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Liebert DM Series Air Conditioner

1. Appendix 1 Menu Structure Appendix 1 Menu Structure Main Menu Alarm Menu Set Points System Status Ret Temp System Menu MntPrtel Help Menu Display Set Ret Hum i Temp Sipi Analog Unit Adar Version Info Contrast Temp Sens H Time Date NTCOTemp Buad Rate Temp Adi _ _ _ Enable Language Hum Stpt In Out Status LLemp Ad OverVolt 1st Run Hum Ad
2. Ca o Front E Plate c DIP switch Interface ve 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 The grounding cable should not exceed 10cm and the cable size should be above 2mm Make sure that all connections are tight Use the energy saving card according to the following steps 1 Open the front plate of the energy saving card plastic shell and take out the energy saving card board along the card slot inside the plastic shell The board is shown in Figure 3 11 TEE TII E EE aos T CANH ot sie nin CANL DIP switch GND E py LLL TE COT DEL ld ma jo mn MN Binn el l J8 2 Ol a 12V Earth terminal Figure 3 11 Energy saving card board 2 Short terminals J8 1 and J8 2 in furthest energy saving card and short terminals J8 2 and J8 3 in other cards 3 Ground the cards reliably 4 Put the energy saving card into the shell along the card slot and replace the front plate 5 Use 4 core shielded cables to connect the Liebert_DM control board on back of the front door of the indoor unit to 12V GND CANH and CANL interf
3. Menu Parameter Default Setting range Hi Temp 35 C 25 C 50 C Lo Temp 15 C 5 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 Alarm output ENAB OFF ENAB DISA Meri Alarm Setpoint general alarm Alarm dd ENAB DISA ENAB serious alarm NC the unit equipped with customers SPD is NC by default NO NC Customer 2 NG NO NC remote shutdown TempStpt 24 C 15 35 C Set Points TempSens 3 1 C 5T Hum Stpt 50 RH 20 RH 80 RH Hum Sens 5 RH 1 RH 10 RH Temp Calib 0 0 C 10 C 10 Analog Hum Calib 0 0 10 10 NTCO Calib 0 0 C 10 C 10 C Manual Run Enab NO YES NO System In Fan Output OFF ON OFF Status Comp Output OFF ON OFF In Out Status Heat Output OFF ON OFF Hum Output OFF ON OFF Low air Output OFF ON OFF Out Fan Output OFF ON OFF Mntr Addr 1 1 254 Mntr Prtcl YDN23 YDN23 MODBUS Baut Rate 19200 1200 19200 Over Press 15 10 30 Under Press 15 10 30 Pwr Freq Devia 3Hz 2Hz 5Hz In Fan Start 10s 10s 600s In Fan Stop 30s 10s 300s Setup System Comp Run 180s 60s 300s Comp Stop 180s 60s 300s Cold St Delay 180s 30s 240s Hum Control RH RH AH Temp Compsen OFF ON OFF System Factory Reset NO YES NO Menu Fan type AC AC EC EC max output 74 50 100 EC dehum output 60 40 90 Min Volt 30 30 50 y Max Volt 100 60 100 9utdoor Unit Press BdWath 5Bar 4Bar 6Bar Start Press 13Bar 11Bar 15Bar Heat 0 0 1 Select Optio
4. If the operation pressure is not established it indicates that the compressor has failed It can be confirmed if the suction pressure and discharge pressure are balanced and the motor does not rotate reversely The controller has powerful alarm and protection functions to ensure safe operation of the compressor The maintenance personnel should record the high pressure and low pressure and find out the cause of an alarm protection during periodical maintenance and inspection cl Note Avoid touching or contacting the residual gas and oils in compressor with exposed skin Wear long rubber gloves to handle contaminated parts Check the following items before replacing the compressor 1 Check that all fuses and circuit breakers are normal 2 Check the working status of the high and low pressure switches 3 Check the relevant historical alarm information 4 Check the historical operation records of the compressor 5 Check the motor electric characteristic cl Note System contains refrigerant Reclaim the refrigerant using standard reclaiming equipment before maintenance Follow the following procedures to remove and replace the failed compressor 1 Cut off the power 2 Attach suction and discharge gauges to compressor access fittings 3 Reclaim the residual refrigerant by using standard reclaiming procedures cl Note Release of refrigerant to the atmosphere is harmful to the environment Refrigerant mus
5. Figure 3 2 Input and output power wiring of indoor unit La Note 1 Use copper cables only and ensure that all connections are solid while wiring 2 Make sure that the power voltage matches the voltage specified on the unit nameplate 3 Install a disconnect switch before the power input of the indoor unit to isolate the unit for maintenance Connect the power cable to the disconnect switch and then to the unit 4 Cut off the power to the unit before maintenance inside the unit because the unit contains high voltage New Liebert DM Series Air Conditioner User Manual Chapter 3 Electrical Installation 19 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 Power cable connection Cable terminal entry hole Cable clip A Aamplified Remove cover Connect cable Install cover Figure 3 3 Power connection figure of standard model outdoor unit Back side of outdoor unit O loolooa 9 p 3 m Power cable L N PE L Cable clip Slot screwdriver 3mm A Power con
6. New Liebert_DM Series Air Conditioner User Manual Chapter 5 Micro Processing Controller 33 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 Figure 5 20 Setup System screen Factory Reset Use Up or Down button to move the cursor to Factory Reset in the Setup System menu and press the Enter button Use Up or Down button to set it to YES or No and press the Enter button to validate the setting If Yes is selected all system setpoints will be restored to the factory recommended values but the operation time and history alarm records will not be cleared En Note Because the Factory Reset will clear all setpoints configured by the user and the AC unit will be turned off be cautious to use it Outdoor Unit The menu screen is shown in Figure 5 21 Figure 5 21 Outdoor Unit menu Select Options The Select Options settings will not be lost when the power fails The menu screen is shown in Figure 5 22 For detailed setting range refer to Appendix 2 Parameter Setting Table Figure 5 22 Select Options screen New Liebert DM Series Air Conditioner User Manual 34 Chapter 5 Micro Processing Controller BA 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
7. Chapter 5 Micro Processing Controller 31 Settings Alarm history record Alarm status record Audible alarm Alarm prompt ENAB Yes Yes Yes Yes DISA Yes Yes No No OFF No No No No M 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 Customer Alarm The AC unit provides two customer alarms including customer 1 and customer 2 corresponding to PIN1 2 of the control terminals J19 and PIN5 6 of J19 respectively The customer alarm can be set to NO or NC You must set them according to the actual alarm signal of the control terminals If the power SPD is selected the customer 1 alarm terminal has been connected with power SPD alarm signal before delivery and the customer 1 has been set to NC 5 6 3 Set Points Select Set Points in Main Menu to enter the Set Points menu as shown in Figure 5 12 The Set Points settings will not be lost when the power fails For detailed setting ranges refer to Appendix 2 Parameter Setting Table Figure 5 12 Set Points menu 5 6 4 System Status Select Main Menu gt System Status to enter the System Status menu as shown in Figure 5 13 Figure 5 13 System Status screen Analog The Analog menu displays the indoor temperature amp humidity 3 ph voltage amp frequency and condenser pressure with a decimal in real time as shown in Figure 5 14 Figure 5
8. The micro processing controller calculates whether the humidification is required according to the temperature and humidity values from the THS If a call for humidification is registered the micro processing controller will send a humidification command to the humidification control board through the spare humidification setting port and humidification output port located on the port board see the connection diagram attached to the AC unit and provide 24V power to it Then the humidification control board will start the humidification operation The humidification control board adopts ON OFF operation mode and it controls the humidification operation according to a programmed procedure The humidification control board is located in a metal box close to the humidifier and its interfaces are shown in Figure 6 4 New Liebert DM Series Air Conditioner User Manual 38 Chapter 6 System Maintenance 2 gt U T o Ke S 5 9 5 2 o E 0 t o gt S o o a gt Zo o E M E of DO O 959 D Oo o S S323 Su 53 A S A O gt gt Zo Os EA O ZOLNO nn 0 0 aus 620 2 8 Ja 00 9 Current TAM detecting s p Relay e J TLR d control e TLR L rreo EE 40 gt uZma x 50 o0O0a a A EIA lO o LL 3 Sg ou 3 o wg EO o tc 20 Oz E 5 9 3 I Figure 6 4 Interfac
9. one energy saving card dedicated can enter the Sleep Mod The lead unit and standby unit cannot use the same card 2 When a lead unit and a standby unit are available you must set one of them as the lead unit If you set both of them as the standby units they cannot work normally accordingly Change Password The Change Password setting will not be lost when the power fails The menu screen is shown in Figure 5 23 Figure 5 23 Change Password screen 5 6 6 Help Menu Select Main Menu gt Help Menu to enter the Help Menu screen as shown in Figure 5 24 The Enab Open is not disclosed to the users Figure 5 24 Help Menu screen Version Info The Version Info menu is used to browse the version as shown in Figure 5 25 Figure 5 25 Version Info screen 5 6 7 Display Set Select Main Menu Display Set to enter the Display Set screen as shown in Figure 5 26 Figure 5 26 Display Set screen New Liebert DM Series Air Conditioner User Manual 6 1 6 2 6 2 1 Chapter 6 System Maintenance 35 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 La Note 1 Switch off the circuit breaker and cut off the unit power before maintenance unless the power is necessary for the commissioning item 2 Even if the indoor unit power is disconnected the i
10. 2 Table 5 2 Password level Password level User Initial password Remark Browse all menu information Only set temperature and Level 1 General operator 0001 humidity setpoints see Figure 5 12 and cannot change any values and settings Level 2 Maintenance personnel Set all parameters Level 3 Factory technician For detailed operation on entering the password refer to 5 4 2 Operation Example If entering a wrong password you can only view the menu but cannot change the settings In this case you can press the Esc button to return to the Normal screen and then press the Enter button to enter the Password screen again New Liebert DM Series Air Conditioner User Manual Chapter 5 Micro Processing Controller 29 La 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 For detailed menu structure refer to Appendix 1 Menu Structure After a certain menu is selected the menu item will be highlighted Some menu items are settable and others are not For detailed setting procedures refer to 5 4 2 Operation Example For the setting ranges of the settable menu items refer to Appendix 2 Parameter Setting Table Set Points Display Set
