Vertiv Liebert DM Series User Manual
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Vertiv Liebert DM Series User Manual

Vertiv Liebert DM Series User Manual

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Liebert® DM
Precision Air Conditioning
User Manual

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Summary of Contents for Vertiv Liebert DM Series

  • Page 1 Liebert® DM Precision Air Conditioning User Manual...
  • Page 2 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.
  • Page 3 Please read this manual carefully before installing, maintaining, and troubleshooting. Vertiv™ Liebert® DM precision CRAC is a professional device, only professionals are permitted to access the unit and is kept in a place where access is restricted to common people.
  • Page 4 Safety Precautions and Measures The important safety precautions and measures that should be followed during the installation and maintenance are described in the following sections. Read the manual prior to installation and operation of the unit. Only qualified personnel should move, install, or service this equipment.
  • Page 5 Therefore, care should be taken to ensure that the unit is not located directly above any equipment that could sustain damage due to water and excessive moisture. Use of a leak detection system for the unit and system supply lines are recommended by Vertiv Co.

  • Page 6: Table Of Contents

    1.6.1. Operating Environment Requirements ...........................13 1.6.2. Storage Environment Requirements ............................14 1.7. Refrigerant Charging Requirement .................................14 Chapter 2: Mechanical Installation................................15 2.1. Unpacking and Inspection ....................................15 2.2. Installation Notes ........................................15 2.3. System Installation Arrangement ................................15 Vertiv™ | Liebert® DM | User Manual...
  • Page 7 2.8.2. Adding Refrigerant For Long Piping System .........................42 2.8.3. Long Connecting Pipe System with Lubricant Oil (RL32-3MAF) ............. 43 2.9. Installation Inspection .......................................44 Chapter 3: Electrical Installation ...................................45 3.1. Task Introduction ........................................45 3.1.1. Cables to Connect On-site ................................. 45 Vertiv™ | Liebert® DM | User Manual...
  • Page 8 5.3. Control Interface ........................................66 5.3.1. Color Screen Main Interface ................................66 5.3.2. Password Screen ...................................... 70 5.4. Menu Structure .......................................... 71 5.4.1. Main Menu ..........................................71 5.4.2. Run Information ......................................72 5.4.3. Temp/Hum Setting ....................................73 Vertiv™ | Liebert® DM | User Manual...
  • Page 9 7.2.8. High-Pressure Switch and Low-Pressure Switch .......................97 7.2.9. Compressor ........................................97 7.3. Outdoor Unit Maintenance ....................................99 7.3.1. Refrigeration System ....................................99 7.3.2. Air-Cooled Condenser ..................................99 7.4. Monthly Routine Maintenance................................100 7.5. Routine Maintenance and Inspection (Semi-annually) ....................101 Vertiv™ | Liebert® DM | User Manual...
  • Page 10 Appendix IV: Parameter Setting Tables .....................117 Appendix V: Routine Maintenance Inspection Items (Monthly) ................................120 Appendix VI: Routine Maintenance Inspection Items (Semi-annually)..............................121 Appendix VII: Table Names and Content of Harmful Substances in Products ..........................122 Vertiv™ | Liebert® DM | User Manual...

  • Page 11: Chapter 1: Overview

    1.1.1. Indoor unit Liebert DM series air conditioner with 07 kW/12 kW/17 kW/22 kW/27 kW cooling capacity used in 400 V (±10%) three-phase power supply distribution. DME07 Upflow Model...

  • Page 12: Outdoor Unit

    Figure 1-2 Liebert® DM Indoor Unit (22 kW and 27 kW) 1.1.2. Outdoor unit The outdoor unit is an air-cooled type. DMC07WA1 DMC12WA1 DMC17WA1 Figure 1-3 Liebert® DM Outdoor Unit (07 kW, 12 kW and 17 kW) Vertiv™ | Liebert® DM | User Manual...
  • Page 13 Overview DMC22/27MA1 Figure 1-4 Liebert® DM Outdoor Unit (22 kW and 27 kW) A water-cooled condenser option is available on request, contact Vertiv representative for more details. Vertiv™ | Liebert® DM | User Manual...

  • Page 14: Model Description

    • The specification options represented in nomenclature such as Cooling system, Fan and Air discharge are only applicable to the Indoor unit. • Power supply of 400 V, 3 Ph, 60 Hz is available on request, contact vertiv representative for details. • There is no Cooling Only option for 07 kW and 12 kW models.

