Vertiv P1025UA13C User manual

Liebert® PEX+ Series
Precision Air Conditioning
Technical Manual

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 specified in the contract, all statements, information, and
recommendations in this document are provided "AS IS" without warranties, guarantees or
representations of any kind, either express or implied. The information in this document is
subject to change without notice. Every effort has been made in the preparation of this
document to ensure the accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or
implied.
Vertiv Co., Ltd.
•China
Website: www.vertivco.com
E-mail: s[email protected]
Customer service hotline: [phone]
•Asia Pacific
Homepage: www.vertivco.com.
E-mail: [e-mail]
For Technical Support, users may contact the nearest Vertiv Co. local sales office or service
centre.

Purpose of the Document
This document applies to the Liebert PEX+ series of precision air conditioners cooling solutions
which maintain an optimal environmental control mainly for technological ecosystems at
minimal operating costs. This document gives an overview of the technical specification. The
figures used in this document are for reference only. Please read this manual carefully.
Styling used in this Guide
The styles used in the manual will be defined as mentioned in the following table:
Situation Description
Warning/Danger/Caution
The Warning/Danger/Caution
note indicates a
hazardous or potentially harmful situation that can
result in death or injury. It also indicates instructions
that need to be adhered to, failing which may result
in danger and safety issues thereby having an
adverse effect on the reliabi
lity of the device and
security. Even for practices not related to physical
injury, the content under the Warning heading is
used for precautions which need to be taken which,
otherwise, could result in equipment damage,
performance degradation, or interruption in service.
Note
The Note
section indicates additional and useful
information. 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 definitions, concepts, and
terminologies used in the manual.
Version History
Issue Revision Change
31020862 V1.0 -

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Vertiv I Liebert PEX+ I Technical Manual
TABLE OF CONTENTS
1 Product Overview ................................................................. 3
1.1 Product Introduction ........................................................................................................ 3
1.2 Model Description ......................................................................................................................... 4
2 Components & Features ...................................................... 5
2.1 Components...............................................................................................................................5
2.1.1 Compressor .............................................................................................................................................................................5
2.1.2 Evaporator ........................................................................................................................................................................................................5
2.1.3 Thermal Expansion Valve...................................................................................................................................................................6
2.1.4 Infrared humidifier.....................................................................................................................................................................................6
2.1.5 EC Fans................................................................................................................................................................................................................7
2.1.6 Electric Heater..............................................................................................................................................................................................7
2.1.7 Sight Glass ........................................................................................................................................................................................................8
2.1.8 iCOM Controller...........................................................................................................................................................................................8
2.1.9 Filter Drier..........................................................................................................................................................................................................9
2.1.10 Condenser......................................................................................................................................................................................................9
3 Model Nomenclature.......................................................... 10
4 Operating Parameters ........................................................ 11
4.1 Storage Environment ............................................................................................................11
4.2 Operating Environment .......................................................................................................11
5Technical Parameters.........................................................12
5.1 Technical Specifications ..................................................................................................... 12
6 iCOM Controller ...................................................................12
6.1 Features..............................................................................................................................................................................................................14
6.2 iCOM Components...................................................................................................................................................................................15
6.3 iCOM Display Components & Functions ..............................................................................................................................16

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Vertiv I Liebert PEX+ I Technical Manual
7 Mechanical Parameters ......................................................18
7.1 Positions and dimensions of air outlet ........................................................................... 18
7.1.1 Base pallet cut-out location dimensions............................................................................................................................18
7.1.2 Position and dimensions of air outlet on top cover..................................................................................................19
7.1.3 Side panel knock-out locations .................................................................................................................................................19
7.2 Plenum dimensions (for Upflow unit) ...........................................................................20
7.3 Installation Space Requirements.................................................................................... 22
7.4 Maintenance Space requirement ................................................................................... 22
7.5 System Installation Arrangement .................................................................................. 23
7.6 Recommended Pipe sizes ................................................................................................. 24
8 Electrical Parameters ........................................................ 25
8.1 Power Cable Specifications .............................................................................................. 25
9 Optional Components........................................................ 26
9.1 Electronic Expansion Valve (EEV).................................................................................. 26
9.2 Electrode humidifier............................................................................................................ 26
9.3 Extended piping kit ............................................................................................................. 26
9.4 Low temperature kit ........................................................................................................... 27
9.5 Two stage electric heater ................................................................................................. 27
9.6 Up flow Plenum ..................................................................................................................... 27
9.7 High efficiency Filter........................................................................................................... 27
9.8 Water leakage alarm ........................................................................................................... 27
9.9 Smoke and fire detectors.................................................................................................. 28
9.10 Supply Air Temperature Sensor.................................................................................... 28
9.11 Supply Air Pressure Sensor............................................................................................. 28
9.12 Remote Sensor .................................................................................................................... 28
9.13 Smoke sensor....................................................................................................................... 28
9.14 IS - Unity card ...................................................................................................................... 28