11. 2 5 Installation NoteS 4 2 2 tetas Hie ates tai 10 2 5 2 Installation Proced re 52 2 e e ubt beate et bett 10 2 6 Pipilig Tor AC Uil 3 5 x oet cte a de cue eu auo dede dete 11 2 61 General Principles ect Eee Een te baie en edo RR Oen 11 2 6 2 Installation Notes Of Connector sssssssssessseseeeeneennee nnne nnne nnne nennt nenne nene nen nennen nnns 12 2 6 3 Required Pipe GConn 6ctions ceo an cc de p rh ct ct edP ei a ep cien 12 2 6 4 Connecting Refrigerant Pipe ssessesssessseeseseeee eene nnne nnns enne nnne nenne renes nnns 12 2 6 5 Connecting Drain Pipe Of Indoor Unit ssssessssseeeeeneeeeeenenenneen nennen nennen rennen 14 2 6 6 Connecting Humidifier Water Supply Pipe If Applicable oooooonncnnnnicinnccnnnccnncccnoncnnnnncnnrna nano crnrcc rancios 14 2 7 Removing Transportation Fastener And Vibration AbSOMDET ooocoonocccononocccononcnonononcno nano nnnnnon cnc nnnn non nano nen nnnnnnnnnnos 15 2 8 Adding Refrigerant For Long Pipe SysSteM oonccccnnccnncccnoncccnoccnoncnonnncnancnnnn cn non cnn nn cn rn cnn nennen nnne nennen enne 15 2 9 Check Listin eee etu uetus iguted 16 Chapter 3 Electrical Installation aci 17 IA Task Introduction trece iore nre e Ro ERE dre eo Peer Ee cete Eva ade E 17 3 2 Notes In eode A a metet mb et reete ptr a 17 3 3 Connecting Power Cable Of Indoor Unit nennen nennen nnn eere e nnne renes 17 3 4 Connecting Powe
12. 4 Installing Indoor Unit 2 4 4 Equipment Room Requirements The equipment room requirements are given as follows 1 The equipment room should be well insulated and have a sealed damp proof layer cl Note The most important elements for maintaining normal environmental control in the conditioned room are damp proof and heat preservation 2 The outdoor air should be kept from entering to a minimum The outside air will add the loads of heating cooling humidifying and dehumidifying of the system It is recommended that the inhalation of outside air be kept below 5 of the total indoor airflow 3 All the doors and windows should be properly sealed to minimize the leakage and the seams should be as narrow as possible 2 4 2 Installation Location Requirements cl Note The Liebert DM AC can generate condensate water Water leakage can cause damage to other precise equipment nearby Do not install the AC units in the vicinity of any precision equipment The installation site must provide drainpipes The installation location requirements are given as follows 1 Try to locate the indoor unit in a capacious floor space to ensure its normal operation 2 Avoid locating the indoor unit in confined areas that affect the airflow pattern shorten cooling cycles and result in down draft and air noise 3 Avoid locating the indoor unit in an alcove or at the extreme end of a long narrow room New Liebert DM Series Air Condit
13. IPX4 Altitude lt 1000m Derating is required when the altitude exceeds 1000m Operation voltage range 380V 15 15 settable according to different environments the error is 3 Note 1 For the equivalent lengths of parts refer to Table 2 4 2 The value is positive if the outdoor unit is installed above the indoor unit negative if the indoor unit is installed above the outdoor unit 1 6 2 Storage Environment The storage environment requirements are listed in Table 1 3 Table 1 3 Storage environment requirements Item Requirements Storage environment Indoor clean without dust Ambient humidity 5 RH 8596 RH Ambient temperature 40 C 70 The total shipment and storage time should not exceed six months Otherwise the Storage time performance needs to be re calibrated 1 7 Refrigerant Charging Requirement The low quality or counterfeit refrigerant will damage the system severely Please use the refrigerant approved by Emerson Network Power Co Ltd For the system abnormity or damage caused by using other brands of refrigerant the warranty will be invalid See Table 1 4 for the refrigerant brands approved by Emerson Network Power Co Ltd Table 1 4 Approved refrigerant brands Brand LOGO Note DU PONT The DU PONT refrigerant adopts Emerson custom made package JUHUA FE New Liebert DM Series Air Conditioner User Manual 2 1 2 2 Chapter 2 Me
14. Manual 16 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 3 8 0 060 1 2 0 112 5 8 0 181 3 4 0 261 7 8 0 362 1 1 8 0 618 2 9 CheckList 1 Proper clearance for service access is maintained around the AC unit 2 The equipment is placed vertically and mounting fasteners are fastened 3 The pipes between the indoor unit and outdoor unit are completed The quick connector valves of the indoor unit and outdoor unit are fully opened 4 Condensate pump is installed if required 5 Drain pipe is connected 6 Water supply pipe is connected to the humidifier if required 7 All pipe connectors are tight 8 After installation foreign materials in and around the equipment are removed such as shipping materials construction materials tools and so on 9 Rotate the fan blades by hand and the fan rotate freely without unusual noise You can start electrical installation after confirming the preceding items New Liebert DM Series Air Conditioner User Manual Chapter 3 Electrical Installation 17 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 an
15. checking and maintenance descriptions Plugged strainer Clean or replace the strainer Low refrigerant charge Use suction and discharge pressure gauge to check the pressure View whether evident bubbles exits through the sight glass High pressure alarm Insufficient airflow across condenser Remove debris from coil surface and air inlet check the control board for the fan speed regulation performance Condenser fan not operating Check that the cable connection from the control board to the terminal block of outdoor unit is tight check that the outdoor unit connections are tight check that the condensate pressure sensor works normally Heater does not operate Heat function disabled in Select Options menu Set Heat to ON refer to Select Options in 5 6 5 System Menu No heat demand output from the control System Adjust temperature setpoint and sensitivity within the required range Elements burned out Turn off the power Check the element resistance with a multimeter Display abnormal Static discharge Disconnect the system power and then restart Loose connection between display board and control board Tighten the connection after powering off and then restart No display control buttons do not respond and equipment operates normally Disconnection between display board and control board Check the connection between display board and control board Display
16. higher than the indoor temperature If the compressor stops working it means that the cooling function is normal AA Note Restore the temperature setpoint to the default or the original value after the test 4 2 2 Heating Adjust the temperature setpoint according to 5 6 3 Set Points to 5 C 10 F higher than the indoor temperature Then the control system should trigger the heating demand and the heater starts to work Adjust the temperature New Liebert_DM Series Air Conditioner User Manual Chapter 4 System Testing 25 setpoint to 5 C 10 F lower than the indoor temperature If the heater stops working it means that the heating function is normal La 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 1096 higher than the indoor relative humidity Then the control system should trigger the humidifying demand and the humidifier starts to work Adjust the humidity setpoint to 10 lower than the indoor relative humidity If the humidifier stops working it means that the humidifying function is normal La Note Restore the humidity setpoint to the default or the original value after the test 4 2 4 Dehumidifying Adjust the humidity setpoint according to 5 6 3 Set Points to 1096 lower than the indoor relative humidity Then the control system should trigger the dehumidification demand and the
17. 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 Use a soft and flexible material to pack around the pipes to protect them from damage caused by going through openings in walls and to reduce vibration transmission 7 When installing the outdoor unit 7 5m higher than the indoor unit a trap should be installed on the discharge pipe This trap will retain refrigerant oil in the off cycle of the compressor When the compressor starts oil in the trap will be carried up the vertical riser and return to the compressor immediately Pipe connector position The pipe connectors inside the indoor unit are shown in Figure 2 12 Liquid pipe straight pipe 3 8 10mm connector 5 8 16mm thread Condensate water drain pipe I D 19mm 5 i Knock out hole 131 NIN pS J A amplified Discharge pipe straight pipe 1 2 12mm connector 3 4 20mm thread o Pipe connectors inside DMEO7kW indoor unit Liquid pipe straight pipe 1 2 12mm connector 3 4 20mm thread x Condensate water drain pipe I D 19mm oy Knock out hole B amplified Discharge pipe straight pipe 5 8 16mm connector 7 8 22mm thread B A Pipe connectors inside DME12kW indoor unit Figure 2 12 Pipe connectors inside the indoor unit New Liebert D
18. satisfy load conditions Its proper operation can be determined by measuring the superheat level The correct superheat setting is 5 6 C to 8 3 C 10 F to 15 F New Liebert DM Series Air Conditioner User Manual 40 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 When the suction pressure is lower than the low pressure setpoint the low pressure switch will activate and the control system will shut down the cooling system after confirming Table 6 1 Typical discharge pressure and suction pressure Item psig MPa Low pressure 57 5 99 8 0 397 0 67 Low pressure setpoint 20 0 138 Low pressure recovery point 36 3 0 25 High pressure 180 275 1 242 1 895 High pressure setpoint 400 2 76 High pressure recovery point 307 2 1 6 2 9 Compressor The compressor fault is generally classified into two types 1 Motor fault such as winding burnout insulation failure short circuit between coils and so on 2 Mechanical fault such as compressing failure relief valve fault therm o disc fault and so on
19. the Up or Down button to select the parameter option After selecting press the Enter button to confirm The parameter will take effect oO ON Oa gt CO Io Press the Esc button to return to the previous menu screen New Liebert DM Series Air Conditioner User Manual 28 5 5 5 5 1 5 5 2 5 5 3 Chapter 5 Micro Processing Controller MA Note After changing the parameter if you do not press the Enter button to validate the changed parameter the change will be invalid Control Screen ON Screen After the AC unit is powered on the LCD screen will display the ON screen as shown in Figure 5 4 Figure 5 4 ON screen Normal Screen After the AC unit is powered on the Normal screen will be displayed after 10 seconds default for heat startup delay or through pressing the Enter button directly as shown in Figure 5 5 The Normal screen displays the following information the current temperature and humidity unit operation state cooling heating dehumidifying humidifying unit mode single lead standby unit operation status running standby locked off sleep alarm information and current date amp time Figure 5 5 Normal screen Password Screen Press the Enter button on the Normal screen and the Password screen will appear as shown in Figure 5 6 Figure 5 6 Password screen Three levels of passwords are provided for accessing the menus The detailed descriptions are listed in Table 5