  • Page 15: Basic Performance Parameters

    • Compressor The Liebert DM unit consists of a compressor with high efficiency ratio. It has features such as low vibration, low noise and high reliability, refer Figure 1-5 for better understanding. Vertiv™ | Liebert® DM | User Manual...
  • Page 16 Figure 1-5 Scroll Compressor • Centrifugal Fan A highly efficient and reliable centrifugal fan is provided in Vertiv™ Liebert® DM unit, that can handle large airflow. It also has features such as long throw, direct driven, and easily maintainable. Figure 1-6 Centrifugal Fan...
  • Page 17 • Microprocessor Figure 1-7 Microprocessor Controller Screen Vertiv™ Liebert® DM air conditioning unit is configured with 7-inch HMI color screen. The user-friendly interface operation is simple. The multi-level password protection feature can effectively prevent unauthorized operation. It also provides self recovery on power failure;...
  • Page 18 The Liebert® DM unit is equipped with a nylon air filter rated for 90% filtration efficiency at 10-micron particle size. The air filter has features such as compact structure, reusable, and easy maintenance. A standard G4 filter option is available on request, contact Vertiv representative for more details. Vertiv™ | Liebert® DM | User Manual...

  • Page 19: Outdoor Unit

    Overview 1.4.2. Outdoor Unit Vertiv™ Liebert® DM outdoor unit consists of condenser coil, fan, and fan speed controller. • Condenser Coil The unit is equipped with an uniquely designed finned-tube heat exchanger (condenser) with wavy fin on the surface, which facilitate high heat transfer rate.

  • Page 20: Optional Components

    Inlet pipe Outlet joint Figure 1-12 Infrared Humidifier • The humidifier is installed and tested in the factory. • The Liebert® DM can control the ambient humidity only if a humidifier is installed. Vertiv™ | Liebert® DM | User Manual...

  • Page 21: Electrical Heating

    1.5.2. Electrical Heating Vertiv™ Liebert® DM series uses a ceramic heater with Positive Temperature Co-efficient (PTC) which is highly reliable and safe. A temperature sensor is provided on the surface of the heater that signals to cut off the power of the heater when the surface temperature is too high.

  • Page 22: Energy-Saving Card

    1.5.5. Energy-saving Card Vertiv™ Liebert® DM can monitor the maximum room temperature with the energy-saving card. The card is located outside the unit cabinet such that it can accurately measure high heat load and temperature of the unit. Up to four cards can be configured in the unit.

  • Page 23: Environmental Conditions Requirements

    4. If you need to operate the service valve (outdoor) below -20 °C ambient temperature, then consult Vertiv representative for guidance. 5. The power supply of 380 V to 415 V, 3 Ph, 60 Hz option is available on request, contact Vertiv representative for details.

  • Page 24: Storage Environment Requirements

    Do not use sub-standard quality inferior refrigerant as it may cause extensive damage to the system. Vertiv does not undertake any responsibility for all the related consequences that are resulted from using a low quality inferior refrigerant.

  • Page 25: Chapter 2: Mechanical Installation

    Check that the fittings are complete and the components are intact against the packing list. If any parts are found missing or damaged, report immediately to the local office of the carrier and Vertiv representative. Do not accept a damaged unit The air conditioning unit is factory charged with 0.2 MPa (2 bar) of nitrogen.
  • Page 26 Solenoid valve Ball valve Filter dryer Check valve Sight glass Ball valve Thermal Expansion Valve (TXV) Condenser coil Evaporator coil Ball valve Suction Temperature Sensor Ball valve Suction line Figure 2-1 System Arrangement Diagram Vertiv | Liebert® DM | User Manual...

  • Page 27: System Installation Mode

    : Represents the link between Suction Temperature Sensor and Thermal Expansion Valve (TXV) • The single system is used as an example. • Components (marked with *) are not supplied by Vertiv but are recommended for the proper circuit operation and maintenance. • Components (marked with ) is only available for Vertiv™...
  • Page 28 Figure 2-3, when the outdoor unit is installed at a lower level than the indoor unit. Vertiv | Liebert® DM | User Manual...

  • Page 29: Mechanical Installation

    DME07M**UA1 (Upflow Unit) DME12M**UA1 (Upflow Unit) DME17M*0UA1 (Upflow Unit) Figure 2-4 Vertiv™ Liebert® DM Indoor Unit (07 kW, 12 kW and 17 kW) DME22M*0UA1 (Upflow Unit) DME27M*1UA1 (Upflow Unit) Figure 2-5 Vertiv™ Liebert® DM Upflow Indoor Unit (22 kW and 27 kW)
  • Page 30 Mechanical Installation DME22M*0FA*1 (Downflow Unit) DME27M*1FA1 (Downflow Unit) Figure 2-6 Vertiv™ Liebert® DM Downflow Indoor Unit (22 kW and 27 kW) Table 2-1 Mechanical Parameters of Indoor Unit Operational Dimensions (W × D × H) Model Weight (kg) inch DME07M**UA1 510x385x1850 20.08x15.16x72.83...

  • Page 31: Dimension And Weight Of The Outdoor Unit

    DMC17WA1 Figure 2-7 Dimension of Standard Outdoor Unit (07 kW, 12 kW and 17 kW) DMC22MA1/DMC27MA1 Vertical Installation DMC22MA1/DMC27MA1 Horizontal Installation Figure 2-8 Dimension of Standard Outdoor Unit (22 kW and 27 kW) Vertiv | Liebert® DM | User Manual...

