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Vertiv | Liebert PEX+ Chilled Water | User Manual

System Operation and Maintenance

7.10. Water Flow Control Valve

The water flow control valve adjusts the valve position by collecting the cooling requirement, to control the water

flow through the heat exchanger coil. The higher the load is, the more water flow is required to flow through the

evaporator coil. The water flow control valve is composed of a regulator body, connector (some of the units may

not have a connector, please pay attention to the actual instance) and actuator. User should select the two way

valve or the three way valve depending on the application situation, as shown in

Figure 7-4

No. Description

No.

Description

Actuator

Connector

Regulator body

Actuator

Figure 7-4 Water Flow Control Valve

Summary of Contents for Liebert PEX+ Series

Page 1: ...Liebert PEX Chilled Water Series User Manual Precision Air Conditioning ...

Page 2: ... the purchasing scope or the usage scope Unless otherwise specified in the contract all statements information and recommendations in this document are provided AS IS without warranties guarantees or representations of any kind either express or implied The information in this document is subject to change without notice Every effort has been made in the preparation of this document to ensure the ...

Page 3: ...e following 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 instructions that need to be adhered to failing which may result in danger and safety issues thereby having an adverse effect on the reliabil ity of the device and security Even for practices not r...

Page 4: ...cess 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 parts and remote control The panel key supplied along with the unit must be kept by the personnel responsible for the maintenance The protective covers can be removed after the electric power has been ...

Page 5: ...age both 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 appropriate and fault free Failure to comply with these norms will result in water leakage from the unit Water leakage can lead to massive damage and loss of critical equipment in the hosting eco...

Page 6: ...5 Water Flow Regulating Valve 7 1 4 6 Safety Controlling Device 7 1 4 7 Cooling Coil 7 1 4 8 Filter 7 1 4 9 Water Leak Detecting System 8 1 4 10 iCOM Controller 8 1 5 Optional Components 9 1 6 Storage Operating Environment Requirements 11 1 7 Noise Level Limits 12 Chapter 2 Installation 13 2 1 Pre installation 13 2 1 1 Transportation Movement 13 2 1 2 Unpacking 14 2 1 3 Inspection 16 2 2 Installat...

Page 7: ...r Installation 28 2 4 5 Installation of Indoor Unit 31 2 4 6 Pipe Installation Unit 31 2 4 7 Condensed Drain Piping Connection of Indoor Unit 31 2 4 8 Water Inlet Pipe Humidifier Connection 32 2 4 9 Chilled Water Inlet and Outlet Piping Connection 34 2 5 Lowering the Fan 36 2 5 1 Removing Fastener and Vibration Absorber 39 2 5 2 Removing of Fasteners of Infrared Humidifier 39 2 6 Installation Insp...

Page 8: ...s 62 4 8 Event Name and Definition 62 4 9 Multi units and Teamwork Modes 65 4 10 Teamwork Modes 66 4 10 1 Application of Teamwork Modes 66 4 10 2 Standby Rotation 69 4 10 3 Standby and Cascade 70 Chapter 5 Application of INTELLI SLOT 71 5 1 Introduction of Host Communication Card 71 5 2 Installing Host Communication Card 72 5 2 1 Installing communication card 72 5 2 2 Connection 72 5 2 3 Assigning...

Page 9: ...85 6 3 Inspection after Commissioning 86 Chapter 7 System Operation and Maintenance 87 7 1 Routine Maintenance Inspection Items Monthly 87 7 2 Routine Maintenance Inspection Items Semi Annual 88 7 3 Self Diagnostic System 88 7 4 Check the Electrical Connections and Maintenance 88 7 5 Appearance Inspection and Maintenance of Controller Components 89 7 6 Filter Maintenance Guide 90 7 7 Fan 92 7 8 In...

Page 10: ... Manual v Table of Contents 8 2 1 Infrared Humidifier Troubleshooting 96 8 3 Refrigeration System Fault Diagnosis and Treatment 96 8 4 Heating System Fault Diagnosis and Treatment 97 Appendix I Content of Harmful Substances in Products 98 ...

Page 11: ...ar ecosystems wherein optimum cooling is required along with a high degree of reliability and variability It addresses the needs and challenges associated with such critical applications and setups It caters to sensitive applications which need a suitable environment for optimal performance Therefore care should be taken while testing these sensitive products or maintaining a favorable environment...

Page 12: ... This chapter introduces the model appearance components optional configuration and refrigerant requirements of Liebert PEX The appearance of Liebert PEX Chilled Water Series Precision Air Conditioner PEX CW for short hereafter is shown in Figure 1 1 Figure 1 1 Liebert PEX Series Model ...

Page 13: ...y kW Digit 18 Installation Option Digit 6 Air Discharge 0 None Standard Pipe No Low Ambient Kit U Upflow H Re heat Humidity Lockout D Downflow Digit 19 Monitoring Digit 7 System Type 0 None C Chilled Water 7 Unity Card Digit 8 Airflow 8 Unity Card 2 1 EC Plug Fan Digit 20 Sensors Digit 9 Power Supply 0 None C 208 V 3 Ph 60 Hz A Supply Air Pressure Sensor D 230 V 3 Ph 60 Hz S Smoke Sensor A 460 V 3...

