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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: 4008876510
E-mail: support@emersonnetwork.com.cn
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Table of Contents
Troubleshooting
Related Manuals for Liebert PEX+ Series
Summary of Contents for Liebert PEX+ Series
- Page 1 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.
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Page 3: Table Of Contents
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 ............................ - Page 4 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 ....................
- Page 5 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 .....................
- Page 7 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 Network 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.
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Page 9: 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. -
Page 10: Main Components And Optional Features
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. PEX+ series use the EC fan, which features high efficiency, energy-saving, space-saving and low noise. -
Page 11: Condenser
Liebert.PEX+ uses the standard communication protocol defined by Ministry of Information Enterprise. Refer to section 3 Intelligent device protocol, Power 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. -
Page 12: Storage Environment
75° to 105°, proper incline, as shown in Figure 1-4. Figure 1-3 Inserting and movement Figure 1-4 Moving obliquity 1.5 Storage Environment The storage environment of Liebert.PEX+ Liebert.PEX+ meets the requirements of GB4798.1-2005. See 2005. See Table 1-2 for details. Table 1-2 Storage environment requirement Item Requirement... -
Page 13: Chapter 2 Instructions For Installation Preparations
Chapter 2 Instructions for Installation Preparations 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. -
Page 14: Operating Environment
Chapter 2 Instructions for Installation Preparations 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 Indoor 0°C ~ 40°C, the unit should not run in 32~40℃ environment for a long time. -
Page 15: 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. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 16: Chapter 3 Mechanical Installation
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. -
Page 17: System Installation Illustration
The 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. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 18: 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) 400（600 optional） P1020~1025 Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 19: Positions And Dimensions Of Air Outlet
D: Drain pipe hole H: Humidifier incoming water pipe hole C/R: cooling water inlet and outlet pipe holes/refrigerant inlet and outlet pipe holes Figure 3-6 Base pallet cut-out locations of upflow series (unit: mm) Liebert. PEX+Series Precision Air Conditioner User Manual... - Page 20 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 Liebert. PEX+Series Precision Air Conditioner User Manual...
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Page 21: Installing Indoor Unit
Table 3-4 for details. Table 3-4 Dimensions of rubber cushion for vibration absorbing (unit: mm) Item Specification Thickness:3mm to 5mm Rubber Lateral Thickness:2mm to 3mm cushion Bottom Thickness:10mm to 12mm Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 22: Install Indoor Unit Cabinet
When connecting the drain pipe, you must make sure that the U bend is installed vertically and the ‘U’ shape is not distorted, so as to ensure that the condensate can be drained immediately and effectively. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 23: Connecting Water Inlet Pipe Of Humidifier
1. Select the size of connection pipes of the indoor unit. Considering the effect of the pipe diameter on the system pressure drop, the pipe diameter of the indoor unit and outdoor unit should be determined according to the specifications listed in Table 3-7, or consult the technicians in local Emerson office. Liebert. PEX+Series Precision Air Conditioner User Manual... - Page 24 P3090 P3100 Model (dual system) (dual system) (dual system) (single system) (dual system) (dual system) Pipe length 40m* 50m* 60m* Note: 1. Extension kit should be added to the “Eq.Lgth” marked with *. Liebert. PEX+Series Precision Air Conditioner User Manual...
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Page 25: Installing Pipe Extension Kit (Optional, For Site Installation)
3-13, totally 2 PCS) of the L shaped lifting component to make sure that it is fixed properly, and then install the fixing bolts and washers IV (totally 4 PCS) of the winch bracket, as shown in Figure 3-13; Liebert. PEX+Series Precision Air Conditioner User Manual... - Page 26 7. Remove the fixing bolts and washers II (see Figure 3-13, totally 2 PCS) of the L shaped lifting component, and take out the L shaped lifting component. At this point, the operation of lowering the fan of one-bay unit is completed. Liebert. PEX+Series Precision Air Conditioner User Manual...