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Vertiv I Liebert PEX+ I Technical Manual
1 Product Overview
1.1 Product Introduction
The Liebert PEX+ series is the next generation series of air conditioners that provide precise
environmental control. The Liebert PEX+ models are the latest in the long line of modern
enterprise-grade products from the Liebert family. Incorporating the high standards
associated with the Liebert name, the PEX+ series utilizes the latest technology, system
components, and streamlined manufacturing process.
Liebert PEX+ air conditioners are products that are specifically created and designed for the
data centers, computer rooms, and similar ecosystems which call for a high degree of accuracy
and precision. It addresses the needs and challenges associated with such applications and
setups. It caters to sensitive applications which need a suitable environment for optimal
performance. Therefore, care should 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 specific range but also must have the precision to react quickly to a drastic change in
heat load and prevent wide temperature fluctuations.
The PEX+ air cooled AC unit is packed with features such as high reliability, high sensible heat
ratio, and large airflow. It is an excellent system that adheres to the standards in Precision Air
Cooling in terms of energy-efficiency, space requirements, and reliability.

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Vertiv I Liebert PEX+ I Technical Manual
1.2 Model Description
The Liebert PEX+ appearance is shown in Figure 1-1.
Figure 1-1 PEX+ Model
Figure 1-2 Main Components

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Vertiv I Liebert PEX+ I Technical Manual
2Components & Features
This section gives an overview of the main components and its features in the PEX+ series of
air conditioners.
2.1 Components
2.1.1 Compressor
The Liebert PEX+ series models comprise of a Copeland scroll compressor which has a host of
promising features such as low operating noise, less vibration, and high reliability. The
Rotalock (screw thread) connection mode makes the maintenance easier. Its compactness,
smooth compression with scroll operation and high energy efficiency ratio make it an ideal
compressor to bank on for the PEX+ series.
Figure 2-1 Compressor
2.1.2 Evaporator
The evaporator consists of a V-coil (for up flow)/A-coil (for down flow) incorporating draw-
through air design for uniform air distribution. The coil is constructed of enhanced surface
aluminum fins mechanically bonded to enhanced surface copper tubes. The coil frame is
fabricated from hot dipped galvanized sheet metal and the stainless-steel condensate drip
tray. Hydrophilic coating on cooling coil enhances longevity.
The sophisticated design of the distributor ensures that the refrigerant is distributed evenly in
each loop, thereby improving the effectiveness of the heat exchanger.
Figure 2-2 Evaporator

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Vertiv I Liebert PEX+ I Technical Manual
2.1.3 Thermal Expansion Valve
The thermal expansion valve with external equalizer can automatically regulate refrigerant
flow according to the operation condition of the refrigeration system to optimize the
performance of the unit in the change of indoor and outdoor temperature.
Figure 2-3 Thermal Expansion Valve
2.1.4 Infrared humidifier
The infrared humidifier consists of infrared humidifier lamp, water injection valve, humidifying
water dish, temperature alarm protection devices and water level alarm device.
The infrared humidifier in the Liebert PEX+ series provides quicker and more responsive
operation which is quite important for mission-critical applications. These humidifiers reduce
the dependency of water quality and simultaneously achieve full capacity in quick time using
almost any water quality.
Figure 2-4 Infrared Humidifier

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Vertiv I Liebert PEX+ I Technical Manual
2.1.5 EC Fans
The EC Fans used in the Liebert PEX+ models are energy-efficient and innovative with
integrated electronics and a maintenance-free design.
•Ability to regulate the airflow and reduce the fan input power leading to high energy-
efficiency.
•Easy-to-connect facility with minimum wiring leading to a high performance with a
great variety of possible air flow rates.
Figure 2-5 EC Fans
2.1.6 Electric Heater
In the PEX+ models, the PTC heaters are used as they have lower running temperatures,
thereby ensuring operational safety.
•Less susceptible to overheating and long lasting due to less wear
•Lower Maintenance and Smooth operation
Figure 2-6 Electric Heater