Page 14: ...ne 1 SFA Included H CW Coil High Pressure MBV The standard components are represented in Bold Italic font in Table 1 1 1 4 Components of PEX CW Model An overview of the main components optional components and features of the Liebert PEX CW is mentioned in this section Liebert PEX CW components include indoor unit outdoor unit and remote monitoring software Figure 1 2 shows main components of PEX m...

Page 15: ...rt PEX CW models are energy efficient and innovative with integrated electronics and a maintenance free design Ability to regulate the airflow and reduce the fan input power leading to high energy efficiency Easy to connect facility with minimum wiring leading to a high performance with a great variety of possible airflow rates Figure 1 3 EC Fan 1 4 3 Infrared Humidifier The infrared humidifier co...

Page 16: ...aster heating rate uniform heating safety and reliability The material used in PTC electrical heating for heating purpose are ceramic element and aluminum pipe These electrical heaters features lower running temperatures less susceptible to overheating and long lasting due to less wear thereby ensuring operational safety and lower maintenance and smooth operation Figure 1 5 Electrical Heater ...

Page 17: ...switch and high water level alarm switch When there is dry burning and the temperature is too high the power of the humidifier can be automatically disconnected to protect the humidifier from the damage 1 4 7 Cooling Coil Liebert PEX CW series is equipped with a fin tube copper cooling coil which provides high efficiency high Sensible Heat Ratio SHR and low air side pressure drop The coil is a con...

Page 18: ...lligence The front door of the chilled water PAC unit is facilitated with a display and operating panel This interface enables the operators to easily monitor observe and deal with issues triggered during operation in time The iCOM controlling system also supports the multi units and teamwork mode There are two types of display options Large display with 480x480 pixels and standard Small display w...

Page 19: ...o the setpoints 1 Water Alarm Shuts Unit Down 2 Water Alarm Shuts Hum Down Smoke Detectors Smoke detection system facilitates the data center to detect smoke in the unique air flow environment The equipment room is outfitted with hot and cold aisles underfloor and overhead spaces each separated to contain airflow within the space The active smoke detection technique triggers an alarm with the firs...

Page 20: ...e water flow in the system and also adapts as per more environmental requirements Supply Air Pressure Sensor Supply Air Pressure Sensor is only used for downflow units It detects the static pressure under the floor of equipment room The controller can read the values of static pressure Dual Power Supply Parallel In dual power supply parallel there are two power sources main and backup that can be ...

Page 21: ... the system needs to be re calibrated Table 1 3 Operating Environment Requirements Item Requirement Ambient temperature Indoor temperature 18 ºC to 40 ºC Outdoor Chilled Water Chilled water supply temperature min 5 C max 20 C Chilled water pressure max 16bar Protection level cooling unit IP20 Altitude 1000 m derating is required when located altitude is above 1000 m Operation voltage range 380 V 1...

Page 22: ...l Limits Under the airflow free return circumstance the sound pressure level is less than 70 dB for all models Figure 1 9 and Figure 1 10 provide the noise level measuring points of the unit Figure 1 9 Noise Level Measurement Top View Figure 1 10 Noise Level Measurement Side View ...

Page 23: ...are highly recommended Liebert PEX unit is heavy it is recommended to use the mechanical equipment like electrical forklift to move the unit Move the equipment to the location near the installation site If an electric forklift is used insert the tines of the forklift below the pallet as illustrated in Figure 2 1 Figure 2 1 shows how the forklift tines are inserted underneath the pallet and shows i...

Page 24: ...acking 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 plastic finally remove the Honey Comb Paper Board For better understanding see Figure 2 3 No Description No Description 1 Top Cover 3 Honey Comb Paper Board 2 Remove Top Cover 4 Remove sealing plastic film and Honey Comb Paper Board Figure 2 3 Re...

Page 25: ...ing the Hook Firstly straighten all the hooks that hold side panel I and remove side panel I Then straighten all the hooks that hold side panel II and remove side panel II At last remove top cover III as shown in Figure 2 5 Figure 2 5 Removing Side Panel and Top Cover Remove the Base Pallet The unit is fixed onto the base pallet with M8 70 screw as shown in Figure 2 6 Use a 17 mm open end spanner ...

Page 26: ...vorable environment for equipment rooms computer rooms and similar ecosystems Strict adherence to the installation procedures is mandatory to ensure that the air conditioner is installed properly 2 2 1 Equipment Room Requirements Before installation the equipment room must be prepared to ensure a smooth operating flow and to achieve the expected results The equipment room must meet the standards t...

Page 27: ...ents However if these requirements are not met Vertiv suggests that rectifications to be made on the site in order to comply with the specified requirements and conditions However if the rectifications or modifications 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 ins...

Page 28: ...ation 2 2 3 Maintenance Space Requirement When installing the unit a minimum maintenance space of 900 mm must be reserved in front of the air conditioning unit The requirement for maintenance space is shown in Figure 2 7 Figure 2 7 Maintenance Space of Unit ...

