Liebert PEX+ Series User manual

Liebert. PEX+ Series Precision Air Conditioner
User Manual
Version V1.0
Emerson Network Power provides customers with technical support. Users may contact the nearest
Emerson local sales office or service center.
Copyright 2013 by Emerson Network Power Co., Ltd.
All rights reserved. The contents in this document are subject to change without notice.
Emerson Network Power Co., Ltd.
Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China
Homepage: www.emersonnetworkpower.com.cn
Customer service hotline: [phone]
E-mail: [e-mail]

Contents
Chapter 1 Overview ............................................................................................................................................................ 1
1.1 Model Description ................................................................................................................................................. 1
1.2 Appearance .......................................................................................................................................................... 1
1.3 Main Components and Optional Features ............................................................................................................ 2
1.3.1 Components of Indoor Unit ........................................................................................................................ 2
1.3.2 Condenser ................................................................................................................................................. 3
1.3.3 Remote Monitoring Software ..................................................................................................................... 3
1.3.4 Optional Features ...................................................................................................................................... 3
1.4 Transportation And Movement .............................................................................................................................. 3
1.5 Storage Environment ............................................................................................................................................ 4
Chapter 2 Instructions for Installation Preparations ............................................................................................................. 5
2.1 Equipment Room Requirement ............................................................................................................................. 5
2.2 Installation Space .................................................................................................................................................. 5
2.2.1 Installation Space Requirements ............................................................................................................... 5
2.2.2 Maintenance Space requirement ............................................................................................................... 5
2.3 Operating Environment ......................................................................................................................................... 6
2.4 Unpacking And Inspection .................................................................................................................................... 6
2.4.1 Unpacking .................................................................................................................................................. 6
2.4.2 Inspection .................................................................................................................................................. 7
Chapter 3 Mechanical Installation ....................................................................................................................................... 8
3.1 Installation Notes .................................................................................................................................................. 8
3.2 System Installation Arrangement .......................................................................................................................... 8
3.2.1 Overall System Arrangement ..................................................................................................................... 8
3.2.2 System Installation Illustration ................................................................................................................... 9
3.3 Mechanical Parameters ........................................................................................................................................ 9
3.3.1 Dimensions and weight of indoor unit ........................................................................................................ 9
3.3.2 Dimensions and weight of condenser ...................................................................................................... 10
3.3.3 Plenum dimensions (for upflow unit) ........................................................................................................ 10
3.3.4 Positions and dimensions of air outlet ..................................................................................................... 11
3.4 Installing Indoor Unit ........................................................................................................................................... 13
3.4.1 Making base ............................................................................................................................................ 13
3.4.2 Installing base .......................................................................................................................................... 13
3.4.3 Vibration absorbing .................................................................................................................................. 13
3.4.4 Install Indoor Unit Cabinet ....................................................................................................................... 14
3.5 Installing Condenser ........................................................................................................................................... 14
3.6 Piping For Air-Cooled Unit .................................................................................................................................. 14
3.6.1 Pipe Extension Kit (Optional) ................................................................................................................... 14
3.6.2 Connecting condensate drain pipe of indoor unit ..................................................................................... 14
3.6.3 Connecting water inlet pipe of humidifier ................................................................................................. 15
3.6.4 Connecting copper pipes (discharge pipe and liquid pipe) between indoor unit and condenser.............. 15
3.6.5 Installing pipe extension kit (optional, for site installation) ....................................................................... 17

