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SL-18835 - Emerson Network Power

1. NOTE 1 Hot gas hot water are not influenced by the setting of electric reheat during dehumidification 2 Hot gas output will be set only if the selected compressor is in operation Figure 21 Three stage heating Temp Setpoint 70 F Proportional Band 8 F Deadband 2 F Heat 3 On Heat 2 On Heat 1 i On Dead band e 66 67 les 70 100 0 Heating Heat 3 Heat 2 Heht 1 Heating Off Off Off 0 Y Proportional Band Decreasing Temperature 25 Operation 3 4 2 SCR Reheat SCR reheat is a type of electric reheat that provides tighter temperature control than staged electric reheat SCR reheat capacity modulation is achieved by pulsing the reheat On and Off Full capacity is achieved by constantly energizing the reheat Units equipped with SCR reheat can operate in Tight or Standard mode By default cooling units with SCR reheat are factory set to operate in Tight mode The mode of operation can be set by adjusting the SCR Control Type parameter Service Menu Setpoints Tight Mode In Tight mode the compressors and reheats are operated at the same time to provide maximum temperature control The temperature deadband is set to zero at the factory In a cooling unit with SCR reheat and two single step compressors the first single step compressor is started and full reheat capacity is provided at 0 calculated output from the Temperature Proportional Band As the call for coolin
2. Measurement Units Type English SI Air Pres 1 25 to 1 25 inWC 320 00 to 320 00 Pa Pressure 320 00 to 320 00 PSI 22 00 to 22 00 Bar Temp 320 00 to 320 00 F 160 00 to 160 00 C Percent 320 00 to 320 00 320 00 to 320 00 99 Service Menu Parameters lt ATA Table 17 Service contact information parameters Function Large Display Page 1 of 1 Small Display Range Imperial metric Password PASSWORD Country Country None Austria Switzerland D Switzerland F Benelux D Benelux FL Germany France UK Hungary Italy Poland Spain United States Australia New Zealand Indonesia Malaysia Singapore Address line 1 Address line 1 text string Address line 2 Address line 2 text string Address line 3 Address line 3 text string Address line 4 Address line 4 text string 100 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Power a business of Emerson NYSE EMR is the global leader in enabling Business Critical Continuity from grid to chip for telecommunication networks data centers health care and industrial facilities Emerson Network Power provides innovative solutions and expertise in areas including AC and DC power and precision cooling systems embedded computing and power integrated racks and enclosures power switching and controls infrastruc
3. Features Large and Small Displays The Liebert iCOM is available with either a large or small liquid crystal display The Liebert iCOM with small display has a 128 x 64 dot matrix screen that simultaneously shows two menu icons along with descriptive text This display is capable of controlling only the unit it is directly connected to The Liebert iCOM with large display has a 320 x 240 dot matrix screen that shows up to 16 menu icons at a time as well as descriptive text This display can be used to control a single cooling unit or any cooling unit on a network regardless of how it is connected either integrated into a cooling unit or simply connected to the network and mounted remotely Liebert iCOM s menu driven display is used for all programming functions on each connected cooling unit The Status menu shows the status of the conditioned space such as room temperature and humidity temperature and humidity setpoints alarm status and settings event histories and the current time 72 52 Wall Mount Large Display 2 A Liebert COM Input Output Board Direct Panel Mount Small Display and Bezel Liebert iCOM Display Components and Functions 2 0 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS The small and the large display have a common key layout as shown in Figure 2 Figure 2 Liebert iCOM display components Liquid Crystal Display LED Status Indicators top LED is red or flashi
4. UNIT 01 PASSWORD Actual Level 0 HP 1 Alarm Code HP 2 Alarm Code HT 1 Alarm Counter HT 2 Alarm Counter LP 1 Alarm Code LP 1 Alarm Code Actual LP 1 Pressure Actual LP 2 Pressure Actual HP1 Pressure Actual HP2 Pressure 4 for next previous unit gt to select parameter then gt to change parameter to confirm HP 1 Alarm Code Compressor 1 high pressure alarm code 0 no alarm 2 high pressure alarm active HP 2 Alarm Code Compressor 2 high pressure alarm code 0 no alarm 2 high pressure alarm active HT 1 Alarm Counter Compressor 1 high temperature event alarm counter If more than five events in a rolling 4 hour period occur then the compressor will be locked out HT 2 Alarm Counter Compressor 2 high temperature event alarm counter If more than five events in a rolling 4 hour period occur then the compressor will be locked out LP 1 Alarm Code Compressor 1 low pressure alarm code 0 no alarm 2 low pressure alarm active LP 2 Alarm Code Compressor 2 low pressure alarm code 0 no alarm 2 low pressure alarm active Actual LP1 Pressure Current refrigerant low pressure side reading in atmosphere for Compressor 1 Actual LP2 Pressure Current refrigerant low pressure side reading in atmosphere for Compressor 2 Actual HP1 Pressure Current refrigerant high pressure side liquid reading in atmosphere for Compressor 1 This is available only on water cooled units equipped with
5. An event is active as long as it is not acknowledged Once acknowledged an alarm remains active until the event situation is not true anymore and the event is reset by the board which switches off the red LED and the general alarm relay 38 Operation 3 9 5 Possible Event Notifications Table 12 lists examples of alarms and warnings that can be configured for a cooling unit When any of these occur they will appear on the Liebert iCOM Status menu and will be recorded in the Liebert COM Event log Table 12 Event notifications large or small display Event Type COMP 1 HRS EXCEEDED WRN COMP 2 HRS EXCEEDED WRN EL HEAT1 HRS EXCEEDED WRN EL HEAT2 HRS EXCEEDED WRN EL HEAT3 HRS EXCEEDED WRN FC HRS EXCEEDED WRN GENERAL ALARM ALM GLYCOL TEMP SENSOR WRN HIGH CW TEMP WRN HUM HRS EXCEEDED WRN HUMIDIFIER PROBLEM HW HG HRS EXCEEDED WRN LOSS OF CW FLOW ALM NETWORK FAILURE WRN ON OFF KEY DISABLED WRN POWER ON MSG POWER OFF MSG ROOM SENSOR FAILURE ALM UNIT DISABLED MSG UNIT HRS EXCEEDED WRN UNIT ON MSG UNIT OFF MSG UNIT DISABLED MSG UNIT SHUTDOWN MSG UNIT SYNCHRONIZATION MSG SENSOR A FAILURE WRN SLEEP MODE MSG STANDBY MODE MSG SUPPLY SENSOR FAILURE WRN 39 Operation 3 10 3 10 1 Wellness Next Maintenance Calculation The next maintenance calculation as well as the diagnostics feature will help k
6. HTTP Web and SNMP See the Liebert Web site for the latest supported protocols Modbus reference information and SNMP MIBs www liebert com An alternate limited method of communicating with an existing Liebert SiteScan Web monitoring system is via twisted pair cables connected to terminals 77 and 78 on the cooling unit terminal strip To use this method the Liebert IntelliSlot power supply connection to P65 on the Liebert COM I O board must be unplugged and the factory supplied 77 78 cable must be connected to P65 follow Liebert SiteScan instructions for further connections The appropriate Liebert iCOM control parameters must be configured to utilize the terminals Liebert iCOM software versions PA1 04 022 STD and older which shipped before to November 2010 will support Velocity V3 The older Velocity V3 cards will become obsolete with the advent of the Velocity V4 protocol and the newer Liebert IntelliSlot cards that communicate with this protocol The newer cards are compatible with the older Liebert IntelliSlot cards Modbus mapping and data NOTE Liebert SiteScan will be limited to legacy parameters when communicating via Terminals 77 and 78 Table 15 Liebert IntelliSlot card compatibility Card Software Version Compatibility Protocol Supported IS 485L Modbus RTU 485 IS WEBL SMTP SNMP SMS HTTP Liebert SiteLink E communication card supports enhanced data set for Liebert iCOM PA1 04 033 STD Velocity V4 IS
7. Single Unit Functions Unit Fan Control Start Stop The fan output is first activated when the unit is switched On The unit can be switched On and Off from two inputs Remote Off Remote shutdown terminals will turn off the connected unit thus displaying remote off on the front display This command can also be invoked from a BMS Display Off When a unit is turned off from the System Screen of a large display Display OFF is shown for unit status Local OFF When a unit is turned Off from the Unit Status Screen or small display Local OFF is shown for unit status Pressing the On Off key on a small display will affect only the cooling unit it is mounted on regardless of whether the cooling unit is a stand alone unit or part of a network The small Liebert iCOM display does not have access to the Unit to Unit network NOTE Pressing the On Off key on a large display of a stand alone cooling unit will control only that unit The effect of pressing the On Off key on a large display connected to a network depends on the view System or Unit In System view pressing the On Off key shows a warning asking for confirmation to shut down the entire system In Unit view pressing the On Off key affects only the unit being viewed without a confirmation request Each time a unit is powered on or off an event is added to the Event Log in the User menu NOTE Customer switches remote On Off if used and display On Off switches are i
8. for next previous unit gt to select parameter then to change parameter to confirm Displays the periods a unit is in sleep mode each day of the week 61 Service Menu Parameters 8 0 SERVICE MENU PARAMETERS Service menus allow customized settings for site operations The password for service menu parameters is 5010 The Liebert iCOM firmware is being updated constantly As a result the Service menu parameter tables shown in this manual may be slightly different than what is shown on your cooling unit s display Please check www liebert com for the latest Liebert iCOM User manual updates Figure 46 Service Menu Main Screen SERVICE MENUS 4 UNIT 01 gt 4 to change level gt 4 to navigate gt to open requested menu ESC to unselect 62 Service Menu Parameters Figure 47 Setpoints screen page 1 of 6 SETPOINTS pg 1 of 6 4 UNIT 01 gt PASSWORD Actual Level 0 eee 51104 Temperature Setpoint LF SM 10 Control Type Proportional S4074 Temperature Proportional Band SF Temperature Integration Time min SANA AutoSet Enable Temperature DeadBand SARLI Second Setpoint SM Backup Temperature Setpoint SUMAN Heaters DeadBand 4 for next previous unit gt to select parameter then gt to change parameter to confirm Temperature Setpoint Selects a return temperature that the cooling unit will maintain by applying cooling and or reheats This is adjustable from 41 104 F 5 4
