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Summary of Contents for Liebert DM Series
- Page 1 Precision Cooling For Business-Critical Continuity ™ Liebert DM Series Air Conditioner ® User Manual...
- Page 2 New Liebert_DM Series Air Conditioner User Manual Version V1.0 Revision date April 28, 2013 31012860 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.
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Page 4: Table Of Contents
Contents Chapter 1 Overview ................................1 1.1 Model Description ..............................1 1.2 Product Introduction .............................. 1 1.3 Basic Performance Parameters ..........................1 1.4 Main Components ..............................2 1.4.1 Indoor Unit ..............................2 1.4.2 Outdoor Unit .............................. 2 1.5 Options ................................. 3 1.5.1 Humidifier .............................. - Page 5 2.6.6 Connecting Humidifier Water Supply Pipe (If Applicable) ................ 14 2.7 Removing Transportation Fastener And Vibration Absorber ................15 2.8 Adding Refrigerant For Long Pipe System ......................15 2.9 Check List ................................16 Chapter 3 Electrical Installation ............................17 3.1 Task Introduction ..............................17 3.2 Notes ..................................
- Page 6 5.6.7 Display Set .............................. 34 Chapter 6 System Maintenance ............................35 6.1 Electric Inspection ............................... 35 6.2 Indoor Unit Maintenance ............................. 35 6.2.1 Filter................................. 35 6.2.2 Fan ................................36 6.2.3 Drain Pipe ..............................37 6.2.4 Heater ..............................37 6.2.5 Humidifier ..............................37 6.2.6 Power SPD ..............................
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Page 8: Chapter 1 Overview
Chapter 1 Overview Chapter 1 Overview This chapter introduces the model description, product introduction, basic performance parameters, main components, options and ambient requirement, and refrigerant charging requirement of the new Liebert_DM series air conditioner (Liebert_DM AC for short). 1.1 Model Description The model description of the Liebert_DM AC is shown in Figure 1-1. -
Page 9: Main Components
Chapter 1 Overview Nominal refrigeration Energy efficiency Heating capacity Humidification Model Power（kW） capacity (kW) rate (kW) capacity (kg/h) Note: [1]: The heating capacity is only for the models with heating function; [2]: The humidification capacity is only for the models with humidification function 1.4 Main Components 1.4.1 Indoor Unit The indoor unit consists of evaporator, compressor, fan, micro-processing controller, thermal expansion valve,... -
Page 10: Options
Chapter 1 Overview Low-temperature unit Make the AC unit operate in cooling mode normally at the lowest outdoor temperature of -34°C. 1.5 Options 1.5.1 Humidifier The humidifier can add pure water vapor (up to 2.5 kg/hour) into the room to control the indoor humidity within ranges required by devices and computer. -
Page 11: Storage Environment
Chapter 1 Overview Table 1-2 Operation environment requirements Item Requirements The maximum equivalent horizontal distance between the indoor unit and outdoor unit : 50m; Installation position : -5m ≤ ΔH ≤ 20m Vertical distance ΔH Indoor unit: vertical mode, mounting base ≥ 150mm; Installation mode outdoor unit: horizontal airflow mode Indoor: 0°C ~ 40°C... -
Page 12: Chapter 2 Mechanical Installation
Chapter 2 Mechanical Installation Chapter 2 Mechanical Installation This chapter expounds the mechanical installation of the Liebert_DM AC, including unpacking & inspection, installation notes, system installation arrangement, installing indoor unit, installing outdoor unit, piping, removing transportation fastener and vibration absorber, adding refrigerant for long pipe system and check list. 2.1 Unpacking And Inspection Move the product to the place most close to the final installation site and then unpack it. -
Page 13: System Installation Illustration
Chapter 2 Mechanical Installation Note : Factory piping. : Field piping (by technicians). 3. *: Check valve and traps are optional and not supplied by Emerson. But they are recommended for normal system operation and easy maintenance. They should be installed on site by technicians. 4. -
