. Structure Chart of Control Menu ...........................................................................................................................................................77

4.4. Start-Up Interface .................................................................................................................................................................................................78

4.5. Main Interface ...........................................................................................................................................................................................................78

4.6. User Menus .................................................................................................................................................................................................................79

4.7. Password ....................................................................................................................................................................................................................... 80

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual v

Table of Contents

4.8. Setpoints .......................................................................................................................................................................................................................80

4.9. Event Log ...................................................................................................................................................................................................................... 81

4.10. Graphics ....................................................................................................................................................................................................................... 81

4.11. Set Alarms ................................................................................................................................................................................................................... 82

4.12. Display Setup ......................................................................................................................................................................................................... 83

4.13. Total Run Hrs .........................................................................................................................................................................................................84

4.14. Sleep Mode .............................................................................................................................................................................................................. 86

4.15. Service Info ............................................................................................................................................................................................................... 86

4.16. Active Alarms ......................................................................................................................................................................................................... 86

Chapter 5: Application of INTELLI SLOT ........................................................................................................................................... 87

5.1. Introduction of Host Communication Card ...................................................................................................................................87

5.2. Commissioning Host Communication Component ............................................................................................................ 88

5.2.1. Assigning the Card’s IP Address ............................................................................................................................................... 88

5.2.2. Connect an Ethernet Cable ..........................................................................................................................................................89

5.2.3. Connect a RS-485 Serial Cable ................................................................................................................................................ 90

Chapter 6: System Operation and Maintenance ........................................................................................................................ 91

6.1. Routine Maintenance Inspection Items (Monthly) ................................................................................................................ 91

6.2. Routine Maintenance Inspection Items (Semi-Annual) ................................................................................................. 92

6.3. Self-Diagnostic System .................................................................................................................................................................................. 93

6.4. Check the Electrical Connections and Maintenance ....................................................................................................... 93

6.5. Appearance Inspection and Maintenance of Controller Components ............................................................94

6.6. Air-Cooled Condenser Maintenance Guide ............................................................................................................................... 95

6.7. Water-Cooled Condenser Maintenance Guide ........................................................................................................................ 95

6.8. Filter Maintenance Guide .............................................................................................................................................................................96

6.9. Infrared Humidier Maintenance Guide ..........................................................................................................................................97

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual vi

Table of Contents

6.10. Electric Heater Maintenance Guide .................................................................................................................................................97

Chapter 7: Diagnosis and Maintenance ...............................................................................................................................................99

7.1. Fault Diagnosis and Treatment of Fans ........................................................................................................................................... 99

7.2. Fault Diagnosis and Treatment of Infrared Humidier..................................................................................................100

7.2.1. Infrared Humidier Troubleshooting ..................................................................................................................................100

7.2.2. High-Temp Switch ................................................................................................................................................................................ 101

7.3. Compressor and Refrigeration System - Fault Diagnosis and Treatment ...................................................101

7.4. Heating System - Fault Diagnosis and Treatment ............................................................................................................. 105

Appendix I: Wiring Diagram Infrared Humidier (for Air-cooled) .......................................................................... 106

Appendix II: Wiring Diagram Infrared Humidier (for Water-cooled) ................................................................ 107

Appendix III: Circuit Diagram Dual Power .........................................................................................................................................108

Appendix IV: Menu Structure of iCOM Controller (Users Menus) ......................................................................... 109

Appendix V: Table Names and Content of Harmful

Substances in Products ........................................................................................................................................................................................110

Appendix VI: Routine Maintenance Inspection Items

(Monthly) ............................................................................................................................................................................................................................... 111

Appendix VII: Routine Maintenance Inspection Items

(Semi-Annual) ................................................................................................................................................................................................................... 112

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 1

Product Overview

Chapter 1: Product Overview

1.1. Product Introduction

The ‘Liebert PEX3 series’ is the next generation series of air conditioners that provide precise environmental

control. The Liebert PEX3 models are the latest enterprise-grade products from the Liebert family.

Incorporating the high standards associated with the Liebert name, the PEX3 series utilizes the latest

technology, system components, and streamlined manufacturing process.

Liebert PEX3 air conditioner are specically created and designed for data centers, equipment room, computer

rooms, and similar ecosystems that require high control accuracy in terms of inside environment condition. It

caters to sensitive applications that require a suitable environment for optimal performance. Therefore, care

should be taken while testing these sensitive products or maintaining a favorable environment for mission

critical equipment, as even a slight deviation may lead to inaccurate results. Precision Air Conditioning must not

only keep room conditions within a specic range but also be able to react quickly to a drastic change in heat

load and prevent wide temperature uctuations.

The PEX3 unit comes with the features such as high reliability, high sensible heat ratio, and large airow. It is

an excellent system that adheres to the standards of Precision Air Cooling in terms of energy-eiciency, space

requirements, and reliability.

Air-cooled series

The Liebert PEX air-cooled series air conditioner comprises indoor and outdoor units with the standard

conguration of Liebert PEX condenser unit, it can reduce noise pollution to the minimum while meeting

system cooling requirements through the pressure regulating the fan speed.

Water-cooled series

The Liebert PEX water-cooled series air conditioner uses integrated structure and highly eective brazed-plate

heat exchanger (BPHE), thus it is a compact, eicient and quiet in the operating conditions (only P1030 unit).

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 2

Product Overview

1.2. Model Description

This chapter introduces the model, appearance, components, optional conguration and refrigerant

requirements of Liebert PEX3. The ‘Liebert PEX3 Series Precision Air Conditioner’ (“PEX3” for short hereafter) is

a cooling equipment, a medium-large sized precision environment control system, adapted to the environment

control of the equipment room or computer room, featuring high reliability, high sensible heat ratio and large

airow. The appearance of Liebert PEX3 models are shown in Figure 1-1.

Upflow Model

Downflow Model

Figure 1-1 Liebert PEX3 Models

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 3

Product Overview

1.3. Model Nomenclature

The Liebert PEX3 series model is fully-dened by 25 digits, as represented in Table 1-1.

Table 1-1 Liebert PEX3 Model Nomenclature

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

P 1 0 3 0 D A 1 0 6 H 9 1 2 E 1 D L 0 0 C E 0 3 2

Digit 1,2 Product Model Digit 17 Mains Switch High Voltage Option

P PEX3

0 None

1-2 Number of Modules/ Bays D Main non-Locking Disconnect

Digit 3 Net Cooling Capacity kW P Dual Power Supply Parallel

0-9 Nominal Net Cooling Capacity- kW

A Dual Power Supply Interlocking Contactor

Digit 4 Net Cooling Capacity kW T Dual Power Supply Auto Transfer Switch

0-9 Nominal Net Cooling Capacity- kW

Digit 18 Installation Option

Digit 5 Net Cooling Capacity kW 0 None, Standard Pipe, No Low Ambient Kit

0-9 Nominal Net Cooling Capacity- kW

H Re-heat & Humidity Lockout

Digit 6 Air Discharge

L Air-cooled, Long pipe> 30 m

U Upflow

Digit 19 Monitoring

D Downflow 0 None

Digit 7 System Type 7 Unity Card

A Air Cooled

8 Unity Card*2

W

*

Water Cooled Digit 20 Sensors

Digit 8 Airow

0 None

1 EC Plug Fan

A Supply Air Pressure Sensor

Digit 9 Power Supply S Smoke Sensor

0 400 V/ 3 Ph/ 50 Hz+N

H High Temperature

7 380 / 3 Ph/ 60 Hz+N F Smoke & High Temp

C 208 V/ 3 Ph/ 60 Hz N Supply Air Temperature Sensor

D 230 V/ 3 Ph/ 60 Hz 1 A+S

A 460 V/ 3 Ph/ 60 Hz 2 A+H

8 400 V/ 3 Ph/ 50 Hz 3 A+F

Digit 10 Cooling System 4 N+S

4 Compliant Scroll Dual Circuit, R410A 5 H+N

6 Compliant Scroll Single Circuit, R410A

6 A+N

Digit 11 Humidication 7 H+N+S

0 None 8 A+N+S

H Infrared Humidifier

9 A+H+N

S Electrode Humidier B A+F+N

Digit 12 Display Digit 21 Packaging

9 9-inch HMI Display

P Package- Standard Cardboard and Wooden Pallet

S Small Display

C Packaging– Wooden Crate

L Large Display

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 4

Product Overview

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

P 1 0 3 0 D A 1 0 6 H 9 1 2 E 1 D L 0 0 C E 0 3 2

Digit 13 Re-heating Digit 22 Special Requirements

0 None A SFA- None

1 Electrical Heating Std. 1 Stage

P For Export with Condensate Pump

2 Electrical heating Opt. 2 Stage

E For Export

Digit 14 Filtration Digit 23 Order Identier

2 G4 0 Standard ESP

3 F5 1 50 Pa ESP

Digit 15 Coil and Valves 2 100 Pa ESP

E Standard DX Air Cooled Coil, EEV

3 150 Pa ESP

6 Water-cooled, 2-way valve 4 200 Pa ESP

Digit 16 Enclosure Option Digit 24 Order Identier

1

Standard Color Black Orange Peel Grain

Coating

3 Factory Code

Digit 25 Order Identier

2 White orange peel grain coating

2 Factory Code

6 Color charcoal grey w/ double skin

The standard components are represented in ‘Bold Italic’ font in Table 1-1.

*DX Water-cooled version is applicable for 30 kW.

1.4. Components of PEX3 Model

An overview of the main components, optional components and features of the Liebert PEX3 is mentioned in

this section. Liebert PEX3 components include indoor unit, outdoor unit, and remote monitoring software.

Figure 1-2 shows main components of PEX3 model.

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual

5

Product Overview

No. Description

1 Evaporator Coil

2 Compressor

3 Electrical Panel

4 HMI Display

5 Filter

6 Electronic Expansion Valve (EEV)

7 EC Fan

Figure 1-2 Main Components of PEX3 Model

1.4.1. Indoor Unit Parts

The PEX3 Air-cooled indoor unit includes Compressor, Evaporator, Electronic Expansion Valve, Infrared

Humidier, EC Fan, Electrical Heating, Sight Glass, Filter Dryer and iCOM Controller. The description of the main

components is tabulated in the Table 1-2. In case of the water-cooled series indoor unit also includes BPHE and

MBV (2-way).

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 6

Product Overview

Table 1-2 List of Indoor Unit Components

Component Description

Cabinet

The cabinet frame is constructed from 2.5mm, 2.0mm and 1.2mm folded galvanized steel. The

exterior panels are constructed from 1.2mm zinc coated sheet of steel and insulated with foam

insulation. The cabinet is powder coated in Charcoal Grey color and has a textured nish. The

hinged front doors can be removed, and includes captive 1/4 turn fasteners.

Compressor

Equipped with compliant scroll compressor, it withstands high vibration, and features low noise and

high reliability.

Evaporator

• Uses parallel ow micro-channel evaporator with higher heat transfer eiciency. The material

used for evaporator is Aluminum.

• Detailed design and verication for internal distributor of the evaporator to ensure uniformity of

distribution of the refrigerant, the utilization of the evaporator is considerably improved.

Electronic

Expansion

Valve (EEV)

• The EEV is designed for precision modulating control of the refrigerant mass ow.

• The EEV simultaneously collects temperature and pressure signals to accurately regulate the

refrigerant ow. The EEV’s wide operating envelope also reduces the condensing pressure,

thereby resulting in signicant energy savings.

Infrared

Humidier

• Infrared humidier structure is simple, easy to disassemble, clean and maintain.

• The infrared humidier application reduces the dependence on water quality, it takes a very

short time to start up and reach the humidication requirement, it has the performances like high

humidifying capacity and high eiciency.

EC Fan

• Uses EC fans with PP plastic blade material that enable high eiciency, space-saving, low noise

characteristics.

• The structure of EC fan unit is carefully designed, downow unit adopts a “in-oor” design, this

design can lower the EC fan below the oor to supply air, to further improve the eiciency of air

supply.

Electrical

Heating

Electrical heating features faster heating rate, uniform heating, safety and reliability. The material

used for electrical heating is PTC ceramic heating element and aluminum pipe.

Sight Glass

The windows of the system loop observe the state of the refrigerant, detects the system’s moisture

content. The background color of sight glass changes once the moisture of the system exceeds

permissible limits.

Filter Dryer

It can eectively remove moisture present in the system, while the system is operating for

long-term. To ensure the normal operation of the system removal of impurities is vital.

BPHE (Water

Cooled)

The brazed plate auto-cleansing BPHE is used, where plates are constructed by 316 stainless steel

and brazing material is copper. It features compact structure and high heat exchanging eiciency.

The maximum working pressure for BPHE is 46 bar. Rotalock connections are provided for water

and refrigerant sides.

MBV (Water

Cooled)

The 2-way motorized ball valve is used. The water ow in the BPHE can be regulated through the

intelligent valve position control of the control board, so as to ensure stable system operation, and

the maximum working pressure for MBV is 40 bar.

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 7

Product Overview

Component Description

Long Pipe Kit

The long pipe kit can prevent the refrigerant from returning and concentrating after the compressor

is turned o, ensuring normal start of the compressor and making the system safer. The solenoid

valve is installed internally, and the check valve is supplied loose for installation on site.

iCOM

Controller and

HMI Display

• The standard features available in PEX3 unlike legacy PEX series are the highest capability for

unit control, communication, and monitoring of CRAC units.