9. Liebert CW and Liebert DS Air Cooled Units The Liebert iCOM allows an external sensor or analog device to be connected scaled and viewed on the Liebert iCOM large display for Liebert CW and Liebert DS air cooled units only These external devices require optional analog input connections that can be installed on new units at the factory or added to existing units in the field The option provides the electrical connection from the Liebert iCOM control board to the cooling unit s field wiring connection area If a Liebert CW or Liebert DS air cooled unit is equipped with this option then a 0 10VDC 0 5VDC or a 4 20mA device can be connected to terminals 41 and 42 43 and 44 45 and 46 or 47 and 48 See Table 9 for analog input availability Table 9 Number of analog inputs Unit Type Liebert CW with MBV Liebert CW with 3P Stem Valve Number of Analog Inputs 4 3 one used for valve feedback Liebert DS Air Cooled DX 2 two used for suction pressure management NOTE This option is not available on fluid cooled units Fluid cooled units use all four analog inputs for low and high refrigerant pressure management Follow the settings illustrated in Figure 27 and Table 10 to set the input type based on the sensor output being used The default analog input is 0 5VDC Only properly trained and qualified service technicians should change the analog input type Figure 27 Analog connection control board switch
10. 2 Cycle Ramp Compressor 2 Cycle Ramp Selects the capacity the compressor should run at The range is 0 to 100 Compressor 2 LLSV Controls the liquid line solenoid valve for Compressor 2 75 Service Menu Parameters Figure 64 Diagnostics service mode screen page 3 of 8 DIAGNOSTICS SERVICE MODE page 3 of 8 4 UNIT 01 PASSWORD Actual Level 0 Electric Heat 1 or HG HW Electric Heat 2 or E Heat 1 Electric Heat 3 or E Heat 2 SCR Heat Dehumidification Output Humidifier Fill Humidifier Humidifier Drain Humidifier Current 4 for next previous unit e to select parameter then gt to change parameter to confirm Electric Heat 1 or HG HW Activates Stage 1 of the unit s reheat system Electric Heat 2 or HG HW Activates Stage 2 of the unit s reheat system Electric Heat 3 or HG HW Activates Stage 3 of the unit s reheat system SCR Heat Specifies the pulse width the heating system should run at on units using silicon controlled rectifier type reheat Dehumidification Output Activates the dehumidification cycle Humidifier Fill Activates the humidifier water source solenoid valve which fills the humidifier pan or canister with water Humidifier Activates the humidifier system in its entirety Humidifier Drain Activates the humidifier drain solenoid allowing water to drain from the canister if the unit is equipped with an optional the steam generating humidifier Humi
11. 6 2 Intelligent TIf Intelligent Control is selected the air temperature humidity is controlled at or near the setpoint The percent temperature humidity adjustment required is calculated based on logic that is programmed into the control This logic simulates the actions that a human operator would take if manually controlling the system This control type is commonly selected on chilled water units NOTE The actual air temperature sensor reading is always displayed on the Status menu The value displayed for the return air humidity sensor reading depends on the Humidity Sensor Control Type see 3 6 2 Humidity Sensor Reading Control Types Humidity Sensor Reading Control Types The Liebert iCOM has three humidity sensor control types Relative Compensated and Predictive The humidity sensor control adjusts how the Temperature and Humidity Control determines the percent requirement for humidification dehumidification The humidity sensor control type parameter Humidity Control Type is in both the User and Service menus under Setpoints Relative tThe actual return air humidity sensor reading is sent to the Temperature and Humidity Control to determine if and how much humidification dehumidification is required The actual return air humidity reading is displayed on the Status menu Unnecessary dehumidification can result when overcooling occurs during a dehumidification cycle This is because a higher than normal relative humidity RH r
12. 70 F Fully Loaded Proportional Band 8 F Comp 2 On Partially Deadband 2 F Loaded a Comp 1 On Partially Loaded I Y Dead I l l PEE 100 0 Comp 1 h Coine Cooling Off l 2 l 4 1 Comp 2 i Off Y Proportional Band Increasing Temperature 21 Operation 3 2 3 Chilled Water Control The chilled water control valve is adjusted proportionally as the temperature control varies the requirement for cooling from 0 to 100 A three point actuator or motorized ball valve is used for chilled water cooling as well as free cooling hot water or heating The three point actuator is driven through two digital outputs Open and Close The control determines the valve position by timing how long the open or closed signals have been active based on the valve travel time set in the Service menu Setup submenu To determine the initial position of the valve the unit must perform a 3P Reset The 3P Reset closes the valve for a time of 110 of the 3P Actuator run time This calibrates the valve with the controller and ensures that it is closed A 3P Reset is also performed if the fan is switched off for any reason timer off unit off etc Once the reset is performed The three point actuator can be configured to utilize the pre wired feedback signal provided from the factory Enabling the feedback signal is required when supply air control is being used with the 3P valve to increase the valve s position accuracy Enabl
13. Analog Input 2 The numeric designation on each measurement type is just to allow the user to differentiate between readouts if multiple measurements of the same type are required Precision Parameters in the Precision column must match the DIP switch settings for each analog input being used There are two choices for these parameters 0 5V and 0 10V This setting will also regulate the range of an analog input s linear characteristic on Page 5 of the Options Setup screen of the Service Menu see Figure 92 Line S441 Determines the unit type English or SI that will be used for the setup and readout of custom sensors This parameter affects only analog inputs All lines in other menus involving pressures or temperatures will have their readout type determined by line U404 of the User Selection menu The table below shows the English and SI units for each measurement type Units Measurement Type English SI Air Pres inwC Pa Pressure PSI Bar Temp F C Percent When the unit type is changed on line 441 the linear characteristics for all of the inputs on Page 5 of the Options Setup screen of the Service Menu will be converted to match the new units system and the readout in the Sensor Data in the User Menu will also change to reflect the new units 98 Service Menu Parameters Figure 92 Options setup page 5 of 5 OPTIONS SETUP page 5 of 5 4 for next previous unit then to ch
14. Basic settings screen page lof 8 cc ce eee ene ees 70 Wellness Motor settings screen page 2 of 8 0 0 ee een ees 70 Wellness Compressor 1 settings screen page 3 of 8 0 0 ccc eee nes 71 Wellness Compressor 2 settings screen page 40f 8 0 0 ccc eee nes 71 Wellness Electric heater 1 settings screen page 508 ooooooooooo ees 72 Wellness Electric heater 2 settings screen page 60f 8 6 ec ees 72 Wellness Electric heater 3 settings screen page Tof 8 6 cee ees 73 Wellness Humidifier settings screen page 8 of 8 0 0 0 00 eee eens 73 Diagnostics service mode screen page 108 74 Diagnostics service mode screen page 208 75 Diagnostics service mode screen page 308 76 Diagnostics service mode screen page 408 TT Diagnostics service mode screen page 508 78 Diagnostics service mode screen page 608 79 Diagnostics service mode screen page TOL8 0 80 Diagnostics service mode screen page 8 08 81 Set alarms screen page 1 of 8 2 eee ene ee eens 82 Set alarms screen page 2018 83 Set alarms screen Page OLS ai A A nae oS Bb EE EN IS ws 84 Set alarms screen page 4 0f 8 ooo 85 Setvalarms scre n ipage 5 Of Binz kes ised E A SE E eh E eel 85 iii Figure 75 Figure 76 Figure 77 Figure 78 Figure 79 Figure 80 Figure 81 Figure 82 Figure 83 Figure 84 Figure 85 Figure 86 Figure 87 Figure 88 Figure 89 Figure 90 Figure 91 Figure 92 Table
15. Problem Shows the status of the high water level indicator on an infrared humidifier Status DT1 Outdoor Glycol Indicates if the delta T between outdoor air ambient temperature and glycol fluid temperature has been met Status DT2 Glycol Room Indicates if the delta T between glycol and room return air temperature has been met Status DT3 Room Setpoint Indicates if the delta T between room return air temperature and unit air temperature setpoint has been met Status Min CW Indicates if the free cooling or chilled water temperature is below the minimum chilled water setpoint LWD Value Liebert HPM only Displays percent leakage from 0 100 on units with the optional analog Leakage Water Detector Status LSI Liebert HPM and Liebert PeX only Shows the status of the high water level indicator on units with variable capacity steam bottle humidifiers Status Condenser 2 Failure Liebert HPM only Shows the status of the Condenser 2 failure indicator 80 Service Menu Parameters Figure 69 Diagnostics service mode screen page 8 of 8 DIAGNOSTICS SERVICE MODE page 8 of 8 4 UNIT 01 gt PASSWORD Actual Level 0 Valve Control Start Valve Calibration Calibration Status V1 0 open V1 100 open Current V1 Feedback V2 0 open V2 100 open Current V2 Feedback 4 for next previous unit to select parameter then gt to change parameter to confirm Valve Control Con
16. Return Air Return Air Humidity f Setpoint Return Air Supply Air Temperature E Humidity Setpoint Supply Air System or Setpoint Temperature Unit view optional Return Air Percent Hot Water Temperature Heating Evaporator Se Electric Fan Speed Pond 100 M Percent Dehumidifying Percent Cooling GKO Percent Humidifying Free Cooling 0 Percentage et 12 2011 System or Unit On Off 11 11 2009 09 18 07 11 11 2009 8 31 MSG UNIT ON 11 11 2009 8 30 MSG UNIT ON 4 for next previous unit for system view for menu for previous screen for help Next Maintenance Most Recent Log Events Date Time Unit Description Date and Time Figure 4 Liebert iCOM default screen symbols fe cooling freecooling maintenance TSt N hot water electric heat humidification dehumidification Liebert iCOM Display Components and Functions 2 1 2 1 1 Navigating Through the Liebert iCOM Menus Liebert iCOM shows icons and text for monitoring and controlling your Liebert cooling units or network of cooling units The number of icons and amount of text shown depends on the display size Control Interface When the buttons on the Liebert iCOM have not been pressed for a short period the display backlight turns off Pressing any key will turn the backlight on wake up the screen and display the Status menu of the last cooling unit viewed The Status menu will show the cooling unit s operational mod