  • Page 32: Installing Indoor Unit

    It is an industry best practice to keep the infiltration of the outdoor air below 5% of the total indoor airflow. Apply appropriate thermal insulation and antifreeze measures for outdoor water pipes to avoid poor drainage and insufficient water supply caused by freezing. Vertiv | Liebert® DM | User Manual...

  • Page 33: Installation Space Requirements

    • Vertiv recommends that the site preparation is defined as per the requirements. However, if these requirements are not met, Vertiv recommends that rectifications to be made on the site in order to comply with the specified requirements and conditions.

  • Page 34: Installation Procedure

    Waffle pad or anti-vibration (8mm to 10 mm thickness) 3 Steel plate (60x60x4) Angle iron (30x30x3) or square tube Fixing hole for expansion bolt (M6x50) (25x25x3) Figure 2-10 Indoor Unit Mounting Hole Position and Base Size (unit: mm) Vertiv | Liebert® DM | User Manual...

  • Page 35: Installing Outdoor Unit

    • Prepare a strong solid base capable of supporting the outdoor unit weight (see Table 2-2). The base should be at least 50 mm higher than the installation floor and 50 mm more than the dimensions of the outdoor unit base, as shown Figure 2-14. Vertiv | Liebert® DM | User Manual...

  • Page 36: Installation Procedure

    The hole dimension of the base for vertical and horizontal installations are given Table 2-4 Description Slot hole (4-10x12) Figure 2-12 Hole Dimension of Outdoor Unit Base (Vertical Installation) Description Slot hole (8-10x16) Figure 2-13 Hole Dimension of Outdoor Unit Base (Horizontal Installation) Vertiv | Liebert® DM | User Manual...
  • Page 37 � 450 mm Description Description Outdoor unit Base Bracket Outdoor unit base Figure 2-14 Vertical Installation of Multiple Outdoor Units with One above the Other Vertiv | Liebert® DM | User Manual...
  • Page 38 Figure 2-16. • In vertical installation arrangement, ensure to maintain minimum vertical distance of 450 mm between two outdoor units. 5# angle b*b*d(mm): 50*50*5 6.5# h*b*d(mm): 65*40*4.3 Figure 2-16 Angle and Channel for Brackets Vertiv | Liebert® DM | User Manual...

  • Page 39: Refrigeration Piping Connection General Principles

    4. If the equivalent length exceeds 30 m, or the vertical height difference between the indoor and the outdoor units exceeds the values given in Table 2-6, consult Vertiv representative for technical support in installation design phase. 5. The equivalent lengths of the components are shown in Table 2-7.

  • Page 40: Quick Thread Connector Installation Notes

    • Refrigerant piping between the indoor and the outdoor units (discharge and liquid piping). • Drain piping connections of the indoor unit. In case of Humidifier is configured with the unit: The water supply piping to the humidifier connection is required. Vertiv | Liebert® DM | User Manual...

  • Page 41: Connecting Refrigerant Piping

    Table 2-10 for the pipe sizes. In case of longer pipe is required contact Vertiv representative. • Select the appropriate dimension (Pipe diameter & Wall thickness) of refrigerant liquid pipes connecting the outdoor unit to ensure that the pressure drop of the refrigerant liquid through the pipe during unit operation does not exceed 40 kPa (5 psi to 6psi).
  • Page 42 • The pipe lengths marked with ‘*’ require a Long piping kit to be added in their equivalent length. • D: Discharge line, L: Liquid pipe. • If the pipe length exceeds 50 m, please consult Vertiv local representative for details. • Copper pipe with outer diameter of 9.5 mm, then wall thickness requirement ≥0.8 mm.

  • Page 43: Pipe Connector Position

    Condensate water drain pipe (OD 22 mm) Connector 5/8”-18UNF thread) Humidifier water supply pipe 1/4” copper nut Discharge pipe (Straight pipe 1/2”-12.7 mm 1/4”-1/2” Connector thread Connector 3/4”-16UNF thread) Figure 2-18 Pipeline Connector Interface (DME07) Vertiv | Liebert® DM | User Manual...
  • Page 44 Condensate water drain pipe (OD 22 mm) Connector 3/4”-16UNF thread) Humidifier water supply pipe 1/4” copper nut Discharge pipe (Straight pipe 5/8”-16 mm 1/4”-1/2” Connector thread Connector 7/8”-14UNF thread) Figure 2-19 Pipeline Connector Interface (DME12) Vertiv | Liebert® DM | User Manual...
  • Page 45 Humidifier water supply pipe 1/4” copper nut Connector 3/4”-16UNF thread) 1/4”-1/2” Connector thread Discharge pipe (Straight pipe 5/8”-16 mm Condensate water drain pipe (OD 22 mm) Connector 7/8”-14UNF thread) Figure 2-20 Pipeline Connector Interface (DME17) Vertiv | Liebert® DM | User Manual...
  • Page 46 Discharge line shut off service angle valve 16 mm straight pipe, 7/8”- 14 UNF Connector (3/4”-19 mm straight pipe, 1-1/16”- 14 UNF thread) Connector thread) Figure 2-21 Pipeline Connector Interface (DME22 and DME27 Upflow Unit) Vertiv | Liebert® DM | User Manual...
  • Page 47 Horizontal sections of the discharge pipe should be sloped down from the compressor with a slope of at least 1:200 (5 mm down for each 1 m run). The discharge pipes should be insulated where they are routed in the conditioned space (including under a raised floor). Vertiv | Liebert® DM | User Manual...
  • Page 48 Liquid line shut off service angle valve (1/2”- 16 mm straight pipe, 7/8”- 14 UNF Connector 12.7 mm straight pipe, (3/4”-16UNF Connector thread) thread) Figure 2-24 Refrigerant Pipe Connectors of Outdoor Unit (DMC17) Vertiv | Liebert® DM | User Manual...