• Oers the highest capability for unit control, communication, monitoring of CRAC units.

• Speeds setup and installation and simplies control of CRAC units, putting cooling-system

monitoring and management at customers ngertips.

• Uses a rm touch, or consider a stylus when interacting with the touchscreen.

• User and service menus are password-protected to prevent unauthorized changes to cooling

unit operation.

• The touchscreen is back-lit and auto-dims after a period of non-use, the turns o and touch the

screen to re-illuminate the main screen.

• iCOM ships with default settings for eicient and eective operation of most cooling-units and is

easily congured to meet any requirements.

• iCOM menus and displays are based on the options installed on the cooling units that it monitors

and manages.

• LCD screens with dark-gray backlight and 800x480 pixels.

• Display the real-time values of the CRAC’s status, active and history alarms.

• Self-recovery after power failure.

• It can store up to 400 history event records.

1.4.2. 9-Inch Color Display

PEX3 unit is available with 9-inch touch screen as a standard display, using multi-color 800×480 dot-matrix

liquid crystal touch screen with white backlight as shown in Figure 1-3. The operation of the unit becomes

simpler and more convenient, and the status view of the unit is more visualized.

Figure 1-3 iCOM Controller Display

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Product Overview

1.4.3. Condenser

Two types of condensers are available, for details, refer to “Liebert PEX Condenser User Manual” and “LVC

Series Condenser User Manual”.

1.4.4. Remote Monitoring Software

Liebert PEX3 units interface with the BMS system through Modbus/ SNMP/ BACnet communication protocol

by unity card, which enables Liebert PEX3 to communicate with the host computer and receive the control

instructions from the host software. By default one unity card is congured in the unit, but on the request two

unity cards can be congured.

1.5. Optional Components

1.5.1. Electrode Humidier

The electrode humidier uses the electrodes to boil the water in humidier bottle to produce steam for

humidication purpose. It has a specic (soft water) requirements in terms of water quality and sizes of inlet/

outlet pipes as compared to the standard infrared humidier.

1.5.2. 2-stage Electrical Heating

The 2-stage electrical heating can be selected based on the heating requirement. The electrical heating can

be divided into two stages by conguring the controller. The heater starts step-wise according to the heating

requirement. It not only maintains the room temperature but also reduces the energy consumption.

1.5.3. Dual Power Supply- ATS

The dual power ATS can automatically detect both the power sources (source 1 & source 2). In case of

break-down of the preferred power source, ATS is equipped to automatically switch to the source 2. It can also

provide an output signal associated with power alarm.

1.5.4. Dual Power Supply- Parallel

In dual power supply parallel, there are two sources of power- one is connected through UPS to the fan and

the control board. While, the components such as electrical heating and humidier are connected to other

power source which is directly coupled with the main supply. Hence, the fan and the control board can still be

operated when the main connection fails without aecting the room ventilation.

Vertiv | Liebert® PEX3™ Series Precision Air Conditioner | User Manual 9

Product Overview

1.5.5. Plenum Conguration

All plenums have grills at the outlet to streamline the air-ow movement across the room. The plenum grills

can be manually regulated by changing the direction of air-ow as per the site requirement. In the case of

customized design requirement of the Plenum, contact Vertiv local representative.

1.5.6. Dual Power (Interlocked Contactors)

It consists of dual power supply (interlocking contractor 3P). It uses an automatic power switching circuit

between the common power supply and backup power supply that is activated if an emergency power supply is

required.

1.5.7. Large & Small Display

According to the requirement, Large & Small display are optional, using 480x480 pixel for large display and

128x64 pixels for small display. Both displays have 9 buttons on front board and use the multi-level password

to prevent unauthorized operation. Congure the setpoints of CRAC unit, displays the real-time values of the

CRAC’s status, active and history alarms.

Large Display Small Display

Figure 1-4 Large & Small Display

1.5.8. IS-UNITY-DP Card Assembly

By default, each card supports the Vertiv Protocol, Remote Service Delivery Protocol and HTTP Web. Control

and conguration capabilities are protected by an administrator’s user-name and password combination.

Optionally, status information can be password-protected. The default user-name for the administrator is

‘Liebert’ and the default password is also ‘Liebert’.

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Product Overview

1.5.9. Smoke Detectors

Smoke detection system facilitates the data center to detect smoke in the unique air-ow environment. The

equipment room is outtted with hot and cold aisles, underoor and overhead spaces, each separated to

contain airow within the space. The active smoke detection technique triggers an alarm with the rst sign of

smoke.

1.5.10. Fire Detectors

The re detector can check the eld return air temperature. It triggers re alarm when the smoke level

continues to rise along with elevated room temperature, or the temperature is too high and reaches the re

alarm threshold. The primary purpose of the sensor is to examine the air temperature and to initialize the

anti-re measures installed in the facility.

1.5.11. Supply Air Pressure Sensor

Supply Air Pressure Sensor is only used for downow units. It detects the static pressure under the oor of

equipment room. The controller can read the values of static pressure.

1.5.12. Supply Air Temperature Sensor

Supply Air Temperature Sensor is used to modulate the heating and cooling eect of the unit by controlling

the supply air temperature through plenum. Temperature limits are eld adjustable via display interface. The

heating or cooling warning activates when the temperature exceeds the thresholds.

According to the requirements, Liebert PEX3 series can be provided without heating and humidication

options.

1.6. Refrigerant Requirement

The unit has a specically designed air conditioning system that requires a desired per-specied quality of

refrigerant (R410A) to perform continuously at the most optimum eiciency. For the details on the quantity of

refrigerant to be charged inside the system refer “Section 1.6.1”.

• Do not use inferior quality refrigerant.

• For any consequences resulting from inferior quality refrigerant, Vertiv does not assume warranty

responsibility.

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Product Overview

1.6.1. Charging Refrigerant

Air-cooled series

The Liebert PEX3 air-cooled series air conditioner is charged in the factory with 2 bar nitrogen for shipping.

Table 1-3 and Table 1-4 show the standard refrigerant charge for indoor and outdoor unit respectively.

Table 1-3 Indoor Refrigerant Charge (Unit: kg)

Indoor Model

P1030 P1040 P1050 P1050 P2060 P2070 P2080 P2090 P2100

Single

Circuit

Single

Circuit

Single

Circuit

Double

Circuit

Double

Circuit

Double

Circuit

Double

Circuit

Double

Circuit

Double

Circuit

Standard Charge 3.03 3.32 3.32 2x1.66 2x3.03 2x3.03 2x3.32 2x3.32 2x3.32

Table 1-4 Outdoor Refrigerant Charge (Unit : kg)

Outdoor Model LSF38 LSF42 LSF52 LSF62 LSF70 LSF76 LSF85

Standard Charge 2.99 4.65 6.19 5.64 5.64 7.30 9.73

Outdoor Model LDF76 LDF85 LVC088SE4 LVC106SE4 LVC140SE4 LVC152SE4

Standard Charge 2x3.65 2x4.87 2x4.79 2x6.39 2x6.10 2x7.19

Refrigerant Charge = Charge of Indoor Unit + Charge of Outdoor Unit + (Refrigerant Charge per Unit

Length of Liquid Pipe x Length of Extended Pipe)

Table 1-5 Amount of Refrigerant per Unit Length of Liquid Pipe (Unit: kg/m)

Liquid Pipe OD

(mm)

Refrigerant Charge per Unit

Length of Liquid Pipe (kg/m)

16 0.17

19 0.24

22 0.32

25 0.42

Water-cooled series

The Liebert PEX3 Water-cooled series air conditioner is charged in the factory with 1 bar to 2 bar nitrogen for shipping.

Table 1-6 show the standard refrigerant charge for the unit on-site.

Table 1-6 Indoor Refrigerant Charge Water-cooled (Unit: kg)

Indoor Model

P1030

Single Circuit

Standard Charge 4.0

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Product Overview

1.7. Storage & Operating Environment Requirements

Refer Table 1-7 & Table 1-8 for storage environment and operating environment requirement.

Table 1-7 Storage Environment Requirements

Item Requirement

General requirements Clean room (no dust)

Environment humidity Less than 95% RH (30 °C)

Ambient temperature -25 °C to +55 °C

Storage time

Total transportation and storage time should not exceed six months, otherwise

the performance of the system needs to be re-calibrated.

Table 1-8 Operating Environment Requirements

Item Requirement

Ambient temperature

Indoor temperature: 18 ºC to 35 ºC, Outdoor (air cooling): -15 °C to +45 °C, the

minimum operating of outdoor is -35 °C, when equipped with low temp kit.

Cooling water inlet temperature: 10 ºC to 34 ºC

Protection level (cooling unit) IP20

Altitude <1000 m, derating is required when located altitude is above 1000 m

Operation voltage range 400 V, 3 Ph + N~50 Hz

Please contact Vertiv local representative when operating in the following conditions.

1. The voltage of the air conditioning unit is beyond the range of the operating voltage.

2. The altitude is higher than 1000 m.

3. If the operating condition is not as per Table 1-8.

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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

2.1.1. Transportation & Movement

Railways and shipping are the preferable transport options for the CRAC. If transport by rail or by ship is

unavailable, transport by road is recommended. When selecting road transport, roads without too many bumps

are highly recommended.

• Liebert PEX3 unit is heavy, it is recommended to use the mechanical equipment like electrical forklift to

move the unit.

• Move the equipment to the location near the installation site.

• If an electric forklift is used, insert the tines of the forklift below the pallet as displayed in Figure 2-1.

• Figure 2-1 shows how the forklift tines are inserted underneath the pallet and shows in the same picture the

illustration to the right that the tines should be aligned with the center of gravity to prevent the equipment

from falling over.

Figure 2-1 Moving an Equipment Using a Forklift Truck

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Installation

While moving the indoor unit, keep the obliquity within the range of 75° to 105°, as shown in Figure 2-2.

Figure 2-2 Obliquity of the System

2.1.2. Unpacking

Move the equipment to the location nearest to the nal installation site and unpack it. Follow the procedures

below for unpacking.

• Removal of Paper Packaging

Remove the packaging tape and carton at rst, then remove the top cover followed by dismantling the unit

on the sealing plastic, nally, remove the Honey Comb Paper Board. For better understanding see Figure 2-3.

No. Description No. Description

1 Top Cover 3 Honey Comb Paper Board

2 Remove Top Cover 4 Remove sealing plastic lm and Honey Comb Paper Board

Figure 2-3 Removal of Honey Comb Paper Board

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Installation

• Removal of Wood Packaging

Use a claw hammer or straight screwdriver to straighten the connection hook that holds the side panels to the

top cover, as shown in Figure 2-4.

Figure 2-4 Straightening the Hook

Firstly, straighten all the hooks that hold side panel-I and remove side panel-I. Then straighten all the hooks that

hold side panel-II and remove side panel-II. At last remove top cover-III, as shown in Figure 2-5.

Figure 2-5 Removing Side Panel and Top Cover

• Remove the Base Pallet

The unit is xed onto the base pallet with M8×65 bolts or M8×90 screw, as shown in Figure 2-6 for air-cooled,

it will be same for water-cooled model (single bay ) as well. Use a 17 mm open-end spanner, ratchet spanner or

sleeve to remove the xing bolts.

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Installation

No. Description No. Description

1 Pallet Screw Position Marking 2 Pallet Screw

Figure 2-6 Pallet Screws Fixing Position for Air Cooled

2.1.3. Inspection

Check that the ttings are complete and the components are intact against the packing list. If any parts

are missing or damage is found, please report immediately to the local oices of the carrier and Vertiv local

representative

2.2. Installation Preparation (Site Preparation)

PEX3 series is streamlined for maintaining a favorable environment for equipment rooms, computer rooms,

and similar ecosystems. Strict adherence to the installation procedures is mandatory to ensure that the air

conditioner is installed properly.

2.2.1. Equipment Room Requirements

Before installation, the equipment room must be prepared to ensure a smooth operating ow and to achieve

the expected results. The equipment room must meet the standards, to get proper ventilation and heating.

The design specications for the air conditioners must be ideal and should match the energy-eicient design

standards.

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Installation

Following are the requirements to maintain a favorable room environment prior to the installation.

The Equipment room should have suitable and eective heat insulation.

• The equipment room should have a sealed and damp-proof layer. Polyethylene lm should be used for the

damp proof layer of the ceiling and walls. Alternatively, moisture-proof paint can be used to simulate the

same eect akin to Polyethylene. It is important to ensure that the coating on the concrete wall and oor is

damp-proof.

• Outdoor air signicantly increases the load of heating, cooling, humidication, and dehumidication.

Therefore, all the doors and windows must be closed. Gaps and seams must be very narrow to prevent

the outdoor air from entering the equipment room. It is an industry best practice to keep the inltration of

the outdoor air below 5% of the total indoor airow. Apply appropriate thermal insulation and antifreeze

measures for outdoor water pipes to avoid poor drainage and insuicient water supply caused by freezing.

• Vertiv recommends that the site preparation is dened as per the requirements. However, if these

requirements are not met, Vertiv suggests that rectications to be made on the site in order to comply with

the specied requirements and conditions.

• However, if the rectications or modications are not implemented, then Vertiv does not guarantee the

accuracy and precision of the temperature and humidity provided by the unit.