17. Temperature and Humidity Events High and low temperature and humidity alarms can be set for both the internal and optional external sensors If a sensor reading exceeds a preset threshold a warning will appear These warnings are ignored after unit startup for a minimum of 1 minute To increase the delay to warn see 3 9 Event Types and Properties The threshold settings are located in both the User and Service menus under Set Alarms To apply threshold limits on the internal cooling unit sensors the Return Sensor Alarms must be enabled The high and low temperature and humidity internal sensor thresholds can then be set To apply threshold limits on the optional external sensors the Sensor A alarms must be enabled The high and low temperature and humidity external sensor thresholds can then be set If no external sensors are connected to the unit it is recommended that the Sensor A Alarms be disabled NOTE The event messages will automatically reset if the temperature humidity stays 1 8 F 1 C 2 RH below or above the threshold for one minute User Inputs The user can connect and specify up to four inputs depending on unit configuration The user inputs are digital inputs that can provide information about an event associated with the unit or space The customer input configuration settings are in the Service menu under Set Alarms Screen 2 of 7 The choices for the customer inputs are shown in Table 8 along with their associated re
18. adjust the airflow based on the cold aisle temperature and the cooling output based on the discharge air temperature The Liebert Smart Aisle Control focuses on the inlet temperature to the racks The Liebert Smart Aisle Control also manages each component independently to manage the energy usage to provide the correct amount of cooling As the environment changes the Liebert iCOM will adjust the airflow and heat rejection based on the sensor readings at the discharge air temperature of the unit and the cold aisle temperature The Liebert Smart Aisle Control also will automatically adjust cooling based on the configuration of the cold aisle The control can automatically adjust fan speed and cooling capacity when the cold aisle configuration is changed This includes no containment end containment and total containment of the cold aisle Currently the Liebert Smart Aisle Control is limited to chilled water units with variable speed fans and one cold aisle sensor per unit Figure 26 Equipment layout for Liebert Smart Aisle Control tf TOS Fanspeed Contro O NY CRAC Unit EL mP Server Rack Water Valve Opening gt y gt g E Q 6 g D O A Speed Control 3 8 1 Hardware Setup The Liebert Smart Aisle Control requires A temperature humidity sensor in the cold aisle and connected to the Liebert COM via CAN bus This can be done by Moving the return temperature sensor from th
19. can be used to control limit or reference the discharge air temperature of the cooling unit The desired supply sensor operation can be selected in the Service Setpoints menu The optional supply air temperature sensor allows use of either the Supply Air control or the Supply Limit control This sensor can be added to existing Liebert iCOMs by purchasing the supply sensor and wiring harness The supply air sensor must be connected to P13 pins 1 2 Contact your local Emerson representative for pricing and installation Supply Control When the supply sensor is set to Control the unit will control the amount of cooling heating being provided based on maintaining the discharge air temperature The return air sensor will still control the humidity of the room NOTE If unit is equipped with a 3P actuator type valve then the valve must be changed to utilize the feedback signal See 3 2 3 Chilled Water Control Supply Limit Chilled water units may be set up with the supply air sensor to maintain a minimum air temperature under a raised floor to help prevent condensation In order to avoid supply temperatures that are too low the Supply Limit can influence the opening of three point or analog actuators or the output of analog valves The control compares the deviation from the return air setpoint and the supply limit setpoint and calculates the output to the actuator from the smaller deviation Cooling Only When Cooling Only is selected
20. if provided Near I O Board Optional Large Graphics Display Rear View Customer Connection Point he if provided U2U Networking Switch Field Supplied Not Used bens P65 es r Liebert iCOM I O Board ry P12 Na gt To From Other Networked Units Straight Through Ethernet Cables If coupler is not provided connect one end plug to P64 of large graphics display and the other end to the Liebert COM I O board zal P13 11 P11 52 Installing a Liebert iCOM Unit to Unit Network Liebert vNSA The Liebert vNSA is designed to connect multiple Liebert iCOMs The Liebert vNSA contains either one or two powered industrial rail switches An optional remote large display can be attached to the front door as well All models have a power supply that requires connection to a single phase 120VAC or 230VAC power source The enclosure features a key lock for security The Liebert vNSA supports autonegotiation autopolarity and autocrossing allowing for the use of standard network cables for connection to each port rather than special crossover cables The switch detects and makes adjustments for the network s speed and transmission mode polarity and transmit and receive pins See the Liebert vNSA user manual SL 18840 for more details The number of ports available for connecting Liebert iCOMs varies by model as shown in Table 14 Models with a re
21. master unit evenly divides the system proportional band among the number of available units Each unit will receive instruction on how to operate from the master unit based on how far the system deviates 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 NOTE Q 1 Proportional actuators chilled water valve free cooling actuator are driven in parallel in all units 2 Changeover to second cooling source low limit during dehumidification and low supply limit control air local functions managed from each unit independently Figure 28 shows how two cooling units work together in Teamwork Mode 1 Since Unit 1 and Unit 2 are available to operate the master unit Unit 1 averages the temperature and humidity sensor readings from each unit The master unit determines that a 60 call for cooling is required for the system Since there are two available cooling units each unit makes up half of the system proportional band Unit 1 handles 0 50 system call for cooling and Unit 2 handles 51 100 For every 1 system call for cooling each unit provides 2 of its total cooling capacity The 60 system call for cooling exceeds the 50 Unit 1 can provide so Unit 1 operates at full capaci
22. only Sets the percent of unit airflow to activate the Loss of Airflow event on units with optional analog airflow sensor Actual Airflow Liebert HPM only Displays the percent of unit airflow from 0 100 on units with optional analog airflow sensor 78 Service Menu Parameters Figure 67 Diagnostics service mode screen page 6 of 8 DIAGNOSTICS SERVICE MODE page 6 of 8 4 UNIT 01 Status HP1 Status LP1 Status C1 OL Status HP2 Status LP2 Status C2 OL 4 for next previous unit e to select parameter then gt to change parameter to confirm Status HP1 Shows the status of the unit s compressor 1 high pressure switch input Status LP1 Shows the status of the unit s compressor 1 low pressure switch input Status C1 OL Shows the status of the unit s compressor 1 overload input Status HP2 Shows the status of the unit s Compressor 2 high pressure switch input Status LP2 Shows the status of the unit s Compressor 2 low pressure switch input Status C2 OL Shows the status of the unit s Compressor 2 overload input 79 Service Menu Parameters Figure 68 Diagnostics service mode screen page 7 of 8 DIAGNOSTICS SERVICE MODE page 7 of 8 UNIT 01 Status Humidifier Problem Status DT2 Glycol Room Status DT3 Room Setpoint Status Min CW LWD Valve 4 for next previous unit to select parameter then gt to change parameter to confirm Status Humidifier
23. set up to work together in any of three teamwork modes No Teamwork Teamwork Mode 1 Teamwork Mode 2 All Liebert iCOM controlled cooling units on a network must be set to run in the same teamwork mode 4 1 1 Application of Teamwork Modes No Teamwork Multiple zones in one room Teamwork Mode 1 Balanced load small groups of units inside the same environment Teamwork Mode 2 Unbalanced load large rooms not all units will have the same load work well for most applications All units in a network will run in the same Teamwork Mode 4 1 2 No Teamwork All cooling units work independently responding to their own sensors Standby function and unit rotation are possible but cascading is not see Standby and Cascade on page 44 Autoset will not adjust the proportional band in this mode 42 Teamwork 4 1 3 Teamwork Mode 1 Teamwork Mode 1 works best in small rooms with balanced heat loads The return temperature and humidity sensor readings of all units in operation fan on are averaged by the master unit Unit 1 and used for control The master unit will send the operating requirements to all operating units according to unit numbers rotated by one unit every 24 hours In this teamwork mode most of the parameters are shared if set in any one of the units all other units will follow with the same settings AutoSet will adjust the proportional band in Teamwork Mode 1 see 3 2 1 Temperature Proportional Band The
24. set with either return or supply air control An exception is when the supply sensor is set to Cooling Only During this operation with the VSD Fanspeed set to Auto the chilled water valve is controlled by the supply sensor and the fanspeed is controlled by the return sensor and its associated control mode settings Manual Operation When set to Manual the speed of the fan motor follows user input as set either locally at the Liebert COM display or remotely via Modbus communication which works in conjunction with an optional Liebert IntelliSlot 485 card Economy Operation free cool or dual cool units only When set to Economy the speed of the fan motor follows the Free Cooling or Dual Cool water valve The fan speed output latches to percentage value set at STD setpoint Service Menu Setpoints when a compressor activates to prevent the DX system from operating at low evaporating pressure which might cause the coil to freeze Delta Operation When set to Delta the fan speed modulates in relation to two temperatures that are read from a sensor board which is optional The sensor temperature readings will be compared and a delta between the two sensors will be determined The delta of the two sensors will be compared to the fan speed delta setpoint and will determine the correct fan speed This control can be adjusted using the Fan Speed P Band and the Fan Speed Integration to determine the rate of change based on the sensor delta Delta opera