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Page 27: Removing Fastener And Vibration Absorber
Figure 3-17.Remove the rubber string before unit operation. Otherwise, the unit cannot detect the high water-level alarm. Do not touch the lamps with bare fingers. HWA plug terminal Plug terminal for water level switch Figure 3-17 Floating pole of high water-level switch Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 28: Installation Inspection
The upflow unit must have plenum or have air supply pipe connection, and the fan and heater shall not be accessible after installation. After confirming the preceding points, you can start the electrical installation. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 29: Chapter 4 Electrical Installation
Start electrical installation after mechanical installation is done. This chapter introduces the electrical installation of the chapter introduces the electrical installation of the Liebert.PEX+ AC, including installation notes, , including installation notes, and the wiring of indoor unit, and condenser power cables. -
Page 30: Connecting Control Cables
The position of field connection terminals is shown in Figure 4-1, and the amplified figure is shown in Figure 4-3.The upper part of the terminal block is connected to the unit, while the lower part serves as user control signal interfaces. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 31: Connecting Solenoid Valve Of Pipe Extension Kit (Options, For Site Installation)
4.3 Wiring Of Condenser 4.3.1 Connecting Control Signal Terminals 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. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 32: Connecting Control Signal Cables
Wiring of a condenser with single system used to match an indoor unit with single system The digital signal of dry contact J6 on the board (see 3.1 Cable terminals in Liebert PEX Condenser User Manual for the locations) is connected with the control terminals 70#/71# (see Figure 4-3) of the indoor unit. -
Page 33: Chapter 5 Controller Operation Instructions
Chapter 5 Controller Operation Instructions Chapter 5 Controller Operation Instructions Liebert.PEX+ AC uses PACC controller (“controller” for short hereafter), which has simple user interface and easy to operate menu structure. This chapter describes the appearance, control key, indicators, control interface and menus of the controller. -
Page 34: Control Interface
The displayed shutdown interface is dependent on the shutdown mode of the air The displayed shutdown interface is dependent on the shutdown mode of the air conditioner unit. Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 35: Password Interface
The menus are classified into user menus and professional maintenance menus according to different password protection levels. User menus are described in 5.7 User Menu and professional maintenance menus are described in 5.8 Professional Maintenance Menus. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 36: User Menu
Press Up and Down in Main Menu 1/2 to move cursor to Alarm Menu and press Enter to enter the Alarm Menu interface. This menu has five submenus as shown in Figure 5-6. Liebert. PEX+Series Precision Air Conditioner User Manual... - Page 37 The controller can store up to 200 history alarm records. They will not be alarm records. They will not be cleared upon power failure. Figure 5-9 Alarm history Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual User Manual...
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Page 38: Set Point Control
UP or DOWN the UP or DOWN key to zoom the graph in or out. TEMP Graph D00 I00 -030 20:27 Figure 5-13 Temperature graph interface Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 39: Professional Maintenance Menus
Compressor 1 HP Alarm is generated, its corresponding record on the is generated, its corresponding record on the Alarm Status Alarm Status menu will be cleared. Figure 5-15 Alarm reset Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual User Manual... -
Page 40: System Status
Customer Input Status items. Figure 5-18 System status Output status The Output Status menu is as shown in menu is as shown in Figure 5-19. Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 41: System Menu
Enter to enter the System Menu. The menu is displayed in two screens, as shown in is displayed in two screens, as shown in Figure 5-23. Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual User Manual... - Page 42 The System Config menu is as shown in Figure 5-27, including option menus, delay setting, air flow detection, water circuit setting and EC fan control. Figure 5-27 System config 1. Option menu The option menu is shown in Figure 5-28.Only Emerson technicians can access this menu. Liebert. PEX+Series Precision Air Conditioner User Manual...
- Page 43 System static pressure setting : 25Pa Figure 5-32 EC fan control Sensor calibration The Sensor Calibration menu is as shown in menu is as shown in Figure 5-33. Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual User Manual...