2.2.2. Installation Space Requirements

Adequate installation space for the indoor unit must be provided. The indoor unit of the PEX3 DX product must

be installed on the oor of Equipment room or Computer Room and the outdoor unit must be installed outside

data center, open to the external ambient.

• Do not use the indoor unit in the open and severe outdoor environment.

• Avoid locating the indoor unit in concave or narrow areas, which can obstruct the airow, shorten the

cooling cycle and result in air return short cycle and air noise.

• Avoid locating multiple indoor units close to each other. This can result in short cycle of air and create

load imbalance.

• Do not install the unit within the vicinity of any other precision cooling equipment to prevent the leakage

of condensed water produced due to imbalance load condition.

• Do not install other devices (such as smoke detector) over the indoor cabinet

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Installation

2.2.3. Maintenance Space Requirement

When installing the unit, a minimum maintenance space of 1100 mm must be reserved in-front of the air

conditioning unit. The required maintenance space for air-cooled unit is shown in Figure 2-7 and for

water-cooled unit see Figure 2-8. Refer Table 2-1 for maintenance spaces of both types of unit models.

Figure 2-7 Maintenance Space of Unit for Air-cooled Unit

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Installation

Figure 2-8 Maintenance Space of Unit for Water-cooled Unit

Table 2-1 Normal Maintenance Space (unit: inch/mm)

Product Type

Front

mm inch

P1030 900 35.4”

P1030 (For Water-cooled) 900 35.4”

P1040~P1050 1100 43.3”

P2060~P2070 900 35.4”

P2080~P2100 1100 43.3”

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Installation

2.2.4. Installation Tools

The following Table 2-2 shows the generic tool sets and utilities used in the installation and maintenance

process.

Table 2-2 List of Generic Tools

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 Anti-static gloves

Electrician knife Cable ties

Insulating tape Insulating gloves

Crimping pliers Heat shrinkable tube

Insulated torque wrench Torque screwdriver

Multi-meter Clip-on ammeter

The tools mentioned in Table 2-2 are generic and commonplace; however, depending on various factors such as

site environment, local rules and regulations, cables, installation equipment, and on-site electrical connections

these tools may vary in a real- time scenario.

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Installation

Ensure that the tools used in the installation, operation, and maintenance processes are well insulated.

2.2.5. System Arrangement during Installation

The piping for the refrigerant is needed for the indoor and outdoor unit of the air-cooled system. The system

arrangement diagram of the refrigeration system is shown in Figure 2-9.

Figure 2-9 Air-cooled System Arrangement Diagram

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Installation

List of the components of system arrangement diagram (Figure 2-9) is given in the below table.

No. Description No. Description

1 Check valve 11 LP switch

2 EC/ AC fan 12 Suction temperature sensor

3 Condenser Coil 13 Evaporator coil

4*

Oil trap (mounted one at every rise of 7.5 m) 14 EC fan

5 Shuto valve 15 Electronic Expansion Valve

6 Discharge temperature switch 16 Sight glass

7 HP Switch 17 Filter dryer

8 Scroll Compressor 18 Solenoid valve

9 Schradar Valve 19 Shuto valve

10 LP transducer

The following points should be considered before checking out the overall layout diagram

• : Factory piping

• : Field piping (by technical personnel)

• The single system is used as an example.

• Components (marked with *) are not supplied by Vertiv but are recommended for proper circuit operation

and maintenance.

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Installation

The system arrangement diagram of the refrigeration system for water-cooled is shown in Figure 2-10

No. Description No. Description

1 Discharge temperature switch 10 Electronic expansion valve

2 HP switch 11 Sight glass

3 Scroll compressor 12 Filter dryer

4 Schrader valve 13 HP transducer

5 LP transducer 14 Welding port of water inlet

6 LP switch 15 Welding port of water outlet

7 Suction temperature sensor 16 Motorized ball valves (MBV)

8 Evaporator coil 17 BPHE

9 EC fan

Figure 2-10 Water-cooled System Arrangement Diagram

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Installation

2.2.6. System Installation Mode

The system installation schematic diagram explains the process of installation for the outdoor unit.

No. Description No. Description

1 Outdoor unit 7 Thermal isolated layer under oor

2 Inverted traps (higher than the top copper pipe of condenser) 8 Slob

3 Liquid pipe (avoid direct sunshine) 9 Humidier supply pipe

4 Oil trap (oil storage bend) 10 Condensate drain pipe

5 Discharge pipe slope 11 Raised oor

6 Sealed 12 Indoor unit

Figure 2-11 The Outdoor Unit is Placed Higher than the Compressors during Installation

The outdoor unit should be installed at higher position than the compressor, therefore, an inverted backbend is

connected to the discharge line and the liquid line of the condenser. The modication is essential as it prevents

the liquid refrigerant from owing back once the compressor stops. The top end of the inverted backbend

should be installed higher than the ultimate level of the copper pipe of the outdoor unit. However, if the outdoor

unit is installed lower than the compressor, then no modication is required.

The illustration in Figure 2-11 depicts the schematic diagram of system installation when the outdoor unit is

installed at a higher level than the compressor and Figure 2-12 when the outdoor unit is installed at a lower level

than the compressor.

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Installation

No. Description No. Description

1 Outdoor unit 6 Slob

2 Liquid pipe slope 7 Condensate drain pipe

3 Sealed 8 Humidier supply pipe

4 Discharge Pipe slope 9 Raised oor

5 Thermal isolation layer under oor 10 Indoor unit

Figure 2-12 The Outdoor Unit is Placed Lower than the Compressor during Installation

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Installation

Figure 2-13 shows the arrangement of cooling water system, which requires the water hotter than 10 °C. Use

heaters if the water source in site cannot meet this requirement. The cooling tower should be a cooled loop

system.

Figure 2-13 Arrangement of Water-cooled System

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Installation

List of the components of system arrangement diagram (Figure 2-13) is given in the below table.

No. Description No. Description

1 Closed cooling tower 7 Liebert PEX3 unit

2 Exhaust water valve 8 Pump

3 Strainer 9 Temperature gauge

4 Drain valve 10 Manometer

5 Filter 11 Supplementary valve

6 Ball valve 12 Expansion water tank

2.3. Mechanical Installation

2.3.1. Indoor Unit Size and Weight (Product Dimension)

The dimensions and operational weight of the indoor units are depicted in Figure 2-14 & Figure 2-15 and

Table 2-3 respectively.

Figure 2-14 Upflow Indoor Unit

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Installation

Figure 2-15 Downow Indoor Unit

Table 2-3 Indoor Unit Size and Weight

Product Number

Dimensions (W×D×H)

Operational Weight

(kg)

mm inch

P1030U/ DA 930 × 995 × 1975 36.6”×39.2”×77.7” 360

P1030U/ DW 930 × 995 × 1975 36.6”×39.2”×77.7” 390

P1040 1130 × 995 × 1975 44.5”×39.2”×77.7” 420

P1050 (S) 1130 × 995 × 1975 44.5”×39.2”×77.7” 440

P1050 (D) 1130 × 995 × 1975 44.5”×39.2”×77.7” 470

P2060 1830 × 995 × 1975 72.0”×39.2”×77.7” 660

P2070 1830 × 995 × 1975 72.0”×39.2”×77.7” 670

P2080 2230 × 995 × 1975 87.8”×39.2”×77.7” 740

P2090 2230 × 995 × 1975 87.8”×39.2”×77.7” 770

P2100 2230 × 995 × 1975 87.8”×39.2”×77.7” 780

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Installation

2.3.2. Plenum Dimensions (for Upow Unit)

The dimensions of the Plenum as follows, refer Table 2-4.

Table 2-4 Plenum Dimensions

Types

D (depth) W (width) H (height)

mm inch mm inch mm inch

P1030 995 39.2” 930 36.6”

400,

600 (optional)

15.8”,

23.6” (optional)

P1040~P1050 995 39.2” 1130 44.5”

400,

600 (optional)

15.8”,

23.6” (optional)

P2060 ~ P2070 995 39.2” 1830 72.1”

400,

600 (optional

15.8”,

23.6” (optional)

P2080 ~ P2100 995 39.2” 2230 87.8”

400,

600 (optional

15.8”,

23.6” (optional)

If the height of the plenum selected for air conditioner unit exceeds 23.6”/ 600 mm, consult Vertiv local

representative for non-standard requirement.

2.3.3. Dimension and Weight of Condenser

Refer to the “Liebert PEX Condenser User Manual” and “LVC Series Condenser User Manual”.

2.3.4. Base Plate Cut-out Position and Dimension

The cut-out position and dimensions are shown in Figure 2-16, Figure 2-17 and Figure 2-18.

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Installation

No. Description No. Description

1 Liquid pipe inlet 4

Inlet of humidication inlet pipe ø35

2 Discharge outlet 5

Cable inlet ø50

3

Condensate drain outlet ø35

Figure 2-16 The Position of Pipe Bottom Outlet of Single Cabinet Unit (unit: mm)

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Installation

No. Description No. Description

1 Liquid pipe inlet 4

Inlet of humidication inlet pipe ø35

2 Discharge outlet 5

Cable inlet ø50

3

Condensate drain outlet ø35

Figure 2-17 The Position of Pipe Bottom Outlet of Dual Cabinet Unit (unit: mm)

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Installation

No. Description No. Description

1

Cable Entry ø52

4

Humidier inlet nozzle ø35

2

Single cable inlet ø25

5

Liquid pipe inlet ø60

3

Condenser drain pipe ø35

6 Discharge inlet

Figure 2-18 Left and Right Panel with Nozzle Position of Cut-out Location Dimensions (unit: mm)

The equipment has knock-outs, ensure to mount sleeve to the cable holes to avoid cutting of the cables.

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Installation

Figure 2-19 and Figure 2-20 show the cut-out position and dimensions of water-cooled unit.

No. Description No. Description

1

Water pipe inlet ø50

4

Inlet of humidication inlet pipe ø35

2

Water pipe outlet ø50

5

Condensate drain outlet ø35

3

Cable inlet ø50

Figure 2-19 The Position of Pipe Bottom Outlet of Single Cabinet Unit (unit: mm)

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Installation

No. Description No. Description

1

Cable entry ø35

4

Humidication inlet nozzle ø35

2

Single cable inlet ø25

5

Water pipe outlet ø60

3

Condensate drain pipe ø35

6

Water pipe inlet ø60

Figure 2-20 Left and Right Panel with Nozzle Position of Cut-out Location Dimensions (unit: mm)

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Installation

2.3.5. Position and Dimension of Air Outlet on Top Cover

The position and dimensions of air outlet on the top cover of upow for single bay (air-cooled/ water-cooled)

and two bay units are shown in Figure 2-21 and in Table 2-5 respectively.

No. Description No. Description

1 Top view of the single bay unit 2 Top view of the double bay unit

Figure 2-21 The Position of Air Outlet on Top Cover Upow Unit

Table 2-5 Dimensions of Air Outlet on Top Cover of Upow Unit

Types of Model

A B C

D

mm inch mm inch mm inch mm inch

P1030 850 33.5” 850 33.5” 900 35.4”

950 37.4”

P1040~P1050 1050 41.3” 850 33.5” 1100 43.3”

950 37.4”

P2060~P2070 850 33.5” 850 33.5” 1800 70.9”

950 37.4”

P2080~P2100 1050 41.3” 850 33.5” 2200 86.6”

950 37.4”

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Installation

2.3.6. Indoor Installation

• Floor Stand

The oor stand is to be prepared by the installation team according to the dimensions, weight, and height of the

unit to ensure that the structure is rigid, the oor stand should be sized according to Figure 2-22 for single bay

unit (Air/ Water-cooled Unit) and Figure 2-23 for two bay unit and Table 2-6.

No. Description No. Description

1 Upper rubber damping pad (5 mm thick) 4 Bottom plate (100 mm x 100 mm x 5 mm, 4PCS)

2 Fixed steel plate (3 mm thick 4PCS) 5 Bottom rubber cushion (10 mm thick, 4PCS)

3 Incline tie joint (angle steel 3 mm thick)

Figure 2-22 Floor Stand of the Single Unit

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Installation

No. Description No. Description

1 Upper rubber damping pad (5 mm thick) 4 Bottom plate (100 mm x 100 mm x 5 mm, 6PCS)

2 Fixed steel plate (3 mm thick 6PCS) 5 Bottom rubber cushion (10 mm thick, 6PCS)

3 Angle steel (3 mm thick)

Figure 2-23 Floor Stand of the Double Unit

Table 2-6 Floor Stand Dimensions (inch/mm)

Model A B C D E F H W

P1030 ~ P1040

25.6”/

650

33.9”/

860

/

38.6”/

980

36.6”/

930

/ 15.7”/400 <H≤21.6”/550 1.6”/40

F≤9.4”/240 21.7”/550 <H≤43.3”/1100 2.0”/50

P1050

33.5”/

850

/

44.5”/

1130

/ 15.7”/400 <H≤21.6”/550 1.6”/40

F≤9.4”/240 21.7”/550 <H≤43.3”/1100 2.0”/50

P2060 ~ P2080

61.0”/

1550

25.6”/

650

72.0”/

1830

/ 15.7”/400 <H≤21.6”/550 1.6”/40

F≤9.4”/240 21.7”/550 <H≤43.3”/1100 2.0”/50

P2090 ~ P2100

76.8”/

1950

33.5”/

850

87.8”/

2230

/ 15.7”/400 <H≤21.6”/550 1.6”/40

F≤9.4”/240 21.7”/550 <H≤43.3”/1100 2.0”/50

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2.3.7. Installing Floor Stand

Determine the installation position according to the space requirements of the unit, and x the oor stand

onto the selected mounting position. The oor stand is xed to the ground using expansion bolts or spot

welding, and the alignment of the oor stand is calibrated by a horizontal ruler before it is xed. Ensure that the

top surface of oor stand is at uniform level. While designing and installing the downow unit which requires

lowering of EC fan, we must consider the proper gap distance and the base strength of the oor stand.

