Vertiv Liebert CR012 User Manual
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Vertiv Liebert CR012 User Manual

Precision air conditioning
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Summary of Contents for Vertiv Liebert CR012

  • Page 1 ® Liebert CR012 Precision Air Conditioning User Manual...
  • Page 2 Vertiv Tech Co., Ltd. ⚫ China Website: www.vertiv.com E-mail: support@Vertiv.com Customer service hotline: 4008876510 ⚫ Asia Pacific Homepage: www.vertiv.com E-mail: overseas.support@Vertiv.com For Technical Support, users may contact the nearest Vertiv Tech Co., Ltd. local sales office or service center.
  • Page 3 Purpose of the Document This document applies to the Liebert CR012 precision air conditioners and cooling solutions which maintain an optimal environmental control mainly for testing laboratories, data center rooms and similar technological systems at minimal operating costs. The figures used in this document are for reference only.

  • Page 4: Table Of Contents

    Table of Contents Chapter 1 Introduction ................................. 1 1.1 Model Nomenclature ............................. 1 1.2 Basic Performance Parameters ..........................2 1.3 Product Description ............................... 2 1.4 Main Components of Indoor Unit .......................... 3 1.4.1 DC Brushless Compressor ........................3 1.4.2 Fan ................................4 1.4.3 Evaporator ..............................
  • Page 5 2.5.2 Preparations for Startup........................... 31 2.5.3 Startup Inspection ............................ 31 Chapter 3 Micro-Controller ..............................34 3.1 Micro-Controller ..............................34 3.2 Control buttons..............................34 3.3 Common Operational function examples ......................35 3.4 Main Screen ................................ 35 3.5 Password interface ............................. 36 3.6 Menu Structure ..............................

  • Page 6: Chapter 1 Introduction

    Liebert CR012 air conditioners are products that are specifically created and designed for the small to medium data centers, computer rooms, and similar systems which call for a high degree of accuracy and precision. It addresses the needs and challenges associated with such applications and setups.

  • Page 7: Basic Performance Parameters

    Condition: Return air 37˚C, 24% RH & 45˚C condensing temperature. 1.3 Product Description The Liebert CR012 cooling unit is a comprehensive system that includes all the main functions fundamental to precision cooling units such as cooling, dehumidification, re-heating, air filtration, condensation management, temperature and humidity control, alarm functions and compatibility with data communications.

  • Page 8: Main Components Of Indoor Unit

    The following section expounds the list of components used in the Liebert CR012 Precision Air conditioners. 1.4.1 DC Brushless Compressor The Liebert CR012 models comprise of a DC Brushless compressor which has a host of promising features as mentioned in the following list: ⚫...

  • Page 9: Fan

    Figure 1-4 DC Brushless Compressor 1.4.2 Fan The EC Fans used in the Liebert CR012 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 ⚫...

  • Page 10: Electric Heater

    PID regulation technology. ⚫ Multilevel Password protection ⚫ Self-recovery upon power failure and high-voltage & low-voltage protection ⚫ Automatic phase-sequence switching upon the antiphase and rotate speed control of the outdoor fan Liebert CR012 Precision Air Conditioning User Manual...

  • Page 11: Condenser

    The Liebert CR012 is compatible with multiple temperature/humidity sensors based on the requirement. An interesting development is the compatibility with the Liebert CR012 models with the Modbus protocol. Through the configured RS 485 port or TCP/IP port, the CR012 systems can communicate with the host computer in addition to remotely taking charge of the host software.

  • Page 12: Storage Condition

    Another essential aspect is the quality and make of the refrigerant oil. Adding poor quality oil, counterfeit oil, or oil for a different model will damage the system. Please use refrigerant approved by Vertiv Tech Co., Ltd. Low quality or counterfeit refrigerant will severely damage the system. Please use refrigerant approved by Vertv Co.

  • Page 13: Chapter 2 Installation

    One precaution is to choose roads that do not have too many bumps and if any, avoid it as much as possible. ⚫ Liebert CR012 systems are on the heavier side and therefore, it is recommended that equipment like an electric forklift is utilized for these heavy-duty systems.

  • Page 14: Unpacking

    The unit is fixed on the packing pallet with M8*20 and M8*80 screws. Use a 17mm open-end spanner, ratchet spanner, or sleeve to remove the screws. Refer to Figure 2-4 to for the schematic diagram. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 15: Inspection

    2.2.2 Installation Space requirements Liebert CR012 air conditioners are advanced precision air cooling units and therefore, these air conditioners must be installed, preferably in a row of cabinets with high heat density and in a hot aisle and cold aisle arrangement.

  • Page 16: Installation Tools

    Chapter 2 Installation Liebert CR012 air conditioners are advanced precision air cooling units and therefore, these air conditioners must be installed, preferably in a row of cabinets with high heat density and in a hot aisle and cold aisle arrangement.