20. 1 1 4 2 Chapter 1 Overview Nominal refrigeration Power kW Energy efficiency Heating capacity Humidification M oae 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 Main Components Indoor Unit The indoor unit consists of evaporator compressor fan micro processing controller thermal expansion valve strainer filter heater optional humidifier optional and surge protective devices SPD optional For option introduction refer to 1 5 Options Evaporator Adopt a fin tube heat exchanger with high efficiency The distributor is designed and verified according to individual model to ensure that the refrigerant is distributed evenly in each loop improving the efficiency of the heat exchanger to a great extent Compressor Adopt a compressor with high efficiency ratio It features low vibration low noise and high reliability Fan Adopt a centrifugal fan with high efficiency and high reliability It features large airflow long blowing distance direct driving and easy maintenance Micro processing controller Provide a simple operation user interface with multi level password protection self recovery upon power failure high voltage amp low voltage protection phase loss protection automatic phase sequence switching upon anti phase and rota
21. 11 04 26 12 55 09 Device Monitoring 2 Alarm Manage 7 aij Report Manage 8 System Manag amp Online Help 8 9 D 1 Username 2 Logout button 3 Alarm Sound ON OFF 4 System title 5 Number of current alarms 6 System time 7 Menu area 8 Display amp operation area 9 Alarm display area Figure 2 Primary interface of the RDU Cooling manager The primary interface of the RDU Cooling manager consists of three functional areas menu area display amp operation area and alarm display area The menu area displays five menus and all submenus which can be selected by clicking e The display amp operation area displays the operation interface of the selected menu you can query or configure the information of this menu or perform relevant equipment control operations e The alarm display area displays all current alarms click Hide Active Alarm alarm number all current alarms will be hidden and meanwhile Hide Active Alarm alarm number will become Show Active Alarm alarm number If Auto pop up is ticked when a new alarm generates the alarm information will pop up automatically Click the Logout button to log out the current user and return to the login page New Liebert DM Series Air Conditioner User Manual 48 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 Cool
22. 14 Analog screen Time Date The Time Date screen displays the current time and date of the system in the format of Year Month Date and Hour Minute Second as shown in Figure 5 15 New Liebert DM Series Air Conditioner User Manual 32 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 Figure 5 15 Time Date screen In Out Status The In Out Status screen is shown in Figure 5 16 You can browse the current input and output status of the unit on the screen If Manual Run Enab is set to YES the output can be controlled manually If the manual output is inner fan output the rest outputs will be closed if the manual output is electrical heater output the inner fans will be started up simultaneously and the rest outputs will be closed The system will quit the manual mode in an hour if you do not quit Figure 5 16 In Out Status screen Run Time The Run Time screen is shown in Figure 5 17 You can browse the current operation hours of the equipment on the Figure 5 17 Run Time screen Screen Run Records The Run Records screen is shown in Figure 5 18 You can browse the start and stop records of the equipment on the Screen Figure 5 18 Run Records screen 5 6 5 System Menu Select Main Menu gt System Menu to enter the System Menu screen as shown in Figure 5 19
23. 2 5 Table 2 5 Recommended torque value Coupling size Torque value N m 5 8 758 3 4 7 8 25 32 Required Pipe Connections Refer to Figure 2 2 the required pipe connections are as follows e Refrigerant pipe between the indoor unit and the outdoor unit discharge pipe and liquid pipe Drain pipe of the indoor unit The following pipe connection is required if a humidifier is selected Water supply pipe to the humidifier oO Note Before starting up ensure that all pipe connections have been completed without leakage after engineering installation 2 6 4 Connecting Refrigerant Pipe Piping notes 1 The copper pipes provided by the factory are 5m see Table 2 1 If longer pipes are required contact Emerson or your sale agency 2 The liquid pipe is the refrigerant liquid pipe of the outdoor unit outlet So a reasonable pipe diameter and length should be selected for the liquid pipe to ensure that the pressure drop of the refrigerant liquid through the pipe during unit operation does not exceed 40kPa 5psi 6psi 3 The pipe should be installed and removed with care so that they will not get kinked or damaged Use tube benders and make all bends before making connections to either end New Liebert_DM Series Air Conditioner User Manual Chapter 2 Mechanical Installation 13 4 f jointing mode is needed all refrigerant piping should be connected with silver brazed joints 5 Check
24. 5188 New Zealand T 64 3 3392060 F 64 3 3392063 Pakistan T 92 42 36622526 to 28 F 92 42 36622530 Philippines T 63 2 7207400 F 63 2 6203693 Singapore T 65 64672211 F 65 64670130 Thailand T 66 2 6178260 F 66 2 6178277 to 78 Vietnam T 84 4 37628908 F 84 4 37628909 While every precaution has been taken to ensure the accuracy and completeness of this literature Emerson Network Power assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions Emerson Business Critical Continuity and Emerson Network Power are trademarks of Emerson Electric Co or one of its affiliated companies 2013 Emerson Electric Co All rights reserved throughout the world Specifications subject to change without notice Emerson Network Power The global leader in enabling Business Critical Continuity I AC Power Ig Embedded Computing IW Infrastructure Management amp Monitoring I Connectivity M Embedded Power Bi Outside Plant B DC Power B3 Industrial Power Bi Power Switching amp Controls AP13DPG LiebertDM Aircooled UM www EmersonNetworkPower Asia J Precision Cooling I Racks amp Integrated Cabinets I Services
25. 6 3 Set PONS eno eate REDE RERUM ERR EAD ARE ABRE A 31 5 6 4 System Status eee REL t ud Vim 31 5 6 5 SystemiMOnu i e t E REA UR RISO a TERR HEP DUE RM UR RUE RGB 32 5 6 6 Help Menus Rh E ie RR aae eue 34 5 67 Display Sii ad 34 Chapter 6 System AE 35 6 1 Electric Inspection ieu eine gn e ean enema C diel cteress 35 6 2 Indoor Unit Maintenance iin nee end pata ralla alante i ia RE ERE 35 ups n 35 6 2 2 Farizz elise sire ain eine sie n nue ERE d e tp EE re tUe 36 6 2 3 Draim Plpe 3h a ebrei m apetito A aget o 37 0 2 4 Heater e ee uae e I RD REB RR EDAM ERGATMMPEHBERR ANM 37 6 2 5 Humidifier itis a RN 37 6 2 6 POWer SPD xiu ctc n de ore eb f P UD iut he e p Ep asii bn eoe iu 39 6 2 7 Thermal Expansion Valve ede tia 39 6 2 8 High Pressure Switch And Low Pressure Switch ooooconncccnnccninccnncccnoncnnnncnnoncnnonnn ronca ran c nr nennen nennen 40 6 2 9 COMP oe veu albeit E BERI 40 6 3 Qutdoor Unit Maintenance viii cta LIE ecen ee a dada id cb 41 6 3 1 Refrigeration System nione ice cete detenta ai dt taces 41 6 3 2 Air Cooled Condenser naines e EE eden ert dp ie de ee ets 41 6 3 3 Low Temperature Unit Of Lee Temp Outdoor Unit 41 6 4 Maintenance Inspection Checklist eene nnne nennen nnne nnne haies eio nao aiino 42 Chapter 7 Iro bleshootifig icit i ox faves tette ita 43 Appendix T Menu Structures recae iterato uU iia 44 Appen
26. Bi Precision Cooling For Business Critical Continuity Liebert DM Series Air Conditioner User Manual EMERSON Network Power New Liebert_DM Series Air Conditioner User Manual Version v1 0 Revision date April 28 2013 BOM 31012860 Emerson Network Power provides customers with technical support Users may contact the nearest Emerson local sales office or service center Copyright O 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 amp Industry Park Nanshan District 518057 Shenzhen China Homepage www emersonnetworkpower com cn E mail support emersonnetwork com cn Contents Chapter 1 Oven A t REI oe ooh M AL eau i Em Rn a cs 1 1 Model Description isi oe e ee eie temi oat iteene eiie iae 1 1 2 Product Introduction ie eee nd en ER dew des 1 1 9 Basic Perrormance Parameters ec iti cred ertt ER Ye Ede EY e EHE R He LEE aa ce ee Fe EAR E cR cas 1 TA Mairt Gomporlents net eerie et bna gh ma 2 1 4 1 Indoor Unit coccion etm Be elt ede dieere be o pel 2 1 4 2 Outdoor Uhil 2 25 eee REDE RENDER OO RERUM ERE 2 TS OPtlons e ete pe Vote Vett ente 3 We DU El rnldifler s sito ooo tee orte eoe mide Ub ee cite obire ecc te i en IL eateries ey 3 1 5 2 Heater sed e eu e aO RR BRRER REEF INIM CRIME 3 1 5 3 Remote Monitor ii ERREUR e a 3 1 5 4 Energy Sa
27. M Series Air Conditioner User Manual 14 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 oO Note The discharge pipe is the pipe at the compressor discharging side Its horizontal section should be sloped downward away from the compressor with a slope of at least 1 200 5mm down for each 1m run The discharge pipe should be insulated where it is routed in the conditioned space including under a raised floor Discharge pipe DMC12 DML12 straight pipe 5 8 connector 7 8 22mm thread Liquid pipe DMC12 DML12 straight pipe 1 2 connector 3 4 20mm thread a Discharge pipe DMCO7 DMLO7 straight pipe1 2 connector 3 4 20mm thread Liquid pipe DMC0O7 DMLO7 straight pipe3 8 connector 5 8 16mm thread Y vi c B amplified Se Figure 2 13 Refrigerant pipe connectors of outdoor unit Connecting liquid pipe Connect one end of the liquid pipe to the liquid pipe connector of the indoor unit shown in Figure 2 12 and the other end to the liquid pipe connector of the outdoor unit shown in Figure 2 13 2 6 5 Connecting Drain Pipe Of Indoor Unit Connect one end of the drain pipe to the connector of condensate water drain pipe shown in Figure 2 12 The drain pipe o
28. Oi pum za E Kor T J12 display panel power J18 silicon controlled output to contactor andsoon J39 display panel data cable J21 input of high pressure en switch and so on m j J31 Dl input power ESTEE E i ERI ocu Geo J28 output of electrical heater and so on J19 input of remote on off and so on Figure 3 6 Control terminals on the PCB elelele o o g o O O OJO Figure 3 7 Control terminals on the terminal block Remote shutdown The PIN5 and PING of the remote shutdown J19 can be used to remotely control the unit ON OFF status stopping the unit operation upon special moment If the input of remote shutdown terminal is shorted and the AC unit power is switched on the AC unit outputs normally If the terminal is open the AC unit will stop outputting The remote shutdown terminal has been shorted before delivery If the control cable of remote shutdown needs to be connected in site remove the short cable and connect the outer controller to the remote shutdown terminal New Liebert DM Series Air Conditioner User Manual Chapter 3 Electrical Installation 21 SPD Customer 1 terminal When the PIN1 and PIN2 of the customer 1 terminal