3.7 Lowering Fan (For Down Flow Unit) ................................................................................................................... 17
3.8 Removing Fastener And Vibration Absorber ....................................................................................................... 19
3.9 Installation Inspection ......................................................................................................................................... 20
Chapter 4 Electrical Installation ......................................................................................................................................... 21
4.1 Installation Notes ................................................................................................................................................ 21
4.2 Wiring Of Indoor Unit .......................................................................................................................................... 21
4.2.1 Locating Electrical Ports Of Indoor Unit ................................................................................................... 21
4.2.2 Connecting Power Cable Of Indoor Unit .................................................................................................. 21
4.2.3 Connecting Control Cables ...................................................................................................................... 22
4.2.4 Connecting Solenoid Valve Of Pipe Extension Kit (Options, For Site Installation) ................................... 23
4.3 Wiring Of Condenser .......................................................................................................................................... 23
4.3.1 Connecting Control Signal Terminals ...................................................................................................... 23
4.3.2 Connecting Control Signal Cables ........................................................................................................... 24
4.4 Installation Inspection ......................................................................................................................................... 24
Chapter 5 Controller Operation Instructions ...................................................................................................................... 25
5.1 Appearance ........................................................................................................................................................ 25
5.2 Control Keys ....................................................................................................................................................... 25
5.3 Indicators ............................................................................................................................................................ 25
5.4 Control Interface ................................................................................................................................................. 26
5.4.1 Main Interface .......................................................................................................................................... 26
5.4.2 Shutdown Interface .................................................................................................................................. 26
5.4.3 Password Interface .................................................................................................................................. 27
5.5 Main Menu .......................................................................................................................................................... 27
5.6 Submenu ............................................................................................................................................................ 27
5.7 User Menu .......................................................................................................................................................... 28
5.7.1 User Menu Introduction ........................................................................................................................... 28
5.7.2 Alarm Menu ............................................................................................................................................. 28
5.7.3 Set Point Control ..................................................................................................................................... 30
5.7.4 Display Setting ......................................................................................................................................... 30
5.7.5 Graph Menu ............................................................................................................................................. 30
5.8 Professional Maintenance Menus ....................................................................................................................... 31
5.8.1 Professional Maintenance Menus Introduction ........................................................................................ 31
5.8.2 Alarm Menu ............................................................................................................................................. 31
5.8.3 System Status ......................................................................................................................................... 32
5.8.4 System Menu ........................................................................................................................................... 33
5.8.5 Run Hours ............................................................................................................................................... 37
5.8.6 On/Off Record ......................................................................................................................................... 37
5.8.7 Manual Mode ........................................................................................................................................... 38
5.8.8 Team Work .............................................................................................................................................. 38
Chapter 6 System Operation And Maintenance ................................................................................................................ 39
6.1 Monthly Routine Inspection Items ....................................................................................................................... 39
6.2 Routine Inspection Items (Half A Year) ............................................................................................................... 39
6.3 Self-diagnosis Function ....................................................................................................................................... 40
6.4 Electrical Connection Inspection ......................................................................................................................... 40

6.5 Control Component Appearance Inspection ....................................................................................................... 40
6.6 Air Cooled Condenser ......................................................................................................................................... 41
6.7 Filter .................................................................................................................................................................... 41
6.8 Infrared Humidifier .............................................................................................................................................. 42
6.9 Electric Heater .................................................................................................................................................... 42
Chapter 7 Troubleshooting ................................................................................................................................................ 43
7.1 Fan Troubleshooting ........................................................................................................................................... 43
7.2 Infrared Humidifier Troubleshooting .................................................................................................................... 43
7.3 Compressor and Cooling System Troubleshooting ............................................................................................. 43
7.4 Heating System Troubleshooting ........................................................................................................................ 44
Appendix 1 Circuit Diagram ............................................................................................................................................... 45
Appendix 2 Menu Structure of PACC Controller (Standard Configuration) ....................................................................... 47
Appendix 3 Alarm Control Menu Table.............................................................................................................................. 49
Appendix 4 Hazardous Substances or Elements Announcement ................................................................................... 50
Appendix 5 Monthly Routine Inspection Items .................................................................................................................. 51
Appendix 6 Routine Inspection Items (Half A Year) .......................................................................................................... 52

Foreword
Liebert.PEX+ series product is the precision air conditioner used in data center, which
is developed based on the Global R&D Platform of Emerson etwork Power Co.,
Ltd.(“Emerson” for short hereafter)
This manual focuses on the using instructions, including instructions for installation
preparations, mechanical installation, electrical installation, controller operation,
system operation and maintenance, and troubleshooting, etc. The system operation and
maintenance, trouble-shooting and handling are only limited to user’s independent
maintenance. For the maintenance and troubleshooting works not mentioned in this
manual, please contact Emerson professional engineer. The commissioning and startup
will be conducted by Emerson engineer, so this part is not described in this manual.
Please read this manual carefully before installing, maintaining and troubleshooting,
especially the warning information in the manual.

Chapter 1 Overview 1
Liebert. PEX+Series Precision Air Conditioner User Manual
Chapter 1 Overview
The Liebert.PEX+ series precision air conditioner (“Liebert.PEX+” for short hereafter) is professional equipment, which
should not be accessible to the general public. The Liebert.PEX+ is a medium-large size precision environment control
system, suitable for the environment control of the equipment room or computer room, featuring high reliability, high
sensible heat ratio and large air flow. This chapter introduces the model description, appearance, main components
and optional parts.
1.1 Model Description
The model description of Liebert.PEX+ is shown in Figure 1-1.
Figure 1-1 Model description
1.2 Appearance
Liebert.PEX+ appearance is shown in Figure 1-2 with P3080UA as an example.