  • Page 17: Mechanical Installation

    Installation Preparation. The manufacturer’s engineering dimension drawings must be taken as a reference while installing the equipment. 2.3.1 System arrangement during installation The general arrangement of the CR012 air cooled AC unit is depicted in Figure 2-6. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 18: System Installation Mode

    ⚫ Vertiv staff and qualified professionals lay out the piping in the laboratory. ⚫ Piping is done by technicians. Components (marked with *) are not supplied by Vertiv but are recommended for proper circuit operation and maintenance. Additional components (marked with +) are required when the equivalent length exceeds 30m.

  • Page 19: Product Dimensions

    Figure 2-8 The Condenser is lower than the Compressor during installation 2.3.3 Product Dimensions The dimensions and weight of the indoor unit are displayed in Figure 2-9 and in table 2-2. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 20 The following table 2-3 depicts the dimensions of the base plate pipe outlet: Table 2-3 Model CR012 Top plate pipe outlet Locations & Dimensions The locations of the pipe inlets and outlets on the unit top plate are shown in Figure 2-11: Liebert CR012 Precision Air Conditioning User Manual...

  • Page 21: Installation Procedures

    The CR012 air conditioners are used between racks and one side of it is adjacent to the server cabinet. The CR012 air conditioners are targeted for small-and-medium data centers, computer rooms, and similar systems. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 22 Rotate the hexagon bolts on the bottom of the feet clockwise till the feet drops from the cabinet frames. Fixing the cabinet The cabinet provides two holes (diameter: 13.5 mm) respectively on its top, bottom, front, and rear as depicted in Figure 2-14. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 23 Use the M5 countersunk head screws to fix the cabinet connector (L-shaped) in the installation holes of the cabinet frame (side of the hinge) and rack frame adjacent to the cabinet as depicted in Figure 2-16. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 24: Piping

    ⚫ Use the same method to remove the bottom filter. Figure 2-17 depicts the process of removing the filters: Mounting screw GB6560_M5x10 Fixing flake of the filter A amplified Figure 2-17 Removing the Filters Liebert CR012 Precision Air Conditioning User Manual...
  • Page 25 ⚫ Use a Teflon belt between the flexible pipes and connector to avoid water leakage ⚫ Check the water pump inlet pipe and gravity drain pipe should not be raised or higher than the water tray after installation. Figure 2-19 Connection of drainage pipes Liebert CR012 Precision Air Conditioning User Manual...
  • Page 26 2-5. Alternatively, contact the Vertiv support office to seek the help of the technician for gauging the length and diameter.
  • Page 27 0.24 1-1/8 0.56 A trap must be installed every 7.5m of the vertical distance. Please consult Vertiv for such specific inquiry and installation. There is no necessity of cutting the indoor unit pipes while installing the solenoid valve. After the entire system is installed, open the ball valve to keep the pressure and carry out the vacuum operation,...
  • Page 28 Charging Refrigerant and Adding Refrigeration Oil The Liebert CR012 air conditioners come pre-charged in the factory with 2Bar Nitrogen. Table 2-8 indicates the standard charged amount. The users can determine the charging amount of the refrigerant according to the system configuration and the length of the connection pipes between the indoor and outdoor unit.

  • Page 29: Removing Transportation Fastener And Vibration Absorber

    Adjust the installation direction of the supply air baffle to lead wind to the left or right depending on the installation location of the Liebert CR012 air conditioners. The supply air baffle is composed of several pieces. Remove the screws on both sides of the single piece of the supply air baffle, rotate it by 180° . Install it back to change the wind direction.

  • Page 30: Checklist For Completed Mechanical Installation

    The Liebert CR012 air conditioners are professional devices used in industrial, commercial, or other professional occasions. It is not tailored for the general public. The total rating power is larger than 1 kW and is in with the IEC61000-3-12 standard.

  • Page 31: Connecting Cables Of The Indoor Unit

    For the air conditioner configured with EC fans, the unit power grid adheres to the TN or TT star connection power distribution system. However, if there is a need to configure another type of power grid, contact the Vertiv support team for the same.
  • Page 32 19.1 Connecting the Control cables The location of the terminal block for cable connections in the site is depicted in Figure 2-26. The amplified view of the terminals is shown in Figure 2-28. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 33 The standard location of the sensor is 1.5m height. Therefore, the sensors should be placed in positions as depicted in Figure 2-29, or the devices cannot operate appropriately. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 34 Chapter 2 Installation Figure 2-29 Layout of rack sensors Following is the procedure to connect sensors for Liebert CR012 models: Insert the connector of the rack temperature sensor in the TB3 point. On connecting the cable, route the cable through the top or bottom of the unit following which it should be connected to the first sensor. Connect the first sensor to the second sensor.