• Refer to Table 2-6 A/B/C as the center of the base from the mounting hole D/ E is the size of the base

frame.

• H is the height of the base, F is the height of the welding beam.

• W is the width of the angle, height ≤ 550 mm recommended use size 40 mm x 40 mm x 3 mm, the height

of > 550 mm quadrangular column is recommended to use 50 mm x 50 mm x 4 mm specication. The

bottom plate is recommended to use 100 mm x 100 mm x 5 mm.

• For the downow unit, the base must be greater than the height of 400 mm.

• For the upow unit, the base height must be about 200 mm.

• The side panels are suspended to the frame of the unit, ensure that oor stand should bear the weight of

the panels.

• The distance between the obstacles that may obstruct the air supply around the upper edge of the base

and the outer edge of the EC fan shall be greater than 160 mm.

Vibration Absorption Treatment

Place a layer of rubber cushion on the top, side of the base and on the bottom of the steel plate respectively to

prevent transmission of vibration during operation of the unit. Refer Table 2-7 for more details.

Table 2-7 Dimensions of Rubber Cushion for Vibration Absorbing

Item Specication

Rubber

cushion

Top Thickness: 3 mm to 5 mm

Lateral Thickness: 2 mm to 3 mm

Bottom Thickness: 10 mm to 12 mm

2.3.8. Installation of Indoor Unit

The indoor unit should be installed on the horizontal base plate, and ensure that all indoor units are at the same

level. The indoor unit and the horizontal base do not require any welding or other xed rigid connections.

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Installation

2.3.9. Pipe Installation Unit (Air-cooled Units)

There are four kinds of pipe to be joint as follows:

• Condensed drain piping connection of the indoor unit

• Humidier inlet pipe connection

• Connection of the copper pipe (discharge and liquid pipe) between the indoor and outdoor unit.

• Long piping kit.

The following points need to be taken into consideration during the piping process:

• All the joints of the refrigerating pipes must be silver-brazed.

• The selection, layout, and xing of the pipes should comply to the industry standards and norms.

• Vacuum pumping and refrigerant charging operations, and procedures must comply with the industry

standards.

• Pressure drop, compressor oil return, noise, and vibration must be considered during the designing and

installation process.

Condensed Drain Piping Connection of Indoor Unit

The condensate of Infrared humidier and evaporator are connected by a cross connector and drained through

the drain pipe, as shown in Figure 2-24 The pipe outer diameter is 25 mm. If the drain pipe is used by three or

more units, the minimal pipe outer diameter should be 40 mm.

When connecting the drain pipe, ensure that the U bend is installed vertically and the ‘U’ shape is not

distorted, so that the condensate can be drained immediately and eectively.

Because the Infrared humidier contains hot owing water, the water pipe must be resistant to heat higher

than 90 °C.

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Installation

No. Description No. Description

1 From evaporated condensed water pan 4 Cross connector

2 Hose clamp 5 From evaporated condensed water pan

3 To condensate drain pipe 6 From infrared humidier water pan

Figure 2-24 Connection of the Drain Pipe of Condensate Water

2.3.10. Infrared Humidication Inlet Pipe Connection

Requirements for connecting the water inlet pipe of infrared humidier:

• To facilitate maintenance, an isolation valve should be tted to the water inlet pipe.

• Ensure that the water inlet pipe is sealed properly to prevent leakage. The Infrared humidier reserved a 1/4”

copper nut and the 1/4” × 1/2” conversion copper thread connector to avoid loose connection as shown in

Figure 2-25 for air-cooled and water-cooled units.

• Where the main line pressure may exceed 700 kPa (the main line pressure range should be

100 kPa to 700 kPa), a pressure reducer should be installed.

• Where the pressure of the main pipe is lower than 100 kPa, there should be a water collecting tank and a

water pump system.

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Installation

No. Description No. Description

1 Outlet joints 2 Inlet pipe

Figure 2-25 Water Inlet Pipe of Infrared Humidifier

2.3.11. Connection of Copper Pipe (Discharge and Liquid pipe) between Indoor and

Outdoor Unit

• Select the appropriate dimension (Pipe diameter & Wall thickness) of pipes connecting the indoor and the

outdoor unit. Considering the eect of the diameter and wall thickness of copper piping on the pressure

drop of the system, the pipe dimensions of the indoor and outdoor unit should be determined according to

the specications in Table 2-9 or consult Vertiv local representative. The recommended dimensions of piping

is given in Table 2-8.

• Connect the copper pipes in brazing mode. The connection ball valves of the discharge pipe and liquid pipe

of the indoor unit are shown in Figure 2-26. Notes and instruction labels are pasted onto the base and the

side panel close to the ball valve. Ensure that the ball valve must be wrapped with a wet cloth before brazing

to protect the label from burning.

• Connect the discharge pipe and liquid pipe of the indoor unit according to the instructions on the labels.

• Horizontal sections of the discharge pipe should be sloped down from the compressor with a slope of at

least 1:200 (5 mm down for each 1 m run). The discharge pipes should be insulated where they are routed in

the conditioned space (including under a raised oor).

The exposure time of system pipes must not exceed 15min. Longer exposure will lead to the

compressor refrigeration oil being aected by moisture, which can aect the life of the key components and

the system operation stability.

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Installation

No. Description No. Description

1 Discharge ball valve 4 Liquid pipe ball valve

2 Liquid pipe ball valve 5 Double circuit

3 Discharge ball valve 6 Single circuit

Figure 2-26 Locations of Discharge Pipe and Ball Valve and Liquid Pipe Ball Valve

Table 2-8 Recommended Pipe Size

Model

P1030

(single system)

P2060

(dual system)

P1040

(single system)

P2080

(dual system)

P1050

(single system)

P2100

(dual system)

P1050

(dual system)

P2070

(dual system)

P2090

(dual system)

Pipe

Length

D L D L D L D L D L D L

10m 16/16 16/16 19/19 16/16 19/19 19/19 16/16 16/16 19/19 16/16 19/19 19/19

20m 19/19 16/16 22/22 16/16 22/22 19/19 16/16 16/16 19/19 16/16 22/22 19/19

30m 19/19 16/16 22/22 16/16 25/22 19/19 19/16 16/16 22/19 16/16 22/22 19/19

40m 22/19 16/16 25/22 16/16 25/25 19/19 22/16 16/16 25/19 16/16 25/22 19/19

50m 22/19 16/16 25/22 16/16 25/25 19/19 25/16 16/16 25/19 16/16 25/22 19/19

60m 25/19 16/16 25/22 16/16 25/25 19/19 25/16 16/16 28/19 16/16 28/22 19/19

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• D: Discharge line, L: Liquid line

• 22/ 19: horizontal pipe diameter is 22 mm, vertical pipe diameter is 19 mm

• If the pipe length exceeds 60 m or drops over 20 m, please consult Vertiv local representative for details.

• If the outdoor temperature is below -20 °C, use the low temperature kit and consult Vertiv local

representative for details.

Table 2-9 Pipe Wall Thickness Requirements

Pipe Dimensions Outer Diameter Wall Thickness (mm)

mm inch mm inch

16 5/8 ≥1 0.04”

19 >3/4 ≥1.2 0.05”

22 7/8 ≥1.2 0.05”

25 1 ≥1.5 0.06”

28 1-1/8 ≥1.5 0.06”

32 >1-1/4 ≥1.5 0.06”

35 1-3/8 ≥1.5 0.06”

2.3.12. Height Dierence Requirements and Equivalent Length Calculation

The long piping kit is the standard component for Liebert PEX3. Height dierence between the indoor

and outdoor unit is shown in Table 2-10. The equivalent length can be calculated by selecting appropriate

dimensions in accordance with the respective diameter, refer Table 2-11 for the equivalent length of the

sub-assembly.

Table 2-10 Height Distance between Indoor and Outdoor Unit

Relative Position Distance

Condenser above the indoor unit + 20 m

Condenser below the indoor unit -5 m

• If the vertical distance between indoor and outdoor unit exceeds the values in Table 2-10, consult

Vertiv local representative.

• ‘U’ trap should be installed for every 7.5 m of vertical distance consult Vertiv local representative for details.

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Table 2-11 Equivalent Length of Each Sub-Assembly

Fluid Pipe Diameter

(inch)

Equivalent length (m)

Elbow 90° Elbow 45° T-piece

3/8 0.21 0.10 0.76

1/2 0.24 0.12 0.76

5/8 0.27 0.15 0.76

3/4 0.3 0.18 0.76

7/8 0.44 0.24 1.1

1-1/8 0.56 0.3 1.4

2.3.13. Pipe Installation Unit (Water-cooled unit)

There are three kinds of pipe to be joint as follow:

1. Condensed drain piping connection of the indoor unit (the same as the Air-cooled unit).

2. Humidier inlet pipe connection (the same as the Air-cooled unit).

3. Water inlet and outlet pipe of cooling water.

The following points need to be taken into consideration during the piping process:

• The selection, layout, and xing of the pipes should comply to the industry standards and norms

• Vacuum pumping and refrigerant charging operations, and procedures must comply with the industry

standards.

2.3.14. Connection between Water inlet and Outlet Pipe of Cooling Water

Each water cooled cooling system uses a BPHE and an MBV. The water supply (inlet) pipe and water return

(outlet) pipe of the cooling water should be connected to the system. A lter (Filter mesh: 1mm) and motorized

isolation valves should be mounted on the water supply (inlet) pipe of the cooling water, and this motorized

isolation valve acts as a balancing valve. The cooling water system with a balancing valve can control the water

distribution more accurately and it also enhances the eiciency of pump.

On the other hand, the motorized valve can keep the optimal condensing temperature by regulating the internal

water ow. The actuator of the regulating valve also features a manual override to allow water side balancing

by the installer. It is recommended to arrange the cooling water piping separately for dierent systems, so that

repairing one pipe will not aect the operation of the other piping.

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Installation

The water pressure should be high enough to overcome the pressure drops created by all the components of

the water system. In addition, because of the sediments and impurities more pressure drop can occur after long

term operation, user should arrange a redundancy of 20% to 25% when selecting the pump. Inlet water pressure

of 0.1 MPa to 0.3 MPa is recommended, but the water ow of the system should be guaranteed.

Refer Figure 2-10 for the system arrangement of the water-cooled unit. The material used for the cooling water

inlet and outlet piping of the indoor unit is copper with outer diameter of 32 mm.

As shown in Figure 2-27 connect the pipes through direct brazing at the site and ensure that the junction is

well-sealed.

No. Description No. Description

1 Water outlet 3 BPHE

2 Water inlet 4 A lter with motorized ball valve

Figure 2-27 Unit Connection (Water-cooled)

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2.3.15. Lowering the Fan

Before commissioning, the EC fans of the downow unit must be lowered. The downow unit is equipped with

a lowering tool when it is shipped. The lowering tool that uses winch is shown in Figure 2-28 for air-cooled and

water-cooled unit. It mainly includes, winch bracket, hook, sling, hand winch, handle, and a L-shaped lifting

component.

No. Description No. Description

1 Winch bracket 4 Handle

2 Hook 5 Sling

3 Winch

Figure 2-28 Fan Elevator Assembly (Winch mode)

• Lowering Procedure

1. Installing lift and lowering kit for fan: Open the unit maintenance cover, check the xing bolts (refer, total

two PCS) of the L-shaped lifting component to ensure that it is xed properly, and then install the xing bolts

(total four PCS) of the winch bracket, as shown in Figure 2-29.

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Installation

No. Description No. Description

1 Winch bracket 5 Bolt

2 Lifting rope 6 Fan

3 Winch 7 Hoist hanging hole

4 Winch handle 8 Lifting fastener

Figure 2-29 Installed Winch Bracket

2. Turn the handle and use the winch hook to hook the L-shaped lifting component to the middle round hole

(refer Figure 2-30). Adjust the handle until the sling is completely tight.

3. Cut the cable tie that binds the fan cables to ensure that the cable length meets the fan lowering

requirements, and then remove the xing bolts (refer Figure 2-30, total four PCS) for fan lowering.

4. Hold the winch handle rmly, and then turn the handle counterclockwise to lower the fan. The status after

the fan has been lowered is shown in Figure 2-31.

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Installation

No. Description

1 Bolt

Figure 2-30 Position of Fixing Bolt

5. Install the xing bolts, as shown in Figure 2-30 and hold the arrangement tight during operation with total

four PCS of bolts.

No. Description No. Description

1 Fan mounted roof 3 The unit bottom

2 Bolt

Figure 2-31 Lowered Fan

6. Remove the hook from the L-shaped lifting component, turn the handle clockwise, arranged the sling in

order and remove the xing bolts (refer Figure 2-30: Position of Fixing Bolt, totally two PCS) of the winch

bracket, and take out the winch and the bracket assembly.