Page 14: Mechanical Parameters
Chapter 2 Mechanical Installation 2.3.3 Mechanical Parameters Indoor unit The mechanical parameters of the indoor unit are shown in Figure 2-3 and Table 2-2. 1850 1750 DME07kW DME12kW Figure 2-3 Dimensions of indoor unit (unit: mm) The shadows in Figure 2-3 indicate a reasonable installation and service space. The two sides of the unit need air inlet. -
Page 15: Installing Indoor Unit
Chapter 2 Mechanical Installation Figure 2-5 Dimensions of Lee-Temp outdoor unit (unit: mm) Table 2-2 Mechanical parameters of indoor unit and outdoor unit Model Cooling capacity (kW) Dimensions (W × D × H, mm) Net weight (kg) 510 × 385 × 1750 Indoor unit 12.5 600 ×... -
Page 16: Installation Procedure
Chapter 2 Mechanical Installation 4. Avoid locating multiple indoor units close to each other. This can result in crossing air patterns, uneven loads and competing operation. 5. Do not install additional devices (such as smoke detectors) over the cabinet for facilitating routine maintenance. Figure 2-6 indicates the installation location of the indoor unit. -
Page 17: Installing Outdoor Unit
Chapter 2 Mechanical Installation The grilles can be rotated following the arrow direction Grill Figure 2-8 Regulating airflow direction 2.5 Installing Outdoor Unit 2.5.1 Installation Notes 1. Install the outdoor unit in a place which is secure and easy for maintenance. Do not install it on ground-level sites with public access and be away from residential areas. -
Page 18: Piping For Ac Unit
Chapter 2 Mechanical Installation 1037 Figure 2-10 Installation hole dimensions of Lee-Temp outdoor unit base (top view, unit: mm) If multiple outdoor units need to be installed with one above the other, see Figure 2-11 to install them. 0.5m Out- door unit Airflow... -
Page 19: Installation Notes Of Connector
Chapter 2 Mechanical Installation 5. The equivalent length of each part is given in Table 2-4. The resistance loss caused by elbows and valves has been taken into consideration. The installer should confirm if these values are appropriate for site conditions. Table 2-4 Equivalent length of each part Equivalent length (m) Liquid pipe OD (inch) - Page 20 Chapter 2 Mechanical Installation 4. If jointing mode is needed, all refrigerant piping should be connected with silver-brazed joints. 5. Check piping supports, leakage testing, dehydration of refrigerant pipes and evacuation before using. Use vibration isolating support to isolate the refrigeration pipes from the building. 6.
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Page 21: Connecting Drain Pipe Of Indoor Unit
Chapter 2 Mechanical Installation Connecting discharge pipe Connect one end of the discharge pipe to the discharge pipe connector of the indoor unit shown in Figure 2-12, and the other end to the discharge pipe connector of the outdoor unit shown in Figure 2-13. ... -
Page 22: Removing Transportation Fastener And Vibration Absorber
Chapter 2 Mechanical Installation The unit provides the humidifier with a 3/4” water supply pipe connector fitting. The rated water supply pressure range is 100kPa ~ 700kPa. A shut-off valve should be installed on this pipe outside the unit to isolate the humidifier upon maintenance. 橡胶密封圈... -
Page 23: Check List
Chapter 2 Mechanical Installation Total length of extended liquid pipe (m) = total length of liquid pipe (m) - 5m Table 2-6 Adding refrigerant amount per meter of liquid pipes with different ODs Liquid pipe OD (inch) Adding refrigerant amount per meter (kg/m) 0.060 0.112 0.181... -
Page 24: Chapter 3 Electrical Installation
Chapter 3 Electrical Installation Chapter 3 Electrical Installation This chapter introduces the electrical installation of the Liebert_DM AC, including task introduction, notes, connecting power cables of indoor unit and outdoor unit, connecting control cables, connecting energy-saving card and check list. 3.1 Task Introduction Electrical connections to be made at the installation site are: 1. - Page 25 Chapter 3 Electrical Installation Power output terminal Figure 3-1 Power connection position of indoor unit Lead the power cable through the cabling hole, connect it to the power output terminal of the indoor unit, and fasten it with a cable clamp, as shown in Figure 3-2. Connect the other end to the AC power outside the AC system. Amplified figure of power output terminal Outdoor terminal...