  • Page 35: Commissioning Overview

    All the wiring and connector connections, including the fixing blocks, are fixed firmly and appropriately. Do not power on or operate the installed unit as Vertiv's authorized professional technicians have to perform a check and confirm whether it is good to go. Starting up and Operating the unit should only commence if the commissioning process is successful, following which Vertiv’s engineers give the go-ahead.

  • Page 36: Preparations For Startup

    1. Open the corresponding circuit breaker of each component of the unit, close the general circuit breaker and the transformer circuit breaker, and check the control voltage; 2. Check the indoor fan: Close the fan circuit breaker; manually set the 75% output to check the fan running current. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 37 Output percentage value of the compressor cannot be adjusted until the compressor has started up for about 5min (i.e., the soft start is over); Liebert CR012 Precision Air Conditioning User Manual...
  • Page 38 Refer to the Refrigerant refill and charging section in the user manual for the calculations. Once the commissioning is completed, the Vertiv engineers will confirm the same using the checklist in Table 2-19. Table 2-19...

  • Page 39: Chapter 3 Micro-Controller

    Move the cursor down or decrease the parameter value. For a toggle selection: scroll through the options. For Down button a multi-screen menu: scroll down the screen Liebert CR012 Precision Air Conditioning User Manual...

  • Page 40: Common Operational Function Examples

    (fan, cooling, heating, dehumidifying, and humidifying) and unit operation status (off, running, standby, and locked). The icons on the main screen indicate the unit output status, unit property, and unit operating status. The icons and their definitions are displayed in table 3-2. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 41: Password Interface

    Appendix 2 Menu Structure Of Micro-Processing Controller which defines the menu structure of the Micro-processing controller. On selecting a menu item, that item will be highlighted. Figure 3-5 depicts the Main Menu screen: Liebert CR012 Precision Air Conditioning User Manual...
  • Page 42 Press the UP or Down button to scroll through the Alarm status records if more than one alarm is activated. The Alarm status records will be automatically cleared when the system is powered off. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 43 Press the UP and Down to scroll through the menu. The Alarm Set settings will not be lost despite a power failure. Changing the default value of the Alarm settings is not recommended. However, if a change is necessary, change the settings under the guidance of trained professionals. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 44 The following alarms are critical fault alarms and hence, cannot be set to OFF. However, they can be set to ENA and DISA. ⚫ Air Lost ⚫ Hi Exh Temp ⚫ Hi Exh Lock ⚫ Lo Exh SH ⚫ Lo Exh Lock ⚫ HP Abnor ⚫ HP Alm ⚫ HP Lock Liebert CR012 Precision Air Conditioning User Manual...
  • Page 45 EEV Alarm Select the EEV Alarm on the Alarm Set screen to access its menu. Press the Up or Down button to scroll through the menus. Figure 3-15 depicts the EEV Alarm menu: Liebert CR012 Precision Air Conditioning User Manual...
  • Page 46 When the same mode is selected for Comp Mode and Fan Mode, the temperature settings are also the same; when different modes are selected, an extra item of Fan ∆T temperature settings plus Fan will appear in the menu, the temperature setting plus Fan ∆T is the target temperature of fan operation. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 47 Figure 3-20. Figure 3-20 Analog Signals Switch Signals After going through the menu, the current input and output states of the devices can be viewed using the Switch Signals utility. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 48 YY is the total number of start and stop records. Figure 3-24 depicts the records of the fan component. Figure 3-24 Fan records Liebert CR012 Precision Air Conditioning User Manual...
  • Page 49 Historical Alarm data will not be cleared. Use the Reset Factory option with caution as it can clear all user settings and shut down the unit. Fan Set The Fan Set screen is depicted in Figure 3-27: Liebert CR012 Precision Air Conditioning User Manual...
  • Page 50 The EEV Set screen is depicted in Figure 3-29. Figure 3-29 EEV Settings Manual Mode The Manual Mode helps set the parameters of certain components while a few settings cannot be altered as they are only read-only attributes. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 51 In Figure 3-32, all the options are functional, except for the Enab 1st Run which cannot be even viewed by the users. Date & Time This facility displays the current date and time of the system in the Year/Month/Date and Hour/Minute/Second format: Figure 3-33 depicts the Date and Time screen: Liebert CR012 Precision Air Conditioning User Manual...