7. Remove the xing bolts of the L-shaped lifting component and take out the L-shaped lifting component. At

this point, the operation of lowering the fan of the one-bay unit is complete. For the unit with two fans, lower

the other fan too, using the fan elevator assembly. The requirements are as follows:

8. Repeat steps 1-7 of the one-bay unit to lower the other fan.

9. After lowering all fans, arrange the fan cables in the correct order and x them using a cable tie.

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Installation

10. Conrm whether the EC fan has been lowered and installed and ensure that the blade does not touch the

fan housing when the fan rotates.

2.3.16. Removing Transportation Fixing Plate of the Compressor

Damping cushions are added to the compressor base to reduce the vibration and noise during operation.

However, such method cannot best withstand the vibration while transporting the unit and may result in

loosening connections and wearing of certain parts. Hence to ensure the rigidity of the compressor during

transportation, three L-shaped xing plates are added to the compressor base.

• Remove the three L-shaped xing plates after installation, and then restore the bolts and washers in

reverse sequence of the disassembly process.

• The fastening torque of the bolts is (12±1) Nm.

No. Description

1 Fixed sheet metal (total 3PCS)

Figure 2-32 Position of “L” Shape Fixing Plate

2.3.17. Removing of Fasteners of Infrared Humidier

The oating pole of the humidier high water-level switch is tightly bound together with a rubber string before

delivery, as shown in Figure 2-33. Remove the rubber string before the unit operation. Otherwise, the unit will

not be able to detect the high water-level alarm.

Do not touch the lamps with the bare hands.

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Installation

No. Description No. Description

1 Plug terminal 2 Connect HWA plug terminal to water level switch

Figure 2-33 High Water Level Detection Float Switch Lever and Terminal HWA

2.3.18. Removing Pipe Fasteners

To prevent the long copper pipes from scratching the metal plate and being damaged, the pipes are cushioned

with foam or bound before delivery. Remove those materials before power-on commissioning.

2.3.19. Installation Inspection

Table 2-12 Installation Inspection Checklist

Check Items Results

Leave enough space around the unit for maintenance

The equipment is installed vertically, and the installation fasteners have been xed

The pipes between the indoor and outdoor unit have been connected, and the ball valves of

the indoor and outdoor unit have been fully opened

Condensate pump is installed (if required)

The drain pipe has been connected

The water supply pipe for the Infrared humidier has been connected

All pipe joints are tightened

Fasteners for transportation have been removed

Irrelevant things (such as transportation material, structure material, and tools) inside or

around the equipment have been cleared after the equipment is installed

The airow distribution system has been installed in each room

(e.g. raised oor/grill, duct, etc.)

The upow unit must have plenum or air duct connection, and after installation the fan and

heater shall not be accessible

Everything is checked and veried, follow the electrical installation.

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2.4. Electrical Installation

In this section, the electrical installation of the PEX3 unit is explained in-depth to help to get familiar with the

various tasks such as the installation considerations, indoor wiring, power lines connection to the condenser,

and the checklist.

2.4.1. Installation Precautions

• The connection of all power cables, control cables, and ground cables should comply with the local and

national electrical regulations.

• The electrical installation and maintenance must be performed by authorized professional/installation

personnel.

• See the unit name-plate for the full load current. The cable sizes should meet the local wiring rules.

• Mains supply requirement: 400 V, 3 Ph +N~50 Hz.

• If the soft power cable uses Y-connection, and if the cable is damaged, it must be replaced by professional

service personnel.

• Before the wiring, use a volt-meter to measure the power supply voltage and ensure that the power supply

has been switched o.

• The applicable grid for this air conditioner, TN, TT star connection power system; consult Vertiv local

representative for other connections.

• A breaking device must be provided to disconnect the unit from power supply.

• The short circuit breaking current of the unit is 6 kA.

• Install suitable RCD according to actual installation.

2.4.2. Wiring of Indoor Unit

The locations of the low voltage devices are visible after opening the front door of the electrical control box of

the indoor unit, as shown in Figure 2-34 ( for air-cooled/ water-cooled model). The distribution information of

the detailed low voltage components are dierentiated according to the labels.

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Installation

No. Description No. Description

1 Terminal row 10 Terminal row

2 Electrical row 11 Electrical relay

3 Dierential pressure switch 12 Outdoor machine empty open (Only for Air-cooled)

4 Outdoor machine empty open (Only for Air-cooled) 13 Power connector

5 Transformer 14 Dierential pressure switch

6 Power connector 15 Airow loss switch

7 Airow loss switch 16 Contact device

8 Contact device 17 Bus/ air open

9 Bus/ air open

Figure 2-34 Electrical Control Box

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Installation

No. Description

1 Cable clamp

Figure 2-35 Cable Clamp Position

Figure 2-34 shows the details of power connectors in electrical control box, connects terminals L1 ~ L3, N, and

PE respectively to their counterparts of external power supply. Reserve some redundancy of the incoming cable

and x the cable to the cable clamp located on the inner side panel of the unit, refer Figure 2-35. The types of

wiring cables are of copper conductor, and the cross-section-area requirements of the copper wires can vary

with the dierent models. For the cable specication, refer the rated Full Load Ampere (FLA) in the

Table 2-13. Over-current/ Ground fault protection device is recommended to use the air switch with the feature

of D-release. Refer Table 2-14 for specic model selection.

An enlarged view of outdoor unit MCB (only for Air-cooled) and eld terminal array are shown in Figure 2-37.

L1~L3, N and PE are respectively connected with the corresponding end of the outdoor unit power line.

Figure 2-36 Enlarged View of Power Connector

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Figure 2-37 Enlarged View of Condenser MCB and Terminal

The cable sizes should meet the local wiring regulations.

Table 2-13 Rated Full Load Ampere (FLA)

Unit Type

Standard

Models

Electrical Heating No Electrical Heating

Cross-

Section-

Area of

Copper Wire

mm

2

Standard

Model with

2-stage

Electrical

Heating

1-stage

Electrical

Heating/

No

Humidier

2-stage

Electrical

Heating/

No

Humidier

With

Humidier

Without

Humidier

P1030 29.6 38.7 29.6 38.7 26.6 20.5 7

P1040 37.8 51.5 37.8 51.5 30.2 24.1 10

P1050 (S) 46.4 60.1 46.4 60.1 38.8 32.7 12

P1050 (D) 46.8 60.5 46.8 60.5 39.2 33.1 12

P2060 54.7 68.4 54.7 68.4 52.4 41.0 14

P2070 57.7 71.4 57.7 71.4 55.4 44.0 14

P2080 66.4 84.7 66.4 84.7 59.6 48.2 17

P2090 76.4 94.7 76.4 94.7 69.6 58.2 19

P2100 83.6 101.9 83.6 101.9 76.8 65.4 21

• The standard model is congured with compressor, EC fan, humidier and one-stage electrical heating.

• Air-cooled unit FLA excludes the outdoor unit current.

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Table 2-14 Rated Current of MCB

Type Rated Current of MCB (A)

P1030~P2100 125

2.4.3. Connecting Control Cables

The position of eld connection terminals is shown in Figure 2-36 and the enlarged view of the terminal row is

shown in Figure 2-38. The upper part of the terminal row is connected with the unit, and the lower part is the

interface of the user control signal line.

No. Description No. Description

1 37/38 short connection, remove this short wire at

remote shutdown

3 Access to public alarm

2 Rs485 interface 4 Custom alarm end for its common end

Figure 2-38 Enlarged View of Terminal Block/Row

Before connecting the control line, it is mandatory to perform the corresponding anti-static measures..

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2.4.4. Connecting Water-Under-Floor Sensor

Each unit is equipped with a water-under-oor sensor. Connect one end of the sensor to terminal 51# and the

other end to the common terminal 24#. The number of sensors in parallel connection is not limited, but each

unit has only one water-under-oor alarm.

2.4.5. Remote Shutdown Control Line Connection

As shown in Figure 2-38, 37# and 38# terminals can connect to remote shutdown switch, and they have been

shorted in the factory and the shorting cable should be removed if the terminals are to be connected to the

remote shutdown switch.

When 37# and 38# are opened, the unit will shut down.

2.4.6. Customized Alarm Terminal

Terminals 51# and 56# can be connected to two types of sensors, and terminal 24# is their common terminal

and can be dened as water-under-oor sensor. If there is an optional smoke detector, the alarm can be

involved in any between #56 and # 24 terminal. After the customer terminals are connected to external alarm

signals, the corresponding customized alarm should be set through the controller.

When the contact is open, and no external alarm is generated, the input state of the customer terminal is open.

But when the contact is closed, and the external alarm is generated, the input state of the customer terminal

will be shorted. At this point, the Precision Air Conditioner system will generate an audible alarm, and the

controller LCD will display the alarm information.

• LCD displays the corresponding alarm content

• Terminals 37# and 38#: Remote alarm

• Terminals 51# and 24#: Water-under-oor sensor by factory settings

2.4.7. External General Alarm

Terminals 75# and 76# can be connected to the external general alarms. The output signals to external alarm

devices, such as alarm indicator. When critical alarm occurs, the contact will be closed to trigger remote alarms,

send signals to the building management system or dial the paging system automatically. The power supply of

the external general alarm system is user prepared.

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2.4.8. Condenser Wiring

• Condenser Control Signal Terminal

70#/ 71# and 70A#/ 71A# are control signal input terminals for two circuits of condensers and their switching

status are identical with those of the compressor.

• Control Signal Line Connected to the Condenser

Open the sealed panel of the electric control box of the condenser to reveal the fan speed controller board,

according to the cable connection instructions in the “Liebert Condenser User Manual”. The signal cable

connection of condenser is as follows.

• Wiring Mode of PEX Condenser of Single System Unit Matches with Indoor Unit of Single System

The digital signal of dry contact J6 on the board (Refer Cable terminals section in “Vertiv PEX+ Condenser User

Manual” for the locations) is connected to the control terminals 70#/ 71# of the indoor unit.

• Wiring Mode of two PEX Condensers of Single System Unit Matches with Indoor unit of Dual System

The digital signals of dry contacts J6 on the condenser board corresponding to compressor 1# are connected

to the control terminals 70#/ 71# of the indoor unit, and the digital signals of dry contacts J6 on the condenser

board corresponding to compressor 2# are connected to the control terminals 70A#/ 71A# of the indoor unit.

• Wiring Mode of PEX Condenser of Dual System Unit Matches with Indoor unit of Dual System

Short-connected the terminals 70# & 70A# and 71# & 71A#. The digital signal of dry contact J6 on the board

can be connected to the control terminals 70#/ 71# or 70A#/ 71A#.

• Wiring Mode of LVC Condenser matches with two Indoor units of single system

Compressor single terminal row 70#/ 71# in 1# condenser electrical control box (refer “the LVC Condenser

Series User Manual” for external cables) can be introduced from either control interface of indoor unit.

Compressor single terminal row 70/ 70A#/ 71/ 71A# in 2# condenser (refer “the LVC Condenser Series User

Manual” for external cables) can be introduced from another 70#/ 71# control interface of indoor unit.

• Wiring Mode of LVC Condenser matches with Indoor unit of dual system

The power cables of condenser are connected with the MCBs (Figure 2-37) reserved in the indoor unit.

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Installation

2.4.9. Check the Installation

After completion of the electrical installation, should check conrmation as per Table 2-15.

Table 2-15 Inspection Checklist

Check items Results

The power supply voltage meets the rated voltage on the unit name plate

The system electric loop has no open circuit or short circuit

Power cables and ground cables to the MCBs, indoor unit and condenser

are well connected

The ratings of the MCBs and fuses are correct

The control cables are well connected

All the cables connections are fastened, with no loose screws

Do not power-on the unit, unless the unit has been checked and conrmed by Vertiv Personnel/ Vertiv

Service Team.

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Touchscreen Operation

Chapter 3: Touchscreen Operation

The Liebert iCOM oers the highest capability for unit control, communication, and monitoring of Liebert

Thermal Management Units. It is available as factory-installed on new units and assemblies.

3.1. Touchscreen Display and User Interface

The Liebert iCOM touchscreen, user interface speed set up, installation, and simplied control of Liebert PEX3

units literally putting cooling-system monitoring and management at your ngertips.

• User and service menus are password-protected to prevent unauthorized changes in the cooling unit

operation settings.

• The touchscreen is back-lit and auto-dims after a period of non-use, then turns o. Touch the screen to

re-illuminate the main screen.

• iCOM ships with default settings for eicient and eective operation of most cooling-units and it is easily

congured to meet any requirement.

• iCOM menus and displays are based on the options installed on the cooling units that it monitors and

manages.

Figure 3-1 iCOM Main Display

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Table 3-1 Main Display Controls and Options

No. Description

1 Alarms present: Displays the number of active alarms.

2

Menu icon: When unlocked, displays a menu for user or service option depending on which icon is

selected.

3

User icon: When selected the user options are available on the main display and menu

(Note: Unlock the display with the user Password to access the menu and options. See “Powering-On iCOM and

Logging-in/ Unlocking Controls”).

4

Service icon: When selected the service options are available on the main display and menu

(Note: Unlock the display with the user Password to access the menu and options. See “Powering-On iCOM and

Logging-in/ Unlocking Controls”).

5

Advanced icon: When selected the advanced options are available on the main display and menu

(NOTE: Unlock the display with the Service Password to access the menu and read-only options. See “Powering-

On iCOM and Logging-in/ Unlocking Controls”.