29. aces of the energy saving card and snap the accessory magnetic buckle on the shield cable close to the control board end 6 Use 4 core shielded cables to serially connect 12V GND CANH and CANL interfaces of other cards if more than one card is used 7 Ground the shielded cables reliably 8 Set bits 1 and 2 of the DIP switch to card address and other bits to 0 ON 0 OFF 1 9 Fix the energy saving card in position with heavy room temperature load with screws or the card slot on shell 10 Enter Sleep Mod menu to view whether the temperature of the energy saving card is normal Figure 3 12 and Figure 3 13 indicate the connection modes of single card and multi cards respectively New Liebert DM Series Air Conditioner User Manual Chapter 3 Electrical Installation 23 DataMate3000 Energy saving card 0 control board short J8 1 and J8 2 Figure 3 12 Connection of single card Energy saving Energy saving Energy saving Energy saving DataM ee card 0 short card 1 short card 2 short card 3 short Sy J8 2 and J8 3 J8 2 and J8 3 J8 2 and J8 3 J8 1 and J8 2 Figure 3 13 Connection of multi cards 3 7 Check list After the system electrical installation is completed the following requirements should be met 1 No open circuit or short circuit in the electrical connection exists 2 The power voltage is th
30. ameters Indoor unit The mechanical parameters of the indoor unit are shown in Figure 2 3 and Table 2 2 510 CM CZ RA EE ANT a 1850 1750 Y V My x 510 l 4600 DMEO7KW 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 Enough service space must be reserved for the unit to facilitate maintenance The AC unit equipped with a heater should be kept a distance of minimum 150mm from combustible substance When testing the AC unit keep the external static pressure below 150Pa lest the air volume becomes too low and the heater becomes too hot Outdoor unit The mechanical parameters of the outdoor unit are shown in Figure 2 4 Figure 2 5 and Table 2 2 Br 78 gt 1240 829 Figure 2 4 Dimensions of standard outdoor unit unit mm New Liebert_DM Series Air Conditioner User Manual 8 Chapter 2 Mechanical Installation 829 575 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 x D x H mm Net weight kg m 7 5 510 x 385 x 1750 90 12 5 600 x 500 x 1850 145 75 787 x 352 x 829 40 Stangard made 125 787 x 352 x 1240 60 Di AA 75 1037 x 352 x 829 53 12 5 1037 x 352 x 1238 95 2
31. ange silence the audible alarm Move the cursor up or increase the parameter value For a toggle selection scroll through the options For a multi screen menu scroll up the screen Move the cursor down or decrease the parameter value For a toggle selection scroll through the options For a multi screen menu scroll down the screen Esc button ESC Up button Down button 5 4 2 Operation Example Example 1 Inputting password to enter the Main Menu After the unit is started up you can enter the Main Menu through conducting the following operations on the Normal Screen 1 Press the Enter button to enter the Password screen 2 Press the Enter button to highlight the input data field in the Password screen 3 Press the Up or Down button to change the current password number 4 Press the Enter button to confirm the password and enter the Main Menu screen Example 2 changing parameters Taking Hi Temp in Alarm Output screen as an example the procedures are as follows 1 Press the Up or Down button to move the cursor on the Alarm Menu menu in the Main Menu screen Press the Enter button to enter the Alarm Menu menu Press the Up or Down button to move the cursor on Alarm Output in the Alarm Menu screen Press the Enter button to enter the Alarm Output screen Press the Up or Down button to move the cursor on Hi Temp Press the Enter button to highlight the parameter field of Hi Temp Press
32. ar 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 Filter Check for restricted airflow Check the filter Clean the filter Monthly Humidifier if applicable Check humidifier for mineral deposits Check condition of electrodes All hoses and fittings are tight Indoor unit fan Impellers free of debris and move freely Bearings in good condition Power SPD if applicable Check for indicator color Drain system including condensate pump Check and clean out unit drain pipes humidifier and tray condensate pump and building drain pipes Compressor Signs of oil leaks Vibration isolation Refrigerant system Suction pressure Discharge pressure Superheat Evaporator in tight and clean condition Charging capacity of refrigerant Evident temperature difference between before and after the filter drier Semi annually Air cooled condenser Condenser coil is clean Motor mounted tightly Bearing in good condition Refrigerant pipes properly supported Electric board Check electrical connections Check the surface for signs of corrosion Electric heater Check for signs of corrosion Humidifier Check and clean
33. board fault Replace the display board No display control buttons do not respond and equipment has no output Low power voltage Check for power voltage Communication between control board and display board interrupted Check the connection between control board and display board Low pressure alarm Refrigerant leakage Check for leaking place and re charge Outdoor ambient temperature too low Contact local maintenance engineer Outdoor unit fan running at full speed upon low outdoor ambient temperature Check that the cable connections of outdoor unit are normal check that the condensate pressure sensor is normal High temperature alarm High temperature setpoint unreasonable Reset the setpoint Room load exceeding unit design ability Check for room seal or make capacity expansion Low temperature alarm Low temperature setpoint unreasonable Reset the setpoint Heater operation current improper Check for heater working operation High humidity alarm Setpoint unreasonable Reset the setpoint Vapor barrier not done in the room Check for the vapor barrier Low humidity alarm Setpoint unreasonable Reset the setpoint New Liebert DM Series Air Conditioner User Manual 44
34. chanical Installation Chapter 2 Mechanical Installation This chapter expounds the mechanical installation of the Liebert DM AC including unpacking amp 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 Unpacking And Inspection Move the product to the place most close to the final installation site and then unpack it If any part is found missing or damaged please report to your carrier immediately If any covert defect is found please report to the carrier and the local sales office too Do not accept a damaged unit Installation Notes 1 The Liebert DM AC adopts split floor installation The indoor unit must be installed on the floor in the equipment room or computer room The outdoor unit can be installed outdoors or on the floor in other rooms 2 Before installation make sure that the installation environment meets the requirements see 1 6 Ambient Requirements and that the building should be transformed to accommodate the construction work such as piping wiring and ventilation ducts 3 The installers must strictly follow the design drawings for installation and reserve space for installation and maintenance The manufacturer s engineering dimension drawings can serve as a reference 2 3 System Installation Arrangement 2 3 1 General Arrangeme
35. 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 After the outer alarm signal is connected you should set the corresponding customer alarm information in micro processing controller For details refer to Customer Alarm in 5 6 2 Alarm Menu If no alarm signal is connected the input state of the customer terminal is the same as the settings If the outer alarm is generated the input state of the customer terminal is different from the settings The AC system will generate an audible alarm and LCD screen on the micro processing controller will display the corresponding alarm information If a computer using Emerson host monitoring software is connected the alarm will be displayed on the computer too If the power SPD is configured the PIN1 and PIN2 of the customer 1 terminal J19 have been connected with alarm signal of power SPD in factory and the alarm is set to be normally closed NC General alarm terminal The general alarm relay connected with 19 and 20 on the terminal block see Figure 3 7 has a set of NC dry contact which can be set to normally closed by software When serious alarm is generated the contact is closed This can be used to send a remote alarm sending signals to the building management system or dialing the paging system automatically Lead standby switch over and requir
36. d 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 Power cable of the indoor unit 3 ph 3 x L N PE 2 Power cable of the outdoor unit standard model L N PE and Lee Temp model L L N PE 3 Unit monitoring and control cable if remote control is applicable 4 Energy saving card cable if applicable 3 2 Notes This AC is a professional device used in industrial commercial or other professional occasions It is not for sale to general public Its total rating power is larger than 1kW complying with IEC61000 3 12 standard A port with no less than 250 short circuit ratio is required between the user power and the grid The user needs to get permission from the power supply department to ensure that the AC is connected to a power with no less than 250 short circuit ratio 1 All power and control wiring and ground connections must be in accordance with the national and local electrician regulations 2 Refer to unit nameplate for full load current Cable size should be in accordance with the local wiring rules 3 Mains requirement 3 ph 380Vac 50Hz 3 x L N PE 4 The electrical installation must be completed by trained professionals 5 Before the wiring use a voltmeter to measure the power voltage and make sure that the power has been switched off 6 An all pole disconnection
37. device must be configured upstream the device to ensure operation safety 7 lf the mains cord is damaged it must be replaced by professional maintenance personnel 3 3 Connecting Power Cable Of Indoor Unit The unit does not have a power cable of indoor unit according to standard configuration please contact Emerson or purchase it on your own The recommended cable size is not less than 10AWG 6mm Use the provided inner hexagon wrench to loosen the fixing screws of the indoor unit door lift and loose the front door and then disconnect the display board connecting terminals after that you can remove the front door At this point the power output terminal of the indoor unit is revealed at the left side panel as shown in Figure 3 1 New Liebert DM Series Air Conditioner User Manual 18 Chapter 3 Electrical Installation J x dl TW qi 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 0000 Giese LPI lo o PE terminal N line terminal L3 line terminal L2 line terminal L1 line terminal Power output terminal ci