  • Page 52: Teamwork

    The “critical fault alarms” will cause the unit to go into standby. The “secondary fault alarms” will remove the unit from the “running unit” number, but will continue to operate. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 53: Typical Standby Function

    Rotation function is utilized to ensure that all the installed units have an equal run-time. This helps to prolong the life of the installed equipment with an assurance that all the units are working effectively. Figure 3-38 depicts the rotation function. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 54: Wiring Connection

    Rotation Time: 10:00 3.7.4 Wiring connection The Liebert CR012 units can achieve teamwork via CAN bus connection. Connect all units as given in the below diagram; connect each 61 and each 62 terminals with CAN bus cables. Terminal 61 and 62 in TB2 is connected to J20 on the PACC. The Max total distance is 150m.

  • Page 55: Parameter Setting

    M/S Dly: When performing a rotation, after the standby unit has turned on, the operating unit has to wait 2 minutes (default) before turning off. Manu Rotate: During teamwork debugging, each manual rotation will execute a regular rotation with rotation quantity. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 56: Chapter 4 Maintenance & Troubleshooting

    Chapter 4 Maintenance & Troubleshooting This chapter deals with the system operation and maintenance of the Liebert CR012 range of air conditioners. In this chapter, the following points or items will be discussed to help users get to grips with the routine inspections and checks from a user-perspective.

  • Page 57: Routine Maintenance And Inspection (Half -Yearly)

    Disconnect all the fuses and MCBs of the control part during the test as high voltage from the insulation test could damage the components. Check the contactors prior to powering on the unit to ensure that the contactors can hold and un-hold freely. Liebert CR012 Precision Air Conditioning User Manual...
  • Page 58 2 to 2.5 meters away from the unit. Do not place it directly under the machine. Figure 4-1 shows the recommended location for the water leak detector: Figure 4-2 Recommended location for the water leak detector Liebert CR012 Precision Air Conditioning User Manual...

  • Page 59: Air Filter Maintenance

    Check the refrigerant pipes once every 6 months to ensure that there is no wear and tear. 4.9 Drainage system maintenance Inspect the water tray periodically for ensuring normal operation of the drainage pipe. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 60: Troubleshooting

    Troubleshooting of compressor and cooling system Table 4-5 Troubleshooting the Cooling system Symptom Possible Causes Items to be checked or handling method Compressor can’t be Does not power on (Shutdown) Check the main power against under-voltage, over- Liebert CR012 Precision Air Conditioning User Manual...
  • Page 61 Compressor over Too high compression ratio Check that the fans of the evaporator and condenser are temperature normal Too high suction overheat degree Regulate the EEV or add proper amount of refrigerant Liebert CR012 Precision Air Conditioning User Manual...

  • Page 62: Appendix 1 Circuit Diagram

    Wire color code： Ethernet or CAN wiring BK-Black P-Purple Factory supplied 24 volt wiring BL-Blue R-Red Device own line BR-Brown YE-Yellow Inline quick disconnect WH-White GR-Grey Terminal block connector Y/GN-Yellow green Naked crimping connector Liebert CR012 Precision Air Conditioning User Manual...

  • Page 63: Appendix 2 Menu Structure Of Micro-Processing Controller

    Phase C R.T9 Cal Fan4Freq Freq Offset Frequency LP Sen Temp10 Lock R.T10 Cal DIP Switch Water OF Water UF Fan Alm Heat Alm Filt Clog Filt Maint Remote Addr Overlap Loss Master Liebert CR012 Precision Air Conditioning User Manual...

  • Page 64: Appendix 3 Alarm Control Menu Table

    Ret Hum Sensor Alarm Hi HS Temp Hi Exh Lock Air Temp Sensor Alarm Comp OC Lo Exh Lock Sup Temp Sensor Alarm Comp PL Power Lost Rem Temp Sensor Alarm BV Abnor Liebert CR012 Precision Air Conditioning User Manual...

  • Page 65: Appendix 4 Hazardous Substances Or Elements Announcement

    ×: Means the content of the hazardous substances in at least one of the average quality materials of the part is outside the limits specified in SJ/T11363-2006 Vertiv Tech Co., Ltd. has been committed to the design and manufacturing of environment-friendly products. It will reduce and eventually eliminate the harzardous substances in the products through unremitting efforts in research. However, limited by the...

  • Page 66: Appendix 5 Maintenance Table (Monthly)

    ___ 4. Check the moisture content (through the sight glass) ___ 5. Check the electronic expansion valve Heating system ___ 1. Check the re-heater operation ___ 2. Check the erosion situation of the components Signature: _________________________________________________________ Note: copy this table for filing. Liebert CR012 Precision Air Conditioning User Manual...

  • Page 67: Appendix 6 Maintenance Table (Half Yearly)

    ___ 5. Check the voltage regulating function of the rotation speed controller ___ 4. Check the contactor action ___ 6. The temperature switch is set at the required position Signature _________________________________________________________ Note: copy this table for filing. Liebert CR012 Precision Air Conditioning User Manual...

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