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Page 26: Connecting Power Cable Of Outdoor Unit
Chapter 3 Electrical Installation 3.4 Connecting Power Cable Of Outdoor Unit The standard length of the outdoor unit power cable is 8m, if you need a longer cable, please contact Emerson or purchase it on your own. The recommended cable size is not less than 18AWG (0.75mm Connect one end of the outdoor unit power cable to the power output terminal of the indoor unit shown in Figure 3-2, and the other end to the power connection terminals of the outdoor unit shown in Figure 3-3 and Figure 3-4. - Page 27 Chapter 3 Electrical Installation Control terminals on the terminal block Control terminals on the PCB Figure 3-5 Control terminal position The control terminals on the PCB are shown in Figure 3-6; the control terminals on the terminal block are shown in Figure 3-7.
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Page 28: Connecting Monitoring Port Cable
Chapter 3 Electrical Installation SPD (Customer 1 terminal) When the PIN1 and PIN2 of the customer 1 terminal (control terminal) J19 are not connected to SPD signal, they can connect with an alarm signal except for the AC system. Any outer alarm signal with NO dry contact can be connected with the customer terminal. - Page 29 Chapter 3 Electrical Installation COMM Front Plate DIP switch Interface DME07MC1A2 Figure 3-10 Energy-saving card Use 4-core shielded cables with a recommended cable diameter not less than 20AWG (0.52mm ) to connect the energy-saving card. Make sure that the two ends of the shielded layer and the energy-saving card are grounded reliably to increase the anti-interference ability.
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Page 30: Check List
Chapter 3 Electrical Installation Energy-saving card 0 DataMate3000 (short J8.1 and J8.2) control board Figure 3-12 Connection of single card Energy-saving Energy-saving Energy-saving Energy-saving DataMate3000 card 0 (short card 1 (short card 2 (short card 3 (short control board J8.2 and J8.3) J8.2 and J8.3) J8.2 and J8.3) J8.1 and J8.2) -
Page 31: Chapter 4 System Testing
Chapter 4 System Testing Chapter 4 System Testing This chapter introduces the start-up inspection and function testing of the Liebert_DM AC. 4.1 Start-Up Inspection Before system starting-up, inspect the states of parts following the requirements listed in Table 4-1. Table 4-1 Inspection items before starting-up Item Inspection requirements Panel... -
Page 32: Humidifying
Chapter 4 System Testing setpoint to 5°C (10°F) lower than the indoor temperature. If the heater stops working, it means that the heating function is normal. Note Restore the temperature setpoint to the default or the original value after the test. 4.2.3 Humidifying Adjust the humidity setpoint according to 5.6.3 Set Points to 10% higher than the indoor relative humidity. -
Page 33: Chapter 5 Micro-Processing Controller
Chapter 5 Micro-Processing Controller Chapter 5 Micro-Processing Controller This chapter gives a detailed description on feature, appearance, LCD screen, control buttons, control interface and menu structure of the Liebert_DM AC. 5.1 Feature The micro-processing controller has the following features: 1. Adopt menu operation. It can monitor and display the operation status of precise cooling AC unit to keep the environment within a setting range. -
Page 34: Control Buttons
Chapter 5 Micro-Processing Controller More detailed operating status of certain component and alarm information are available from the Main Menu screen. The selected menu item will be highlighted while browsing. The digit to be changed will be highlighted while you are changing setting. -
Page 35: Control Screen
Chapter 5 Micro-Processing Controller Note After changing the parameter, if you do not press the Enter button to validate the changed parameter, the change will be invalid. 5.5 Control Screen 5.5.1 ON Screen After the AC unit is powered on, the LCD screen will display the ON screen, as shown in Figure 5-4. Connecting Please wait... -
Page 36: Menu Structure
Chapter 5 Micro-Processing Controller Note If pressing the Enter button in the Password screen instead of inputting any password, you can only view the menu settings but cannot change any parameters. 5.6 Menu Structure 5.6.1 Main Menu Input the password in the Password screen and confirm, and the Main Menu screen will appear, as shown in Figure 5-7. - Page 37 Chapter 5 Micro-Processing Controller Active: Hi Temp 2012/01/01 00:00 Figure 5-9 Active Alarm screen Note 1. The latest alarm SN is the biggest number. Press the Up or Down button to scroll through the alarm status records if more than one alarm is activated.