25. single step compressors without unloaders or one compressor with an unloader two step Cool 2 Temp Setpoint 70 F On Proportional Band 8 F l Deadband 2 F Cool 1 1 2 Dead band we 78 74 EN l l l 0 Caol 1 Cool 2 100 Cooling or Off i Cooling 1 2 Proportional Band Increasing Temperature Two Compressors With Unloaders Four Step The first two step compressor is started unloaded at 33 calculated output from the temperature proportional band and stopped at 17 At 80 Compressor 1 will be loaded at 70 unloaded The second compressor starts unloaded at 63 and stops at 47 At 100 Compressor 2 will be loaded at 90 unloaded see Figure 15 The four stages of cooling are accomplished in the following manner 1stage One compressor unloaded Cool 1 2 stages Both compressors unloaded Cool 2 3 stages One compressor loaded and one compressor unloaded Cool 3 4 stages Both compressors loaded Cool 4 Figure 15 Two compressors with unloaders four step Temp Setpoint 70 F Proportional Band 8 F Cool 3 Deadband 2 F Y Dead band I 70 S roy 73 ES 0 i Cool 1 Cool 3 1 100 Cooling Off Cool 2 Off Cool 4 Cooling i off Off 1 Increasing Temperature 20 Operation Digital Scroll Compressors A digital scroll compressor can modulate its capacity anywhere between 10 100 This variable capacity modulation allows cooling units to co
26. that contains the parameter to be changed 2 Select Password in the submenu by pressing the Enter key 3 Press the Enter key to move your cursor to the right side of the screen to select the question marks 4 Use the arrow keys to enter the numeral for the password s first digit the up arrow key moves from 1 to the next digit 5 Use the right arrow key to move to the next question mark and repeat Step 4 to enter all digits in the password 6 After entering the password press enter If the password is correct the Actual Level shown to the right of Password will change from 0 to 1 or 2 The menu will remain locked if the password was incorrect NOTE Returning to the Status menu will require re entering a password to make changes Liebert iCOM Display Components and Functions Figure 6 Entering a password SETPOINTS 4 UNIT 01 gt 0104 Temperature Setpoint 13 F VLEI Humidity Setpoint 50 0 VKE Humidity Control Type Relative UL Supply Sensor Control WI Supply Setpoint 50 F Backup Temperature Setpoint 73 F 4 for next previous unit to select parameter then gt to change parameter to confirm Figure 7 Menu tree Large display stand alone Unit 1 will be displayed in the top left corner of the screen Status Menu System View Status Menu Unit 1 View User Menu Service Menu Advanced Menu Unit 1 Unit 1 Unit 1 Password Password Password Setpoints Setpoints Factory
27. the buttons on the front display have not been pressed for the time selected in this parameter the back light will turn Off extending the life of the display and saving energy Display Shows Selects if the main display shows the temperature and humidity actual values only setpoint values only or both actual and setpoint Display Colors Selects the background color Inverted sets the display to show white font with blue background Normal sets a white background with blue font Date Format Changes the month day and year arrangement shown on the front display and event time stamps 60 User Menu Parameters Figure 44 Total run hours screen TOTAL RUN HOURS SYSTEM E 3 Actual Hours Fan Motor s 28 Compressor 1 Compressor 2 Chilled Water Free Cool Hot Gas HotWater Electric Heater 1 Electric Heater 2 Electric Heater 3 Humidifier Dehumidification o 2000000 O O OO OGOOGO O 4 for nextprevious unit to select parameter then to change parameter to confirm Displays the cumulative hours a particular component has been operating and the limit placed on the hours the component may operate Figure 45 Sleep mode screen SLEEP MODE UNIT 01 PASSWORD Actual Level 0 222 Sleep On MON TUE WED THU FRI SAT SUN No No No No No No No Sleep Every day 1 From 00 00 to 00 00 Sleep Every day 2 From 00 00 to 00 00 Timer Mode Yes Timer Mode Type SYSTEM OFF Dead Band E 4
28. the cooling capacity of the system valve or compressor is modulated based on the supply temperature but allows the fan speed to be controlled by a different sensor Disable Setting the supply sensor to Disable will allow the supply sensor to be monitored but will not affect the control output of the unit NOTE Supply control and limit are calculated on each unit independent of the other sensor readings on the network When the supply air sensor is set up for Supply control additional Supply Air configuration parameters valve pulse cooling filters and return compensation can be used to further enhance the supply air control 32 Operation The valve pulse and cooling filter timer can be adjusted to prevent oscillating around the supply setpoint and still allow for rapid valve adjustments to compensate for heat load changes Contact your local Liebert service personnel for adjustments Return Compensation begins to increase the supply air setpoint when the return air decreases below the return air setpoint Example Setting the return compensation value in the Service Setpoints menu to 5 F 2 7 C will increase the supply setpoint from 50 F to 55 F 10 C to12 8 C when the return temperature is at the low limit of the proportional band 3 8 Liebert Smart Aisle Control Liebert Smart Aisle Control allows the Liebert iCOM to manage airflow and cooling capacity independently This control mode allows the unit to
29. to select parameter 4 for next previous unit then to change parameter gt to confirm Customer Input 1 2 3 amp 4 Select the device and operation of the customer inputs Each event reflects a different alarm and possible action to the unit Refer to Table 7 for a description of selectable options Customer Input 1 2 3 amp 4 active when Select whether the input is a normally closed or normally closed input WARNING ACTIVATES ALARM RELAY Sets the alarm relay K3 to activate when a warning occurs Water Alarm Shuts Unit Down Turn the unit Off if a water alarm occurs Set Alarm Screens Pages 4 8 The Set Alarm Screens pages 4 through 8 Figures 73 through 77 permit setting the operation of an active alarm Each event can be enabled or disabled and can be set to operate as an alarm warning or message The delay is the time the control waits before reporting the event Alarm Annunciates the buzzer triggers a monitoring event triggers the alarm relay and flashes the red LED on the display Warning Annunciates the buzzer triggers a monitoring event shows the event in the event viewer front display and flashes the red LED on the display Message Shows the event in the event viewer and on the front display Delay tThe delay selection for each alarm EN DIS The enable disable selection for each alarm provides the ability to individually select the alarms that will or will not activate when the ala
30. to the Liebert unit via contact closure Closed activate second cooling source control Open deactivate second cooling source control The Value setting is the factory default setting 8 F 4 4 C on free cooling and dual cooling units If the temperature difference between the second source cooling fluid parameter Freecooling Fluid Temperature User Menu Sensor Data and room air is equal to or greater than the adjustable DT Between Room Air FC Fluid Service Menu Setpoints value then the second source cooling fluid will be used to provide at least partial cooling Sensors used for this delta T are room local sensor or the return air sensor and the glycol sensor If this delta T is true the following actions will be performed 1 The Free Cooling Status indication will show On instead of Off 2 The compressor band will be shifted to the right by 100 and within the first 100 the free cooling valve band will take place see Figure 20 The cooling portion of the proportional band is doubled with the first half of the band controlling the free cooling valve and the second half controlling the compressors 23 Operation Figure 20 Second cooling source and two step compressorized cooling Temp Setpoint 70 F Proportional Band 8 F Deadband 2 F Valve Valve 100 Cool 1 Cool 2 Closed Open On On l 100 Cooling nf m 2 73 74 7 7 7 78 PN l 0 Y Proportional Band Y Proportion
31. 0 C the factory default is 73 F 22 7 C Control Type Selects the type of control the system will use to activate cooling or heating A detailed description of each control type can be found in 3 6 Control Types Temperature Proportional Band Adjusts the activation points of compressors or rate of change based on the actual sensor values deviation from setpoint The smaller this number the faster the compressors and valve s will increase capacity Too small of a number may cause the unit to short cycle the compressors or excessively reposition the valve Temperature Integration Time Adjusts the capacity of the unit based on time away from setpoint so that accurate temperature control can be maintained This parameter is active when Control Type is set to PI AutoSet Enable Sets the temperature and humidity proportional bands automatically based on the type of unit when this parameter is set to YES and if teamwork modes are selected To change the proportional bands this parameter must be set to NO Temperature Deadband Avoids overshooting of the setpoint and cycling between the reheats and cooling The value entered in this field will be split in half by the temperature setpoint Example If the temperature setpoint is 70 F 21 1 C and a 4 F 2 2 C deadband is set then no cooling will be activated until 72 F 22 2 C and no heating will be activated until 68 F 20 C is reached Second Setpoint
32. 0 0 0 00 cee ee 17 3 1 7 Service Offset Changing System Pressure Settings 0 0 0 eee 18 Temperature Control Single Source Cooling No Extra Cooling Coil 18 3 2 1 Temperature Proportional Band 18 3 2 2 Compressor Control ecg id di td ere edited dew eB Sh Padi eae 19 8 2 3 Chilled Water Control tos A an ST ee BRE SO BRA Ie a eS 22 Temperature Control Second Cooling Source 0 0 0 ccc cece ene 23 3 3 1 Differential Temperatures Controls Comparator Circuit ooooooooooooooo 23 Temperature Control Reheat 0 ee eens 25 3 4 1 Electric Hot Gas and Hot Water Reheat 20 0 cee een nes 25 B42 SCR REAL a e ake and Dos eae a ace he A TA tz 26 H midity Controls sce ii dd dai 27 BOL Hama ON rea A is ee Ba eb WOR scaled eh 28 3 02 Dehumiditica tion s cas A ea dee a ae a he ae ER ae ee aoe ees i 29 Control Eypes ta ri chet a RAN NS 2 30 3 6 1 Temperature and Humidity Control Types 0 0 0 30 3 6 2 Humidity Sensor Reading Control Types 0 0 0 ccc eee e eens 31 Supply Controls A aoe ORDA Gi ORES EE LESS RR fa 32 SL SU PL yA Aon AS O Si anes aoe soya Blass 32 Liebert Smart Aisle Control di A oa EEG RE Foe A E A BETA as 33 3 8 1 Hardware Setup x ina sts tabs Cad a Fo tee Ba is OS oe Wow Pe Re ed 33 3 8 2 o Software Setup e se thes eg de E De RP Ae des A bho ol Ae SOAS 34 Event Types and Properties ao iiss ao thai a are Oe eR a SG EIT ts T 34 3 9 1 H