Liebert. PEX+Series Precision Air Conditioner User Manual
2 Chapter 1 Overview
Figure 1-2 Appearance
1.3 Main Components and Optional Features
The components include indoor unit, condenser and remote monitoring software.
1.3.1 Components of Indoor Unit
The indoor unit includes compressor, evaporator, thermal expansion valve, infrared humidifier, DC speed-regulated
centrifugal fan (“EC fan” for short hereafter), electric heater, sight glass, filter drier and PACC (Precision
Air-Conditioner controller) controller.The descriptions of the components are given in Table 1-1.
Table 1-1 Descriptions of main components of indoor unit
Components Descriptions
Compressor  Highly effective Copeland scroll compressor is used, featuring low vibration, low noise and high
reliability.
 The Rotalock (screw thread) connection mode makes the maintenance easier.
Evaporator  Adopt a fin-tube heat exchanger with high efficiency.
 The distributor is designed and verified according to individual model to ensure that the refrigerant is
distributed evenly in each loop, improving the heat exchanger efficiency to a great extent.
Thermal
expansion valve
 Adopt a thermal expansion valve with external equalizer type. It collects temperature and pressure
signals at the same time to accurately regulate the refrigerant flow.
Infrared humidifier  The infrared humidifier has a simple structure, which is easy for teardown, cleaning and maintenance.
 Application of the infrared humidifier can reduce the dependence on water quality. It also features fast
startup, short humidifying time, large humidifying capacity and high humidifying efficiency.
Fan  PEX+ series use the EC fan, which features high efficiency, energy-saving, space-saving and low
noise.
 EC fan unit uses elaborate structure design, and the downflow unit uses the ‘in-floor’ design, which
positions the fan unit below the floor to further improve the efficiency of air supply.
Electric heater  The electric metal heater is used. It features fast heating speed and even heat and high reliability.
Sight glass  The sight glass is the window of the system cycle, for observing the refrigerant state, mainly the
moisture content of the system.When the moisture content exceeds the standard, the color will be
changed.
PACC
Controller
 Emerson Micro-processing controller with advanced PID regulation technology.
 LCD screen with blue backlight and 240 × 128 dot-matrix, simple user interface operation.
 The multi-level password protection can effectively prevent unauthorized operation.
 Self-recovery upon power failure, high-voltage & low-voltage protection.
 The operation time of main components is available through the menus.
 The expert-level fault diagnosis system can display the current fault information automatically,
facilitating the maintenance.
 It can store up to 200 records of history events.Configured with the RS485 port and standard
communication protocol of Ministry of Information Enterprise.
Filter drier  The filter drier eliminates the moisture effectively in the system, and also filtrates the impurities
generated during the long-term system operation so as to ensure normal system operation.

Chapter 1 Overview 3
Liebert. PEX+Series Precision Air Conditioner User Manual
1.3.2 Condenser
Refer to condenser user manual.
1.3.3 Remote Monitoring Software
Liebert.PEX+ uses the standard communication protocol defined by Ministry of Information Enterprise. Refer to
section 3 Intelligent device protocol, Po er Supply, Air Conditioner and Environmental Centralized Monitoring System
for details. Through the configured RS485 or TCP/IP port, Liebert.PEX+ can communicate with the host computer and
receive the control of the host software.
1.3.4 Optional Features
The optional parts include: Extension kit, low temperature kit, two-level electric heater, no heater, no humidifier,
plenum for upflow unit, electrode humidifier, water cooled unit and electronic expansion valve.
E tension kit
If there is a requirement for long piping / high vertical drop between the indoor unit and condenser according to actual
application condition, an extension kit shall be configured and the specific selection is described in 3.6.1 Pipe
Extension Kit (Optional) .
Low temperature kit
In winter (outdoor temperature below -15℃), the air conditioner shall use a low temperature kit for cooling. This kit is
inside the unit. User should consider the low temperature environment to make reasonable selection.
Two-stage electric heater
According to user requirement, a two-stage electric heater shall be used and the heating capacity shall be identical
with the one-stage heater
No heater
Liebert.PEX+ AC shall have the option without heating according to user requirements.
No humidifier
Liebert.PEX+ AC shall have the option without humidifying according to user requirements.
Plenum
The upflow unit shall be configured with a plenum with its configuration listed in 3.3.3 Plenum dimensions (for upflow
unit). For special plenum, please contact Emerson.
Electrode humidifier
Liebert.PEX+ AC shall have the option of electrode humidifier according to user requirements. The electrode
humidifier has a different requirement for water inlet / outlet pipes with the standard infrared humidifier. Refer to 3.6.3
Connecting water inlet pipe of humidifier for the configurations of water inlet/outlet pipes of electrode humidifier.
Water cooled unit
Non-standard water-cooled unit can be designed according to user requirements. The corresponding water inlet /
outlet pipes shall be configured for installation and the pipes shall connect to chilled water on user site. If the pipe is
below DN40, we recommend using threaded connection of galvanized pipe. When the pipe exceeds DN50, use
welded connection of seamless steel tubes. For the convenience of using and maintenance from user side to unit, we
recommend that users configure check valve, filter, thermometer, pressure gauge, sewage pipe and
vibration-absorbing joints; The cleanliness of water system must be detected before running the water system to avoid
affecting air conditioning system by sewage.
Electronic e pansion valve
The standard configuration is mechanical type thermal expansion valve, and optional electronic expansion valve can
be provided according to user requirements.
1.4 Transportation And Movement
Railroad transportation and shipping are recommended for transportation. If truck transportation is unavoidable,
choose roads that are less bumpy in order to protect the equipment. It is recommended to use mechanical equipment