  • Page 49: Connecting Drain Piping Of Indoor Unit

    • The drain pipe of the indoor unit equipped with a humidifier must be able to endure the 90 ºC water temperature. • Use galvanized steel pipe, aluminum-plastic composite pipe with hot water type or PP-R polypropylene plastic pipe with hot water type as the drain pipe Vertiv | Liebert® DM | User Manual...

  • Page 50: Humidifier And Water Supply Piping Connection (If Applicable)

    • Remove the “U“ type fixing plates after installation, and then restore the bolts and washers in reverse sequence of the assembly process. • The fastening torque of the bolts is (12±1) Nm. Vertiv | Liebert® DM | User Manual...

  • Page 51: Charging Refrigerant

    DME07 DME12 DME17 DME22 DME22 DME27 DME27 Unit Model (Upflow) (Upflow) (Upflow) (Upflow) (Downflow) (Upflow) (Downflow) +DMC07 +DMC12 +DMC17 +DMC22 +DMC22 +DMC27 +DMC27 Base charge (kg) - Standard pipe length within 10 m Vertiv | Liebert® DM | User Manual...

  • Page 52: Adding Refrigerant For Long Piping System

    Total length of extended liquid pipe (m) = Total length of liquid pipe - 5 m (for 07 kW/12 kW/17 kW) Total length of extended liquid pipe (m) = Total length of liquid pipe - 7.5 m (for 22 kW/27 kW) Vertiv | Liebert® DM | User Manual...

  • Page 53: Long Connecting Pipe System With Lubricant Oil (Rl32-3Maf)

    Table 2-13. • A certain type of POE lubricant that is directly supplied by Vertiv must be used, otherwise the compressor may be damaged. When charging the refrigeration system with oil, consult Vertiv representative for more details on adding the lubricant oil.

  • Page 54: Installation Inspection

    The airflow distribution system has been installed in each room (e.g. raised floor/ grill, duct, etc.). The upflow unit must have plenum or have air duct connection, and the fan and heater shall not be accessible after installation (if applicable). Vertiv | Liebert® DM | User Manual...

  • Page 55: Chapter 3: Electrical Installation

    Chapter 3: Electrical Installation In this chapter, the electrical installation of the Vertiv™ Liebert® DM unit is explained in-depth to help users with the various activities, which include work introduction and installation notes, connecting power cables of the indoor and outdoor units, connecting the control cables, connecting energy-saving card, and the installation inspection.

  • Page 56: Indoor Unit Power Cable Connection

    Electrical Heater and Humidifier DM07 15.2 DM12 21.5 DM17 28.0 DM22 35.9 DM27 36.5 Electrical heater and humidifier are the optional components, which can be available on request, contact Vertiv representative for more details. Vertiv™ | Liebert® DM | User Manual...
  • Page 57 Power output terminal N line terminal Cable clamp A line terminal Cable hole B line terminal Outdoor terminal C line terminal PE terminal Figure 3-1 Power Connection of Outdoor Unit (7 kW and 12 kW) Vertiv™ | Liebert® DM | User Manual...
  • Page 58 Description Power output terminal C line terminal Cable clamp Outdoor terminal Cable hole N line terminal A line terminal PE terminal B line terminal Figure 3-2 Power Connection of Outdoor Unit (17 kW) Vertiv™ | Liebert® DM | User Manual...
  • Page 59 Power input terminal Outdoor unit switch Figure 3-3 Indoor Unit Power Cabling Diagram (22 kW/ 27 kW) Cut off the power supply to the unit prior to the maintenance, because the unit contains high voltage. Vertiv™ | Liebert® DM | User Manual...

  • Page 60: Connecting Power Cable Of Outdoor Unit

    Figure 3-4, Figure 3-5, and Figure 3-6. Description Description Cable hole in cover Wire clamp Cable hole Cable hole in unit Power input terminal Figure 3-4 Power Connection of Outdoor Unit (07 kW/12 kW) Vertiv™ | Liebert® DM | User Manual...
  • Page 61 Power input terminal Figure 3-5 Power Connection of Outdoor Unit (17 kW) Description Description Cable hole Power input terminal Fan speed controller Cable clip Figure 3-6 Power Connection of Outdoor Unit (22 kW/27 kW) Vertiv™ | Liebert® DM | User Manual...