6

Cooling-unit parameters: Status display of selected system parameter settings. See Adding and

Adjusting Content.

7 Unit Identication: You can customize the unit name up to 6 characters/ numbers.

8 Search icon: Open the keyboard to search for controls and setting locations. See “Searching”.

9 Date/ Time.

10

• Lock/Unlock icon: Indicates whether or not the user and service is logged-in and options are

accessible

• Locked icon = display is read only

• Unlocked icon = User or service is logged-in and option is accessible

• See Powering-on iCOM and logging-in/ Unlocking Controls

11

Secondary-content panel: When accessing setting/conguration via the menus, the settings is

displayed in the right, ‘Secondary’ panel

12

Summary of current unit function. You can customize to show fan speed, cooling, percentages from

any installed device, and any physical (sensor) values.

13 Status Dial: Circular display of setpoints and environment conditions of the unit. See Touchscreen

14

Teamwork-mode icon: In a panel with status content the Teamwork Mode icon indicates the mode

selected

15 Control header: Control to access the user and service menus. See Control Header

16 Status Header. Displays the alarm status, unit identication, and the current date and time.

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3.2. Touchscreen Status Dial

The dial in the primary-control panel is divided into four customizable read-only sections that display setpoints

and environmental conditions for the unit status at a glance. See Figure 3-2, the center of the dial displays

sensor readings and changes color according to the alarm thresholds as the readings rise and fall. When the

cooling unit is powered-O, the center of the dial is grey. The readings display can be selected by touching the

center of the dial cycles through a set of sensor settings.

No. Description

1 • Control sensor and its setpoint: The sensors and setpoints displayed depend on the conguration of the unit. If

the sensor selected for temperature-control or humidity-control, the dial displays only temperature control or

humidity control setpoints respectively.

• If the sensor selected for fan control then the dial displays fan-control sensor and setpoint, as shown in Figure

3-2 above.

2 Single or multiple sensor readings. The setpoints can be scrolled by touching the displayed reading.

Figure 3-2 Dial Sections

3.2.1. Dial Background-Color Status Indication

The background color of the dial indicates whether or not the unit is powered-On or O and it also responds to

threshold settings of the control-sensor reading, see Figure 3-3 and Table 3-2 describes the background color

displayed if the selected sensor reading has threshold limits set.

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No. Description No. Description

1 Sensor reading is within threshold limits 3 Sensor reading is above threshold limit or the unit is in an alarm

condition

2 Unit is powered-o 4 Sensor reading is below threshold limits

Figure 3-3 Dial Background Colors

Table 3-2 Background Color Displayed by Selected Value and Threshold Limit

Sensor/Value Selected Threshold Limit Background Color

Return Temp

None Blue

High return temperature Red

Return Humidity

Low return humidity Blue

High return humidity Red

Dew Point

Low dew point Blue

High dew point Red

Supply Temp

Low supply temperature Blue

High supply temperature Red

Average Rack Temp

Low remote temperature Blue

High remote temperature Red

Max Rack Temp

Low remote temperature Blue

High remote temperature Red

Min Rack Temp

Low remote temperature Blue

High remote temperature Red

Static Pressure

Low static pressure Blue

High static pressure Red

Outdoor Temp None Green

Outdoor Humidity None Green

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3.3. Control Header

The control header contains the controls to access the user and service settings. The display is locked when

started initially and resumed after a period of inactivity.

3.3.1. Powering-On iCOM and Logging-in/ Unlocking Controls

iCOM is powered-ON when power is switched ON at the cooling unit’s disconnect switch and you activate

the display by touching it. iCOM is locked when started and also locks after a period of inactivity to prevent

unauthorized changes. A four digit password is required to access the user and service menus & options. The

advance menu is read-only at service level login.

• The factory-default inactivity period is a minute

• The factory-default password for user and service login are provided. We recommend changing the

passwords to prevent unauthorized changes.

• Default User Password = 1490

• Default Service Password = 5010

Steps to Unlock the Controls:

1. On the header, press . The keypad opens.

2. Press the numbers/ characters for your Password, then press .

Depending on the Password entered and your access level, the User and/ or Service options and view-only

access to the Advance menu are accessible. The details will be provided by accessing the User and Service

Menus.

3.3.2. Powering-on the Thermal Management Unit

Depending on the operating state, there are start/ stop priority switches that may prevent the cooling unit from

operating even though power to the unit is switched on and you have turned it on via iCOM. When all switches

are closed, then only the cooling unit operates. For example, even though you have turned-on the unit through

iCOM, if the BMS remote-monitoring system is sending a command to turn-o the unit, the cooling unit remains

O.

You must be logged-in to access the menu options See “Powering-On iCOM and Logging-in/ Unlocking

Controls”.

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To Power-On the Unit:

1. Press then > Turn Unit On, then Unit On dialog box opens.

2. Press Turn Unit On, then cooling unit starts, and the operating status is displayed as shown in Figure 3-4.

No. Description

1 Current status of the unit. See Cooling -unit status displayed as follow.

2 Teamwork icon. See Viewing Teamwork, Stand-by, Cascade Status.

Figure 3-4 Unit Status on iCOM Display

Table 3-3 Cooling Unit Status Displayed

Unit Status Text Description

ALARM OFF

An alarm forced the unit to turn o. See Viewing Unit Alarm.

MANUAL

Controlled by a service technician.

DISPLAY OFF

Unit is turned OFF at the iCOM display. See Powering-on the Thermal Management Unit.

ALARM STANDBY

In stand-by because of an active alarm on the unit see Viewing Unit Alarm.

STANDBY

In stand-by, because of service menu setting.

TIMER OFF

Scheduled on a timer and is in “sleep” mode waiting for the next start interval.

UNIT ON

Operating normally without alarm or warning.

WARNING ON

Active warning but still operating.

ALARM ON

Active alarm but still operating.

TIMER

Scheduled on a timer to operate and is in operating mode.

REMOTE OFF

• Turned-o by remote shutdown terminal.

• Occurs when a normally-closed set of 24 V contacts open.

• The remote On/ O and Display On/ O switches are in series, and the cooling unit will only turn-

on if both switches are “On/ Closed” or if one is “O/ Open”, the unit turns o.

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Unit Status Text Description

MONITORING OFF

• Turned-o by remote monitoring system.

• Check the remote monitoring device or call Vertiv technician support for assistance.

BACK-DRAFT

Unit is non-operational, but EC fan is operating as a back-draft damper.

RESTART DELAY

Not yet operational after a power cycle because the restart- delay time is active.

3.3.3. Powering-O the Thermal Management Unit

1. Press then > Turn Unit O, then Turn Unit O panel opens.

2. Press ‘Turn Unit O’, the unit begins a power-O countdown then powers-O.

You must be logged-in to access the menu options. See Powering-on iCOM and Logging-in/ Unlocking

Controls.

3.3.4. Logging Out

Log-out occurs automatically when the display back light turns-O for inactivity.

1. To log-out manually, press the lock icon. The icon indicates “locked”.

The factory-default inactivity period is 1minute.

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3.3.5. Setting the Date and Time

The correct date and time are critical for warnings, alarms, and scheduling.

1. Press then > Display Options >Display Properties > Date & Time.

2. Press the date eld, use the arrow to select the date and press Ok or press the time eld, use the arrow to

set the time, and press OK.

3. Select the date and time format if necessary.

4. Press Save.

The date selector has a preference switch in the upper-right corner. It helps in selecting between a

graphical or list view.

3.3.6. Searching

When logged-in, you can use the display search to nd the location of settings options based on a term, service

codes or parameter. You can also search by the line ID used in the iCOM before the touchscreen model.

1. In the control header, press the search eld. The keyboard opens.

2. Type the term and press . A list of locations that contain the searched term opens.

3. To go to a listed location, press an item, then press Go. The panel for the selected location opens.

4. Or to view the service codes and parameter entries related to the searched term, press View Parameter

Directory Entries (the number of related entries is included in the option). The Parameter Directory opens.

You may further rene the search in the directory.

You must be logged-in to access the display search. See Powering-on iCOM and Logging-in/ Unlocking

Controls.

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3.3.7. Using Context-Sensitive Help

Pressing the Help icon on the right-hand side of the display opens the Help drawer with information

about the panel or dialog currently on the display.

1. You can use search and the topic index to nd further information.

2. To close the Help drawer, press the close arrow .

3.3.8. About iCOM Version

The version, build, and other rmware information for the iCOM display board may be helpful while servicing or

troubleshooting.

1. Press then >About. The ABOUT panel opens.

3.3.9. Accessing the User and Service Functions

iCOM operating functions that monitor and control a cooling unit are accessed via the User and Service menus.

1. To access a menu, press the icon for the menu you want, , or . In the control header, see

Control Header: The orange bar appears below the menu name when selected indicating the menu content

that will be displayed.

2. Press the menu icon . The menu opens.

You must be logged-in to access the menu options. See Powering-on iCOM and Logging-in/ Unlocking

Controls.

3.3.10. User Menu

The user menu lets you view system and unit status and edit some setpoints.

User menu options

1. Setpoints: Opens the SETPOINTS panel. See Viewing and Editing setpoints for the cooling unit.

2. Active Alarms: Opens the ALARMS panel. See Viewing Unit Alarms.

3. Event Log: Opens the EVENT LOG panel. See Viewing the Event Log.

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4. Sensor Data: Opens the SENSOR DATA panel. See Viewing Sensor Data.

5. Display Options: Opens the Display Options menu:

• Customize Labels

• Display Properties

• Date & Time

6. Total Run Hours: Opens the RUN HOURS panel. See Managing Run Hours for a Component.

7. About: Opens the ABOUT panel. See About iCOM Version details

8. Turn Unit On/O: Depending on unit’s status, open the TURN UNIT ON or TURN UNIT OFF dialog. See

Powering-on the Thermal Management Unit or Powering-o the Thermal Management Unit

3.3.11. Service Menu

The service menu lets you view and edit setpoints and perform many other functions.

Service Menu Options

1. Setpoints: Opens the SETPOINTS panel.

2. Diagnostic/Service: Opens the Diagnostic/Service menu:

• Diagnostics

• Technical Support-contact information for the cooling unit and iCOM display

3. Alarm/Event Setup: Opens the ALARMS & EVENTS panel.

4. Economizer: Opens the panel for the economizer installed on the cooling unit.

5. BMS & Teamwork Setup: Opens the BMS & Teamwork Setup menu:

• U2U Setup

• Teamwork/Standby

• BMS Setup

6. Scheduler: Opens the SCHEDULER panel.

7. Options Setup: Opens the OPTIONS SETUP panel.

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8. Auxiliary Device Setup: Opens the Auxiliary Device Setup menu:

• Sensors

• Analog Input

• Modbus Devices

• iCOM-DO

• CapCom

9. Backup & Security: Opens the Backup & Security menu:

• Control Upgrade

• Control Backup/ Replicate

• Control Files

• Display Upgrade

• Display Backup/ Replicate

10. Turn Unit On/ O: Depending on unit’s status, open the TURN UNIT ON or TURN UNIT OFF dialog. See

Powering-on the Thermal Management Unit or Powering-o the Thermal Management Unit.

3.3.12. Advanced Menu

The advanced menu provides a read-only view of the advanced set-up and factory-level settings.

1. Advanced Menu Options:

2. Factory Settings: Unit-code and conguration settings.

3. Diagnostic: Details about control and cooling operation.

4. Expert Settings: Parameters and settings for use by trained professionals only.

5. Compressor Info: Details about compressor state and operating mode.

6. Tandem Info: Details about compressor state and operating mode.

7. MBV Settings: Motorized ball valve settings (water-cooled heat rejection).

8. Running Monitoring: Details about component run times.

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9. Modbus Devices: Information about connected Modbus devices such as power and ow meters.

10. Control Override: Allows simulating events and override of analog outputs beyond normal limits.

11. EEV Settings: Electronic Expansion Valve settings.

12. MC Condenser: Details about MC condenser (air-cooled heat rejection).

13. Parameter Directory: A searchable list of all parameters in the user interface.

3.4. User Operation

Viewing and Editing setpoints for the cooling unit.

• User-level access allows viewing and editing of only a limited number of setpoints. To view or adjust all

setpoints, you must have service-level access.

• Depending on the type of thermal management unit, included components and control settings of your

system, the options on your iCOM display may dier.

3.4.1. Editing Humidity Setpoints

1. Press then > Setpoints > Humidity Control. The Humidity Control secondary panel opens.

2. Adjust the setpoint options, then press Save. The setpoint will be updated.

3. Press Cancel to discard the changes.

3.4.2. Editing Temperature Setpoints

1. Press then > Setpoints > Temperature Control. The Temperature Control secondary panel

opens.

2. Adjust the setpoint options, then press Save. The setpoint will be updated.

3. Press Cancel to discard the changes.

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3.4.3. Viewing Unit Alarms

The ALARMS panel lists active alarm and warning events. Table 3-4 below describes the type and state of the

alarm shown by indicator dots.

Table 3-4 Alarm Status/ Indicator

Indicator Description

Yellow dot Warning event

Red dot Alarm event

Circle

Event condition has cleared, but still must be

acknowledge. See the Acknowledge Alarm

To view alarms

1. Press then >Alarms. The ALARMS panel opens.

2. Press an alarm to display the ALARM DETAILS panel.

3.4.4. Silencing an Audible Alarm

Touch the screen to silence an audible alarm. If the alarm is non-latching, the alarm silences when the condition

clears.