Liebert. PEX+Series Precision Air Conditioner
4 Chapter 1 Overview
such as an electric forklift to unload and move the equipment.
below the pallet, as shown in Figure
the obliquity within the range from 75° to 105°, proper incline, as shown in
1.5 Storage Environment
The storage environment of
Liebert.PEX+
Item
General requirements
Indoor, clean, no dust
Ambient humidity 5%RH to 85
%
Ambient temperature -20℃ to +54
℃
Storage time
Total transportation and storage time should not exceed six months. Otherwise, the performance needs
to be re-
calibrated
Liebert. PEX+Series Precision Air Conditioner
User Manual
such as an electric forklift to unload and move the equipment.
If an electric forklift is used, insert the tines of the forklift
1-3 to prevent the equipment from falling over.
When moving the indoor unit, keep
the obliquity within the range from 75° to 105°, proper incline, as shown in
Figure 1-4.
Figure 1-3 Inserting and movement
Figure 1-4 Moving obliquity
Liebert.PEX+
meets the requirements of GB4798.1-
2005. See
Table 1-2 Storage environment requirement
Requirement
Indoor, clean, no dust
%
RH (non-condensing)
℃
Total transportation and storage time should not exceed six months. Otherwise, the performance needs
calibrated
105
75
If an electric forklift is used, insert the tines of the forklift
When moving the indoor unit, keep
2005. See
Table 1-2 for details.
Total transportation and storage time should not exceed six months. Otherwise, the performance needs

Chapter 2 Instructions for Installation Preparations 5
Liebert. PEX+Series Precision Air Conditioner User Manual
Chapter 2 Instructions for Installation Preparations
Liebert.PEX+ is professional equipment, and there are lots of complex installation works, so the preparation is very
important. This chapter details the installation preparation, including how to prepare the installation environment and
space and reserve the maintenance space, and how to unpack and inspect. Please read this chapter carefully before
installation.
2.1 Equipment Room Requirement
The requirements are as follows:
1. The equipment room should have good heat insulation.
2. The equipment room should have sealed damp proof layer. The damp proof layer of the ceiling and walls must use
polyethylene film or be applied with moisture proof paint. The coating of the concrete wall and the floor must be
damp proof.
3. All the doors and windows should be closed and the seams (if any) should be as narrow as possible to prevent the
outdoor air from entering the equipment room, which may increase the load of heating, cooling, humidifying and
dehumidification of the system. It is recommended that the inhalation of outdoor air be kept below 5% of the total
indoor airflow.
2.2 Installation Space
2.2.1 Installation Space Requirements
Adequate installation space for the indoor unit must be provided. The indoor unit of air cooled product must be
installed on the floor of equipment room or computer room, and the condenser can be installed on the ground of
outdoor or other room. The entire water cooled precision AC shall be installed on floor of equipment room or computer
room.

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 baffle the airflow, shorten the cooling cycle and result in air
return short circuit and air noise.

Avoid locating multiple indoor units close to each other. hat can result in crossing air patterns, unbalanced load and competitive
operation.

Do not install the unit in the vicinity of any precision equipment
, and prevent the leaked condensation water due to improper
use of the air conditioner from affecting the operation of precision equipment.

