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Vertiv | Liebert PEX4 | User Manual

Installation

2.8.11. Electrical Installation Inspection

After the electrical installation is completed, confirm the following points as given in the following

Table 2-17

Table 2-17 Installation Inspection Checklist

Items

Results

The power supply voltage meets the rated voltage on the unit nameplate.

The system electric loop has no open circuit or short circuit.

Power cables and ground cables to the MCBs, indoor unit and outdoor unit are well

connected.

The ratings of the MCBs and fuses are correct.

The control cables are well connected.

All the cables connections are fastened, with no loose screws.

Summary of Contents for Liebert PEX4 Series

Page 1: ...Liebert PEX4TM Series User Manual Precision Air Conditioning...

Page 2: ...s described in this document may not be within the purchasing scope or the usage scope Unless otherwise specified in the contract all statements information and recommendations in this document are pr...

Page 3: ...llowing table Situation Description Warning Danger Caution The Warning Danger Caution note indicates a hazardous or potentially harmful situation that can result in death or injury It also indicates i...

Page 4: ...ess it open the right door Before any maintenance operation switch off the unit with this electrical insulation device to eliminate risks such as electrical shocks burns automatic restarting moving pa...

Page 5: ...oth the equipment and the building Effective water drain connection and facilities should be available Installation should be precise Implementation of the application and service practices should be...

Page 6: ...eturn Arrangement 5 1 4 6 EMI Filter 5 1 4 7 Refrigeration Circuit 5 1 4 8 Electronic Expansion Valve EEV 6 1 4 9 Evaporator Coil 6 1 4 10 Dehumidification EC Fan 7 1 4 11 Remote Air Cooled Condenser...

Page 7: ...on Site Preparation 16 2 2 1 Equipment Room Requirements 16 2 2 2 Installation Space Requirements 17 2 2 3 Maintenance Space Requirement 18 2 2 4 Installation Tools 19 2 2 5 System Arrangement during...

Page 8: ...Removing of Fasteners of Infrared Humidifier 45 2 7 3 Removing of Fasteners from Electrode Humidifier 45 2 7 4 Removing Pipe Fasteners 47 2 7 5 Installation Inspection 47 2 8 Electrical Installation...

Page 9: ...Status 69 3 5 1 Temperature and Humidity Status 69 3 5 2 Power Information Display 71 3 6 Hardware and Software Information 71 3 7 Remote Monitoring Mode 72 Chapter 4 General Maintenance 73 4 1 Manual...

Page 10: ...Contents Chapter 5 Troubleshooting 79 5 1 Componentwise Alarm and Solutions 79 5 1 1 Fan Troubleshooting 79 5 1 2 Heating System Troubleshooting 80 5 1 3 Compressor and AC System Troubleshooting 80 5...

Page 11: ...ity 35 kW 45 kW 50 kW 60 kW with variable frequency drive single compressor and large cooling capacity units 70 kW 80 kW 90 kW 100 kW 110 kW 120 kW with two variable frequency compressors To improve f...

Page 12: ...ebert PEX4 series precision air conditioner PEX4 for short hereafter is professional equipment which is a medium large size precision environment control system suitable for the equipment room or comp...

Page 13: ...mp Sensor 8 R 410a EC Scroll Compressor Single Circuit 6 Supply Air Sensor Supply Air Temp Sensor 9 R 410a EC Scroll Compressor Dual Circuit 7 High Temp Supply Air Temp Sensor Smoke Sensor Digit 11 Hu...

Page 14: ...m nozzle s and PP Plastic impeller s The fan motors are Electronically Commutated EC IP54 with internal protection and speed regulation via controller signal The fans is statically and dynamically bal...

Page 15: ...stem EMI filter conforms with class B standard and IEC No EN55014 1 1 4 7 Refrigeration Circuit The refrigeration system is of the direct expansion type and includes one or two hermetic scroll compres...

Page 16: ...sure thereby resulting in substantial energy savings EEV also helps in maintaining constant superheat Figure 1 3 Electronic Expansion Valve 1 4 9 Evaporator Coil In PEX4 series parallel flow tube evap...