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Page 38: Set Points
Chapter 5 Micro-Processing Controller Table 5-4 Alarm output logic Settings Alarm history record Alarm status record Audible alarm Alarm prompt ENAB DISA Note The alarms Hi Press, Lo Press and Hi Temp are serious fault alarms. So they cannot be set to OFF, but can only be set to ENAB and DISA. -
Page 39: System Menu
Chapter 5 Micro-Processing Controller If the change is successful, the current time and date will be changed to the set time automatically. Otherwise, the current time and date will not be changed. Date (Y) 2012 Time (M) Date (M) Time (S) Date (D) Time (H) Figure 5-15 Time/Date screen... - Page 40 Chapter 5 Micro-Processing Controller <Setup System> <Outdoor Unit> <Select Options> <Change Password> Figure 5-19 System Menu screen Setup System The Setup System settings will not be lost when the power fails. The menu screen is shown in Figure 5-20. For detailed setting ranges, refer to Appendix 2 Parameter Setting Table.
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Page 41: Help Menu
Chapter 5 Micro-Processing Controller Note 1. Only when the energy-saving card No. is not zero, the Sleep Mod can start. Only the Liebert_DM AC equipped with more than one energy-saving card (dedicated) can enter the Sleep Mod. The lead unit and standby unit cannot use the same card. 2. -
Page 42: Chapter 6 System Maintenance
Chapter 6 System Maintenance Chapter 6 System Maintenance This chapter expounds the system maintenance of the Liebert_DM AC, including electric inspection, indoor unit maintenance, outdoor unit maintenance and maintenance inspection checklist. Note 1. Switch off the circuit breaker and cut off the unit power before maintenance unless the power is necessary for the commissioning item. -
Page 43: Fan
Chapter 6 System Maintenance Stator Fixing screw (2 pcs) A amplified Filter Front door Figure 6-1 Taking out the filter on the front door Filter on the side panel Unscrew (not remove) the fixing screws on the filter stator, move the stator along the guide rail, and then take out the filter on the side panel, as shown in Figure 6-2. -
Page 44: Drain Pipe
Chapter 6 System Maintenance 6.2.3 Drain Pipe Inspect water pan periodically for normal operation of the drain pipe. Ensure that no foreign matter or leakage exits in the drain pipe. 6.2.4 Heater If the optional heater is used, it should be maintained periodically. Ensure that no dust or foreign matter collects on its surface, the heater is fixed reliably and the cable connection is reliable. - Page 45 Chapter 6 System Maintenance Current detecting Relay control Figure 6-4 Interface of humidification control board As a consumable, the humidifier does not need regular cleaning. Because the sediment exists in the water drained from the humidifier, the humidifier tray should be cleaned periodically to avoid clogging the tray and the draining pipe. The cleaning cycle varies with the water quality and humidification operation time.