The audible alarm must be enabled in display options to make sound.

3.4.5. Acknowledging Alarms

Depending on the notication settings, alarms and warnings must be acknowledged or reset. An event is active

as long as it is unacknowledged, with the exception of the network-failure events described in Table 3-5. Once

acknowledged, an event remains active until the situation that triggered the event is resolved, see Table 3-4 for

event-status indicators. When the event is acknowledged and cleared, it is removed from the Alarms panel and

the LED stops ashing red.

Acknowledging alarm events does not clear them, to clear an issue, it must be corrected, reset automatically

by the controller or reset manually.

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To acknowledge alarms

1. On the ALARMS panel, press Acknowledge All: A check mark overlays the status indicator of the active

alarms and warnings, and these automatically clears when the condition is no longer present.

2. If a critical event must be reset manually, then the acknowledged items are listed with a Reset All button on

the ALARMS panel.

3. Touch Reset All to manually reset the condition.

Table 3-5 Events that Clear without Acknowledgment

Network Failure Description

Unit xx

disconnected

• The iCOM I/O board assigned as U2U address number XX (two up to thirty- two) has lost

communication with the group

• Make sure all units are powered-on at the disconnect

• Check cable connections and network setting wherever applicable

No connection

W/unit 1

• The iCOM I/O board assigned as U2U address number 1 has lost communication with the

group

• Make sure all units are powered-on at the disconnect

• Check cable connections and network setting wherever applicable

BMS disconnect

• The BMS/ BAS has not completed a handshake within the time dened by the BMS/ BAS

• Verify monitoring connection and communication to the BMS/ BAS panel

Unit code missing The Factory unit code must be conrmed, saved and executed

Unit code mismatch The Factory unit code must be conrmed, saved and executed

Ambient sensor

failure

The outdoor temperature/ humidity sensor used on the air economizer unit has become

disconnected or is no longer working properly

3.4.6. Viewing the Event Log

The event log is a list by date/ time of the last 400 events generated by iCOM for the thermal-management

unit. On the User menu, press Event Log. The EVENT LOG for the cooling unit opens. Table 3-6 describes the

color-coded status for each event.

Depending on the type of thermal management unit, included components and control settings of your

system, the options on your iCOM display may dier.

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Table 3-6 Events that Clear without Acknowledgment

Indicator Description

Green Dot Message

Yellow Dot Unacknowledged warning event. See acknowledge alarm on the previous page

Red Dot Unacknowledged alarm event. See acknowledge alarm on the previous page

White Dot with check-mark overlay Acknowledged event, the cause still exists

White circle Acknowledged event, the cause is cleared

3.4.7. Viewing Sensor Data

The Sensor Data panel lists the standard and optional sensors monitored by iCOM and the current readings of

each sensor.

1. Press then > Sensor Data. The Sensor Data panel opens.

2. A secondary panel displays the DAILY SENSOR READING SUMMARY, which shows temperature, humidity

and dew-point readings for the cooling unit.

3.4.8. Managing Run Hours for a Component

You can view the run hours for components on a cooling unit, set the total-run-time limit, and reset total run

hours to zero.

1. Press then > Total Run Hours. The RUN HOURS panel opens and the current hours for each

component are listed in the Total Run Hours column (to reset the total run hours to zero, refer Section 3.4.9

Setting run hours to zero).

2. Use the slider to set the total-run-time limit for each component, then press Save to set the limits.

3.4.9. Setting Run Hours to Zero

1. On the RUN HOURS panel, press to check each box in the Total Run Hours column next to the component

(s) to reset. The Set to Zero button is enabled.

2. Press Set to Zero, the total run hours for selected component (s) will set to zero.

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3.4.10. Viewing Teamwork, Stand-by, Cascade and Operating Status

In the main User panel, the Teamwork Mode icon indicates the mode selected, see Figure 3-5.

To view the teamwork details

1. Press the Teamwork-mode icon.

2. The teamwork dialog opens display the teamwork mode, number of units in stand-by, and number of

operating units.

No. Description

1 No teamwork

2 Mode 1- Parallel Teamwork

3 Mode 2- Independent Teamwork

4 Mode 3- Optimized Aisle Teamwork

Figure 3-5 Teamwork icons

You must be logged-in with the Service Password to edit teamwork mode. Refer Powering-on iCOM and

Logging-in/ Unlocking Controls.

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iCOM Controller Operation

Chapter 4: iCOM Controller Operation

This chapter explains the LCD, Button, Indicator Panel, Structure Chart of Control Menu, Start-Up Interface,

Main Interface, User Menus, Service Menus, Advanced Menus and Event Name and Denition of the iCOM

Controller. The iCOM controller adopts menu operation. The display board monitors, displays, and the user may

operate the parameters on the display board to control the environment within a set range.

4.1. LCD Screen

LCD Screen is located on the front panel of the Liebert PEX3 series. The LCD displays the current state of

the equipment room such as temperature, humidity and so on. You can also read and modify the equipment

conguration through the LCD. The LCD uses white back-light, if no button is pressed within a certain period of

time (settable; default: 5min), the back-light turns o until any one button of the panel is pressed.

4.2. Button and Indicator Panel

Nine buttons and two indicators are located on the button & indicator panel as shown in Figure 4-1, Including:

• Indicators: alarm indicator and operation indicator

Buttons: ON/ OFF button, Enter button, ESC button, Up button, Down button, Left button, Right button, Alarm

silence button, and Help button.

No. Description No. Description

1 Alarm silence button 7 Down button

2 Alarm indicator 8 Right button

3 ON/OFF button 9 Enter button

4 Operation indicator 10 Up button

5 ESC button 11 Left button

6 Help button

Figure 4-1 Button and Indicator Panel

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The indicators are described in Figure 4-2. The functions of the buttons are described in Table 4-2.

Table 4-1 Indicator Description

Indicator Description

Alarm indicator The alarm indicator turns on red upon alarms triggered. It is o after the alarm has been cleared

Operation indicator

The operation indicator turns on green when the unit is operating. When the unit is shut down,

the indicator is yellow

• After the system is powered on, the system will resume the operation state before power-o. For example,

if the system is in the work state when its powered o, it goes to the work state automatically after

power-on. You do not need to start it manually.

• When the system is in the test state, the setpoints will not be written into the iCOM controller.

Table 4-2 Button Description

Button Function Description

ON/OFF

button

• Switch on/ o the system. Press the ON/ OFF button to shut down the unit, or to start an idle system.

• Test the display state of the back-light of the LCD and the operation indicator.

• After powering-on, when the system is stand-by (dened as test state in this manual), press the ON/

OFF button to turn on the unit, the indicator turns to green, and the LCD

back-light turns on. This is for testing whether the LCD back-light and the operation indicator are

normal.

Enter

button

• Enter the selected menu or save the setting after parameters are changed. Select the menu or

parameter by pressing the direction button, the menu and the parameter is high-lighted.

• Test the display of characters.

• When the system is in the test state, press the Enter button that will display the ASCII code. This

function is used to test whether the characters are displayed normally on the LCD.

ESC

button

• Quit the current menu.

• Abolish the current change of parameters.

• Test the LCD high light.

• Press the ESC button to switch the LCD between light and high light when the system is in the test

state. This function can test whether the LCD high light is normal.

Up button

• Increase the value of the displayed parameters during parameter setting.

• Scroll a row or a screen up in the query state.

• Test the buzzer.

• Press the Up button when the system is in the test state to increase the buzzing frequency (initial

value: 0%). Meanwhile the buzzer will sound at the set frequency This function is used to test whether

the buzzer is normal.

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Button Function Description

Down

button

• Decrease the value of the displayed parameters during parameter setting.

• Scroll a row or a screen down in the query state.

• Test the buzzer.

• If the buzzer frequency is not 0%, press the down button to decrease the buzzing frequency when the

system is in the test state. Meanwhile the buzzer will sound at the set frequency. This function is used

to test whether the buzzer is normal.

Left

button

• Select the left bit during the parameter setting operation.

• Test the LCD contrast.

• Press the Left button when the system is in the test state to decrease the LCD contrast (by default:

100%) This function is used to test whether the LCD contrast is normal.

Right

button

• Select the right bit during the parameter setting operation.

• Test the LCD contrast.

• If the LCD contrast is not 100%, press the right button when the system is in the test state to increase

the LCD contrast. This function is used to test whether the LCD contrast is normal.

Alarm

silence

button

• The system will issue an alarm sound upon alarms. If you press the Alarm Silence button, the alarm

sound will be eliminated.

• Clear the current alarm after the alarm sound is silenced.

• Test the alarm indicator and rest the LCD contrast and buzzer frequency.

• Press the alarm silence button when the system is in the test state to switch the alarm indicator

between on and o. It can test whether the alarm indicator is normal. Meanwhile, reset the LCD

contrast to 100% and buzzer frequency to 0%.

Help

button

• Display the online help.

• Test the yellow display of the LCD operation indicator.

• When the system is in the test state, press the Help button to switch on and o the LCD operation

indicator. This function is used to test whether the yellow display of the LCD operation indicator is

normal.

4.3. Structure Chart of Control Menu

Please refer to Appendix-III Menu Structure of iCOM Controller.

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4.4. Start-Up Interface

After the system is powered on, it is in the waiting state. The LCD will display the interface shown in Figure 4-2.

Figure 4-2 Startup Interface

4.5. Main Interface

After power-on, the LCD will enter the main interface after about 60s. The main interface provides the general

information about relative equipment status, including current temperature and humidity; temperature and

humidity setpoints; equipment output status (fan, compressor, cooling, heating, dehumidifying, humidifying);

alarm and maintenance status.

The main interface has two display modes: Graphical and Simple. The dierence between these two display

modes is that the graphical interface (see Figure 4-3) displays the percentage output chart of the function

components, while the simple interface (see Figure 4-4) displays only the icons of current operation mode only.

The switching of two modes can be realized by operating the menu. For details, refer to DISPLAY SETUP.

The upper left corner of the main interface displays the current unit number; the upper right corner displays

the current system status If there is no button operation for 255s on other menu display screen, the LCD screen

returns to the main interface.

No. Description No. Description

1 Setpoint 2 Present value

Figure 4-3 Graphical Mode of Main Interface

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No. Description No. Description

1 Setpoint 2 Present value

Figure 4-4 Simple Mode of Main Interface

The icons of the graphical and simple modes on the main interface are dened in Table 4-3.

Table 4-3 Denition of Icons

Icon Denition Icon Denition

Fan running Free cooling

Cooling Maintenance

Hot water heating Dehumidifying

Electrical heating Humidifying

4.6. User Menus

Press the enter or down button on the main interface to enter the User Menus, as shown in Figure 4-5. The

User Menus are displayed in six pages, each displaying one or two submenus. Press the Enter button to

highlight the submenu, the Up or Down button to browse the submenus, and the Enter button to enter the

selected one.

Figure 4-5 User Menus

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4.7. Password

The password is necessary for dierent level menus. After entering the password (user password: 149), use the

up and down navigation buttons to browse/ change all the options/parameters in User Menu, and then press

the enter button to enter the selected option.

4.8. Setpoints

The setpoints disappear when the power is lost. Use the User Menus to browse and set parameters in the

SETPOINTS submenu. The left row displays the parameter codes; the middle row; the parameter name; the

right row and the setpoints, as shown in Table 4-4.

Table 4-4 Descriptions of Setpoint Parameters

Parameters Default Setting range Description

U102 TEMP SET 23.0 °C 5.0 °C to 40.0 °C Air Temperature Setpoint

U102 TEMP ACT -

5.0 °C to 40.0 °C

Actual Air Temperature Setpoint

U103 TEMPSENS Return Sensor

0 = SUP

1 = REM

2 = RET

Temperature Control Sensor

U104 HUM SET

50% 20% to 80% Humidity Setpoint

12.0 °C 5.0 °C to 30.0 °C Dew Point Setpoint

U105 SUP SENS No No, Lim, Ctrl, Cool Supply Air Type

U106 HUM CTRL Predictive

0 = Rel

1 = Comp

2 = Pred

3 = DewP

Humidity Control Type

U107 FAN SET 23.0 °C

5.0 °C to 40.0 °C Fan Speed Temperature Setpoint

U108 FAN SENS Return Sensor

0 = SUP

1 = REM

2 = RET

3 = MAN

Fan Control Sensor

U110 SMART AI -

0 = No

1 = Yes

Smart Aisle Enabled

U113 2ND SETP 23.0 °C 5.0 °C to 40.0 °C 2nd Temperature Setpoint

U114 SUP TEMP 5.0 °C

5.0 °C to 27.0 °C

Supply Temp Limit Setpoint

U116 BACK TSP 23.0 °C

5.0 °C to 40.0 °C

BMS Backup Temp Setpoint

U117 BACK FAN 23.0 °C

5.0 °C to 40.0 °C

BMS Backup Fan Setpoint

U119 RCOMP SP

23.0 °C

5.0 °C to 40.0 °C

Return Compensation Setpoint

If you want to modify the preceding setpoints, enter the password before entering the SETPOINTS menu. Then

press the Enter button to enter the submenu and use the Up and Down button to scroll the options. Press the

Enter button to select one parameter, use the Up or Down button to set the value, and press the Enter button

to save the change.