Page 17: ...SIC card optional to configure SNMP protocol 1 4 14 Color Display and HMI Features PEX4 is equipped with 9 inch color display which enables monitoring of operating status of the precision AC through...

Page 18: ...n which is quite important for mission critical applications These humidifiers reduce the dependency of water quality No Description No Description 1 Inlet pipe 2 Outlet joint Figure 1 5 Infrared Humi...

Page 19: ...The lower surface temperature of the heater prevents the air from being ionized thereby extending the service life The 1 stage heater capacity is 9 kW for models P1035 to P1060 and 12 kW for rest of t...

Page 20: ...1 5 5 Smoke Detectors The smoke detectors immediately shut down the system and activate the alarm system when activated The smoke detectors are mounted in the electrical panel with the sensing element...

Page 21: ...ing a higher level of air cleanliness 1 5 8 Low Temperature Kit In order to ensure that the air conditioner should normally start in the cold regions a low temperature kit is configured to effectively...

Page 22: ...on level cooling unit IP20 Altitude 1000 m derating is required when location altitude is above 1000 m Operating voltage range 380V to 415V 3 Ph N 50 Hz 60 Hz 1 6 2 Storage Requirements Table 1 3 Stor...

Page 23: ...roads without too many bumps are strongly recommended Liebert PEX4 unit is heavy it is recommended to use the mechanical equipment like electrical forklift to move the unit Move the equipment to the...

Page 24: ...pack it Follow the procedures below for unpacking Removal of Paper Packaging Remove the packaging tape and carton at first then remove the top cover followed by dismantling the unit on the sealing pla...

Page 25: ...Firstly straighten all the hooks holding side panel I and remove side panel I Then straighten all the hooks holding side panel II and remove side panel II Finally remove top cover III as shown in Figu...

Page 26: ...quipment Room Requirements The equipment room must be prepared before installation to ensure a smooth operating flow and to achieve the expected results The data center must meets the standards to be...

Page 27: ...odifications are not implemented then Vertiv does not guarantee the accuracy and precision of the temperature and humidity provided by the unit 2 2 2 Installation Space Requirements Adequate installat...

Page 28: ...t for maintenance space is given in Figure 2 7 Figure 2 7 Maintenance Space of Unit Normal maintenance space requirements are given in Table 2 1 Table 2 1 Normal Maintenance Space unit mm inch Space L...

Page 29: ...orklift Drill Wire cutting pliers Claw hammer Diagonal cutting pliers Insulating shoes Anti static gloves Electrician knife Cable ties Insulating tape Insulating gloves Crimping pliers Heat shrinkable...

Page 30: ...n and maintenance processes are well insulated 2 2 5 System Arrangement during Installation The refrigerant piping is required to connect the indoor and outdoor units of the air cooled system The syst...

Page 31: ...ctronic Expansion Valve 7 Discharge line 19 Solenoid Valve 8 HP transducer 20 Sight glass 9 HP switch 21 Filter dryer 10 Scroll Compressor 22 Schradar valve 11 Schradar Valve 23 Shutoff valve 12 Sucti...

Page 32: ...trap Oil storage bend 6 Floor 13 Liquid pipe avoid direct sunlight 7 Condensate drain pipe Figure 2 9 Condenser is Placed Higher than the Compressors during Installation If the condenser is installed...

Page 33: ...Indoor unit 5 Thermal isolated layer under floor 11 Discharge pipe slope 6 Floor Figure 2 10 The Condenser is Placed Lower than the Compressor during Installation The illustration in Figure 2 9 depict...

Page 34: ...Product Dimension The dimensions and operational weight of the indoor units are depicted in Figure 2 11 Figure 2 12 and Table 2 3 respectively In PEX4 series unit installation while lowering the fan t...

Page 35: ...50 1330x995x1975 52 4 x39 2 x77 8 460 P1060 1330x995x1975 52 4 x39 2 x77 8 465 P2070 2430x995x1975 95 7 x39 2 x77 8 750 P2080 2430x995x1975 95 7 x39 2 x77 8 755 P2090 2430x995x1975 95 7 x39 2 x77 8 76...