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Vertiv I Liebert PEX+ I Technical Manual
2.1.7 Sight Glass
The sight glass is a utility for observing the refrigerant state; specifically, the moisture content
of the system. If the moisture content exceeds the levels of defined standards the color
changes, thereby, indicating irregularity in the moisture content.
Figure 2-7 Sight Glass
2.1.8 iCOM Controller
The iCOM Controller used in PEX+ provides a simple operational user-interface and is
developed using the latest and highly advanced PID regulation technology.
Liebert iCOM’s menu-driven display is used for all programming functions on each connected
cooling unit. The Status menu displays the status of the conditioned space, such as room
temperature and humidity, temperature and humidity setpoints, alarm status and settings,
event histories and the current time.
Figure 2-8 iCOM Controller

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Vertiv I Liebert PEX+ I Technical Manual
2.1.9 Filter Drier
Moisture can have an adverse effect on the operation and life of a system in the refrigeration
cycle.
To counter that effect, Filter-driers are used to filter out particles and remove and hold
moisture to prevent it from circulating through the system. The Liebert PEX+ AC consists of
nylon filter material with big mesh. The filter features compact structure and easy
maintenance. It can be washed repeatedly.
Figure 2-9 Filter Drier
2.1.10 Condenser
The Liebert range of air conditioners offers many advantages, some of which are listed below:
•Antirust aluminum cabinets
•Low sound levels
•High reliability over a wide range of ambient conditions
Figure 2-10 Condenser

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Vertiv I Liebert PEX+ I Technical Manual
3Model Nomenclature
The model of the PEX+ series AC is fully-defined by twenty-five digits, as shown in Figure 3-1.
12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
P 1 0 5 0 D A 1 3 S H S 1 2 S 1 D 0 0 0 C E 0 L 0
Digit 1 Product model Digit 16 Enclosure options
PPEX+ 1Standard Color black orange peel grain coating
Digit 2 Product model 2White orange peel grain coating
1-2
Number of Modules/Bays
6Color Charcoal grey
Digit 3 Cooling Capacity kW
Digit 17 Mains Switch High Voltage Option
0-9 Nominal Net Cooling Capacity - kW DMain non-Locking Disconnect
Digit 4 Cooling Capacity kW PDual Power Supply Parallel
0-9 Nominal Net Cooling Capacity - kW ADual Power Supply Auto Alternate(Interlocking contactor)
Digit 5 Cooling Capacity kW TDual Power Supply Auto Alternate(ATS)
0-9 Nominal Net Cooling Capacity - kW Digit 18 Lock Out Low Voltage Option
Digit 6 Air Discharge 0None
U Upflow H Reheat & Humidity Lockout
DDownflow Digit 19 Monitoring
Digit 7 System type 0No Card
AAir cooled 7Unity card
WWater cooled 8
Unity card*2
DDual Cool-Chilled water+Air cooled Digit 20 Sensors
H
Dual Cool-Chilled water+Water cooled
0None
Digit 8 Airflow SSmoke Sensor
1EC plug fan-Standard Static HHigh Temperature
Digit 9 Power Supply FSmoke & High Temp
3380-415V / 3ph / 50Hz+N RRemote sensor
T380V / 3ph / 60Hz+N NSupply Air Temperature Sensor
Digit 10 Cooling System ASupply air pressure sensor
CCompliant Scroll Single Circuit, R407C XOther sensors
SCompliant Scroll Dual Circuit, R407C Digit 21 Packaging
E Digital Scroll Single Circuit, R407C PPackaging - Standard Cardboard and Wooden Pallet
DDigital Scroll Dual Circuit, R407C CPackaging - Wooden crate
4Compliant Scroll Single Circuit, R410A
Digit 22 Special Requirements
6Compliant Scroll Dual Circuit, R410A EFor Export
7Digital Scroll Single Circuit, R410A Digit 23 Order Identifier
TDigital Scroll Dual Circuit, R410A 0Standard Static
Digit 11 Humidification 1High ESP 100 Pa
0None 2High ESP 200 Pa
H
Infrared Humidifier
3High Airflow/ESP other
SElectrode humidifier XSFA Included
Digit 12 Display Digit 24 Order Identifier
SStandard Display 0None
LLarge Display LAir cooled-long piping>30m
Digit 13 Re-Heating CLow temp Kits
0None BLow temp Kits+Long piping
1Electric heating Std 1 Stage XSFA Included
2Electric heating Opt. 2 Stage Digit 25 Order Identifier
Digit 14 Filtration 0None
2G4 XSFA Included
3F5
Digit 15 Coil and Valves
SStandard DX Air cooled coil，TXV
EStandard DX Air cooled coil，EEV
Figure 3- 1 Nomenclature