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4.9. Event Log

You can enter the EVENT LOG menu without a password, as shown in the Figure 4-6.

Figure 4-6 Event Log Menu

The EVENT LOG menu saves the last 400 system records. The event types include message, warning and

alarm

• When the event type shows ‘Message’, the LCD will display the event name only.

• When the event type shows ‘Warning’, the LCD will display the event name and the alarm indicator turns red.

• When the event type shows ‘Alarm’, the LCD will display the event name, the alarm indicator will turn red, and

an audible alarm will be raised.

4.10. Graphics

The GRAPHICS menu provides two types of graphs: RETURN TEMP and RETURN HUMIDITY. These graphs

reect the temperature and humidity changes over a period of time in the past.

In the graphs, the current temperature or humidity is the origin, the time is the horizontal axis, and the

temperature or humidity is the vertical axis, as shown in the Figure 4-7.

Figure 4-7 The Graph of Return Temperature and Return Humidity

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As the horizontal axis, the time range can be set into eight types. Each pixel indicates dierent time in dierent

time ranges. See Table 4-5 for the detailed time range. The scaling of the vertical axis can also be set for the

RETURN TEMP, the scaling range is ± 3 to ± 20: For the RETURN HUMIDITY, the scaling range is

± 10 to ± 30. The greater the scaling range, the greater the value each pixel and the more centered the curves.

Parameters can be set without entering the password. Press the enter button to highlight the parameters, use

the up or down button to select a parameter. Then press the enter button again to enter the parameter and use

the up or down button to set the value. Press the enter button to nally save the change.

Table 4-5 Time Range

Time Range Time Indicated by each Pixel Time Range Time Indicated by each Pixel

8min 6s 2d 36min

32min 24s 4d 72min

1hr 45s 8d 144min

12hr 9min 16d 288min

24hr 18min

4.11. Set Alarms

The SET ALARMS menu is used to set the upper and lower limits of temperature and humidity alarms. The

settings will not be lost when the power fails. You can select the ‘SET ALARMS’ submenu to browse and set the

parameters through the USER MENUS. The parameters are described in Table 4-6.

It is recommended not to change the system defaults. If you consider it necessary to change the defaults,

consult Vertiv personnel.

Table 4-6 Descriptions of SET ALARMS Parameters

Parameters Default Setting Range Description

U202 RTN SNSR Yes Yes, No Return air sensor alarm enable

U203 HI TEMP 37.8 °C 1.0 °C to 99.0 °C High return air temperature threshold

U204 LO TEMP 18.3 °C 1.0 °C to 99.0 °C Low return air temperature threshold

U205 HI HUM 65% 1% to 99% High return air humidity threshold

U206 LO HUM 35% 1% to 99% Low return air humidity threshold

U207 SENSOR A No Yes, No Sensor alarm enable

U208 HI TEMPA 32.3 °C 1.0 °C to 99.0 °C High temperature threshold of sensor A

U209 LO TEMPA 12.8 °C 1.0 °C to 99.0 °C Low temperature threshold of sensor A

U210 HI HUM A 70% 1% to 99% High humidity threshold of sensor A

U211 LO HUM A 30% 1% to 99% Low humidity threshold of sensor A

U213 SUP SNSR Yes Yes, No Supply air alarm enable

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Parameters Default Setting Range Description

U214 HI SUP T 23.9 °C 1.0 °C to 99.0 °C High supply air temperature threshold

U215 LO SUP T 10.0 °C 1.0 °C to 99.0 °C Low supply air temperature threshold

U219 REM SNSR Disabled

0 = No

1 = Com

2 = Sep

Remote Sensor Alarms

U220 HI REM 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature

U220 LO REM 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature

U224 HIREM 01 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 01

U224 LOREM 01 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 01

U225 HIREM 02 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 02

U225 LOREM 02 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 02

U226 HIREM 03 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 03

U226 LOREM 03 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 03

U227 HIREM 04 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 04

U227 LOREM 04 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 04

U228 HIREM 05 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 05

U228 LOREM 05 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 05

U229 HIREM 06 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 06

U229 LOREM 06 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 06

U230 HIREM 07 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 07

U230 LOREM 07 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 07

U231 HIREM 08 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 08

U231 LOREM 08 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 08

U232 HIREM 09 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 09

U232 LOREM 09 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 09

U233 HIREM 10 32.3 °C 1.0 °C to 99.0 °C High Remote Temperature 10

U233 LOREM 10 12.8 °C 1.0 °C to 99.0 °C Low Remote Temperature 10

To browse through the menu, press the enter button to highlight the option, and use the up or down button

to scroll. Password is required for changing the setpoints. Then, enter the SET ALARMS menu, press the enter

button to highlight the option, use the up or down button to browse the submenu. Press the enter button to

enter the selected parameter. Use the up or down button to change the setpoints, and press the enter button

to save the change, or press the ESC button to quit the change.

4.12. Display Setup

The DISPLAY SETUP menu is used to set the LCD display attributes. Password is not required for changing the

setpoints. The parameters are described in the Table 4-7.

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Table 4-7 Descriptions of DISPLAY SETUP Parameters

Parameters Default Setting range Description

U401 LANGUAGE EN

RUS, CZE, CHI,

ESP, FRE, ITA,

DEU, EN, POR

Language options

U402 YEAR 2005 - Current year

U402 MONTH 04 01 to 12 Current month

U402 DAY 19 01 to 31 Current day

U403 HOUR 19h - Current hour

U403 MINUTE 8min - Current minute

U403 SECOND 17s - Current second

U404 TEMP F/C °C °F, °C Temperature indication

U405 CONTRAST 50% From 0% to 100% Display contract

U406 BUZ FREQ 50% From 0% to 100% Buzzer frequency. 0% means buzzer silenced

U406 BUZ TEST O On, O

Buzzer frequency test switch. It determines whether or not

there will be sound accompanying the adjustment of BUZ

FREQ through the setting

U407 BACKLITE 5min

5min, 10min,

30min, 1hr, 12hr

Backlight time, or the backlight time when there is no

button operation

U408 SCREEN Graph

Graph, Simple,

SimCo, GraCo

Main interface display mode

U409 SHOWS A + S SET, ACT, A + S

Main interface display mode of setpoints and actual values

Range:

SET: only setpoints of the temperature and humidity are

displayed.

ACT: only actual temperature and humidity are displayed.

A + S: both setpoints and actual values of the temperature

and humidity are displayed.

U410 DISPLAY Norm

Norm (normal),

Inv

Display color

U411 DATE m/d/y m/d/y, dmy, ymd Date display format

4.13. Total Run Hrs

The TOTAL RUN HRS menu records the total run time (unit: hr) of the system components. You can also set

the run time limits of the system components through this menu. If the actual component run time exceeds the

set limit, alarms is triggered.

This menu requires password. You can reset the total run time to zero to restart timing. The parameters on

this menu are described in the Table 4-8. Each component has a LIMIT option to set the run time limit of the

corresponding component.

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Table 4-8 Descriptions of TOTAL RUN HRS Parameters

Parameters Default Related component Parameters Default Related component

U502

MOTOR

(S)

1000hr

Fan motor

U507 HG/HW 23hr Hot gas/ Hot water

U502 LIMIT 32000hr U508 EL HEAT1 -

Electric reheat 1

U503 COMP1 500hr

Compressor 1

U508 LIMIT 0hr

U503 LIMIT 32000hr U509 EL HEAT2 -

Electric reheat 2

U504 COMP2 500hr

Compressor 2

U509 LIMIT 0hr

U504 LIMIT 32000hr U510 EL HEAT3 -

Electric reheat 3

U505 CW -

Chilled Water

U510 LIMIT 0hr

U505 - - U511 HUM -

Humidier

U506 LIMIT 3200hr

Free Cooling

U511 LIMIT 0hr

U506 FC 23hr U512 DEHUM -

Dehumidier

U507

LIMIT 3200hr

Hot gas/ Hot water U512

LIMIT 0hr

Timers resetting is not needed unless the components are replaced.

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4.14. Sleep Mode

In the sleep mode, the air conditioner unit can realize auto-On/ O. Through the SLEEP MODE menu, you can

set two-time zones of the sleep mode, and select the sleep timing mode. The parameters on this menu are

described in Table 4-9.

Table 4-9 Descriptions of SLEEP MODE Parameters

Parameters Default Setting Range Description

U602 SLEEP EN No

Yes, No

Sleep mode day, including Monday ~ Sunday. Set the value of any

day to ‘Yes’, and the system will enter sleep mode on that day every

week. This parameter works together with the following hour and

minute settings to designate an exact time

U604 MON No

U604 TUE No

U604 WED No

U604 THU No

U604 FRI No

U604 SAT No

U604 SUN No

U606 START 1 0hr

-

Sleep mode start time 1. The rst parameter is used to set the hour

of time, and the second one is used to set the minute of time

U606 START 1 0m

U606 STOP 1 0hr

Sleep mode end time 1. The rst parameter is used to set the hour of

time, and the second one is used to set the minute of time

U606 STOP 1 0min

U608 START 2 0hr

Sleep mode start time 2. The rst parameter is used to set the hour

of time, and the second one is used to set the minute of time

U608 START 2 0min

U608 STOP 2 0hr

Sleep mode end time 2. The rst parameter is used to set the hour of

time, and the second one is used to set the minute of time

U608 STOP 2 0min

U609 TIME MOD Yes Auto, Yes, No

Timing mode setting range. Auto: during the system sleep time, if

high/low temperature occurs, the system will resume operation and

mask the alarm for 15min The system will re-enter the sleep mode

after the alarm is cleared.

Yes: start sleep mode; No: no sleep mode

U610 TIME TYP S.OFF S.OFF, DEADB Timing mode selection

U611 DEADBAND 2.3 K 2 K to 15 K Used to set the deadband temperature setting range

4.15. Service Info

The SERVICE INFO menu provides the contact information of customer service personnel. This information is

read only.

4.16. Active Alarms

The ACTIVE ALARMS menu displays the active alarms of the system. No password is required to access this

menu.

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Application of INTELLI SLOT

Chapter 5: Application of INTELLI SLOT

This chapter introduces the application of the host communication components INTELLI SLOT, including

installation and commissioning of the host communication card.

5.1. Introduction of Host Communication Card

Liebert PEX3 supports IS-UNITY-DP card, shown in the Figure 5-1.

No. Description No. Description

1 RJ-45-Ethernet:- HTTP; Modbus TCP; BACnet IP;

SNMPv1,v2e,v3; Vertiv protocol

4 Micro- USB AB (Future release)

2 Liebert sensor network (Future release) 5 BACnet; MSTP; Modbus RTU YDN23

3 Reset button (Reboot or reset to factory defaults)

Figure 5-1 IS-UNITY-DP Card

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Application of INTELLI SLOT

5.2. Commissioning Host Communication Component

Before commissioning you must access the SERVICE Menus’ of the iCOM control board to set S824 MON

ADD as ‘3’ S835 MON PORT as Vertiv and S843 BL CTRL as S+R in the “Network Setup.”

5.2.1. Assigning the Card’s IP Address

DHCP

Liebert IntelliSlot Unity card is factory-congured for DHCP. If you require a Static or Boot network

conguration, ensure to change the Boot Mode as described in Static IP. Connect a RJ-45 cable to the card and

it will receive an IP address from the DHCP server. Contact the DHCP administrator to obtain the IP address

using Liebert IntelliSlot Unity card’s MAC address. The MAC address is printed on the card faceplate.

If the DHCP administrator is not available or there is no way of determining the IP address assigned by the

DHCP server, use a computer with a direct Ethernet connection to Liebert IntelliSlot Unity card, and follow

the instructions to auto conguration IPv4 Address, conventions are described in Section 5.2.2- Connect an

Ethernet Cable - Connect an Ethernet Cable to access the card’s Web page and congure the card. To see

the card’s last DHCP- assigned IP address, click on the Unity Tab, then on the left side menu select Support >

Active Networking. The table of information shows the last IP address assigned by the DHCP server. The card

may retain that IP address when it reconnects to the DHCP network because most DHCP systems reuse the

same IP address for the same device.

Figure 5-2 IS-UNITY-DP Card Connection Port

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Application of INTELLI SLOT

No. Description No. Description

1 Communication tab 3 IP address

2 Support > Active networking

Figure 5-3 Example of IS-UNITY-DP Card Web Page

Static IP

To assign a static IP address, use the Ethernet connection to congure the card. Proceed to Section 5.2.2.

Connect an Ethernet Cable.

5.2.2. Connect an Ethernet Cable

1. Connect the computer running on Microsoft Windows operating system (Microsoft Windows® XP with

SP2 [64-bit] or SP3 [32-bit] or later) to the card by plugging a network cable into the RJ-45 port on the

computer and Liebert IntelliSlot Unity card.

2. Auto-conguration, which is normally enabled on the computer running with Microsoft Windows operating

system will automatically negotiate the communication settings. This takes about one minute.

3. If the Ethernet adapter is used to attach the card and it does not show an auto-conguration IPv4 address,

then open a new Command Prompt and type ipcong/ renew and press ‘Enter’. This forces the computer to

acquire the auto-conguration IPv4 address.

4. When the computer has the auto-conguration IPv4 address, then open a browser window on the computer

and type 169.254.24.7 (the card’s default ‘Auto-conguration IPv4 Address’) in the URL address eld. The

card’s Web page appears.