33. 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Set alarms screen page 6of8 ooo 86 Set alarms screen page 7 of Bo 86 Set alarms screen page 8 0f 8 2 eee cent nett teens 87 1iCOM DO overview and override screen page 103 ooooooooooooooooooooo 87 1iCOM DO events setup screen page 2 of 8 0 eee eens 88 iCOM DO events setup screen page BOB 88 Sensor calibration setup screen page lof Bo 89 Sensor calibration setup screen page 20f BB 90 Sensor calibration setup screen page 3 of Bo 90 System network setup screen System page 1 of 2 large display only 91 System network setup screen System page 2 of 2 large display only 92 System network setup screen Unit page lof2 0 teens 93 System network setup screen Unit page 20f 2 0 cee eee 94 Options setup page 1 of 5 0 eee eee eee e nee ees 95 Options Setup page 20D ws et A ed ae ek selene e eee Ee Seaweed 96 Options setup page 3 OL it wd ee DS Pet el ened whee eee Oh ed bag 97 Options Setup PALAOS E hee A aca ea 98 Options setup paged OD A Ae Bd ae nde ea eee A Add 99 TABLES Keyboard icons and functions 3 User MENU ICONS A A ee vey RAE ae DOA ee a oe a 9 Service MENU ICONS yk ete eek eee eo EG A ah ek e ee AA oR RR Ba 10 Reheat configuration types 25 Parameters for infrared humid
34. 485EXI IS IPBML Modbus IP BacNet available soon OC485 LBDS Modbus RTU 485 IGMNet Extended ISWEB LBDS SNMP HTTP The newer communication cards support the latest information available through Liebert iCOM Previous Liebert IntelliSlot cards should be used for legacy information PA1 04 022 STD and Older Velocity V3 54 User Menu Parameters 7 0 USER MENU PARAMETERS User menus report general cooling unit operations and status The user menu password is 1490 The User menu parameter tables in this manual may differ from the display on your cooling unit The Liebert iCOM functions with several Liebert Precision Cooling units each with its own set of control commands In addition the Liebert iCOM firmware is being updated constantly As a result the User menu parameter tables in this manual may differ from the display on your cooling unit Check www liebert com for the latest Liebert iCOM user manual updates Figure 36 User menu icons USER HENS CF ite lo User Menu password 1490 none Figure 37 Setpoints screen SETPOINTS 4 UNIT 01 gt PASSWORD Actual Level 0 PPR Temperature Setpoint T F Humidity Setpoint 50 0 Humidity Control Type Relative Supply Sensor Control Supply Setpoint 50 F Backup Temperature Setpoint 13 F 4 for next previous unit gt to select parameter then gt to change parameter to confirm Temperature Setpoint Selects a tem
35. ARAMETERS 0ccccccoccc eee e ween eee eee eee eee eee 55 8 0 SERVICE MENU PARAMETERS 00 ccc cee e eee eee e eee eeneeeuneeeenennae 62 FIGURES Figure 1 Liebert iCOM components 1 Figure 2 Liebert iCOM display components 2 Figure 3 Status menu large display graphical vieW eee nen eens 4 Figure 4 Liebert iCOM default screen symbols oooo oooooooroorr eee eens 4 Figure 5 Menu tree Small display stand alone or networked 0 0 ccc eee eens 5 Figure6 Entering a password 7 Figure 7 Menu tree Large display stand alone 1 0 0 0 nor 7 Figure 8 Menu tree Large display networked 0 0 ccc rr 8 Fig re 97 User menu ICONS aee irn iy A td Ad aaa ag a anar heen dhs 9 Figure 10 Service Menu ICONS muito Da ahaa esse des ee Dace a made wa Hae dhe Sea Talay wea Dale a ee 10 Figure 11 Start stop priority switches 0 0 ee eee e ene tenes 12 Figure 12 Temperature proportional band 0 cc eee eee een neees 18 Figure 13 One single step compressor without unloaders 0 0 0 cc eee 19 Figure 14 Two single step compressors without unloaders or one compressor with an unloader EWOSStE PL as ar a ari de dd ua 20 Figure 15 Two compressors with unloaders four step ence ne ees 20 Figure 16 Digital scroll capacity modulation 10 100 variable o oooooooooorrraoo ooo 21 Figure 17 Single and dual digital scroll compressor activation POMtS o o
36. Bonus 4 for next previous unit then to change parameter 4 UNIT 1 2207 7 22hrs 188min 1 24 0 0 to select parameter to confirm 70 Service Menu Parameters Figure 56 Wellness Compressor 1 settings screen page 3 of 8 WELLNESS compressor1 settings page 30f8 UNIT 1 PASSWORD Actual Level 0 2227 Number of Starts 3 Run Hours 7hrs Average Run Time 140min Starts per Day Best 12 Starts per Day Worst 240 Number of HP Alarms 0 Number of LP Alarms Number of OL Alarms Number of DS HT Alarms Actual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm Figure 57 Wellness Compressor 2 settings screen page 4 of 8 WELLNESS compressor2 settings page 4 of8 4 UNIT 1 PASSWORD Actual Level 0 222 Number of Starts 3 Run Hours 7hrs Average Run Time 140min Starts per Day Best 12 Starts per Day Worst 240 Number of HP Alarms 0 Number of LP Alarms Number of OL Alarms Number of DS HT Alarms Actual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm 71 Service Menu Parameters Figure 58 Wellness Electric heater 1 settings screen page 5 of 8 WELLNESS el heater 1 settings page 5 of 8 4 UNIT 1 gt PASSWORD Actual Level 0 Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of HP Alarms A
37. E Precision Cooling For Business Critical Continuity Liebert COMO User Manual Intelligent Communications amp Monitoring for Liebert Challenger 3000 Liebert Challenger ITR Liebert CW Liebert DS Liebert PeX with Software Version PA1 04 033 STD 4 EMERSON Network Power 1 0 1 1 2 0 2 1 3 0 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 TABLE OF CONTENTS INTRODUCTION sce ia oe ete ls ei Se a Be a ie tee et 1 He atures Orit a a GA tata ht told nosed A a eee Be en od Fe ae Be 1 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS 0000 cece eu euuueeuee 2 Navigating Through the Liebert iCOM Menus 0 0 e cece eee eens 5 Dil Control Interface ii Si eee be ees oe is oa 5 2 12 Accessing SUbMenUS s rrr rae aei A TR Rete it Bape OG PE Rha 5 2 37 Entering a Password Aara IAE wicca SEE IO ee a EN RS OIE I 6 2 1 4 Viewing Multiple Units with a Networked Large Display oooooooooo o ees 8 OPERATION ui A ee eee a ete aa eee 12 Single Unit Functions mii A A eee A at 12 Sal Unit Fan Control ir A dt EA A A aE ed 12 3 1 2 General Compressor Requirements 15 3 1 3 Compressor Timing Short Cycle Protection 0 0 00 ccc moore 16 3 1 4 Compressor Sequencing on Two Compressor UnitS ooo oooooooooooooo ooo 17 3 1 5 Motorized Ball Valve in Water Cooled Units 0 0 0 ccc cee ene eee 17 3 1 6 MBV Operation After Compressor is Turned Off
38. EMP DISAB SY LOW SUP TEMP DISAB Figure 78 iCOM DO overview and override screen page 1 of 3 COM DO Overview and Override pg 1 of 3 4 UNIT 01 gt SVP PASSWORD Actual Level 3 222 iCOM DO 0 connected Override 0 4 for next previous unit to select parameter then gt to change parameter to confirm Liebert iCOM DO Shows the connection status of a Liebert iCOM DO card It displays connected when a Liebert iCOM DO card has been set up and connected to the Liebert iCOM via the CAN bus Override Permits manual testing the Liebert COM DO by activating each output on the following screen 87 Service Menu Parameters Figure 79 iCOM DO events setup screen page 2 of 3 COM DO Events Setup pg 2 of 3 4 UNIT 01 gt SE PASSWORD Actual Level 3 222 732 10 Pouput Status SY Cooling Status SE Heating Status Ne SIE Humidifying Status No 10 SIE Dehumidifying Status No 11 Syeya High Temperature No 12 SE High Humidity No 13 SY Low Temperature No 14 SE Low Humidity No 15 S741 4 for next previous unit gt to select parameter then gt to change parameter to confirm 22000000 Status Shows whether an output is in a normally closed or normally open state Output Shows which output is tied to a particular alarm The default values are set to be the same output as the Liebert ENV DO card the predecessor to the Liebert COM DO ID Displays the number of the Li
39. M and Liebert PeX only Reduces humidifier capacity to be a percentage of nominal humidifier capacity on units with variable capacity steam bottle humidifiers Humidifier Control Used for Liebert HPM and Liebert PeX units only Humidifier Bottle Flush Time Used for Liebert HPM and Liebert PeX units only Humidifier Bottle Manual Flush Used for Liebert HPM and Liebert PeX units only Dehumidification Enabled Selects whether the compressor and or valve will be used to dehumidify when the humidity is above setpoint Auto Restart Enabled Restarts the unit after a power cycle when set to Yes When this parameter is set to No the unit will not restart Turn On after a power cycle Single Unit Auto Restart Sets a time delay for the unit to restart when the Auto Restart Enabled is set to Yes The delay begins once the boot process has completed This parameter allows units to be staggered On to reduce the amount of simultaneous power consumption after a loss of power On Off Enabled Disables the power button on the front of the display The default configuration is Op 96 Service Menu Parameters Figure 90 Options setup page 3 of 5 OPTIONS SETUP page 3 of 5 4 UNIT 01 PASSWORD Actual Level 3 CW Flush Freecooling Flush Hot Water Flush Ball Valve Setpoint Offset Heaters Outputs as CW Valve Control Main Valve Auto Valve Rotation Valve Rotation Hour Dehum Operation 4 for nex
40. Number of Standby Units Selects the number of units that will be in Standby mode When a unit is in standby mode the fan will be Off and no cooling will be provided Rotation Frequency Controls when a rotation will occur between the standby units and the operating units within a network Rotate at hour Sets the hour of the rotation Rotate at minute Sets the minute of the rotation Rotate by Determines the number of positions to rotate by Example If there are 6 units in a unit to unit network and units 1 3 and 5 are in standby and this parameter is set to 1 then at the next rotation units 2 4 and 6 will be placed in standby and units 1 3 and 5 will become operational Cascade Units Allows units to activate in Standby mode if the room temperature cannot be maintained by the non standby units If Yes is selected the cascade units can perform all functions when activated from standby This parameter can also be set for Cooling Only or Cool Heat only Start all Standby Units by HT Activates all units to cool when a High Temperature Alarm occurs See 3 10 1 Calculating Next Maintenance and Diagnostics for details on these menus 69 Service Menu Parameters Figure 54 Wellness Basic settings screen page 1 of 8 WELLNESS basic settings page 1 of 8 PASSWORD Actual Level 0 Maintenance Frequency Per Year Max Bonus Max Penalty Last Maintenance Service Engineer Confirm PM Calculated Ne
41. Selects a temperature setpoint that will be activated in the event of a customer input signal configured as the 2nd Setpoint The customer input must be configured for this parameter to activate This parameter is adjustable from 41 104 F 5 40 C The factory default setting is 73 F 22 7 C Backup Temperature Setpoint Selects a temperature setpoint that will be activated in the event of a BMS Timeout The BMS timer must be configured for this parameter to activate This parameter is adjustable from 41 104 F 5 40 C The factory default setting is 73 F 22 7 C Heaters Deadband Changes the amount of deviation below the temperature setpoint that the heaters will cycle On and Off on Liebert HPM units This value is added to the heating side of the normal temperature deadband 63 Service Menu Parameters Figure 48 Setpoints screen page 2 of 6 SETPOINTS pg 2 of 6 4 UNIT 01 PASSWORD Actual Level 0 2 Humidity Setpoint 50 Humidity Control Type Relative Humidity Proportional Band 10 0 Humidity Integration Time Omin Humidity DeadBand 0 0 Dehum Heat Low Limit 1 3 F Dehum Heat Low Limit 2 7 F 4 for next previous unit gt to select parameter then gt to change parameter to confirm Humidity Setpoint Selects a humidity that the cooling unit will maintain by removing or adding moisture to the air This parameter is adjustable from 20 80 The factory default setting is 50 Humidity C