Page 36: ...dimensions The cut out position and dimensions are shown in Figure 2 13 Figure 2 14 and Figure 2 15 No Description No Description 1 Discharge pipe 22 4 Condensate drain outlet 2 Liquid pipe inlet 16 5...

Page 37: ...Installation No Description No Description 1 Discharge pipe 22 4 Condensate drain outlet 2 Liquid pipe inlet 16 5 Humidification pipe inlet 3 Cable entry 65x25 Figure 2 14 The Position of Pipe Bottom...

Page 38: ...e Position of Cut out Location Dimensions unit mm If it is difficult to connect the pipes from the base plate as per the cable layout the knocking holes on the side plate can also be used for the conn...

Page 39: ...in Table 2 4 respectively Figure 2 16 The Position of Air Outlet on Top Cover Upflow Unit Table 2 4 Dimensions of Air Outlet on Top Cover of Upflow Unit Type A B C mm inch mm inch mm inch Module serie...

Page 40: ...e floor stand according to Figure 2 17 Figure 2 18 No Description No Description 1 400 mm According to the site installer height 550 mm 6 Bottom plate 2 Expansion bolt mounting hole on site customizat...

Page 41: ...e calibrated by horizontal ruler before it is fixed Ensure the floor stand should be lifted enough to make the top surface of the unit absolutely horizontal While designing and installing the downflow...

Page 42: ...pact of noise around the environment the condenser should be installed away from the residential area 15 m Be careful not to damage the building s waterproof layer when installing the condenser on the...

Page 43: ...aporated condensate water pan 3 Hose clamp 2 Condensate drain pipe connection 4 Plug Figure 2 19 Connection of the Drain Pipe of Condensate Water 2 5 2 Humidification Inlet Pipe Connection For the con...

Page 44: ...elow 100 kPa a water tank and pump system should be used No Description No Description 1 Inlet pipe 2 Outlet joint Figure 2 20 Infrared Humidifier Electrode Humidifier Requirements for connecting wate...

Page 45: ...16 16 22 19 16 16 22 22 16 16 22 22 19 16 19 19 16 16 22 19 16 16 30m 22 19 16 16 22 22 16 16 22 22 19 16 25 22 19 16 22 19 16 16 22 19 16 16 40m 22 19 16 16 25 22 19 16 25 22 19 16 25 25 19 19 22 19...

Page 46: ...r piping specification as per IEC 61000 3 12 If the project site uses semi hard or soft copper pipes consult Vertiv technical staff for the selection wall thickness otherwise it leads to system leakag...

Page 47: ...onsult Vertiv local representative for details Notes and instruction labels are pasted onto the base and the side panel close to the ball valve Ensure that the ball valve must be wrapped with a wet cl...

Page 48: ...3 44 Table 2 13 Outdoor Refrigerant Charge Unit kg Outdoor Model LSF52 LSF62 LSF70 LSF76 LSF85 LVC106 LVC140 LVC152 LVC170 Single Circuit Single Circuit Single Circuit Single Circuit Single Circuit Si...

Page 49: ...ct the brazing process The selection placement and fixation of piping system vacuum and filling of refrigerant are required to operate according to industry standards The parameters such as pipeline p...

Page 50: ...as a protective treatment see Figure 2 23 Figure 2 23 Copper Pipe Brazing Protection Diagram 4 After brazing use high pressure nitrogen blowing pipe to remove the internal pipeline residual dust and...

Page 51: ...h hook sling handle winch bracket and a L shaped lifting component No Description No Description 1 Winch bracket 4 Winch 2 Hook 5 Sling 3 Handle Figure 2 24 Fan Elevator Assembly Winch mode Lowering P...

Page 52: ...lifting component to the middle round hole refer Figure 2 26 Adjust the handle until the sling is completely tight 3 Cut off the cable tie that binds the fan cables to ensure that the cable length me...

Page 53: ...olt Figure 2 26 Position of Fixing Bolt 5 Install the fixing bolts as shown in Figure 2 26 with total 4 PCS of bolts holding the arrangement tight during operation No Description No Description 1 Base...