Page 29: ...ladder Forklift 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 tube Insulated torque wrench Torque screwdriver Multi meter Clip on ammeter The tools mentioned in Table 2 1 are generic and commonplace however depending on various factors such as site envi...

Page 30: ... that the tools used in the installation operation and maintenance processes are well insulated 2 2 5 System Arrangement during Installation Figure 2 8 shows the piping connection of indoor and outdoor units of the chilled water series PAC Figure 2 8 System Arrangement ...

Page 31: ...ended for proper circuit operation and maintenance After the installation exhaust the PAC unit before filling water to ensure the efficiency of the coil In winter the PAC unit does not operate for a long term empty the water in PAC unit to protect the heat exchanger from frost cracking 2 3 Mechanical Installation 2 3 1 Indoor Unit Size and Weight Product Dimension The dimensions and operational we...

Page 32: ... 1680 995 1975 66 1 39 2 77 7 490 P2080 1680 995 1975 66 1 39 2 77 7 500 P2090 1680 995 1975 66 1 39 2 77 7 510 P2100 1680 995 1975 66 1 39 2 77 7 520 P2110 1830 995 1975 72 0 39 2 77 7 540 P2120 1830 995 1975 72 0 39 2 77 7 550 P2130 1830 995 1975 72 0 39 2 77 7 560 P2140 1830 995 1975 72 0 39 2 77 7 580 P3150 2505 995 1975 98 6 39 2 77 7 770 P3160 2730 995 1975 107 5 39 2 77 7 790 P3170 2730 995...

Page 33: ... cut out of the all models of PEX CW upflow units are shown in Figure 2 11 and in Table 2 4 respectively Figure 2 11 The Position of Cut out Upflow Unit Table 2 3 Dimensions of Air Outlet on Top Cover of Upflow Unit inch mm Types of Model A B mm mm P1030 P1060 850 850 P2070 P2100 1600 850 P2110 P2140 1750 850 P3150 2425 850 P3160 P3200 2650 850 ...

Page 34: ...n and dimensions of air outlet on the top cover of downflow unit are shown in Figure 2 12 and in Table 2 5 respectively Sym Description Sym Description P Power cable entry D Drain pipe hole H Water inlet for humidifier CI CO Chilled water inlet and outlet Figure 2 12 The Position of Air Outlet on Top Cover Upflow Unit ...

Page 35: ...04 290 105 205 85 35 35 56 110 110 P3160 182 887 779 404 290 105 205 85 35 35 56 110 110 P3170 P3200 167 874 792 404 290 108 192 88 35 35 56 110 110 2 4 2 Side Panel Knock out Location If it is difficult to route piping and cabling from the base then route the connection from side panel The locations and dimensions of knock out holes are shown in Figure 2 13 and Figure 2 14 Select the inlet and ou...

Page 36: ...ption No Description 1 2 Ø52 Knock out hole 3 3 Ø110 Knock out hole 2 6 Ø35 Knock out hole Figure 2 14 Knock out Holes on Side Panel of the Downflow Unit unit mm The unit has knock outs on the panels ensure to mount sleeve to the cable holes to avoid cutting of the cables ...

Page 37: ...on for Liebert PEX CW series upflow units as per one two and three bays as shown in Figure 2 15 Figure 2 16 Figure 2 17 and in Table 2 6 respectively Figure 2 15 Plenum Dimensions of P1030 and P1060 Upflow Unit Figure 2 16 Plenum Dimensions of P2070 toP2140 Upflow Unit Figure 2 17 Plenum Dimensions of P3160 to P3200 Upflow Unit ...

Page 38: ...an 600 mm then consult Vertiv local representative for more details on non standard production 2 4 4 Indoor Installation Mounting Floor Stand The mounting floor stand is to be prepared by the installation team according to the dimensions weight and height of the unit to ensure that the structure is rigid the floor stand should be sized according to the number of bays in the unit model as shown in ...

Page 39: ...o Description 1 6 Ø14 hole 3 Bottom rubber cushion 2 Bottom rubber cushion 6PCS Figure 2 19 Mounting Floor Stand of Two Bay Series No Description No Description 1 8 Ø14 hole 3 Bottom rubber cushion 2 Bottom rubber cushion 4PCS Figure 2 20 Mounting Floor Stand of Three Bay Series ...

Page 40: ...or the downflow unit the base must be greater than the height of 400 mm For the upflow unit the base height must be about 200 mm The side panels are suspended to the frame of the unit ensure that floor stand should bear the weight of the panels The distance between the obstacles that may obstruct the air supply around the upper edge of the base and the outer edge of the EC fan shall be greater tha...

Page 41: ...s follows Condensed drain piping connection of the indoor unit Water inlet pipe of humidifier connection Chilled Water inlet and outlet piping connection 2 4 7 Condensed Drain Piping Connection of Indoor Unit The condensate of Infrared humidifier and evaporator coil are connected by a cross connector and drained through the drain pipe as shown in Figure 2 21 the material used for the drain pipe is...