  • Page 62: Control Cable Connections

    Control terminal on the PCB Figure 3-7 Power Connection of Outdoor Unit (07 kW/12 kW) DM 07 kW/12 kW (the interface of the energy-saving card and the RDU-A/SIC cable are fixed in the electrical control box. Vertiv™ | Liebert® DM | User Manual...
  • Page 63 Control terminal on the PCB Figure 3-8 Power Connection of Outdoor Unit (17 kW) DM 17 kW (the interface of the energy-saving card and the RDU-A/SIC cable are fixed in the electrical control box. Vertiv™ | Liebert® DM | User Manual...
  • Page 64 Energy-saving card Control terminal RDU-A/SIC Energy-saving card Control terminal on the PCB RDU-A/SIC Control terminal on the terminal block Control terminal on the terminal block Figure 3-9 Control Terminal Position (22 kW/27 kW) Vertiv™ | Liebert® DM | User Manual...
  • Page 65 J13 single broad power input J39 display data cable J28 output of electrical heater and so on J12 SIC power J19 input of remote On/Off and so on J14 monitoring Figure 3-10 Control Terminal Arrangement on PCB Vertiv™ | Liebert® DM | User Manual...
  • Page 66 ON/OFF status and to stop the unit operation upon special moment. If the inputs of remote On/Off terminals are shorted and the unit power supply is switched On, then unit outputs are normal. Vertiv™ | Liebert® DM | User Manual...
  • Page 67 • The system will generate an audible alarm and LCD screen on micro-processing controller will display the corresponding alarm information. If a computer using Vertiv host monitoring software is connected, the alarm will be displayed on it too.

  • Page 68: The Outdoor Unit Signal Cable Connection (For 22 Kw/27 Kw)

    The RS485 monitoring interface of the Liebert® DM indoor unit is located on the J14 terminal on the printed circuit board as shown in Figure 3-10. The monitoring interface is shown in Figure 3-9. The twisted-pair communication cable is used to connect to the host computer. Vertiv™ | Liebert® DM | User Manual...

  • Page 69: Energy-Saving Card Connection

    Multiple Liebert DM air conditioners can be simultaneously monitored through the Vertiv RDU-A/SIC monitoring. Figure 3-14 shows the networking of the two Liebert DM units monitored through the Vertiv RDU-A/SIC monitoring. Figure 3-14 Monitoring the Networking of Two Liebert DM Units 3.5.4.

  • Page 70: Notes On Installing And Using The Energy-Saving Card

    The sleep mode can be activated only when the number of energy-saving cards is not zero. Only the Liebert DM unit with more than one energy-saving card can enter sleep mode. For the system with the main and backup units, the main and backup units cannot share the energy-saving card. Vertiv™ | Liebert® DM | User Manual...

  • Page 71: Electrical Installation Inspection

    All the cables and connector connections, including the fixing blocks are firm and appropriately fixed. After confirming the preceding points, user can replace the electrical plate and start start-up inspection & functional testing. Vertiv™ | Liebert® DM | User Manual...

  • Page 72: Chapter 4: Start-Up Commissioning

    After inspecting and confirming the above particulates, go ahead with commissioning procedure. Prior to powering on the indoor unit, ensure that the outdoor unit power and signal cables are connected and the outdoor unit MCB is closed. Vertiv | Liebert® DM | User Manual...

  • Page 73: Function Testing

    After at least 3 minutes of cooling, adjust the temperature setpoint to 5 °C (10 °F) higher than the indoor temperature. If the compressor stops working, it means that the cooling function is normal. Refer Section 5.4.3 (Temp/Hum) for better understanding. Vertiv | Liebert® DM | User Manual...

  • Page 74: Heating

    ‘Forced Cooling Mode’ and the dehumidification demand will not be responded. Refer Section 5.4.3 (Temp/Hum) for better understanding. Restore the humidity setpoint to the default or the original value after the test. Vertiv | Liebert® DM | User Manual...

  • Page 75: Chapter 5: Microprocessor Controller

    10. Configured with a serial RS485 communications protocol for monitoring purpose, it meets all securities norms. 5.2. Appearance The micro-processing controller panel is shown in Figure 5-1. Figure 5-1 Appearance of Color Screen Vertiv | Liebert® DM | User Manual...