42. Settings Spare Part List Unit Diary Compressor Info Event Log Standby Settings Lead Lag Access Passwords Graphics Maintenance Wellness Settings View Network Diagnostics Service Mode Set Alarms Set Alarms Sensor Data Sensor Calibration Setup Active Alarms System Network Setup Display Setup Options Setup Total Run Hours COM DO Sleep Mode Service Contact Info Service Contact Info Liebert iCOM Display Components and Functions 2 1 4 Viewing Multiple Units with a Networked Large Display When you first wake up the control press the Esc key to return to the System view Status menu This view shows an average of all the units on the network and any alarms present To view a specific unit on the network press either the enter key or down arrow key When you do this you will see the word System in the top left of the screen change to a unit number Using the left and right arrow keys you can toggle through the various units on the network To go back to the System view or back one level from any menu in the control press the Esc key Figure 8 Menu tree Large display networked Unit or System will be displayed in the top left corner of the screen Status Menu System View Networked Large Display Only Status Menu Status Menu Unit 1 View Unit 2 3 4 User Menu Service Menu Advanced Menu Unit Unit Unit Password Password Password Setpoints Setpoints Factory Settings Spare Part List Unit Di
43. Switch Position Off Table 10 Analog connection control board switch position Switches 9 and 10 not applicable to Liebert CW or to Liebert DS Analog Input Input 1 Input 2 Input 3 Input 4 Control Board Switch Number 1 2 3 4 5 6 7 8 0 to 10VDC Off Off Off Off Off Off Off Off Analog Input Device Value 0 to 5VDC On Off On Off On Off On Off 4 to 20mA On On On On On On On On Switches 9 and 10 not applicable to Liebert CW or to Liebert DS 37 Operation 3 9 4 Liebert iCOM DO The Liebert iCOM DO is an optional discrete output relay card that can be connected to the Liebert iCOMs for providing dry alarm contact outputs for monitoring systems The Liebert COM DO is a direct replacement of the Liebert ENV DO card that was supported on previous Liebert control systems The Liebert iCOM DO allows simultaneous use of the Liebert Intellislot cards as the Liebert COM DO communicates over the CANbus network instead of the IGMnet interface Liebert iCOM DO card provides up to 15 configurable alarms through relay outputs For the ratings and additional data refer to the Liebert iCOM DO manual SL 28096 Each alarm output has 3 terminals N C N O and common The Liebert COM DO setup can be found in the Service Liebert COM DO menu large display only The Liebert iCOM DO is pre configured and its present is automatically detected by the Liebert iCOM once it is connected t
44. Y Y4 DIGI SCROLL1 HIGH TEMP ENABLE SY DIGI SCROLL2 HIGH TEMP ENABLE SY EL HEAT HIGH TEMP 5 ENABLE 85 Service Menu Parameters Figure 75 Set alarms screen page 6 of 8 SET ALARMS page 6 of 8 UNIT 01 gt 30 PASSWORD Actual Level 0 DELAY EN DIS ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE 514 WORKING HRS EXCEEDED SY SMOKE DETECTED 58 WATER UNDER FLOOR SY COND PUMP HIGH WATER MJ LOSS OF FLOW S274 STBY PUMP ON SJ STANDBY UNIT ON ENABLE 59 HUMIDIFIER PROBLEM ENABLE SZM NO CONNECTION wUnit1 ENABLE S S UNIT X DISCONNECTED ENABLE LOSS OF POWER DISAB 0 2 2 2 5 2 2 2 Figure 76 Set alarms screen page 7 of 8 SET ALARMS page 7 of 8 UNIT 01 gt ETE PASSWORD Actual Level 0 DELAY EN DIS ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE ENABLE SA CUSTOMER INPUT 1 SAS CUSTOMER INPUT 2 SZA CUSTOMER INPUT 3 SA CUSTOMER INPUT 4 SY CALL SERVICE 5 40 HIGH TEMPERATURE SAY LOSS OF AIR BLOWER 1 Sieve REHEAT LOCKOUT SY HUMIDIFIER LOCKOUT Sad FC LOCKOUT SY COMPRESSOR LOCKOUT 2 2 2 2 2 2 2 2 2 2 2 86 Service Menu Parameters Figure 77 Set alarms screen page 8 of 8 SET ALARMS page 8 of 8 UNIT 01 gt 54308 PASSWORD Actual Level 0 EN DIS SY 9 COMP 1 SHORT CYCLE ENABLE SY COMP 2 SHORT CYCLE ENABLE SY NO POWER DISAB SZI CONDENSER 1 FAILURE ENABLE SZA CONDENSER 2 FAILURE ENABLE SY EC FAN FAULT ENABLE SAY HIGH SUP T
45. according to the type of unit chilled water single or dual compressor NOTE Before the proportional or integral setpoints can be changed the Auto Set Enable must be changed to NO 3 2 2 Compressor Control Depending on its type a Liebert Precision Cooling unit may have one or two compressors with or without unloaders or variable capacity Compressor Proportional Bands One Single Step Compressor Without Unloaders One Step One single step compressor Cool 1 is started at 100 call for cooling from the temperature proportional band and stopped at 0 see Figure 13 Figure 13 One single step compressor without unloaders Temp Setpoint 70 F Proportional Band 8 F Cool 1 Deadband 2 F On Cool 1 i Y Dead band 72 73 74 1 0 gt E 100 Cooling Y Proportional Band Cooling Increasing Temperature 19 Operation Two Single Step Compressors Without Unloaders Two Step First single step compressor Cool 1 is started at 50 calculated output from the temperature proportional band and stopped at 0 The second compressor Cool 2 starts at 100 and stops at 50 see Figure 14 One Compressor With an Unloader Two Step The two step compressor is started unloaded at 50 Cool 1 calculated output from the temperature proportional band and stopped at 0 At 100 the compressor starts fully loaded Cool 2 and returns to unload operation at 50 see Figure 14 Figure 14 Two
46. action A terminal strip is provided in the cooling unit to connect your contact closure to You have the ability to set the control to react on an open or closed contact A NOTE To enabled disabled delay activation and set event type alarm warn message see Event Types on page 34 Table 8 Customer inputs Setting Reaction Smoke Event Only Water Alarm Event Only C PMP Alarm Event Only Flow Alarm Event Only Stdby G Pmp Event Only Stdby Unit Event Only C Input 1 Event Only C Input 2 Event Only C Input 3 Event Only C Input 4 Event Only Rht Lockout Hum Lockout Event Electrical Heaters Disabled Event Humidifier Disabled Rht Hum Lock Event Electrical Heaters and Humidifier Disabled Comp Lockout Event Compressor s Disabled w o Pump Down Call Service Event Only High Temp Event Only Air Loss Event Only FC Lockout Event Free Cooling Disabled Heater Alarm Event Heaters Off Liebert PeX Only Flow AL SD Event Shut Down the Unit Flow AL LC Event Lockout Compressors No Pump Down enabled only if at least one compressor is on auto reset depends on input status Comp Lock PD Event Compressor s Disabled w Pump Down Enable FC Forces Free Cooling to On HTRJ VFD Activates the HEAT REJ VFD ALARM no other function HTRJ TVSS Activates the HEAT REJ TVSS ALARM no other function 36 Operation 3 9 3 Analog Inputs
47. al the MBV position will be maintained as set Emerson recommends against manually setting the MBVs during compressor operation because it might cause the compressor to trip on its high or low pressure protection controls Analog Out 1 2 3 4 Specifies the analog output percentage subsequently controlling the device connected to that output Range is 0 to 100 but also depends on the output s assignment in factory settings 77 Service Menu Parameters Figure 66 Diagnostics service mode screen page 5 of 8 DIAGNOSTICS SERVICE MODE page 5 of 8 4 UNIT 01 Status Remote Shutdown Status Airflow Loss Status Motor Overload EC Fan Fault Status Filter Status Customer Input 1 Status Customer Input 2 Status Customer Input 3 Status Customer Input 4 4 for next previous unit to select parameter then gt to change parameter to confirm Status Remote Shutdown Shows the status of the unit s remote shut down input Status Airflow Loss Shows the status of the unit s air proof switch Status Motor Overload EC Fan Fault Shows the status of the unit s main fan overload or EC fan fault input Status Filter Shows the status of the unit s filter clog switch input Status Customer Input 1 2 3 4 Shows the status of the unit s customer inputs Status Heaters Safety Liebert HPM and Liebert PeX only Shows the status of the unit s reheat safety switch Loss of Airflow at Liebert HPM
48. al Band SER Reheat On JO ig TO Cooling 2 On Standard Mode In Standard mode the SCR reheat operates only when the Temperature Proportional Band calls for heating SCR reheat output is adjusted proportionally as the Temperature Proportional Band varies the requirement for heating from 0 to 100 Compressors operate only when there is a call for cooling as described in 3 2 2 Compressor Control Figure 23 illustrates how SCR reheat operates when SCR Control Type is set to Standard mode 26 Operation Figure 23 Two single step compressors with SCR reheat set to Standard mode Temp Setpoint 70 F scH Off Off 1 Y Proportional Band Cooling 2 On Proportional Band 8 F Cool 2 Deadband 0 F Cool 1 On On SCR i On 1 l l 66 67 68 69 70 71 72 73 wN 1 100 o 100 Heating i Cooll1 Off Cobl 2 1 Cooling l l l Y Proportional Band NOTE Using SCR in Standard mode in conjunction with variable cooling capacity e g chilled water valve or digital compressor provides ultimate capacity control and energy efficiency gains 3 5 Humidity Control The control uses the humidity proportional band to determine which operation to perform dehumidification humidification and how much capacity to provide The Humidity Proportional Band is a user defined range that is divided into two equal parts for dehumidifying and humidifying The Humidity Setpoint is located between these two equal parts A
49. al Band fo 200 Cooling Band1 2 Source Band 2 Compressors Cooling Increasing Temperature Minimum Chilled Water Temperature This feature permits the user to select the minimum chilled water temperature that allows simultaneous operation of the second cooling source chilled water valve control and compressor control This feature is enabled in the Service menu under Setpoints parameter Minimum CW Temp If the water temperature is below this minimum chilled water setpoint parameter Minimum CW Temp Value Service Menu Setpoints the control will operate ONLY the second cooling source control i e the compressor is locked out Above the minimum chilled water setpoint assuming the fluid temperature is below the return room air temperature delta T between room and glycol true the control will operate the second cooling source control and compressor control simultaneously if needed If the Minimum CW Temp is disabled the second cooling source temperature is ignored the control will always operate the second cooling source and compressors simultaneously when the load requires it GLYCOOL Cooling Free Cooling When GLYCOOL cooling is available the temperature control will calculate a total cooling requirement of 200 rather than 100 Assuming that full GLYCOOL capacity is available the GLYCOOL valve opens proportionally as the requirement for cooling rises from 0 to 100 If more than 100 cooling is required then the com