Page 42: ...n isolation valve should be fitted to the water inlet pipe Ensure that the water inlet pipe is sealed properly to prevent leakage The Infrared humidifier reserved a copper pipe OD 6 35 mm There is a 1 4 copper nut at the end of copper pipe and the 1 4 1 2 conversion copper thread connector to avoid loose connection as shown in Figure 2 22 Where the main pipe pressure may exceed 700 kPa the main pi...

Page 43: ... the water inlet pipe of electrode humidifier Water inlet pipe uses 3 4 G screw threaded connection pipe Water filter and water quality detection are recommended to prevent the water quality from affecting the normal operation of the humidifier refer Figure 2 23 for better understanding No Description No Description 1 Water inlet pipe OD 6 35 mm 2 Water outlet joint Figure 2 23 Water Inlet Pipe of...

Page 44: ...urces during maintenance One of the isolation valves can be a balancing valve Chilled water system with a balancing valve would be more efficient and more accurate in controlling water distribution Water pressure should be sufficient to overcome the water pressure drop caused by all the components of the water system Considering the possibility that water pressure drop would increase due to deposi...

Page 45: ...Water supply pipe 2 Water return pipe Figure 2 25 Connection of Chilled Water Supply and Return Pipes downflow units Table 2 8 Male Screw of Chilled Water In and Out Pipes Model Male Screw of Chilled Water In Out Pipes inch P1030 P1050 R1 1 4 P1060 P2080 R1 1 2 P2090 P2140 R2 P3150 P3200 R2 1 2 ...

Page 46: ...n Open the unit maintenance cover check the fixing bolts refer total two PCS of the L shaped lifting component to ensure that it is fixed properly and then install the fixing bolts total four PCS of the winch bracket as shown in Figure 2 27 2 Turn the winch handle and use the winch hook to hook the L shaped lifting component to the middle round hole refer Figure 2 28 Adjust the handle until the sl...

Page 47: ...ption 1 L shaped beam 4 Winch handle 2 Fan 5 Fixing bolt 3 Winch Figure 2 27 Installed Winch Bracket No Description 1 Bolt Figure 2 28 Position of Fixing Bolt 5 Install the fixing bolts as shown in Figure 2 28 and hold the arrangement tight during operation with total four PCS of bolts ...

Page 48: ... the L shaped lifting component At this point the operation of lowering the fan of the one bay unit is complete For the unit with two fans lower the other fan too using the fan elevator assembly The requirements are as follows 8 Repeat steps 1 7 of the one bay unit to lower the other fan 9 After lowering all fans arrange the fan cables in the correct order and fix them using a cable tie 10 Confirm...

Page 49: ... humidifier high water level switch is tightly bound together with a rubber string before delivery as shown in Figure 2 30 Remove the rubber string before the unit operation Otherwise the unit will not be able to detect the high water level alarm The sheet metal cover of the high water level switch should be reinstalled in the original position after removing the rubber string Otherwise it will pr...

Page 50: ...has been installed if required The drain pipe has been connected The water supply pipe for the Infrared humidifier has been connected All pipe joints are tightened Fasteners for transportation have been removed Irrelevant things such as transportation material structure material and tools inside or around the equipment have been cleared after the equipment is installed The airflow distribution sys...

Page 51: ... the cable is damaged it must be replaced only by professional service personnel Before the wiring use a voltmeter to measure the power supply voltage and ensure that the power supply is switched off The applicable grid for this air conditioner TN TT star connection power system consult Vertiv local representative for other connections details A breaker device must be provided to disconnect the un...

Page 52: ...led Water User Manual 42 Electrical Installation No Description 1 Cable clamp Figure 3 1 Location of Electrical Control Box Upflow unit No Description 1 Cable clamp Figure 3 2 Location of Electrical Control Box Downflow unit ...

Page 53: ...able of Indoor Unit Figure 3 4 shows the details of power connectors in electrical control box connects terminals L1 L3 N and PE respec tively to 3 phase 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 refer Figure 3 3 For cable specification and the rated Full Load Ampere FLA in the Table 3 1 Figu...

Page 54: ...5 P1060 5 5 15 5 25 5 10 9 11 6 P2070 10 8 25 9 40 9 21 6 23 0 P2080 10 8 25 9 40 9 21 6 23 0 P2090 10 8 25 9 40 9 21 6 23 0 P2100 10 8 25 9 40 9 21 6 23 0 P2110 11 0 26 1 41 1 21 8 23 2 P2120 11 0 26 1 41 1 21 8 23 2 P2130 11 0 26 1 41 1 21 8 23 2 P2140 11 0 26 1 41 1 21 8 23 2 P3150 16 2 36 2 56 2 27 0 28 4 P3160 16 2 36 2 56 2 27 0 28 4 P3170 16 5 36 5 56 5 27 3 28 7 P3180 16 5 36 5 56 5 27 3 2...

Page 55: ... 38 shorted remove upon remote shutdown 6 Customized alarm terminal 24 is the common terminal Figure 3 5 Enlarged View of Terminal Block Anti static measures should be taken before connecting the control cables 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 common Terminal 24 The number...