  • Page 76: Control Interface

    5-2, the sensor data or alarm data is displayed. Click the toggle button 2 to switch between the sensor data and the alarm data. The unit provides the alarm self-diagnosis function. Click the alarm data to display the possible causes and treatment measures of the listed alarms. Vertiv | Liebert® DM | User Manual...
  • Page 77 Click this button to enter the graph interface to view the return air temperature graph Graph button and the return air humidity graph. Date and Time Show current date and time. display Vertiv | Liebert® DM | User Manual...
  • Page 78 Figure 5-3 Control Mode Diagram Vertiv | Liebert® DM | User Manual...
  • Page 79 Table 5-4 Description of Unit Status Colors Status Description of System Status The power-on status sensor data is not in the normal range or is invalid. Gray Power- off state Green The power-on status is within the normal range Vertiv | Liebert® DM | User Manual...

  • Page 80: Password Screen

    On entering a wrong password, user can only able to see main screen. In this case, user can press the ESC button to enter the Password screen again. If user does not enter any password or enter wrong password, user can only view the menu settings but cannot change any parameters. Vertiv | Liebert® DM | User Manual...

  • Page 81: Menu Structure

    Temperature and View return air temperature graph, return air humidity graph. humidity graph View the controller software and hardware version number, the software About and hardware version number of the display screen. Vertiv | Liebert® DM | User Manual...

  • Page 82: Run Information

    • Temperature and humidity information The temperature and humidity information menu displays the return air temperature and humidity information of the device in real time, as shown in Figure 5-8. Figure 5-8 Temperature and Humidity Information Vertiv | Liebert® DM | User Manual...

  • Page 83: Temp/Hum Setting

    Select the Temperature and Humidity setting in the main menu to access the interface as shown in Figure 5-11, including temperature settings and humidity settings. Under this menu, the user can set the value of the return air temperature and humidity, temperature and humidity ratio band. Vertiv | Liebert® DM | User Manual...

  • Page 84: Alarm Information

    The Active Alarm menu is used to monitor the current alarm status record of the unit and prompt specific alarm status information. The specific alarm status information includes sequence number, start date and time and alarm content, as shown in Figure 5-12. Figure 5-12 Active Alarm Menu Vertiv | Liebert® DM | User Manual...

  • Page 85: Parameter Settings

    Select Parameter Settings from the main menu to enter the interface as shown in Figure 5-14, including teamwork control settings, alarm parameters, alarm properties, communication settings, time settings, password settings and display settings. • Teamwork Settings The Teamwork Setting menu interface is shown in Figure 5-14. Vertiv | Liebert® DM | User Manual...
  • Page 86 Section 3.5. • Alarm Setpoint Figure 5-15 shows the Alarm Setpoint menu interface. The temperature and humidity alarm value can be set in the alarm parameter menu. Figure 5-15 Alarm Setpoint Vertiv | Liebert® DM | User Manual...
  • Page 87 Table 5-7 Alarm Output Logic Set Value Alarm History Alarm Status record Alarm Sound Alarm Prompt Enabled Ceases Disabled • Communication Setting The Communication Setting menu interface is shown in Figure 5-17. Vertiv | Liebert® DM | User Manual...
  • Page 88 5-18. The time settings menu enables to set in the time and date of the unit. Figure 5-18 Time Setting • Password Setting The Password Setting menu interface is shown in Figure 5-19. Change the password settings for permanent memory saving. Vertiv | Liebert® DM | User Manual...
  • Page 89 Figure 5-19 Password Setting • Display Setting The Display Setting menu interface is shown in Figure 5-20. The display language (Chinese or English) can be selected in the display setting menu. Figure 5-20 Display Setting Vertiv | Liebert® DM | User Manual...

  • Page 90: Temperature And Humidity Graph

    Figure 5-22. • Version Information The Version Information menu interface is shown in Figure 5-22. The software and hardware version number can be queried in the version information menu. Figure 5-22 Version Information Vertiv | Liebert® DM | User Manual...
  • Page 91 • Unit Abnormality Help Figure 5-23 shows the unit exception abnormality menu interface. In the Unit Abnormality Help menu, user can query the unit fault cause analysis and solutions. Figure 5-23 Device Abnormality Help Vertiv | Liebert® DM | User Manual...

  • Page 92: Chapter 6: Outdoor Fan Speed Controller (Only For 22 Kw/27 Kw)

    3-2. The distribution is shown in Figure 6-1, and refer Table 6-1 for details. For the specific wiring method of the wiring terminal, please refer to Appendix 2 Outdoor unit circuit diagram. Figure 6-1 Distribution of Terminals Vertiv | Liebert® DM | User Manual...
  • Page 93 • Pin 2: 19 V AC signal return. Compressor status detection J6 (CompSta) terminal J8 (SCRTemp) in Figure 6-1 is the unit interface on the fan speed controller board, not open to users. Vertiv | Liebert® DM | User Manual...

  • Page 94: Human-Machine Interface

    The modifiable configuration data includes start-up pressure, minimum voltage, Modify configuration pressure control range, maximum voltage, number of fans, pressure sensor type, parameters in real time or restore the above parameters to default values. Vertiv | Liebert® DM | User Manual...