50. al reference sensor is connected to the Liebert COM controller area network CAN bus the Sensor B temperature value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Optional Sensor B2 When an optional reference sensor is connected to the Liebert COM controller area network CAN bus the Sensor B humidity value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Optional Sensor C1 When an optional reference sensor is connected to the Liebert COM controller area network CAN bus the Sensor C temperature value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Optional Sensor C2 When an optional reference sensor is connected to the Liebert COM controller area network CAN bus the Sensor C humidity value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Freecooling Fluid Temperature Displays the temperature of the incoming water on units equipped with a free cooling coil Outdoor Temperature Reads the outdoor temperature for free cooling and dual cool units to determine if cooling can be provided without compressor operation Available only on Liebert HPM units Freecooling Status Displays if free cooling is available for use based on the return air temperature and the incoming fluid temperature Digital Scroll 1 Temperature Shows the actual digital scroll number 1 discharge temperatu
51. alc no ALM COMP 2 LOW PRESSURE Internal Calc no ALM COMP 1 PUMPDOWN FAIL Internal Calc no ALM COMP 2 PUMPDOWN FAIL Internal Calc no ALM DIG SCROLL1 HIGH TEMP Internal Calc no ALM DIG SCROLL2 HIGH TEMP Internal Calc no ALM EL HEAT HIGH TEMP 5 Sec 0 sec 0 9999 WRN WORKING HRS EXCEEDED 0 Sec 0 sec 0 9999 Fixed to WRN SMOKE DETECTED 2 Sec 2 sec 0 9999 ALM WATER UNDER FLOOR 2 Sec 2 sec 0 9999 ALM COND PUMP HIGH WATER 2 Sec 2 sec 0 9999 ALM LOSS OF FLOW ae Bee ree 2 sec 0 9999 ALM STBY GLYCOL PUMP ON 2 Sec 2 sec 0 9999 ALM STANDBY UNIT ON 2 Sec 2 sec 0 9999 ALM HUMIDIFIER PROBLEM 2 Sec 2 sec 0 9999 ALM NO CONNECTION w Unit1 Internal Calc WRN UNIT X DISCONNECTED Internal Calc WRN LOSS OF POWER 0 Sec No ALM CUSTOMER INPUT 1 2 Sec 2 sec 0 9999 ALM CUSTOMER INPUT 2 2 Sec 2 sec 0 9999 ALM CUSTOMER INPUT 3 2 Sec 2 sec 0 9999 ALM CUSTOMER INPUT 4 2 Sec 2 sec 0 9999 ALM CALL SERVICE 2 Sec 2 sec 0 9999 MSG HIGH TEMPERATURE 2 Sec 2 sec 0 9999 MSG LOSS OF AIR BLOWER 1 2 Sec 2 sec 0 9999 ALM REHEAT LOCKOUT 2 Sec 2 sec 0 9999 WRN HUMIDIFIER LOCKOUT 2 Sec 2 sec 0 9999 WRN FC LOCKOUT 2 Sec 2 sec 0 9999 WRN COMPRESSOR S LOCKOUT 2 Sec 2 sec 0 9999 WRN COMP 1 SHORT CYCLE 0 Sec 0 9999 MSG COMP 2 SHORT CYCLE 0 Sec 0 9999 MSG 35 Operation 3 9 1 3 9 2 High and Low
52. ale to female coupler is provided with the unit Connect the red crossover cable which is provided with the cooling unit between the coupler and the P64 port on the back of the large display see Figure 34 If the female to female coupler is not provided connect the straight through cable to Port P64 on the large display NOTE A female to female coupler is factory supplied on some cooling units equipped with a large display 48 Installing a Liebert iCOM Unit to Unit Network Figure 31 U2U network setup diagram Display Service Network Liebert Com Display Menu IP Address 192 168 001 001 U2U Address 33 Group 1 TA AA AA Display Service Network Display Service Network Liebert Cooling Unit Liebert Cooling Unit Control Board Menu Control Board Menu IP Address 192 168 001 003 IP Address 192 168 001 002 U2U Address 2 U2U Address 1 Group 1 Group 1 Switch Display Service Network Liebert Cooling Unit Control Board Menu IP Address 192 168 001 004 U2U Address 3 Group 1 49 Installing a Liebert iCOM Unit to Unit Network Wall Mount Large Display Only large displays can be used for remotely monitoring and controlling cooling units connected on the same network Each wall mount large display requires 120VAC or 230VAC input power Liebert provides an AC adapter wall plug A straight through Ethernet cable must be connected between the network s
53. ange parameter PASSWORD Actual Level 0 Analog Input 1 Start Point Analog Input 1 End Point Analog Input 2 Start Point Analog Input 2 End Point Analog Input 3 Start Point Analog Input 3 End Point Analog Input 4 Start Point Analog Input 4 End Point 4 UNIT 01 gt Y Y Be CC BIE EE to select parameter 4 to confirm Only characteristics for analog inputs used for custom sensors are visible in this menu Start Points Lines 446 448 S450 and S452 Represent the starting point of each analog input s linear characteristic The column on the left indicates the desired readout at the lowest allowable sensor voltage and the column on the right indicates the lowest sensor voltage End Points Lines S447 S449 S451 and S453 Represent the finish point of each analog input s linear characteristic The column on the left indicates the desired readout at the highest allowable sensor voltage and the column on the right indicates the highest sensor voltage The range of allowable voltages is dictated by the Precision selection for that analog output on Page 4 of the Options Setup screen of the Service Menu see Figure 91 If the precision of Analog Input 1 is set to 0 5V on line S436 the voltage selection on line 447 will not be allowed to go above 5 0V The range of the readout start finish points is dictated by the units system selection on line S441 The range for each is shown in the table below
54. ary Compressor Info Event Log Standby Settings Lead Lag Access Passwords Graphics Maintenance Wellness Settings View Network Diagnostics Service Mode Set Alarms Set Alarms Sensor Data Sensor Calibration Setup Active Alarms System Network Setup Display Setup Options Setup Total Run Hours iCOM DO Sleep Mode Service Contact Info Service Contact Info Liebert iCOM Display Components and Functions Figure 9 User menu icons G User Menu password 1490 Table D menu icons Available Icon Name Description On Display C F RH Setpoints View and change temperature and humidity setpoints Small amp Large SET A Spare Part List Displays the various part numbers of the Large components parts in the cooling unit pil Event Log Contains last 400 events Small amp Large Graphics Displays temperature and humidity graphs Small 8 Large i View Network Shows status of all connected units Large SET Set Alarms Allows enable disable and settings for alarms Small amp Large ALARMS SO Sensor Data Shows readings of standard and optional sensors Small 8 Large IN Active Alarms Allows the user to view all current active alarms Small 8 Large ACTIVE ALARMS Display Setup Change settings for display language time simple or Small amp Large we graphic view Liebert iCOM Display Components and Functions Table 2 User me
55. at have been modified from the factory defaults to an internal file that can be downloaded uploaded using the Liebert iCOM Service Tool Selecting Save will write the settings to the internal storage file and selecting Load will write the settings from the internal storage file to the application software The internal file is updated every 12 hours automatically Network Safe Saves or loads network settings for the control board that have been modified from the factory defaults to an internal file that can be downloaded uploaded using the Liebert COM Service Tool Selecting Save will write the settings to the internal storage file and selecting Load will write the settings from the internal storage file to the application software SW Version Contains the application software version loaded onto the Liebert iCOM control board 93 Service Menu Parameters Figure 87 System network setup screen Unit page 2 of 2 SYSTEM NETWORK SETUP page 2 of 2 UNIT 01 PASSWORD Actual Level 3 222 Monitoring Protocol Velocity IP Address 192 168 254 001 Netmask 255 255 255 000 Gateway 0 000 000 000 MAC 00 00 68 1E 8E 92 U2U Protocol GBP U2U Address 1 U2U Group 1 Bootloader Variables Changed No SN Static RAM OK No Attention any changes done on these parameters must be followed by a Save Reboot command Monitoring Protocol Selects the monitoring protocol Velocity V4 is the factory default that will p
56. ates the same as the V1 V2 100 open For an optional secondary valve operates the same as the V1 Current V2 Feedback For an optional secondary valve operates the same as the V1 81 Service Menu Parameters Figure 70 Set alarms screen page 1 of 8 SET ALARMS page 1 of 8 UNIT 01 gt PASSWORD Actual Level 0 2297 Return Sensor Alarms Enable High Return Temperature 80 F Low Return Temperature 65 F High Return Humidity 60 Low Return Humidity 40 Sensor A Alarms Disable High Temperature Sensor A F Low Temperature Sensor A F High Humidity Sensor A SAME Low Humidity Sensor A 4 for next previous unit gt to select parameter then gt to change parameter to confirm Return Sensor Alarms Enables and disables the return temperature and humidity sensor alarms Factory default is set to enable High Return Temperature Sets the threshold temperature when a return high temperature alarm will occur Low Return Temperature Sets the threshold temperature when a return low temperature alarm will occur High Return Humidity Sets the threshold humidity when a return high humidity alarm will occur Low Return Humidity Sets the threshold humidity when a return low humidity alarm will occur Sensor A Alarms Enables or disables the alarms associated with Sensor A if the unit is equipped with the optional temperature humidity sensor High Temperature Sensor A Sets the threshold temper
57. ature when a Sensor A high temperature alarm will occur Low Temperature Sensor A Sets the threshold temperature when a Sensor A low temperature alarm will occur High Humidity Sensor A Sets the threshold humidity when a Sensor A humidity alarm will occur Low Humidity Sensor A Sets the threshold humidity when a Sensor A low humidity alarm will occur 82 Service Menu Parameters Figure 71 Set alarms screen page 2 of 8 SET ALARMS page 2 of 8 UNIT 01 gt PASSWORD Actual Level 0 222 SYA Supply Sensor Alarms Disabled SYACS High Supply Temperature F SAL Low Supply Temperature F 4 for next previous unit e gt to select parameter then gt to change parameter to confirm Supply Sensor Alarms Enables or disables the supply sensor alarms If the unit is not equipped with a supply temperature sensor then this parameter will show Disabled High Supply Temperature Sets the high supply temperature threshold that will trigger a High Supply Temperature alarm Low Supply Temperature Sets the low supply temperature threshold that will trigger a Low Supply Temperature alarm 83 Service Menu Parameters Figure 72 Set alarms screen page 3 of 8 SET ALARMS page 3 of 8 UNIT 01 522 PASSWORD Actual Level 0 277 SY Customer Input 1 Water Alarm 5224 Customer Input 1 active when Closed WARNING ACTIVATES ALARM RELAY SY274 Water Alarm Shuts Unit Down SY Reset Disabled Alarms 23