38. dix 2 Param ter Setting Table irte coh e e e EUER BIS DP Ui E Me us 45 Appendix 3 RDU Cooling Air Conditioner Single Unit Manager Software Introduction seeeeee 47 Chapter 1 Overview 1 1 1 1 2 1 3 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 Model Description The model description of the Liebert DM AC is shown in Figure 1 1 DME07MC T 1 1 Standard 2 High efficiency Client code C cooling only O with heater H with heater and humidifier Input power supply M 380V 3 ph 50Hz Cooling capacity 07 7 5kW 12 12 5kW E indoor unit C outdoor unit L Lee Temp outdoor unit Liebert DM series air conditioner Figure 1 1 Model description Product Introduction The Liebert DM AC is a small precise environment control system specially designed for cooling the electrical devices It is applicable to environment control in equipment room and computer room Featuring high reliability it can maintain a favorable running environment for precise devices such as sensitive devices industry process devices communication devices and computers The cooling kit is provided as standard and it can precisely control the ambient tempe
39. djustment over the device Alarm Manage This menu allows you to query the real time alarms and configure the alarm notification parameters Report Manage This menu allows you to query history alarm history device data cuive report and history system logs It also provides print and print preview functions System Manage This menu includes User Manage and System Title User Manage menu allows you to add delete users modify user information and give them different levels of operation authorities according to their duties System Title menu allows you to set the system title of the RDU Cooling manager Online Help The Online Help menu provides an electronic file of the manual Selecting this menu opens the electronic file of RDU Cooling Air Conditioner Single Unit Manager User Manual EQ Note 1 The RDU Cooling software CD is included in the unit accessory for free 2 For detailed descriptions of RDU Cooling refer to RDU Cooling Air Conditioner Single Unit Manager User Manual This manual is installed together with the software on the computer and you can find it through the Online Help menu New Liebert_DM Series Air Conditioner User Manual Emerson Network Power Asia Australia T 1800 065345 F 61 2 97810252 Indonesia T 62 21 2513003 F 62 21 2510622 n 3 54038564 Ja T F 81 3 54032919 81 81 Korea T 82 2 34831500 F 82 2 5927886 Malaysia T 603 78845000 F 603 7884
40. e 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 It is recommended to clean when necessary the humidifier tray once a month The humidifier tray is shown in Figure 6 5 Figure 6 5 Humidifier tray If the water stays entering the humidifier or the input voltage of the humidification electrode is normal but the water fails to boil It indicates that the humidifier reaches its service life and needs to be replaced See the following procedures to replace the humidifier 1 Turn off the humidifier by setting the humidity setpoint lower than the actual humidity in equipment room 2 Place the RUN DRAIN switch to DRAIN position to drain the humidifier 3 Turn off the AC power 4 Remove the connection cable of the humidification electrode and high water level probe from the canister LO Note Canister and steam hose may be very hot Allow time for the humidifier to cool before replacement 5 Loosen the steam outlet hose clamps and remove the steam hose from the canister fitting 6 Remove the canister from the humidifier bracket Pay attention to protect the O ring Reverse previous steps to re assemble the humidifier paying special attention t
41. e same as the rated voltage on the unit nameplate 3 The power cables and earth cables connected to the disconnect switch indoor unit and outdoor unit are connected properly 4 The circuit breakers or fuses have proper ratings for equipment installed 5 The control connections are completed 6 All wiring and connector connections are tight The fixing bolts are tight After confirming the preceding points you can plug the display board connecting terminals restore the front door and then start start up inspection amp function testing New Liebert_DM Series Air Conditioner User Manual 24 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 ltem Inspection requirements Panel No damage well insulated and clean Filter Installed in place and reliably no damage and clean Measure and record the voltage before the system is powered on Power cables are connected Power supply reliably The outdoor unit is installed reasonably the pipes are supported and sloped down properly the trap is installed in a correct position Outdoor unit Fan No obstruction material in inlet and outlet area Humidifier if applicable Water supply pi
42. 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 Liquid pipe OD inch Equivalent length m 90 elbow 45 elbow T type three way 3 8 0 21 0 10 0 76 1 2 0 24 0 12 0 76 5 8 0 27 0 15 0 76 3 4 0 3 0 18 0 76 7 8 0 44 0 24 1 1 1 1 8 0 56 0 3 1 4 Installation Notes Of Connector Be careful when connecting the quick thread connector Read through the following steps before making connection 1 Remove the dust proof caps 2 Carefully wipe coupling seats and threaded surface with a clean cloth 3 Lubricate the male thread with refrigerant oil 4 Thread the coupling halves together by hand to ensure that the threads mate properly 5 Tighten the coupling body s hexagon nut and union valve until a definite resistance is felt 6 Use a marking pen to draw a line lengthwise from the coupling union nut to the bulkhead Tighten the nuts an additional quarter turn with two wrenches The misalignment of the lines shows how much the coupling has been tightened The final quarter turn is necessary to ensure that the joint does not leak Two wrenches must be used to cooperate with each other during connection because one wrench can damage the coupling copper lines easily The recommended torque values are listed in Table
43. ement terminals The PIN17 and PIN18 of the lead standby switch over terminal and the PIN7 and PING of the requirement terminal J19 see Figure 3 7 are used to connect two AC units working in master slave mode The connection mode is shown in Figure 3 8 Lead standby 5 Lead standby requirement J19_7 8 switch over 17 18 Master Slave Lead standby Lead standby Switch over 17 18 requirement J19 7 8 Figure 3 8 Connection in master slave mode 3 5 2 Connecting Monitoring Port Cable The RS485 port of the Liebert DM indoor unit is located on the J39 terminal on the PCB see Figure 3 6 use a twisted pair communication cable to connect it with the upper machine Multiple Liebert DM ACs can realize simultaneous multi units monitoring through RS485 bus Taking RDU Cooling host monitoring software developed by Emerson for example Figure 3 9 introduces a networking mode of RS485 bus monitoring two AC units simultaneously ES de ee Converter DataMate3000 unit DataMate3000 unit software is installed RS232 RS485 number is 1 number is 2 RS485 bus Figure 3 9 Networking mode monitoring two AC units 3 6 Connecting Energy Saving Card The energy saving card is shown in Figure 3 10 New Liebert_DM Series Air Conditioner User Manual 22 Chapter 3 Electrical Installation
44. f the indoor unit uses a 20mm 3 4 connector with hose barb connections one of which is used to fasten the outdoor drain pipe The drain pipe cannot be placed in position with freezing temperature The drain pipe should be the full size of the drain pipe connector CE Note The drain pipe of the indoor unit equipped with a humidifier must be able to endure the boiling 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 2 6 6 Connecting Humidifier Water Supply Pipe If Applicable Connect one end of the humidifier water supply pipe to the connector of the humidifier water supply pipe shown in Figure 2 14 and the other end to the water tap through the knock out hole of water inlet pipe shown in Figure 2 12 New Liebert DM Series Air Conditioner User Manual Chapter 2 Mechanical Installation 15 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 Rubber gland Water supply pipe connector 3 4 Figure 2 14 Humidifier water supply pipe connector of standard series indoor unit 2 7 Removing Transportation Fastener And Vibration Absorber To protect partial components from damaging and distorting due to bumping
45. fan runs at low speed Adjust the humidity setpoint to 10 higher than the indoor relative humidity If the fan automatically runs at high speed it means that the dehumidification function is normal Note that during the testing process if the indoor temperature is 3 C higher than the temperature setpoint the system may enter a forced cooling mode and the dehumidification demand will not be responded La Note Restore the humidity setpoint to the default or the original value after the test 4 2 5 Checking Refrigerant Charge Capacity Of Lee Temp Outdoor Unit The Lee Temp outdoor unit has been charged with refrigerant before delivery Check whether the refrigerant charge capacity is proper after powering on by using the following method When the high pressure is not lower than 240psig 16 5bar the liquid level of the refrigerant will reach the 1 2 point of the tank sight glass When the ambient temperature is low and the high pressure cannot meet the requirement you can block part of the upside and downside of the air intake uniformly to obtain required pressure If the liquid level cannot meet the requirement you should discharge or refill the refrigerant for a proper liquid level length Reclaim the discharged refrigerant according to correlative requirement New Liebert DM Series Air Conditioner User Manual 26 Chapter 5 Micro Processing Controller Chapter 5 Micro Processing Controller This chapter gives a detailed descript
46. fier 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 The humidifier consists of a steam canister with automatic flushing control function inlet tube drain tube solenoid valve and steam distributor Ea Note 1 The electrode humidifier should be installed and tested in factory 2 The Liebert DM AC can control the ambient humidity only after a humidifier is installed Heater A ceramic heater with positive temperature coefficient can be selected It is safe and reliable When the surface temperature is too high it will reduce the heating power to avoid danger caused by over temperature A temperature Switch is provided on the surface of the heater and it will cut off the power of the heater when the surface temperature is too high When the surface temperature decreases to normal the temperature switch will restore the operation of the heater automatically Remote Monitor The Liebert DM AC communicates with the host computer through a configured RS485 port and receives the control of the host software You can also select and configure a monitoring card to realize different monitoring functions For the descriptions of the host monitoring software RDU Cooling developed by Emerson refer to Appendix 3 RDU Cooling Air Conditioner Single Unit Manager Software Introduction Energy Saving Card The Liebert DM AC can monitor the maximum room