  • Page 95: Human-Machine Interface Operation Instructions

    “88.8”. The display sequence is shown in Figure 6-3 (“16.1” in the figure is an example data, and the specific value depends on the sampling result). 16.1 16.1 Figure 6-3 Power-on Initial Interface Vertiv | Liebert® DM | User Manual...

  • Page 96: Main Menu Interface

    The maximum pressure between the pressure 1 and pressure 2; Sensor fault: 88.8 F02: Pressure 1 Pressure 2 Ambient Temperature SCR Temperature Output percentage Figure 6-5 Analog Main Menu Interface • Active alarm value main menu interface Vertiv | Liebert® DM | User Manual...
  • Page 97 Input phase loss alarm SCR over temperature Fan 1 over temperature Fan 2 over temperature Pressure sensor failure EEPROM read failure SCR temperture sensor failure Frequency anomaly Figure 6-7 Historical Alarm Value Main Menu Vertiv | Liebert® DM | User Manual...
  • Page 98 Pressure control range Pband C03: Minimum voltage Vmin C04: Minimum voltage Vmax C05: Number of fans C06: Pressure sensor type C07: Refrigerant type C99: Restore the parameters to default values Figure 6-8 Configuration Value Main Menu Vertiv | Liebert® DM | User Manual...

  • Page 99: Chapter 7: System Operation And Maintenance

    • All circuit boards are not hot-pluggable. Big instant current will be produced when the board is plugged or unplugged with powering on and it may lead to unrepairable damage to the circuit. • All control boards can only be maintained after the micro-processing controller is powered off. Vertiv | Liebert® DM | User Manual...

  • Page 100: Indoor Unit Maintenance

    Figure 7-1, Figure 7-2, and Figure 7-3. Description Description Fixing screw (2pcs) Side panel Stator Guide rail Filter (front) Fixing screw (2pcs) Filter (left & right) Stator (2pcs) Figure 7-1 Fliter Location (07 kW/12 kW) Vertiv | Liebert® DM | User Manual...
  • Page 101 System Operation and Maintenance Description Description Fixing screw (2pcs) Filter (front) Stator Figure 7-2 Filter Location (17 kW) Vertiv | Liebert® DM | User Manual...
  • Page 102 (Amplified View of 'J') (Amplified View of 'D') Upflow Unit Downflow Unit Description Description Filter Screw Filter (top, left, right) Stator Fixing Screw (2pcs) Filter (2pcs) Stator Figure 7-3 Filter Location (22 kW/27 kW) Vertiv | Liebert® DM | User Manual...

  • Page 103: Fan

    Figure 7-4 Figure show the location of the electrical heater; if the heater needs to be replaced, please contact the Vertiv representative for maintenance support. The electrical heater cable must be routed through the thimble socket, then connected to the heater.

  • Page 104: Infrared Humidifier

    Before exercising the corresponding operation, ensure that the power supply has been switched off. Ensure that the water in the water pan is close to room temperature before draining it to avoid personal injury. Vertiv | Liebert® DM | User Manual...

  • Page 105: Power Spd (Optional)

    SPD. DM 07 kW/12 kW Upflow Unit DM 17 kW Upflow Unit Description Description Power SPD Power SPD Figure 7-7 Power SPD Location (07 kW, 12 kW, and 17 kW) Vertiv | Liebert® DM | User Manual...
  • Page 106 If any one of the following phenomena appears, the power SPD has failed and it needs to be replaced immediately: 1. Any indicator of the power SPD turns red. 2. The customer alarm 2 is registered, refer Section 3.5.1, Connecting Control Terminal in SPD (custom 2 terminal). Vertiv | Liebert® DM | User Manual...

  • Page 107: Thermal Expansion Valve (Txv)

    Avoid touching or contacting the residual gas and oils in compressor with exposed skin. Wear long rubber gloves to handle contaminated components. Vertiv | Liebert® DM | User Manual...
  • Page 108 Add some refrigerant if necessary. Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be recycled in accordance with state and local regulations. Vertiv | Liebert® DM | User Manual...

  • Page 109: Outdoor Unit Maintenance

    • Check all refrigerant pipes and capillaries for vibration and support them if necessary. • Carefully inspect all refrigerant piping for signs of oil leakage, determine the leakage position and fix them immediately. Vertiv | Liebert® DM | User Manual...

  • Page 110: Monthly Routine Maintenance

    Check if refrigerant piping is reliably supported. Check system circulation and moisture content (observed through Refrigerant system sight glass). Check Thermal Expansion Valve (TXV) is firmly connected. Vertiv | Liebert® DM | User Manual...

  • Page 111: Routine Maintenance And Inspection (Semi-Annually)

    Check if the refrigerant piping are properly supported. Check all electrical connections are firmly tightened. Electrical board Check the surface of the circuit board for signs of corrosion. Electrical heater Check heating element for signs of corrosion or burning. Vertiv | Liebert® DM | User Manual...