Page 56: ... will be shorted At this point the air conditioner system will generate an audible alarm and the iCOM controller LCD will display the alarm information Terminal 50 and Terminal 24 Remote alarm optional Terminals 51 and Terminal 24 Water sensor by default Terminals 55 and Terminal 24 Setting safe switch for condensation water pump optional CPSS When the CPSS is configured in the unit then connect o...

Page 57: ...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 and indoor 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 Control transformer setting matches the incoming power Do not power On the ...

Page 58: ...atures are as follows Easy operation interface multiple password protection to prevent unauthorized operation Liebert iCOM has the restoration on a power down and high low voltage protection functions Displays the operating time of important components through menu operation screen Expert class malfunction diagnosis system can automatically display the present malfunction information to facilitate...

Page 59: ...n the back light turns off until any one button of the panel is pressed 4 2 Button and Indicator Panel Nine buttons and two indicators are located on the button indicator panel as shown in Figure 4 1 Including Indicators alarm indicator and operation indicator Buttons ON OFF button Enter button ESC button Up button Down button Left button Right button Alarm silence button and Help button No Descri...

Page 60: ...eter by pressing the direction button the menu and the parameter is high lighted Test the display of characters When the system is in the test state press the Enter button that will display the ASCII code This function is used to test whether the characters are displayed normally on the LCD ESC button Quit the current menu Cancel the current change of parameters Test the LCD high light Press the E...

Page 61: ...he current alarm after the alarm sound is silenced Test the alarm indicator and rest the LCD contrast and buzzer frequency Press the alarm silence button when the system is in the test state to switch the alarm indicator between on and off It can test whether the alarm indicator is normal Meanwhile reset the LCD contrast to 100 and buzzer frequency to 0 Help button Display the online help Test the...

Page 62: ...intenance status The main interface has two display modes Graphical and Simple The difference between these two display modes is that the graphical interface see Figure 4 3 displays the percentage output chart of the function components while the simple interface see Figure 4 4 displays only the icons of current operation mode only The switching of two modes can be realized by operating the menu F...

Page 63: ...Icon Definition Icon Definition Fan running Free cooling Cooling Maintenance Hot water heating Dehumidifying Electrical heating Humidifying 4 5 User Menus Press the enter or down button on the main interface to enter the User Menus as shown in Figure 4 5 The User Menus are displayed in six pages each displaying one or two submenus Press the Enter button to highlight the submenu the Up or Down butt...

Page 64: ...ault Setting range Description U102 TEMP SET 23 C 5 C to 40 C Temperature Setpoint TEMP ACT 23 C 0 C to 45 C Temperature Setpoint Act U103 TEMP SENS 2 Return Sensor 0 SUP 1 REM 2 RET Temperature Control Sensor U104 HUM SET 50 20 to 80 Humidity Setpoint 8 9 C 5 0 C to18 3 C Dew Point Setpoint U105 HUM SENS 2 Return Sensor 1 REM 2 RET Humidity Control Sensor U106 HUM CTRL 2 Predictive 0 Rel 1 Comp 2...

Page 65: ...vent type shows Message the LCD will display the event name only When the event type shows Warning the LCD will display the event name and the alarm indicator turns red When the event type shows Alarm the LCD will display the event name the alarm indicator will turn red and an audible alarm will be raised 4 5 4 Graphics The GRAPHICS menu provides two types of graphs COOLING CONTROL TEMPERATURE CON...

Page 66: ... password Press the enter button to highlight the parameters use the up or down button to select a parameter Then press Enter button again to enter the parameter and use the up or down button to set the value Press the Enter button to finally save the change Table 4 5 Time Range Time Range Time Indicated by Each Pixel Time Range Time Indicated by Each Pixel 8min 6s 2d 36min 32min 24s 4d 72min 1hr ...

Page 67: ...al Sensor High Temperature Alarm U215 LO SUP T 10 0 C 1 0 99 0 C Internal Sensor Low Temperature Alarm U219 REM SNSR 0 Disabled 0 No 1 Com 2 Sep Remote Sensor Alarms U220 HI REM 32 3 C 1 0 99 0 C High Remote Temperature U220 LO REM 12 8 C 1 0 99 0 C Low Remote Temperature U224 HIREM 01 32 3 C 1 0 99 0 C High Remote Temperature 01 U224 LOREM 01 12 8 C 1 0 99 0 C Low Remote Temperature 01 U225 HIREM...

Page 68: ...50 Pa SP Transducer High Range Pa U241 LO RANG 0 Pa 0 348 Pa SP Transducer Low Range Pa To browse through the menu press the enter button to highlight the option and use the up or down button to scroll Password is required for changing the setpoints Then enter the SET ALARMS menu press the enter button to highlight the option use the up or down button to browse the submenu Press the enter button t...

Page 69: ... C 0 F 1 C Temperature indication U405 CONTRAST 50 From 0 to 100 Display contract U406 BUZ FREQ 50 From 0 to 100 Buzzer frequency 0 means buzzer silenced U406 BUZ TEST 0 Off 0 Off 1 On Buzzer frequency test switch It determines whether or not there will be sound accompanying the adjustment of BUZ FREQ through the setting U407 BACKLITE 1 5min 1 5 m 2 10 m 3 30 m 4 1 h 5 12 h Backlight time or the b...