47. gt System Status System Menu Figure 5 7 Main Menu screen The menu items in the Main Menu screen are described in Table 5 3 Table 5 3 Main Menu description Menu item Descriptions Alarm Menu Set alarm parameters browse alarm historical records and alarm status records Set Points Set temperature amp humidity setpoints and their sensitivities Browse ambient temperature amp humidity system output status and system running records browse and set system time Set system parameters and system options calibrate sensor change password output system diagnose restore factory parameters configure optional function Help Menu Browse factory information product information and maintenance information Display Set Adjust the screen contrast System Status System Menu 5 6 2 Alarm Menu Select Alarm Menu on Main Menu screen to enter the screen shown in Figure 5 8 Press the Up or Down button to scroll up or down the menu items Alarm History Alarm Setting Figure 5 8 Alarm Menu screen Active Alarm The Active Alarm menu is used to monitor the present alarm status of the AC unit and prompt No Alarm or detailed alarm status information The detailed alarm status information includes XX YY alarm type and alarm start time as shown in Figure 5 9 XX is the serial number of alarm status record and YY is the total number of alarm status record New Liebert DM Series Air Cond
48. igure 2 2 for details Outdoor unit REN Liquid pipe not be exposed to sun lt Indoor unit Max 20m Humidifier canister water supply pipe to water tap EF Protection Isolataion tube floor p 7 5m IHGHSHSHSESHSHGHuHUHoHsHgHoHcHuHGHUuHHHGHSHUHSHU HouHuHsHsuHgHcoHuHuHcH Sealed Discharge pipe slope Insulation Floor Condensation water 1 200 material drain pipe to outdoor 1 200 1 Outdoor unit above indoor unit Indoor unit 5 Protection tube Discharge pipe slope 3 1 200 Humidifier canister water Sealed ES Isolation floor supply pipe to water tap Liquid pipe not be N ho gt Al exposed to sun Daan DNE SENT HOME Ns xz Outdoor unit ae A Us Insulation Floor Condensation water lt gt material drain pipe to outdoor 1 200 E Y jus z Indoor unit above outdoor unit Figure 2 2 Installation illustration New Liebert_DM Series Air Conditioner User Manual Chapter 2 Mechanical Installation 7 2 3 3 Mechanical Par
49. impact and resonation fasteners and vibration absorbers are mounted at certain locations before delivery Remove the fasteners and vibration absorbers before the installation and commissioning Removing transportation fixing plate of compressor To reduce the compressor operation vibration and noise the vibration absorbing cushions are added to the compressor base However such method cannot best restrain the equipment vibration during transportation and may result in loosened connections and wearing of certain parts To prevent this three L shaped fixing plates are added to the compressor base as shown in Figure 2 15 L shaped fixing plates 3 pcs Figure 2 15 Positions of fixing plates After the installation and before commissioning remove the three L shaped fixing plates and then restore the bolts and washers The fastening torque of the bolts is 12 1 N m 2 8 Adding Refrigerant For Long Pipe System The Liebert DM AC has been charged with appropriate refrigerant before delivery If the connecting pipe between the indoor unit and the outdoor unit is longer than 10m add refrigerant to the system in order to ensure normal system operation according to the following formula Adding refrigerant amount kg adding refrigerant amount per meter of liquid pipe kg m x total length of extended liquid pipe m See Table 2 6 for the adding refrigerant amount per meter of liquid pipe New Liebert DM Series Air Conditioner User
50. ing manager include e 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 e Data query Current equipment operating data current alarm data curve report and history data of the Liebert_DM AC can be queried e Alarm notification The RDU Cooling manager can send an e mail and a short message to the user when an alarm occurs to the equipment e Remote control The RDU Cooling manager provides remote control function for the Liebert_DM AC e Remote adjustment The RDU Cooling manager provides remote adjustment function for the Liebert_DM AC Report management The RDU Cooling manager provides alarm report operating data report operating data curve report and system log report of the Liebert_DM AC and supports multiple pages display of the report and data export functions e User management Users can be added modified deleted and given different levels of software operation authorities according to their duties As shown in Figure 2 the menu area provides five menus as described in Table 1 Table 1 Menu description Menu Description Device Monitoring This menu allows you to add change and delete device site configure alarm notificaition function view current analog signal data status signal data and alarm information of the device perform remote control and a
51. ion 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 2 Adopt a 128 x 64 dot LCD screen with white backlight The user interface is easy to use 3 Provide three level password protection to prevent unauthorized operation effectively 4 Provide the functions including self recovery upon power failure high voltage amp low voltage protection phase loss protection and automatic phase sequence switching upon anti phase 5 Accurately know the running time of important components through menu operation 6 The expert level fault diagnose system can automatically display the current fault information to facilitate maintenance personnel in equipment maintenance 7 Store up to 200 historical alarm records 8 Configured with an RS485 port 5 2 Appearance The micro processing controller panel is shown in Figure 5 1 EMERSON LCD screen Control buttons Running state indicator Alarm indicator Figure 5 1 Micro processing controller panel 5 3 LCD Screen The LCD screen displays English menus with white backlight When the system is operating normally it displays the current temperature amp humidity whether to display humidity is
52. ioner User Manual Chapter 2 Mechanical Installation 9 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 Recommended location Not recommended location Figure 2 6 Installation location of the indoor unit 2 4 3 Installation Procedure 1 Secure the mounting base made by yourself on the selected location The outline and dimensions of the mounting base are shown in Figure 2 7 510 2 IL Rubber cushion j 8mm 10mm thickness A A7 LEHRMI Z ITS LL FAL Y T y LISIS RATA ri Rubber cushion pd 8mm thickness Angle iron 30 x 30 x 3 or square tube 25x 25 x 3 L LI Steel plate 60 x 60 x 4 Mounting base of DME07kW indoor unit A 600 z SILIU AAT FEIT TFL FET PEUT RW TT IE A Rubber cushion 8mm 10mm thickness 4 7 H gt 150 t gt Rubber cushion m Ed 8mm thickness Angle iron 30 x 30 x 3 or square tube 25x 25 x 2 Installation hole for gt LY expansion bolt M6 x50 lt Steel plate 60 x 60 x 4 Mounting base
53. ir should be blown at the reversed airflow direction In winter do not let snow to accumulate around the side or underneath the condenser Check for bent or damaged fins and simply repair them if necessary Check all refrigerant pipes and capillaries for vibration and support them if necessary Carefully inspect all refrigerant pipes for signs of oil leakage determining the leakage position Low Temperature Unit Of Lee Temp Outdoor Unit Periodically check the liquid level of the refrigerant in fluid reservoir to ensure that no refrigerant leakage happens For detailed operation refer to 4 2 5 Checking Refrigerant Charge Capacity Of Lee Temp Outdoor Unit Periodically check whether the heating belt of the fluid reservoir works normally See following for details When the system is powered on and standby and the fluid reservoir pressure is lower than 0 85Mpa the heating belt preheats the fluid reservoir If the heating does not happen check whether the fuse of the heating belt is blown or if the pressure switch works normally After confirming the fault part s replace it or them The heating belt fuse specifications are listed in Table 6 2 Table 6 2 Fuse specifications Manufacturer Model Voltage Rated current Bussmann S500 1A 250V 1A Littelfuse 0217001 250V 1A New Liebert DM Series Air Conditioner User Manual 42 6 4 Chapter 6 System Maintenance Maintenance Inspection Checklist cl Note Regul
54. itioner User Manual 30 Chapter 5 Micro Processing Controller Figure 5 9 Active Alarm screen EN 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 2 The alarm status records will be automatically cleared upon system power off Alarm History The Alarm History menu is used to view the historical alarm record of the AC unit including XX YY alarm type alarm start time and alarm end time if the alarm is not ended the screen displays Not Ended Yet as shown in Figure 5 10 XX is the serial number of the historical alarm record and YY is the total number of the historical alarm records Figure 5 10 Alarm History screen EN Note 1 Press the Up or Down button to scroll through the historical alarm records if more than one alarm is activated 2 Up to 200 historical alarm records can be stored They will not be cleared upon system power off Alarm Setting The Alarm Setting settings will not be lost when the power fails The Alarm Setting screen is shown in Figure 5 11 For detailed setting ranges refer to Appendix 2 Parameter Setting Table LL Note It is not recommended to change the defaults If the change is necessary change them under the guidance of the trained professionals Figure 5 11 Alarm Setting screen New Liebert DM Series Air Conditioner User Manual Table 5 4 Alarm output logic
55. j Hum Sens Inner Fan LackVolt Active Alarm NTCOAd ees Alarm History Compresser Press FreqShift Alarm Setting Heater Press InFanStart Humidifier InFanStop LoTempSt Speed Phase B System LCP MinOn tias CP MinOff HiHumSt Outter Fan Phase C GSBEREI oldStrt LoHumSt Comm Alm Pwr Freg umen um Ctr Air Diff Spare Ena SW Code AA Temp Com Hi Press EC output P p ResetFactor Lo Press Manual Op u Fan type DschgTemp Hi Press yp Hum Fail Lo Press EC Max Output EC Dehum Output TepmSnsr DsTemp p HP LOCK Water UF Min Volt LP LOCK Customer1 Max Volt i Outdoor OutputVolt Dschg LOCK Hum Fail Unit p Press Bd Water UF Customer2 SpareReq St Press Power Lost T Heater Num Power OV Run Time Hum Num Power LV Inner Fan A Ecnmy Mod Power ES Compressor AS A Heater Start At Power PL SA End At Power PR Humidifier Zoom Customer1 Outer Fan T H Card Num T H Card Run Records Select Sleep At Air Lost Inner Fan Options m Customer2 Compressor e Press Snsr Heater H 93K Hum Snsr T Humidifier Ad AirlostSnsr Outer Fan mpm Cstmr1Polar Switch Mod Cstmr2Polar BE ComAlmPolar ClearAlmHis Rt At Change Level One Password Level Two Figure 1 Menu structure New Liebert_DM Series Air Conditioner User Manual Appendix 2 Parameter Setting Table 45 Appendix 2 Parameter Setting Table