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Vertiv I Liebert PEX+ I Technical Manual
4 Operating Parameters
Refer the following tables 4.1 and 4.2 for the Storage Environment and Operating Environment.
4.1 Storage Environment
Table 4. 1 Storage environment requirements
Item Requirement
General requirements Indoor, clean, no dust
Ambient humidity 5%RH to 85%RH (non-condensing)
Ambient temperature -20
℃
to +54°C
Storage time Total transportation and storage time should not exceed six
months. Otherwise, the performance needs to be re-
calibrated
4.2 Operating Environment
The operating environment of the Liebert PEX+ meets the requirements of GB4798.3-2007.
Refer the Table in 4.2 for details.
Table 4. 2 Operating environment requirement
Item Requirement
Ambient temperature
Indoor
18°C ~ 32°C
Outdoor Air-cooled: -35°C～+45°C
(Low-temp. kit is
required when the temperature is below -15°C)
Protection level (indoor unit) IP20
Altitude <1000m. Above that, derating is required
Operation voltage range 380V (-10% ~ +15%), 3N~ 50Hz
When the unit is used in the following condition, Contact Vertiv Co.
•If the unit voltage exceeds the operating voltage range.
•Derating for altitude above 1000m.
•Other applications outside of applicable scopes.

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Vertiv I Liebert PEX+ I Technical Manual
5 Technical Parameters
5.1 Technical Specifications
The technical specification of PEX+ Downflow and Upflow Air cooled unit with Fixed Scroll
Compressor is mentioned in table 5.1.
Table 5.1
•Performance tolerance is 5%
•For net capacities, deduct fan input power. Refer to the Liebert PEX+ Rating for
specific input conditions, air flow, and configuration
•*1: The above cooling capacity is based on condensing temperature of 45°C
•*2: For downflow unit ESP 20 Pa & for upflow unit ESP50Pa considered
•*3: Fixed Scroll compressor with R407C based refrigerant
•Standard offer is with TXV, EEV is available on request
•Water cooled condenser can be offered on request
Model P1020 P1025 P1030 P1035 P1040 P1050 P2060 P2070 P2080 P2090 P2100
Gross Cooling capacity and Sensible cooling capacity (kW)
Cooling
capacity*¹
(24 ºC DB
50%RH)
22.3 31.1 37.1 41.4 45.9 54.5 74.4 77.9 91.3 102.1 109.0
Sensible
cooling
capacity
(24ºC DB
50%RH)
19.4 26.9 32.4 35.9 40.1 48 64.9 68.7 80 89.6 95.8
Indoor unit Fan section
Std. Air
volume
(m³/hr)
5500 6700 8000 9000 10600 12200 16000 18000 21200 24400 24400
Fan
number
1 1 1 1 1 1 2 2 2 2 2
Fan power
(kW)*²
Downflow
0.64 1.02 1.47 1.83 1.51 1.86 2.94 3.65 3 3.72 3.72
Fan power
(kW)*² -
Upflow
0.72 1.12 1.57 1.94 1.77 2.22 3.15 3.87 3.55 4.43 4.43
Compressor*³
Number 1 1 1 1 1 1 2 2 2 2 2
PTC type Electric heater
Power
(kW)
6 6 6 6 9 9 9 9 12 12 12
Infrared humidifier
Humidifyin
g capacity
(kg/h)
4.5 4.5 4.5 4.5 4.5 4.5 10 10 10 10 10
Unit Footprint
Unit
dimension
(W*D*H)
(mm)
853X874 X 1970 1130 X 995 X 1975 1330 X 995
X 1975
1830 X 995
X 1975
2230 X 995 X 1975
Indoor Unit Weight
Net weight
(kg)
320 340 400 420 460 530 690 730 770 805 810