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Page 46: Power Spd
Chapter 6 System Maintenance 3. Connect the power cable correctly. 4. Restore the humidity setpoint to the original setting. 6.2.6 Power SPD Power SPD The position of the power SPD is shown in Figure 6-6. Power SPD Figure 6-6 Power SPD position The power SPD has four status indicators, as shown in Figure 6-7. -
Page 47: High-Pressure Switch And Low-Pressure Switch
Chapter 6 System Maintenance 6.2.8 High-Pressure Switch And Low-Pressure Switch The discharge pressure and suction pressure will vary greatly with the AC unit load and ambient conditions (refer to Table 6-1) during normal operation. When the discharge pressure rises to the high-pressure setpoint, the high-pressure switch will activate and the control system will shut down the compressor after ensuring an abnormal input signal of the high-pressure switch. -
Page 48: Outdoor Unit Maintenance
Chapter 6 System Maintenance 6. Install replacement compressor and make all connections. Do pressurization and leakage tests to the system at approximately 150psig (1034kPa). 7. Evacuate the system twice to 1500 microns and the third time to 500 microns. Break the vacuum each time with clean and dry refrigerant to 2psig (13.8kPa). -
Page 49: Maintenance Inspection Checklist
Chapter 6 System Maintenance 6.4 Maintenance Inspection Checklist Note Regular inspections are necessary to ensure proper operation of the AC unit. Table 6-3 Maintenance inspection checklist Liebert_DM AC Date: Prepared by: Model: Serial Number: Type Maintenance components Item Result Check for restricted airflow Filter Check the filter... -
Page 50: Chapter 7 Troubleshooting
Chapter 7 Troubleshooting Chapter 7 Troubleshooting This chapter expounds the troubleshooting of the Liebert_DM AC. See Table 7-1 for the troubleshooting of the Liebert_DM AC. Table 7-1 Troubleshooting Fault phenomenon Possible cause Check or remedy No power to unit Check unit input voltage Circuit breaker that controls voltage (at Locate short circuit and reset circuit breaker the transformer) is open... -
Page 51: Appendix 1 Menu Structure
Appendix 1 Menu Structure Appendix 1 Menu Structure Main Menu System Status System Menu Help Menu Display Set Alarm Menu Set Points MntPrtcl Ret Temp Ret Hum Temp Stpt Analog Unit Addr Contrast Version Info NTC0Temp Temp Sens Buad Rate Time/Date Enable Language... -
Page 52: Appendix 2 Parameter Setting Table
Appendix 2 Parameter Setting Table Appendix 2 Parameter Setting Table Menu Parameter Default Setting range Hi Temp 35°C 25°C ~ 50°C Lo Temp 15°C 5°C ~ 20°C Hi Hum 65%RH 65%RH ~ 90%RH Lo Hum 35%RH 10%RH ~ 35%RH Air loss 25°C 30°C Alarm output... - Page 53 Appendix 2 Parameter Setting Table Menu Parameter Default Setting range Select EngySave Cd Num 0 ~ 4 Options_CostSave Sleep At 27°C 15°C ~ 40°C Mod_Sleep Mod System Unit Status SIG, HST, Standby Menu Select Switch Mod Standby Standby, Rotate Options_Standby Rt Time 1d ~ 7d Rt At...
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Page 54: Appendix 3 Rdu-Cooling Air-Conditioner Single-Unit Manager Software Introduction
Appendix 3 RDU-Cooling Air-Conditioner Single-Unit Manager Software Introduction Appendix 3 RDU-Cooling Air-Conditioner Single-Unit Manager Software Introduction The RDU-Cooling manager is a monitoring system developed by Emerson Network Power Co., Ltd. (Emerson for short) to perform monitoring and management over the Liebert_DM air conditioner (Liebert_DM AC for short) designed by Emerson. - Page 55 Appendix 3 RDU-Cooling Air-Conditioner Single-Unit Manager Software Introduction Click Alarm Sound (ON) to turn on the alarm sound, and Alarm Sound (ON) turns to Alarm Sound (OFF). Functions of the RDU-Cooling manager include: Simple HMI (human-machine interface): The RDU-Cooling manager supports simple HMI function. You can change the site background picture and drag the site or equipment to change its icon location at will.
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