56. ndoor unit fan heater outdoor unit fan and humidifier may still carry hazardous voltage So switch off the circuit breaker to disconnect the power supply of the system before maintenance Electric Inspection Visually inspect the control board power detection board filter board display board and THS board on a semi annual basis for any loose electric connection and circuit corrosion The micro processing controller has five circuit boards which jointly complete the system fault detection input and output Inspect the boards one by one according to the procedures below 1 Do unit electric insulation test to find failed contacts and deal with them 2 Statically check and test if the contactor is flexible without blocking 3 Clean the electric and control components with a brush or compressed dry air 4 Check if the contactor contacts have arc or burned phenomenon when closing 5 Tighten all electric contacts 6 Check if the temperature of all MCBs and contactor contacts become higher La Note 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 The control board can only be maintained after the micro processing controller is powered off Indoor Unit Maintenance Filter The filter is a consumable Its replacement interval is directly related to the seal and cleanness status of the e
57. nection Terminal designation Figure 3 4 Power connection figure of Lee Temp model outdoor unit 3 5 Connecting Control Cable 3 5 1 Connecting Control Terminals The control terminals are located on the PCB and terminal block of the electrical control box as shown in Figure 3 5 New Liebert DM Series Air Conditioner User Manual 20 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 Ca Note Before connecting the control cables connection personnel must take anti static measure J34 temperature and humidity detection board J13 single board power input J16EC fan control J23 pressure sensor p o Be O O al SOLE ST BI mm KO Eo m 4 TI O ES wali LES F aa 3 SO mr or s m ar xA al v E T O i 8 OQ Du ciy 592 MET E TS i H o E J14 monitoring HOMO pxp mole TEL eN
58. ns O 1 set Heat Num to 1 before setting Hum 0 Hum Num to 1 Economy Mod OFF OFF ON Select Options_CostSave Start At 22 00 18 00 3 00 Mod Economy Mod End At 7 00 5 00 10 00 a Zoom 2 C 2 C 10 New Liebert DM Series Air Conditioner User Manual 46 Appendix 2 Parameter Setting Table Menu Parameter Default Setting range Select EngySave Cd Num 0 0 4 eae Sleep At 27 C 15 C 40 C System Unit Status SIG SIG HST Standby Menu Select Switch Mod Standby Standby Rotate Options_Standby Rt Time 1d 1d 7d Rt At 12 00 0 00 23 00 Change Password Level One 0001 0000 9999 New Liebert DM Series Air Conditioner User Manual Appendix 3 RDU Cooling Air Conditioner Single Unit Manager Software Introduction 47 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 You can use the WEB browser to log in the RDU Cooling manager to perform monitoring and management over the Liebert DM AC After you have logged in the RDU Cooling manager the screen displays the primary interface as shown in Figure 2 1 2 3 4 5 6 Liebert rbu cooling Performance Mpnitoring RDU Cooling Manager J tor time 20
59. nt The system general arrangement diagram is shown in Figure 2 1 The standard pipe sizes are shown in Table 2 1 Condenser coil ius Check Traps install one d ga for every 7 5m of valve SS Evaporator coil vertical lift e P YA P d Refrigerant 7 pd f e distributor ml a A NEY g di um H f Thermal Discharge i Liquid expansion pipe i N pipe valve Hoa Hon Filter I N Valve core Z Sensing bulb H on Suction pipe E o H V4 Compressor It AH Female connector Figure 2 1 General arrangement diagram New Liebert_DM Series Air Conditioner User Manual 5 6 Chapter 2 Mechanical Installation 13 Note 1 Factory piping 2 222222222 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 Solenoid valve is a part of extended piping kit Table 2 1 Standard pipe sizes Actual cooling capacity Pipe length m Discharge pipe OD Liquid pipe OD 7 5kW unit 5 1 2 12mm 3 8 10mm L DM panes 12 5kW unit 5 5 8 16mm 1 2 12mm 2 3 2 System Installation Illustration All equipment must be installed vertically The Liebert DM AC is available in two installation modes outdoor unit installed higher than indoor unit and indoor unit installed higher than outdoor unit See F
60. o the following 1 Protect the O ring between the sealing canister bottom and the humidifier bracket 2 Check and ensure that the steam outlet hose is connected without leakage New Liebert_DM Series Air Conditioner User Manual Chapter 6 System Maintenance 39 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 gv Power SPD Figure 6 6 Power SPD position The power SPD has four status indicators as shown in Figure 6 7 The status indicators are green in normal operation they become red upon failure Status indicator 4 pcs Status indicator 4 pcs uw ALARM ALARM g p Ico loo 1 ph power SPD 3 ph power SPD Figure 6 7 Status indicator position of power SPD The power SPD does not need special maintenance It needs regular check for non loosening and normal status indicating 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 1 is generated see SPD Customer 1 terminal in 3 5 1 Connecting Control Terminals 6 2 7 Thermal Expansion Valve The thermal expansion valve keeps the evaporator supplied with enough refrigerant to
61. of DME12kW indoor unit Figure 2 7 Mounting base unit mm 2 Lay a rubber cushion with 8mm 10mm thickness on the mounting base as shown in Figure 2 7 3 Place the indoor unit onto the mounting base and secure it 4 Rotate the grilles to regulate the airflow direction of the indoor unit and the regulating angle is 45 as shown in Figure 2 8 New Liebert DM Series Air Conditioner User Manual 10 2 5 2 5 1 2 5 2 Chapter 2 Mechanical Installation The grilles can be rotated following the arrow direction Grill Figure 2 8 Regulating airflow direction Installing Outdoor Unit 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 2 Do not locate it directly in the environment that requires low noise 3 To ensure heat dissipation effect locate it in a clean area which is away from loose dirt and foreign matter to avoid clogging the heat exchanger 4 Do not locate it in the vicinity of steam hot air and exhausts 5 Keep a clearance of more than 450mm between the outdoor unit and the wall obstruct and adjacent devices 6 Avoid areas where snow will accumulate at air inlet side and air outlet side of the outdoor unit 7 Prepare a solid base capable of supporting the outdoor unit weight see Table 2 2 The base should be at least 50mm higher than the su
62. optional Only the unit configured with a humidifier can display humidity see Select Options in 5 6 5 System Menu for details unit output status cooling heating dehumidifying and humidifying unit mode single lead standby unit operation status running standby locked alarm information and current date 8 time as shown in Figure 5 2 21C HEAT SIGL 50 HUM RUN High Hum 4 2012 01 01 00 00 Figure 5 2 LCD screen New Liebert_DM Series Air Conditioner User Manual 5 4 5 4 1 Chapter 5 Micro Processing Controller 27 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 Control Buttons Function Description The micro processing controller provides five control buttons as shown in Figure 5 3 ON OFF button D A Up button Enter button ENT VY Down button Esc button ESC Figure 5 3 Control keypad The functions of the control buttons are described in Table 5 1 Table 5 1 Function descriptions of control buttons Control button Function descriptions ON OFF button Press this button for 3s to turn on or off the unit Enter button ENT Enter the selected menu screen Validate the parameter setting value Exit the current menu and return to the Normal screen or previous menu screen Abort parameter ch
63. ow door unit SS lt 50mm 5 50mm pe eee Di Min 50mm v s Aust Base Outdoor unit base Figure 2 11 Installing multiple outdoor units with one above the other Piping for AC Unit General Principles 1 Use copper pipes with quick thread connector to connect the indoor unit and the outdoor unit If the pipe length exceeds the standard pipe length see Table 2 1 and straight copper pipe is used piping joints must be brazed 2 Follow standard industry procedures in selection and placement of pipe system evacuation and charging with refrigerant only when pipeline is too long The standard refrigerant of the AC unit is R22 3 Give considerations to pipeline pressure drop oil return to the compressor to avoid oil leakage and clogging in parts of the system and minimize noise and vibration to the greatest extend 4 Consult Emerson before installation on whether measures such as using extended piping kit are needed if the equivalent length exceeds 50m or if the vertical distance between the indoor unit and the outdoor unit exceeds the values in Table 2 3 Table 2 3 Vertical distance between indoor unit and outdoor unit Relative position Value Outdoor unit installed higher than indoor unit Maximum 20m Outdoor unit installed lower than indoor unit Maximum 5m New Liebert DM Series Air Conditioner User Manual 12 2 6 2 2 6 3 Chapter 2 Mechanical Installation 5 The equivalent length of
64. pe and drain pipe are connected water level sensor is secured correctly Heater if applicable Heating components are secured reliably Power SPD if applicable The module is secured reliably Controller The wiring connections are tight After inspecting and confirming the above items you can power on the AC unit The inspection requirements after starting up are listed in Table 4 2 Table 4 2 Inspection items after starting up Item Inspection requirements Fan The rotation direction is correct record the rated full load current and actual current of the fan motor Heater if applicable Record the heater current Outdoor fan The rotation direction is correct record the rated full load current and actual current of the fan motor Record the user setpoints return air temperature suction pressure discharge pressure Others compressor current and discharge air temperature 4 2 Function Testing oO Note The AC unit carries hazardous voltage Cut off the power before testing the equipment Test should be done under the guidance of Emerson professional maintenance personnel or trained maintenance personnel 4 2 1 Cooling Adjust the temperature setpoint according to 5 6 3 Set Points to 5 C 10 F lower than the indoor temperature Then the control system should trigger the cooling demand and the compressor starts to work After at least 3min of cooling adjust the temperature setpoint to 5 C 10 F
65. quipment room In order to maintain efficient operation the filter should be checked monthly and be replaced or washed as required The filters of the indoor unit are installed on the front door and side panel e Filter on the front door Unscrew the fixing screws on the filter stator and remove the filter stator to take out the filter on the front door as shown in Figure 6 1 New Liebert_DM Series Air Conditioner User Manual 36 Chapter 6 System Maintenance ornate ES Stator Fixing screw 2 pcs A amplified Filter Front door Figure 6 1 Taking out the filter on the front door e 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 Side panel d Er Filter A go Side panel A amplified Guide rail Stator Fixing screw 2 pcs 2 pcs 2 pcs x a e gor Figure 6 2 Taking out the filter on the side panel 6 2 2 Fan The monthly inspection items of the fan kit includes motor operation status impeller status fan kit fixation and clearance between fan and impeller Inspect the motor bearing and impeller monthly and replace it if any damaged impeller is found Check that the impeller is tightly mounted on the rotor of the motor and does not rub against its neighboring metal components during rotation Since the fan kit operates 24 hours eve