Page 70: ...2 MOTOR S 6 digits Total Run Hours Fan Motor DINT U502 LIMIT 32000 0 32001 Run Hours Threshold Fan Motor U505 CW 6 digits Total Run Hours Chilled Water DINT U505 LIMIT 32000 0 32001 Run Hours Threshold Chilled Water U508 EL HEAT1 6 digits Total Run Hours El Heater 1 DINT U508 LIMIT 32000 0 32001 Run Hours Threshold El Heater 1 U509 EL HEAT2 6 digits Total Run Hours El Heater 2 DINT U509 LIMIT 3200...

Page 71: ... No 0 No 1 Yes Sleep on Wednesday U604 THU 0 No 0 No 1 Yes Sleep on Thursday U604 FRI 0 No 0 No 1 Yes Sleep on Friday U604 SAT 0 No 0 No 1 Yes Sleep on Saturday U604 SUN 0 No 0 No 1 Yes Sleep on Sunday U606 START 1 0 Time hh Sleep 1 from hour 0 Time mm Sleep 1 from minute STOP 1 0 Time hh Sleep 1 to hour 0 Time mm Sleep 1 to minute U608 START 2 0 Time hh Sleep 2 from hour 0 Time mm Sleep 2 from mi...

Page 72: ... HIGH TEMPERATURE High temperature alarm LOSS OF AIR BLOWER 1 Loss of air blower 1 HIGH ROOM TEMP High room temperature LOW ROOM TEMP Low room temperature HIGH ROOM HUM High room humidity LOW ROOM HUM Low room humidity HIGH TEMP SENSOR A High temperature of sensor A LOW TEMP SENSOR A Low temperature of sensor A HIGH HUM SENSOR A High humidity of sensor A LOW HUM SENSOR A Low humidity of sensor A U...

Page 73: ... Remote Sensor Average Temperature is below the threshold REM SENS AVG HI TEMP The Local Unit Remote Sensor Average Temperature is above the threshold REM SENS SYS LO TEMP The System Remote Sensor Average Temperature is below the threshold REM SENS SYS HI TEMP The System Remote Sensor Average Temperature is above the threshold DISPLAY OFF DISABLED The display off button was set disabled but somebo...

Page 74: ...connected or reports in valid on at least one lead OFF BY REMOTE SWITCH The Unit was shut down by means of the Remote On Off digital input MANUAL MODE ON The Unit was started in Manual Mode OFF BY LOCAL SWITCH The Unit was shut down by means of the external switch connected to the HCS12 or 3Digits Display OFF BY DISPLAY The Unit was shut down by means of the Display On Off button OFF BY BMS The Un...

Page 75: ... Ethernet network through a CAT5 cable as shown in Figure 4 8 Up to 32 units control boards and up to 32 graphic displays can be connected together by using the Global Bus Protocol The two units two control boards or one control board and one large graphic display can be directly connected through a crossed Ethernet cable and multiple units can be interconnected in a networking with the help of a ...

Page 76: ...rk Mode 2 Teamwork Mode 3 All Liebert iCOM controlled cooling units in a network must be set to run in the same teamwork mode 4 10 1 Application of Teamwork Modes No Teamwork Multiple zones in one room All cooling units work independently responding to their own sensors Standby function and unit rotation are possible but cascading is not possible refer Section 4 10 3 Standby and Cascade Auto set w...

Page 77: ...eviates from the setpoints The number of available units is calculated like In non standby configuration all units with fan On In typical standby function no cascade all units with fan On In cascade mode all units that could operate no alarm which forces the unit to switch off unit not switched off etc Figure 4 10 shows how two cooling units work together in Teamwork Mode 1 Since Unit 1 and Unit 2...

Page 78: ...mart Aisle Control mode and have been connected in a unit to unit network Teamwork provides coordination between the units to prevent the fighting among th units in the network by not allowing units to operate in conflicting modes at the same time This conflict may arise due to mode selection based on the average of the collective unit sensors Cooling vs Heating and Humidifying vs Dehumidifying Te...

Page 79: ...next unit has an alarm the next standby unit will be started If no more standby units are available the unit with a non critical alarm that permits unit operation will be switched On again water detection fan alarm fire alarm etc will not permit unit restarting The standby function can be rotated daily setting the time weekly setting the day of the week and time or monthly setting the first weekda...

Page 80: ... based on the local supply deviation Fan proportional band number of connected units The standby unit will remain On for the time set in the parameter The default is 30 minutes the range is from 2 to 360 minutes Standby units will start if an alarm occurs in one of the operational units If the standby units are cascaded or in Teamwork Mode 3 they will also start and work with the regular operation...

Page 81: ...ication card 5 1 Introduction of Host Communication Card Liebert PEX CW has a IS UNITY card which supports two kinds communication protocol IS 485 and IS WEB shown in the Figure 5 1 No Description No Description 1 RJ 45 Ethernet HTTP Modbus TCP BACnet IP SNMPv1 v2e v3 Vertiv protocol 4 Micro USB AB Future release 2 Liebert sensor network Future release 5 BACnet MSTP Modbus RTU YDN23 3 Reset button...