Page 54: ...order and fix them using a cable tie 10 Confirm whether the EC fan has been lowered and installed and ensure that the blade does not touch the fan housing when the fan rotates 2 7 1 Removing Transport...

Page 55: ...vel alarm Do not touch the lamps with bare hands No Description No Description 1 Connect the HWA cable to plug terminal 2 Plug terminal Figure 2 29 High Water Level Detection Float Switch Lever and Te...

Page 56: ...ion fixing plate 2 Electronic humidification 6 Connect the electrode humidifier with drain pipe 3 Removable fixing screw 7 Flip the electrode humidifier as shown 4 Remove transportation fixing screw 8...

Page 57: ...nected and the ball valves of the indoor unit and outdoor unit have been opened completely Condensate pump is installed if required The drain pipe has been connected The water supply pipe for the Infr...

Page 58: ...ame plate for the full load current The cable sizes should meet the local wiring rules Mains supply requirement 380V to 415 V 3 Ph N 50 Hz 60 Hz If the soft power cable uses Y connection and if the ca...

Page 59: ...N and PE respectively to their counterparts of external power supply Reserve some redundancy of the incoming cable and fix the cable to the cable clamp located on the inner side panel of the unit ref...

Page 60: ...4 95 5 113 6 85 6 86 5 P2070D 54 9 73 0 91 2 63 2 66 3 P2080D 58 9 77 1 95 2 67 2 70 4 P2090D 58 9 77 1 95 2 67 2 70 4 P2100D 75 7 93 8 111 9 83 9 87 1 P2110D 75 7 93 8 111 9 83 9 87 1 P2120D 77 4 95...

Page 61: ...sponding anti static measures 2 8 4 Connecting Water Under Floor Sensor Each unit is equipped with a water under floor sensor Connect one end of the sensor to terminal 51 and the other end to the comm...

Page 62: ...h Terminals 37 and 38 Remote alarm Terminals 51 and 24 Water under floor sensor by factory setting 2 8 7 External General Alarm Terminals 75 and 76 can be connected to the external general alarms The...

Page 63: ...he control terminals 70 71 of the indoor unit Wiring of two condensers with single system used to match an indoor unit with dual system The digital signals of dry contact J6 on the condenser board cor...

Page 64: ...external power cable 4 Waterproof joint of pressure sensor cable 2 Waterproof joint of compressor signal 5 Waterproof joint of fan power wire 3 Waterproof joint of spray module cable 6 Waterproof join...

Page 65: ...nstallation Inspection Checklist Items Results The power supply voltage meets the rated voltage on the unit nameplate The system electric loop has no open circuit or short circuit Power cables and gro...

Page 66: ...ronment within the set range 2 It has power down self recovery function such as high and low voltage protection phase loss protection reverse phase protection and other functions 3 The menu operation...

Page 67: ...able 3 1 Table 3 1 Indicator Function Light Function Description Blue The display is starting Yellow The display fails to communicate with the Control Panel or the system shuts down Green System opera...

Page 68: ...ear after the Settings menu icon opens Toggle button left Press the toggle button to switch between the graphical display mode and the list display mode Toggle button right Press this button to switch...

Page 69: ...Vertiv Liebert PEX4 User Manual 59 Controller Operating Instruction Figure 3 3 Color Display Screen Locked Figure 3 4 Color Display Screen Unlocked...

Page 70: ...ting Instruction Figure 3 5 Real time Sensor Data Parameter List Unlocked 3 4 1 Password Interface Press on the Lock icon in the upper right corner of the display the password interface is displayed a...

Page 71: ...ion parameters and modify the first level second level II password three level password is not allowed to be modified For the specific password input procedure refer to Example 1 If incorrect password...

Page 72: ...ontains two pages Alarm Status and Alarm History The current alarm page is used to monitor the current alarm status record of the AC unit indicating no alarm or specific alarm status information Speci...

Page 73: ...ng the Alarm Status Number quantifiable number of history alarms Alarm Serial Number and Alarm Type Alarm Time Start and End Time as shown in Figure 3 9 Figure 3 9 Alarm History Press the Up or Down b...