Do not install other devices (such as smoke detector) over the cabinet.
2.2.2 Maintenance Space requirement
Be sure to reserve maintenance space when installing the equipment. Leave a maintenance space of 850mm in front
of the air conditioner unit normally, and the minimal maintenance space is not less than 600mm.The requirement for
maintenance space is given in Figure 2-1.

6 Chapter 2 Instructions for Installation Preparations
Liebert. PEX+Series Precision Air Conditioner User Manual
Figure 2-1 Maintenance space of unit
2.3 Operating Environment
The operation environment of Liebert.PEX+ meets the requirements of GB4798.3-2007.See Table 2-1 for details.
Table 2-1 Operating environment requirement
Item Requirement
Ambient temperature Indoor 0°C ~ 40°C, the unit should not run in 32~40℃ environment for a long time.
Outdoor Water-cooled: 4°C ~ 45°C ; air-cooled: -34°C ~ +45°C
Protection level (indoor
unit) IP20
Altitude <1000m. Above that, derating is required
Operation voltage
range 380V (-10% ~ +15%), 3N~ 50Hz
 Note
When the unit is used in the following condition, please contact Emerson:
 If the unit voltage exceeds the operating voltage range.
 Derating for altitude above 1000m.
 Other applications outside of applicable scopes.
2.4 Unpacking And Inspection
2.4.1 Unpacking
Remove e ternal package
First, remove the packaging belt and carton, then the top cover, the sealing plastic film and finally the honeycomb
paper board, as shown in Figure 2-2.

Chapter 2 Instructions for Installation Preparations 7
Liebert. PEX+Series Precision Air Conditioner User Manual
Figure 2-2 Remove external package
Remove the base pallet
The unit is fixed onto the base pallet with 8 × 70 screw, as shown in Figure 2-3. You can use a 17mm open-end spanner,
ratchet spanner or sleeve to remove the fixing screw.
Figure 2-3 Positions of ooden scre s
2.4.2 Inspection
Check against the Packing List that the fittings are complete and the components are intact. If any parts are found
missing, or damaged, please report to the carrier immediately. If any hidden damages are found, please report to the
local offices of the carrier and Emerson.

8 Chapter 3 Mechanical Installation
Liebert. PEX+Series Precision Air Conditioner User Manual
Chapter 3 Mechanical Installation
To achieve the designed performance and maximize the product life, correct installation is vital. This chapter
introduces the installation notes, installation layout, installation procedures, piping and fan lowering operations.
3.1 Installation Notes
1. Prior to installation, be sure to read the whole contents of Chapter 2 Instructions for Installation Preparations, and
confirm that the installation positions have been confirmed according to the requirements of 2.2 .
2. Liebert.PEX+ air-cooled series air conditioner is designed for split floor installation. The indoor unit must be installed
on the floor of the equipment room or computer room, and the condenser can be installed outdoors or on the floor of
other rooms. The Liebert.PEX+ water-cooled air conditioner is designed for integrated floor installation. It should be
installed on the floor of the equipment room or computer room.
3. The selection, layout and fixing of the pipes shall comply with industrial standard.
4. Pressure drop, compressor oil return, noise reduction and vibration shall be considered in design and installation.
5. The unit shall be fixed by screws and mounting rails to avoid shaking during startup or operating processes.
3.2 System Installation Arrangement
3.2.1 Overall System Arrangement
The overall arrangement of Liebert.PEX+ series air conditioner is shown in Figure 3-1.
Figure 3-1 Overall system arrangement
Note:
1. The single system is used as an example to describe the double system.
2 ． ： Emerson piping.
3 ． ： Field piping (by technicians).
4 ． *: Components are not supplied by Emerson but are recommended for proper circuit operation and maintenance.
5
． +: Components are required hen the equivalent length exceeds 30m.