Page 82: ...guration insert the communication card into the installation box 1 and fixed the screws as shown in Figure 5 2 No Description No Description 1 Intelli Slot 1 3 Intelli Slot 2 2 Communication card Figure 5 2 IS UNITY Card Location 5 2 2 Connection The electrical schematic figure of the host communication configuration is shown in Figure 4 3 P61 P65 and P66 cables are connected in the factory Theref...

Page 83: ... is factory configured for DHCP If user requires a Static or Boot network configuration ensure to change the Boot Mode as described in Static IP Connect a RJ 45 cable to the card and it will receive an IP address from the DHCP server Contact the DHCP administrator to obtain the IP address using Liebert IntelliSlot Unity card s MAC address The MAC address is printed on the card faceplate If the DHC...

Page 84: ...king The table of information shows the last IP address assigned by the DHCP server The card may retain that IP address when it reconnects to the DHCP network because most DHCP systems reuse the same IP address for the same device Figure 5 4 IS UNITY DP Card Connection Port No Description No Description 1 Unity Tab 3 Last DHCP 2 Support Active networking Figure 5 5 Example of IS UNITY DP Card Web ...

Page 85: ...en a new Command Prompt and type ipconfig renew and press Enter This forces the computer to acquire the auto configuration IPv4 address 4 When the computer has the auto configuration IPv4 address then open a browser window on the computer and type 169 254 24 7 the card s default Auto configuration IPv4 Address in the URL address field The card s Web page appears 5 2 5 Connect a RS 485 Serial Cable...

Page 86: ... the IP Web communication interface serial RS 485 communication interface or both The default for IP Web communication is IPv4 which can be changed to IPv6 for greater security contact the nearest network administrator to determine whether it is compatible with the network To choose the communication interface refer to Figure 4 7 1 Select Unity Tab Configuration Network Settings 2 Enable the proto...

Page 87: ...and third party systems over the following protocols BACnet IP BACnet MSTP Modbus TCP Modbus RTU SNMP YDN23 Any two of the protocols can be enabled on one card Only one version of BACnet can be selected either BACnet IP or BACnet MSTP Only one version of Modbus can be selected either Modbus TCP or Modbus RTU Only one of the protocols can use the 485 port choosing two 485 protocols will cause confl...

Page 88: ...ired protocol To enable two communication protocols 1 Select Unity Tab Protocols 2 Click on Edit and enter the administrator user name and password 3 Put a check mark in the desired protocols Only two may be enabled Only one of the two can use the 485 port 4 Click Save to confirm the changes or click on Cancel to discard them 5 Configure the protocols selected 6 Restart the card Select Unity Tab S...

Page 89: ... 3 3 Configure Modbus TCP 1 Select the Unity Tab Protocols Modbus TCP 2 Click on Edit and enter a User name and password if required 3 Set the Limit Network Access Type by choosing from the drop down list Open Same Subnet Trusted IP List 4 Enter the port to be used by the Modbus Server to listen for and respond to Modbus protocol requests based on limit Network Access Type setting 5 Enter the Maxi...

Page 90: ...BACnet Protocol Contact the system administrator or building management system administrator if any ambiguity is faced about the settings 1 Select Unity Tab Protocols BACnet 2 Click on Edit and enter a user name and password if required 3 Enter the Managed Device Write Access level Read Only or Read Write This determines a user s ability to change settings in the Liebert IntelliSlot Unity card 4 C...

Page 91: ...nity Tab Protocols BACnet IP 2 Click on Edit and enter a User name and password if required 3 Set the BACnetIP Port Number 4 If the Liebert IntelliSlot Unity card is on a different subnet a possibility when the monitored units are part of a Liebert SiteScan network or other third party monitoring service Choose whether to enable Register as Foreign Device Enter the IP address of the BBMD BACnet Br...

Page 92: ...al 82 Application of INTELLI SLOT 5 Click Save to confirm the changes or click on Cancel to discard them 6 Restart the card to activate the changes Select the Unity Tab Support Enable the commands Click on Restart Figure 5 10 BACnet IP settings ...

Page 93: ...s BACnet MSTP 2 Click on Edit and enter a user name and password if required 3 Set the BACnet MSTP Node ID The ID default is 1 4 Set the BACnet MSTP Data Rate 5 Set the BACnet MSTP Max Master Address 6 Set the BACnet MSTP Max Info Frames The default is 8 7 Click Save to confirm the changes or click on Cancel to discard them 8 Restart the card to activate the changes Select Unity Tab Support Enable...

Page 94: ...r a User name and password if required 3 To enable Authentication Traps put a check mark in the box 4 To change the Heartbeat Trap Interval choose a time from the drop down list or choose Disabled to prevent any heartbeat traps from being sent 5 The interval times offered are 5 minutes 30 minutes or 1 4 8 12 or 24 hours 6 Choose whether to disable the traps or to set the interval to one of the per...