66. r Cable Of Outdoor Unit eene nnne nennen nennen nennen nnns 19 3 5 Connecting Control Cable sosina high eesti UE Ede phot bia bu C eade de es 19 3 5 1 Connecting Control Terminals enne nnne 19 3 5 2 Connecting Monitoring Port Cable ooonocccnncccinocononcnonocononcnonacononcnnnncn nono nnnn nan n cnn n caro rennes ener 21 3 6 Connecting Energy Saving Cardio di 21 O A cede E d ee et d Ct vam edd Rs 23 Chapter System Testing d mette test elumiib vetet 24 4 1 Stam p Inspecti h hts eoo Rau ERE 24 A 2 FUMCtOn TEST e iaa 24 AD AC OOMMG sess ok sashes cc tis eA PLI Em 24 4 2 2 Heating uin RI EE Ae td a tes 24 4 2 3 H midifylIng reat tied it 25 4 2 4 DehumliditylDgs iii te m ne m team mae ted eii 25 4 2 5 Checking Refrigerant Charge Capacity Of Lee Temp Outdoor Unit 25 Ghiapter 5 Micro Processirig Controller o 2i fet ertt dona a 26 Bil Eeat re EDU O 26 5 2 AppearalCe 2 te E ERE e Uh eee naa n E RE RU e e arcae 26 JRdNsPESUIIIM EE 26 5 4 Control BUtlotis 2 dioe DERE E ERE FREU E A RR DUE I 27 5 4 4 F nction Description iie ect tice ee cn pce ge edge 27 5 4 2 Operatiori Example aloe de mime iiudat mtu 27 5 5 Gontrol Screens o ese d de d Rd We de o a e e ed Ras 28 5 5 ON SCIGODn on at tad ute tl utat aue 28 5 5 2 A ee nee an be REIR e EO nee eed 28 55 3 Password Cr ate 28 MEU CU e phu docti docct cni Le 29 5 6 Ma Menus zit E eee E iaa 29 5 6 2 AlarmiMenu c em ee A efe ete A e oae teet 29 9
67. rature The heater and humidifier are provided as options and they can precisely control the ambient humidity If the AC unit is only used for cooling the options are not needed The Liebert DM AC provides a micro processing controller that can automatically switch over to the required function cooling or heating dehumidifying or humidifying based on the programmed setpoints and room ambient conditions Each Liebert DM AC consists of an indoor unit and an outdoor unit Both units are installed on the floor separately Indoor unit The Liebert DM AC includes units with a cooling capacity of 7 5kW and 12 5kW which are applicable to power supply of 380V 3 ph You can select them according to the actual equipment room conditions Outdoor unit The outdoor unit adopts air cooled mode It is classified into two models standard model and Lee Temp model The Lee Temp model can be used at lower temperature see Table 1 1 than the standard model Basic Performance Parameters The basic performance parameters of the Liebert DM AC are given in Table 1 1 Table 1 1 Basic performance parameters Nominal refrigeration Energy efficienc Heating capacity Humidification Model capacity mh POCO pe KW capacity kg h DME07M 1 7 5 2 5 3 0 3 2 2 5 DMET2M 1 125 415 30 32 25 DME07M 2 7 5 2 34 3 2 3 2 2 5 DME12M 2 12 5 3 9 3 2 3 2 2 5 New Liebert DM Series Air Conditioner User Manual 1 4 1 4
68. rrounding ground and 50mm larger than the dimensions of the outdoor unit base as shown in Figure 2 11 Installation Procedure 1 Place the outdoor unit on the base 2 Secure the outdoor unit onto the base with expansion bolts The installation hole sizes of the base are shown in Figure 2 9 and Figure 2 10 oo DEA A wt wt NR m e Y Y f1 P E 680 R6 a 787 Figure 2 9 Installation hole dimensions of standard outdoor unit base top view unit mm New Liebert_DM Series Air Conditioner User Manual 2 6 2 6 1 Chapter 2 Mechanical Installation 11 1037 ra 680 xi Li UF Y y 5S8 UT f y TN R6 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 4m 0 5m Out S door S unit Airflow Note 1 Use 5 angle iron for bracket when two units are installed with one above the other 2 Use 6 5 channel steel for bracket when PA 1 three units are installed with one above the Bracket other e Out Airfl
69. ry day continuously any unusual airflow obstruction must be cleared in time to avoid the damage to the cooling system and other system components caused by reduced air volume New Liebert DM Series Air Conditioner User Manual 6 2 3 6 2 4 6 2 5 Chapter 6 System Maintenance 37 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 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 The heater elements will heat continuously in normal station Inspect the heater every six months for its normal operation If the heater needs to be replaced please contact the Emerson maintenance personnel La Note The heater cable must be leaded through the thimble socket then connected to the heater Humidifier The humidifier kit consists of a bracket including water pressure components such as inlet solenoid valve and outlet solenoid valve humidifier canister humidification control board CP2 located in a metal box close to the humidifier including a current transducer TAM water in pipe drain pipe and steam pipe as shown in Figure 6 3 Pracet Steam pipe i Humidifier canister Drain pipe Water in pipe ens pna Figure 6 8 Humidifier
70. t be recycled in accordance with state and local regulations 4 Remove the failed compressor 5 Follow manufacturer s instructions to clean out kits New Liebert DM Series Air Conditioner User Manual 6 3 6 3 1 6 3 2 6 3 3 Chapter 6 System Maintenance 41 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 8 Charge the system with refrigerant based on the requirements of the evaporator condenser and refrigeration lines 9 Apply power to and operate the AC unit Check for proper operation Refer to the circulation suction pressure and discharge pressure ranges in normal operation and supplement some refrigerant if necessary Outdoor Unit Maintenance Refrigeration System The components of the refrigerant system should be inspected monthly for finding abnormal operation phenomenon in time Refrigerant pipes must be properly fixed and not allowed to vibrate against wall floor or the unit frame Inspect all refrigerant pipes every six months for signs of wear Air Cooled Condenser When the airflow through the outdoor unit is restricted use compressed air or fin cleaner alkalescence to clean the condenser off the dust and debris that inhibit airflow The compressed a
71. te speed control of the outdoor fan The expert level fault diagnose system can automatically display current fault information to facilitate equipment maintenance by maintenance personnel Thermal expansion valve Adopt a thermal expansion valve with external equalizer type It collects temperature and pressure signals at the same time to accurately regulate the refrigerant flow Strainer Filtrate the impurities generated during long term system operation and ensure normal system operation Filter Adopt nylon filter material with big mesh for Liebert DM AC The filter features compact structure and easy maintenance It can be washed repeatedly Outdoor Unit The outdoor unit consists of fan and condenser Other than the above components the Lee Temp model also includes a low temperature unit Fan Adopt axial flow blades with low noise The single phase motor with high performance is customized based on the power grid of base stations so it can work over a wide voltage range with high reliability Condenser Adopt a fin tube heat exchanger with high heat dissipation and wavy fins It is free of dust accumulation and can be easily cleaned and maintained New Liebert DM Series Air Conditioner User Manual 1 5 1 5 1 1 5 2 1 5 3 1 5 4 1 5 5 1 6 1 6 1 Chapter 1 Overview 3 Low temperature unit Make the AC unit operate in cooling mode normally at the lowest outdoor temperature of 34 C Options Humidi
72. temperature with the energy saving card located outside the unit cabinet The card is placed in position with high heat load and temperature Up to four cards can be used for an AC unit When the temperatures measured by all energy saving cards are lower than the setpoint in Sleep Mod and only indoor fan is running if the Sleep Mod is set to ENAB the AC unit will turn off the indoor fan and enter the sleep mode for saving the energy Power SPD The power SPD is used for second level C level lightning over voltage protection of the AC power It can be maintained easily and provides status indicating and alarm function Ea Note The humidifier heater and power SPD should be installed in factory Ambient Requirements Operation Environment The operation environment requirements are listed in Table 1 2 New Liebert DM Series Air Conditioner User Manual 4 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 Vertical distance HP 5m lt AH lt 20m Indoor unit vertical mode mounting base gt 150mm Installation mode i outdoor unit horizontal airflow mode Indoor 0 C 40 C Ambi moientiemperaturs Outdoor standard model 15 C 45 C Lee Temp model 34 C 45 C Ambient humidity 30 RH 80 RH Protection level Outdoor unit
73. the inlet solenoid valve Check and clean the outlet solenoid valve Replace the hose that has become rigid or fragile Clean draining pipes completely Low Temp low temperature unit Check for the liquid level of the refrigerant in fluid reservoir and leak of the fluid reservoir fittings Check whether the heating belt of the fluid reservoir works normally Notes Signature Make photocopies of this form for your records New Liebert_DM Series Air Conditioner User Manual Chapter 7 Troubleshooting 43 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 Unit does not start No power to unit Check unit input voltage Circuit breaker that controls voltage at the transformer is open Locate short circuit and reset circuit breaker Float switch relay has closed due to high water level in the condensate pump sump Check that drain pipes and pipelines are clogged or that the condensate pump is damaged Jumping cables not in place Check jumping cables on the control board No cooling Compressor contactor not pulling in Check for 24Vac 2Vac at the winding If the voltage is right check the contactor High compressor discharge pressure See High pressure alarm for
74. ving Gard alas IBID bee ii amis 3 1 5 5 Power SP D uie ode mid eu atat trt RD Rede cte eee i eevee 3 1 6 Ambient Regulremenls ssi marren iiaee rita at lina 3 1 6 1 Operation Envirohirient eiii eH ge e Ea e UD dett cr P De ed A Ee dede EE 3 1 6 2 Storage Environment i oe eie erre t bare iio 4 1 7 Refrigerant Charging Requirement sesssesssessseseseeeeeennn nennen nnn enn nennen nnns entente nnn rennen tenent ennt 4 Chapter2 Mechanical Installation 5 2 1 ail it dtd alie od da ate a 5 2 1 Unpacking And Inspection tte ti Re Ee ei end 5 2 2 Installation Notes 5 eei pe GE MD ERR RE ERO EL Anais 5 2 3 System Installation Arrangement ssessessesseeseeeeene enne nnne nnne nnne enne nne e nnne nnne nnns etn entrent nnns 5 2 301 General Arrangements il ertet te ma p tere ch Eat Pe EVE e ing e ed Roda a EP a EE 5 2 3 2 5ystem Installationillgstration uiia en E MORI BOCA GPS 6 2 3 3 Mechanical Parameters pee as 7 2 4 Installing Indoor Dilbert ern ee ree Pu et te lr e eif nec eias entes 8 2 4 1 Equipment Room RequirementS ccooccccnoncccnononcnonanencnnnonono nono n cnc nano cnn nn nnne nnn ran nr errar ren nennen 8 2 4 2 Installation Location Requirements essen mener nnne nennen entrer nnn 8 2 4 3 Installation Procedure 2 tei Re HERD a aaa ERR A n aT E RRURIR URGERE XRRERIRMARARR AR IRABE 9 2 5 Installing Outdoor rib ERREUR I EE eu re 10

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