Chapter 3 Mechanical Installation 9
Liebert. PEX+Series Precision Air Conditioner User Manual
3.2.2 System Installation Illustration
The installation modes of the unit are shown in Figure 3-2 and Figure 3-3.
Figure 3-2 Condenser installed higher than compressor
Figure 3-3 Condenser installed lo er than compressor
 Note
 If the condenser is installed higher than the compressor (see Figure 3-2), a back bend should be fitted to the discharge
line and liquid line of the condenser, so as to prevent the liquid refrigerant from flowing back when the condenser stops.
 he top end of the back bend must be installed higher than the highest copper pipe of the condenser.
3.3 Mechanical Parameters
3.3.1 Dimensions and weight of indoor unit
The dimensions and weight of the indoor unit are shown in Figure 3-4, Figure 3-5 and Table 3-1.
Drain pipe for condensed water
gas pipe slope
Thermal isolation
layer under floor FloorCopper pipe bracket
Liquid pipe (avoid direct sun shine)
Oil trap
Invert bend (higher than the top copper pipe of condenser)
Outdoor unit
Indoor unit
Sealed
Water inlet pipe of humidifier
Movable floor

10 Chapter 3 Mechanical Installation
Liebert. PEX+Series Precision Air Conditioner User Manual
H
W
Figure 3-4 Outline dra ings of the upflo indoor unit (unit: mm)
W
D
H
W
H
D
D
W
H
Figure 3-5 Outline dra ings of the do n flo indoor unit
Table 3-1 Dimensions and eight of indoor unit
Model Dimensions (W×D×H)(mm) Net weight (kg)
P1020U(D)A13C 853×874×1970 320
P1025U(D)A13C 853×874×1970 340
P1030U(D)A13C 1130×995×1975 436
P 1035U(D)A13C 1130×995×1975 440
P 1035U(D)A13S 1130×995×1975 460
P 1040U(D)A13C 1330×995×1975 470
P 1040U(D)A13S 1330×995×1975 480
P 1045U(D)A13C 1330×995×1975 530
P 1050U(D)A13C 1330×995×1975 535
P 1050U(D)A13S 1330×995×1975 570
P 2060U(D)A13S 1830×995×1975 690
P 2070U(D)A13S 1830×995×1975 730
P 3080U(D)A13S 2230×995×1975 770
P 3090U(D)A13S 2230×995×1975 808
P 3100U(D)A13S 2230×995×1975 810
3.3.2 Dimensions and weight of condenser
Refer to condenser user manual for the condenser dimensions and weight.
3.3.3 Plenum dimensions (for upflow unit)
The dimensions of plenum are shown in Table 3-2.
Table 3-2 Plenum dimensions (unit: mm)
Model D(Depth) W(Width) H(Height)
P1020~1025 857 863 400（600 optional）

Chapter 3 Mechanical Installation 11
Liebert. PEX+Series Precision Air Conditioner User Manual
Model D(Depth) W(Width) H(Height)
P1030 to P1035 965 730 400(600, optional)
P1040 to P1050 965 930 400(600, optional)
P2060 to P2070 965 1430 400(600, optional)
P3080 to P3100 965 1830 400(600, optional)
 Note

If the height of the plenum selected for air conditioner unit exceeds 600mm, consult Emerson for non-standard production.
3.3.4 Positions and dimensions of air outlet
Base pallet cut-out location dimensions
The cutout position and dimensions are shown in Figure 3-6.
140
45
181
72
161 161
181
72
72
210
250
161
C/R
P
C/R
850
798
190
P1020 and P1025 unit cut-out location
1130mm/1830mm unit cut-out location
1330mm/2230mm unit cut-out location
P: Cable inlet/outlet D: Drain pipe hole
H: Humidifier incoming ater pipe hole C/R: cooling ater inlet and outlet pipe holes/refrigerant inlet
and outlet pipe holes
Figure 3-6 Base pallet cut-out locations of upflo series (unit: mm)
70
120
49
H
D
69
320
C / R
P
1130
70
120
49
H
D
69
320
C / R
P
1830
H
D
205
63
69
320
C / R
P
155
1330
H
D
320
205
C / R
P
155
69 63
2230

12 Chapter 3 Mechanical Installation
Liebert. PEX+Series Precision Air Conditioner User Manual
Position and dimensions of air outlet on top cover
The position and dimensions of air outlet on top cover of upflow unit are shown in Figure 3-7 and Table 3-3.
Figure 3-7 Position of air outlet on top cover of upflo unit
Table 3-3 Dimensions of air outlet on top cover of upflo unit (unit:mm)
Model A B C
P1020～P1025 720 795 800
P1030～P1035 650 900 700
P1040～P1050 850 900 900
P2060～P2070 650 900 1400
P3080～P3100 850 900 1800
Side panel knock-out locations
If piping and wiring from the base are difficult, connection from side panel can be selected. The locations and
dimensions of knock-out holes are shown in Figure 3-8.You should select the inlet and outlet holes according to the
actual needs. Ensure only one service is used per opening.
P1020 and P1025 series knock-out
A
B
C
AA
B
C