Page 95: ...of leakage 6 Ensure that the equipment room temperature is above 20 C with sufficient heat load If the heat load is insufficient heat the equipment room with other heating devices or by forcibly running the heater of the unit or adjacent other equipment in this case go through the following procedures till the third step of 6 2 Commissioning Procedures to ensure the heat load is sufficient for the...

Page 96: ...e temperature setting and start cooling or start the cooling manually Record the water flow quantity of the system and water resistance To start cooling open the water flow control valve then change the temperature setting to 5 C lower than the equipment room temperature The control system should then trigger the call for cooling and the water flow control valve opens After at least three minutes ...

Page 97: ...nce personnel can perform system operation and maintenance 7 1 Routine Maintenance Inspection Items Monthly Components of the monthly inspection system focusing on whether the system function is normal and whether the components show any signs of wear and tear refer Table 7 1 the monthly routine maintenance inspection items Table 7 1 Monthly Routine Checklist of Items Part Check Item Remark Air Fi...

Page 98: ...idifier Check the mineral sediments on the water pan Check and fasten the circuit connections Electrical control part Check and fasten the circuit connections 7 3 Self Diagnostic System The iCOM controller provides the diagnostic function of manually opening and closing of components which is used to self test the state of the functional components of the system 7 4 Check the Electrical Connection...

Page 99: ...terface board 5 Check the output connection between the control interface board and various contactors and the input connection between control interface board and heating over temperature protection switch humidifier protection switches filter clogging switch and airflow loss switch In particular check the connection parts such as high pressure switches and solenoid valves and replace tIn particu...

Page 100: ...r Maintenance Guide The efficiency of the filter in the unit is 30 which complies with US ASHRAE52 76 and Eurovent 4 5 standards and the dust resistance value is 90 EU4 standards To ensure efficient operation the dust filter must be checked once a month and replaced as required The filter clogging switch and pressure difference switch are located as shown in Figure 7 1 and Figure 7 2 No Descriptio...

Page 101: ...air pressures from front and behind the filter through a black hose and decides the output after comparing the two values To adjust the setting point of the filter clogging switch you should 1 After replacing the filter restore and seal all the panels so that the alarm point can be found precisely 2 Keep the fan running and rotate the rotary switch of the filter clogging switch counter clockwise u...

Page 102: ...rflow reduction 7 8 Infrared Humidifier Maintenance Guide During the normal operation of the infrared humidifier sediment such as mineral particles will accumulate on its water pan To ensure efficient operation of the infrared humidifier you need to clean the sediment regularly However the cleansing cycle varies because the water quality is different in different regions It is recommended to check...

Page 103: ...tric heater use the iron brush to get rid of the rust or replace it according to actual conditions 2 When heating is required but heating is not effective or no heating effect is observed a multimeter should be used to check whether the cable connected to the temperature switch is functioning correctly to ensure that the three temperature switches are normal 3 If the cable is not functioning prope...

Page 104: ... more water flow is required to flow through the evaporator coil The water flow control valve is composed of a regulator body connector some of the units may not have a connector please pay attention to the actual instance and actuator User should select the two way valve or the three way valve depending on the application situation as shown in Figure 7 4 No Description No Description 1 Actuator 4...

Page 105: ...professional maintenance personnel are the one supposed to operate and handle the equipment 8 1 Fault Diagnosis and Treatment of Fans Refer Table 8 1 for fan fault diagnosis and treatment Table 8 1 Fault Diagnosis and Treatment of Fans Symptom Potential Causes Items to be Examined or Handled EC fan cannot be started Power Supply Disconnected Check the MCB of main fan check if the fans L1 L2 and L3...

Page 106: ...power failure Check whether the humidifier MCB is closed In humidifier contactor closed state check whether L1 L2 and L3 voltages are normal Infrared humidifier lamp burned Replace the lamp 8 3 Refrigeration System Fault Diagnosis and Treatment Refer Table 8 3 for fault diagnosis and refrigeration system Table 8 3 Refrigeration System Fault Diagnosis and Treatment Symptom Potential Causes Items to...

Page 107: ...mptom Potential Causes Items to be Examined or Handled The heating system is not running the contactor does not pull No heating required Check the state of the controller to confirm whether there is a heating requirement Heating auxiliary relay fault Check if the LED besides the relay is on and if the circuit is correct Heating system safety device is disconnected Check if manual reset switch is t...

Page 108: ...e will reduce and eliminate toxic and hazardous substances in products through ongoing research The following application components or toxic and hazardous substances is not limited to the current level of technology or no reliable alternative mature solution 1 Parts of the above reasons lead Copper alloy member containing lead high temperature solder of lead high temperature solder of lead diodes...

Page 109: ...or registered trademarks of their respective owners While every precaution has been taken to ensure accuracy and completeness here Vertiv Group Corp assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions Specifications rebates and other promotional offers are subject to change at Vertiv s sole discretion upon notice ...

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Summary of Contents for Liebert PEX+ Series

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Vertiv Liebert PEX+ Series, User Manual, Page: 104 / 109

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Summary of Contents for Liebert PEX+ Series

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