- Page 44 The password protection menu is as shown in Figure 5-37. Figure 5-37 Password protection Parameter reset The Parameter Reset interface is as shown in interface is as shown in Figure 5-38. Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual...
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Page 45: Run Hours
-42.The menu items include on/off records (total record number), No. ( s include on/off records (total record number), No. (Record SN) and time (fan on and off time). Liebert. PEX+Series Precision Air Conditioner Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 46: Manual Mode
# 05 - # 06 - # 07 - # 08 - # 09 - # 10 - # 11 - # 12 - # 13 - # 14 - # 15 - Standby Offline Figure 5-44 Team work interface Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 47: Chapter 6 System Operation And Maintenance
, infrared humidifier and electric heating maintenance guidance. During the operation of the Liebert.PEX+ , lethal voltage may be present in theequipment.It is a must to obey all the notes and warnings marked on the equipment or contained in this manual, otherwise injury or fatality may occur. -
Page 48: Self-Diagnosis Function
4. Check and fasten the I/O ports at the control interface board, including the connection between control board and control interface board, as well as between the temperature/humidity sensor board and the interface board. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 49: Air Cooled Condenser
90%(EU4 standard).To ensure the normal operation of the filter, the filter service alarm logic is provided by the controller. The default fan running time is 2000 hours, when the time is exceeded, the filter Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 50: Infrared Humidifier
3. If the cable is not in action, you should remove the electric heater to check whether the manual reset switch is disconnected, the automatic reset switch or the electric heater pipe is damaged. Figure 6-2 PTC electric reheat Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 51: Chapter 7 Troubleshooting
Chapter 7 Troubleshooting Chapter 7 Troubleshooting This chapter introduces the troubleshooting of Liebert.PEX+ AC, mainly including the troubleshooting and fault handling of fan, infrared humidifier, compressor and cooling system, and heating system, and the simple troubleshooting and faults handling that can be performed by users. Please contact Emerson for complex troubleshooting and fault handling. -
Page 52: Heating System Troubleshooting
Power failure of heater When the heating contactor is closed, check if the L1, L2 closed, no and L3 voltages of contactor are normal heating effect Heater burnout Cut off the power to checkthe heater Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 53: Appendix 1 Circuit Diagram
Appendix 1 Circuit Diagram Appendix 1 Circuit Diagram Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 55: Appendix 2 Menu Structure Of Pacc Controller (Standard Configuration)
Resistor wau valve TEMP Advanced Fan pressure time for liquid 2 weight Air supply/air BP valve discharge 1 TEMP Delay time for liquid BP valve supply/discha LP switch -rge2 TEMP detect delay time Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 57: Appendix 3 Alarm Control Menu Table
Water Detected NTC1 Fault NTC2 Fault NTC3 Fault Repetitive Address Slave Loss Master Loss Fan hours exceeded C1 hours exceeded C2 hours exceeded Heater 1 Service Heater 2 Service HUM Service Interval Interval Interval Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 58: Appendix 4 Hazardous Substances Or Elements Announcement
Environment Protection Period starting from the manufacturing date. Applicable product: Liebert.PEX+ series precision air conditioner Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 59: Appendix 5 Monthly Routine Inspection Items
Check eroding condition of components Check if water pan drainage is clogged Infrared humidifier Check the lamp of humidifier Check water pan for mineral deposits Signature_________________________________________________________ Note: Please duplicate this table for archiving. Liebert. PEX+Series Precision Air Conditioner User Manual... -
Page 60: Appendix 6 Routine Inspection Items (Half A Year)
Check if water pan drainage is clogged Check the lamp of humidifier Infrared humidifier Check water pan for mineral deposits Check and fix connectors Electric control part Check and fix connectors Signature_________________________________________________________ Note: Please duplicate this table for archiving. Liebert. PEX+Series Precision Air Conditioner User Manual...