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Vertiv I Liebert PEX+ I Technical Manual
The technical specification of PEX+ Downflow and Upflow Air cooled unit with Digital Scroll
Compressor is mentioned in table 5.2
Table 5.2
•Performance tolerance 5%
•For net capacities, deduct fan input power. Refer to the Liebert PEX+ Rating
for specific input conditions, air flow, and configuration.
•*1: The above cooling capacity is based on condensing temperature of 45°C
•*2: For downflow unit ESP 20Pa & for upflow unit ESP 50Pa considered
•*3: Digital Scroll compressor equipped with R407C refrigerant
•Standard offer is with TXV, EEV is available on request
•Water cooled condenser can be offered on request
Model P1020 P1025 P1030 P1040 P1050 P2060
Gross Cooling capacity and Sensible cooling capacity (kW)
Cooling capacity*¹
(24
∘
C DB
50%RH)
22.6 25.5 33.7 45.7 50.1 66.0
Sensible cooling
capacity (24
∘
C
DB 50%RH)
19.5 23.4 29.3 39.4 44.2 58.0
Indoor unit Fan section
Std. Air volume
(m³/hr)
5500 6700 8000 10600 12200 16000
Fan number 1 1 1 1 1 2
Fan power (kW)*²
- Downflow
0.6 1.0 1.5 1.5 1.9 2.9
Fan power (kW)*²
- Upflow
0.7 1.1 1.6 1.8 2.2 3.1
Compressor*³
Number 1 1 1 2 2 2
PTC type Electric heater
Power (kW) 6 6 6 9 9 9
Infrared humidifier
Humidifying
capacity (kg/h)
4.5 4.5 4.5 4.5 4.5 10
Unit Footprint
Unit dimension
(W*D*H) (mm)
853 X 874 X 1970 1130 X 995
X 1975
1330 X 995
X 1975
1830 X 995
X 1975
Indoor Unit Weight
Net weight (kg) 320 340 440 460 530 690

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Vertiv I Liebert PEX+ I Technical Manual
6iCOM Controller
The Liebert iCOM offers the highest capabilities in unit control, communication and
monitoring of Liebert mission-critical cooling units.
Liebert iCOM may be used to combine multiple cooling units into a team that operates as a
single entity, enhancing the already-high performance and efficiency of Liebert’s units.
Large graphic display wall-mount versions of the control are available for remote operation
and monitoring of cooling units.
6.1 Features
Large and Small Displays
The Liebert iCOM is available with either a large or small liquid crystal display.
•The Liebert iCOM with small display has a 128 x 64 dot matrix screen that
simultaneously shows two menu icons, along with descriptive text.
•The Liebert iCOM with large display has a 320 x 240 dot matrix screen that shows up
to 16 menu icons at a time, as well as descriptive text. This display may be used to
control a single cooling unit or any cooling unit on a network, regardless of how it is
connected - either integrated into a cooling unit or simply connected to the network
and mounted remotely.
Liebert iCOM’s menu-driven display is used for all programming functions on each
connected cooling unit. The Status menu shows the status of the conditioned space, such as
room temperature and humidity, temperature and humidity setpoints, alarm status and
settings, event histories and the current time.

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Vertiv I Liebert PEX+ I Technical Manual
6.2 iCOM Components
Figure 6- 1 Wall Mount Large Display Figure 6 - 2 Direct Panel Mount Large Display
and Bezel
Figure 6 - 3 Direct Panel Mount Small Figure 6 - 4 Liebert iCOM Display and Bezel
Input/Output Board

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Vertiv I Liebert PEX+ I Technical Manual
6.3 iCOM Display Components & Functions
The small and the large display have a common key layout, as depicted in the figure 6-5
Figure 6-5 Liebert iCOM components
•The Help key may be pressed at any time for a brief explanation of what is being
viewed.
•The risk of inadvertent system shutdown can cause loss of cooling and equipment
damage.
•Press the On/Off key on a Liebert iCOM large display while the system screen is
shown permits shutting down all units on the network.
•Large Liebert iCOM displays can view and control other units on the network when
they are in the same group. When turning a unit Off or On with the large display,
make sure that the unit to be shut down or started up is shown on the screen. If the
system screen is shown and the On/Off key is pressed, the Liebert iCOM shows a
notification that pressing the On/Off key again will turn Off all units on the network.

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Vertiv I Liebert PEX+ I Technical Manual
6.3.1 Keyboard icons and functions
The following table 6.1 depicts the keyboard icons and functions
Table 6.1
Icon
Key Name Function
On/Off Key Begins Shutdown or Startup
Alarm Key Silences/Resets an alarm
Help Key Accesses integrated help menus
Escape Key Returns to the previous display view
Enter Key Confirms all selections and selects icons or text
Increase Key
(Up Arrow)
Moves upward in a menu or increases the value of a selected
parameter
Decrease
Key (Down
Arrow)
Moves downward in a menu or reduces the value of a selected
parameter
Left and
Right Arrow
Keys
Navigates through text and sections of the display
Upper LED
Blinking Red—Active, unacknowledged alarm exists
Solid Red—Active, acknowledged alarm exists
Lower LED
Amber—Power is available to the unit, unit is NOT operating
Green—Power is available to the unit, unit is operating
Lower LED Green and Amber LEDs will flash alternately when the unit is in
Standby