  • Page 112: Chapter 8: Troubleshooting

    Use suction and discharge pressure gauge to check if Low refrigerant charge pressure is as per requirement. Also, see if there are any evidents of bubbles exist in the sight glass. Vertiv | Liebert® DM | User Manual...
  • Page 113 The screen display is normal, the Contact Vertiv representative for maintenance support or button does not The display board setting is faulty engineering assistance. respond, the device is running normally Low power supply voltage Check for power supply voltage.
  • Page 114 High humidity alarm Vapor barrier is not done in the Check for the vapor barrier. room Check if the water supply is normal. Contact Vertiv Humidifier does not work representative for maintenance support or engineering assistance. Low humidity alarm Setpoint is unreasonable Reset the setpoint.
  • Page 115 Remove the obstruction at the return air outlet of the unit, Airflow loss alarm Return air volume is small clean the return air filter or contact Vertiv representative for maintenance support or engineering assistance. Return air temperature sensor...
  • Page 116 User Needs to Check Particulars or Processing Method Check if the condensing pressure sensor cabling is Pressure sensor Pressure sensor failure firmly connected or contact Vertiv representative for failure maintenance support or engineering assistance. The number of normal online energy-saving cards is less than the...
  • Page 117 Pressure sensor failure Pressure sensor failure Compare after replacing the pressure sensor. Fan speed controller board hardware Compare after replacing the fan speed failure controller board. Vertiv | Liebert® DM | User Manual...
  • Page 118 Fan speed controller board hardware Compare after replacing the fan speed failure controller board. Grid voltage frequency error, Frequency Compare after replacing the fan speed Fan speed controller board hardware abnormal controller board. failure Vertiv | Liebert® DM | User Manual...

  • Page 119: Appendix I: Circuit Diagram Of Indoor Unit

    Appendix I: Circuit Diagram of Indoor Unit DME07MHSUP1 Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 120 DME07MH1UP1 Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 121 DME12MHSUP1 Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 122 DME12MH1UP1 Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 123 DME 17 kW Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 124 DME 22 kW/27 kW Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 125: Appendix Ii: Circuit Diagram Of Outdoor Unit

    Appendix II: Circuit Diagram of Outdoor Unit DMC 22 kW & 27 kW Circuit Diagram The Circuit Diagram will be Updated Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 126: Appendix Iii: Menu Structure Of Controller

    Rtn Low Return Units Fail SW Frequency Quantity Alarm SP Standby Standby Request Quantity Customer Rotation 1 Switch Quantity Customer Rotation 2 Switch Cycle Parameter Customer sharing 3 Switch Manual Rotation Rotate At Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 127: Appendix Iv: Parameter Setting Tables

    Number of rotations running units or number of standby units)) Rotating cycle (days) Rotating time 12:00 0: 00 to 23: 00 Manual rotation 0: No; 1: Yes Parameter sharing 0: No; 1: Yes Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 128 0: None; 1: Floor overflow 2: SPD; 3: Customer 3 configuration Remote power on/off; 4: Electrical heating failure; 5: Air loss switch Customer 1 polarity 0: NC 1: NO Customer 2 polarity 0: NC 1: NO Vertiv™ | Liebert® DM | Appendix Manual...
  • Page 129 -40 ºC to 100 ºC Temp.°C Energy saving card 2 -40 ºC to 100 ºC Temp.°C Energy saving card 3 -40 ºC to 100 ºC Temp.°C Energy saving card 4 -40 ºC to 100 ºC Temp.°C Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 130: Appendix V: Routine Maintenance Inspection Items (Monthly)

    Check if refrigerant piping is reliably supported Check system circulation and moisture content (observed through sight Refrigerant system glass) Check Thermal Expansion Valve (TXV) is firmly connected Signature_________________________________________________________ Note: Please copy this table for record keeping purposes. Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 131: Appendix Vi: Routine Maintenance Inspection Items (Semi-Annually)

    Electrical board Check the surface of the circuit board for signs of corrosion Electrical heater Check heating element for signs of corrosion or burning Signature_________________________________________________________ Note: Please copy this table for record keeping purposes. Vertiv™ | Liebert® DM | Appendix Manual...

  • Page 132: Appendix Vii: Table Names And Content Of Harmful Substances In Products

    Reasons for lead contained in the above parts: Vertiv is committed to the design and manufacture of environment-friendly products. We will continue to reduce and eliminate toxic and hazardous substances in our products through continuous research. The following part or applications contain toxic or hazardous substances that are limited to the current state of the art and cannot be reliably replaced or have no mature solutions.
  • Page 133 SJ/T11363-2006. Reasons for lead contained in the above parts: Vertiv is committed to the design and manufacture of environment-friendly products. We will continue to reduce and eliminate toxic and hazardous substances in our products through continuous research. The following parts or applications contain toxic or hazardous substances that are limited to the current state of the art and cannot be reliably replaced or have no mature solutions.
  • Page 134 Vertiv.com © 2021 Vertiv Group Corp. All rights reserved. Vertiv™ and the Vertiv logo are trademarks or registered trademarks of Vertiv Group Corp. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness here, Vertiv Group Corp.

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