Page 74: ...e as follows Example 1 Setting the control temperature 1 Temperature Setting item press the position number the interface appears as shown in Figure 3 11 2 In the interface enter the corresponding tem...

Page 75: ...se the Humidity Setting will keep the original parameters Figure 3 11 Temperature Setting Example 3 Control Mode Settings 1 Control Mode item Press the drop down button next to the box 2 Select the ap...

Page 76: ...verage automatically Do not change the default values of the initial settings It is recommended to change the settings only under the guidance of qualified service professional Alarm Setting Parameter...

Page 77: ...value needs to be modified within the upper and lower limits Teamwork Settings Press the Parameter Setting in the menu to enter the parameter settings page Press the Teamwork Setting to modify the te...

Page 78: ...then parameters can be set according to maximum and minimum values of airflow pressure on the keyboard Figure 3 16 External Static Pressure Settings Display Settings Press the Display Setting icon int...

Page 79: ...e 3 18 Press to start the password box keyboard will pop up then enter the start password if the password is correct then set the start pop up box can be used and if the password is wrong set the pop...

Page 80: ...mperature and humidity limit temperature set on the keyboard Temperature and Humidity Curves Press the menu button then press the temperature and humidity to view the temperature and humidity curve gr...

Page 81: ...ebert PEX4 User Manual 71 Controller Operating Instruction 3 5 2 Power Information Display Figure 3 22 Power Information Display 3 6 Hardware and Software Information Figure 3 23 Hardware Software Inf...

Page 82: ...de Liebert PEX4 inverter air conditioner series supports a variety of monitoring methods Modbus RTU Modbus Remote Terminal Unit RTU communication protocol over a RS 485 serial network also known as Mo...

Page 83: ...The controller features a diagnostic function that enables the user to manually turn On Off the components on site to check if the components are working normally 4 2 Electrical Connection Inspection...

Page 84: ...he input connection between control interface board and fan overload protector high pressure switch heating over temperature protection switch humidifier protection switches discharge air temperature...

Page 85: ...cables ensure that the power supply of the control unit has been disconnected Do not use the water detection sensor adjacent to flammable liquid or use it to detect flammable liquid 4 5 Air Filter Th...

Page 86: ...may end up damaging caused by the fan operation 4 7 Infrared Humidifier During the normal operation of the infrared humidifier sediment such as mineral particles will accumulate on its water pan To e...

Page 87: ...maintenance of the electric heater 1 Check the electrical heater for rust Use an iron brush to remove the rust if possible or replace it if the rustiness is immense or if there is some damage 2 When...

Page 88: ...Because component failure is usually accompanied by their corresponding faults regular checking is an imperative function to implement in order to avoid most system failures 3 Inlet and outlet water p...

Page 89: ...if the fan MCB is closed When the MCB is closed check if the phase voltage is normal Control board failure Check if the output percentage of fans are 0 If not check terminal J64 1 Bay unit or termina...

Page 90: ...by checking the resistance of its resistor Contactor closed no heating effect Main power failure of heater Check if the air switch heating system is closed or not If the contactor is closed check hea...

Page 91: ...the compressor windings are open If open wait for its automatic reset after cools down Detecting the discharge gas temperature sensor Check if there is high discharge temperature alarm or low dischar...

Page 92: ...hen replace the contactor If there is no 24 Vdc between A1 and A2 then check whether there is 24 Vdc between J18 3 system 1 or J20 1 system 2 and terminal G If there is then replace the compressor del...

Page 93: ...air flow system Condensing pressure is too low Check the condenser system External static pressure is large leading to air flow attenuation Check the air flow duct or re evaluate external static press...

Page 94: ...infrared humidifier Water pan over temperature protection switch and lamp over temperature protection switch Check the voltage between terminal J18 2 and G on terminal row If it is 24 V then check the...

Page 95: ...d to are trade names trademarks or registered trademarks of their respective owners While every precaution has been taken to ensure accuracy and completeness herein Vertiv assumes no responsibility an...

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