58. by unit layout example 10 Precision Cooling units in room 0 00 eee eee 45 Connecting two cooling units each with a small display using a crossover Ethernet cable 48 U2U network setup diagrama 49 Wiring a small display for stand alone operation 0 00 c cece eee een eens 50 Wiring a small display for U2U network operation 0 0000 cece eee ene 51 Wiring a large display for U2U network operation 0 00 cee eee eens 52 Liebert vNSA with optional remote large display 0 0 c ccc ee eens 53 USEF MEN WIGONS ainai e a dr e deeb de tol tajo ocd 55 SELPOMtS sereen A 55 Set alarms screen page lo 56 Setvalarms screen PASO Di A AA nee ey a E ee eee ee eee 57 Sensor data scre ns page li a Bi a eee WON RP a AES BR a 58 Sensor data screen page 2 return only 0 ce eee eee e eens 59 Sensor data screed page ii see ek were ah eed iS Dek a ee cen be ee a Re de 59 Display Setup screens nk wee ke ee ein eee hind jae aoe eee Ghee alata 60 Totaltun HOUrS SCreea os sesamin o sof tenet a xl ote ae ales ala Seach eis ee aonb len a ET 61 Sleep mode screens iN estes eros aos Sh bee ea he enn nde bie aya bles seas 61 Service Menu Main Screen 62 Setpoints screen page 1 of 6 ooo 63 Setpoints screen page 2 ob 64 Setpoints screen page Bob 65 Setpoints screen page toba 66 Setpoints screen page bob 67 Setpoints screen page Bob 68 Standby settings lead lag screen 69 Wellness
59. cation With Comp Setting 1 2 and 1 or 2 the reheats will operate in the same manner as they do for Staged as described below Delayed is the default setting for Liebert DS units Staged This setting applies to one or two compressor units Electric heaters will stage as described in 3 4 1 Electric Hot Gas and Hot Water Reheat Staged is the default setting for Challenger 3000 units On two compressor units with staged reheat selected and Dehumidification With Comp set to BOTH the control allows for operating two compressors and reheats simultaneously It is important that electrical service to the unit be sized and wired for this option if selected WARNING If the electrical service to the unit is not properly sized it could trip the building circuit breakers or fuses or in extreme cases damage the building wiring This Warning applies only when the Dehumidification With Comp is set to BOTH and the Electric Reheat Operation is set to Staged Consult factory before making any changes to the default settings Control Types Temperature and Humidity Control Types The Liebert COM has three Temperature and Humidity Control Types e Proportional gt PI Intelligent Each control type affects the timing and intensity of the cooling heating and humidifying dehumidifying operations The Control Type parameter is in the Service menu under Setpoints Proportional TIf Proportional Control is selected the percent cooling heating re
60. creen page 2 SET ALARMS page 2 of 2 4 UNIT 01 2772 Disabled F F 4 for next previous unit to select parameter then gt to change parameter to confirm Supply Sensor Alarms Enables or disables the supply sensor alarms When enabled the supply temperature and humidity values will be compared to a high and low setting High Supply Temperature Sets the temperature at which the High Supply Temperature Alarm is activated Low Supply Temperature Sets the temperature at which the Low Supply Temperature Alarm is activated 57 User Menu Parameters Figure 40 Sensor data screen page 1 SENSOR DATA page 1 of 3 4 UNIT 01 Optional Sensor A 1 Optional Sensor A 2 Optional Sensor B 1 Optional Sensor B 2 Optional Sensor C 1 Optional Sensor C 2 Freecooling Fluid Temperature Outdoor Temperature Freecooling Status DigiScroll 1 Temperature DigiScroll 2 Temperature This window is READ ONLY Optional Sensor Al When an optional reference sensor is connected to the Liebert iCOM controller area network CAN bus the Sensor A temperature value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Optional Sensor A2 When an optional reference sensor is connected to the Liebert iCOM controller area network CAN bus the Sensor A humidity value will be shown A reference sensor can be connected to any type of Liebert iCOM unit Optional Sensor B1 When an option
61. ctual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm Figure 59 Wellness Electric heater 2 settings screen page 6 of 8 WELLNESS el heater 2 settings page 6 of 8 4 UNIT 1 gt PASSWORD Actual Level 0 Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of HP Alarms Actual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm 72 Service Menu Parameters Figure 60 Wellness Electric heater 3 settings screen page 7 of 8 WELLNESS el heater 3 settings page 7 of 8 4 UNIT 1 gt PASSWORD Actual Level 0 Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of HP Alarms Actual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm Figure 61 Wellness Humidifier settings screen page 8 of 8 WELLNESS humidifier settings page 8 of 8 4 UNIT 1 gt PASSWORD Actual Level 0 Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of Alarms Actual Bonus 4 for next previous unit gt to select parameter then gt to change parameter to confirm 73 Service Menu Parameters Figure 62 Diagnostics service mode screen page 1 of 8 DIAGNOSTICS SERVICE MODE page 1 of 8
62. d will appear There is a re pump down if the LP device opens again after the compressor has been already stopped a maximum of six re pump down cycles per hour are allowed At the seventh request of re pump down the alarm Comp 1 Pumpdown Fail or Comp 2 Pumpdown Fail will appear and the compressor will be locked out Pump down is always performed loaded for compressors with unloaders unloaders off digital scroll control solenoid valve disabled For digital scroll only when pump down has finished successfully LP device opened pump down will be continued for another half second with the control solenoid valve energized 15 Operation High Pressure Alarm When the compressor is initially activated the system will be monitored for a high pressure situation When a high pressure situation is detected during the first 10 minutes of operation the unit will attempt to correct the problem several times without notification If the unit is unsuccessful in correcting the problem an alarm will occur and the affected compressor will be locked off If high head pressure alarm trips three times in a rolling 12 hour period the affected compressor will be locked off After the compressor has been running for 10 minutes if a high head pressure situation is detected an alarm will occur and the affected compressor will be immediately locked off without the unit trying to correct the problem Once the compressor is locked o
63. d to O or 1 minute on water cooled units When this time is expired a second timer starts to operate if the low pressure input is active This second timer is active during normal compressor operation to avoid compressor trips due to bubbles in the refrigerant or other influences creating short trips of the low pressure switch The low pressure device input is ignored if the compressor is not operating Exception Pump Down see Pump Down NOTE Low pressure condition could be read through contacts or through pressure transducers with threshold setting Pump Down Pump Down is applicable to compressorized systems if equipped for pump down operation which is set at the factory This operation prevents the compressor oil from being diluted with liquid refrigerant to ensure that the compressor is properly lubricated for the next startup The Pump Down operation operates in the following manner Whenever the control determines that no more cooling is required and a compressor needs to be shut off the liquid line solenoid valve LLSV is closed de energized The compressor will continue to operate until the low suction pressure device LPS or LPT opens which shuts off the compressor If the LP device does not open within a specified time the LLSV is turned On then back Off the assumption is that the LLSV is stuck If after three times the LP device does not open the compressor and LLSV are locked off and an alarm Pump Down not complete
64. difier Current Shows the amount of AC amperes the humidifier is consuming if the unit is equipped with an optional the steam generating humidifier 76 Service Menu Parameters Figure 65 Diagnostics service mode screen page 4 of 8 DIAGNOSTICS SERVICE MODE page 4 of 8 4 UNIT 01 PASSWORD Actual Level 0 Alarm Relay K11 Relay 3P 1 2 Actuator Open 3P 1 2 Actuator Close BV Control MBV Position Analog Out 1 Analog Out 2 Analog Out 3 Analog Out 4 4 for next previous unit gt to select parameter then gt to change parameter to confirm Alarm Relay Activates the Liebert iCOM s common alarm relay output K11 Relay Activates the Liebert iCOM s free cooling relay output 3P 1 2 Actuator Open Energizes the open circuit of the 3P type chilled or free cooling control valve 3P 1 2 Actuator Close Energizes the close circuit of the 3P type chilled or free cooling control valve BV Control Activates the following two items allowing the motorized ball valve to be manually opened or shut MBV1 Position Specifies the percentage valve 1 should be open Range is 0 to 100 MBV2 Position Specifies the percentage valve 2 should be open Range is 0 to 100 NOTE Q When BV control is set to Auto the MBV position will be adjusted to the set value but the pressure control algorithm will immediately begin adjusting the valve to control the condenser pressure When BV control is set to manu
65. difying and humidifying in 1 increments as the return air humidity moves through the proportional band halves The deadband range is used to widen the setpoint When the return air humidity falls within the deadband the control operates the same as if the humidity equaled the setpoint exactly This setting helps maximize component life by preventing excessive component cycling The Humidity Proportional Band and Humidity Deadband parameters are in the Service menu under the Setpoints submenu The Humidity Setpoint parameter is in both the User menu and Service menu under Setpoints Humidification Infrared Humidifier There are two types of infrared humidifiers small pan IFS and large pan IFL The operating mode of each is similar however some of the variables or timings differ The Liebert Challenger has different fill times because of the size of the pan Infrared humidifiers are started at 100 humidification request and stopped at 0 Infrared humidifiers cannot be driven in proportional mode Table 5 Parameters for infrared humidifier control Parameter Liebert IFS Default IFL Default Challenger Humidity in Last xx Hours 15 hours 15 hours 15 hours Fill Time 33 seconds 56 seconds 27 seconds Humidifier On Time 440 seconds 576 seconds 568 seconds Flush Rate 150 150 150 An autoflush system automatically controls a water makeup valve to maintain proper levels in the infrared h
66. e cooling unit to the cold aisle with a longer CAN Bus cable OR BY Obtaining a remote temperature sensor and addressing it to operate as the return temperature sensor An additional supply temperature sensor placed under the raised floor 33 Operation 3 8 2 Software Setup 3 9 To prepare the Liebert iCOM for Liebert Smart Aisle Control 1 Set Service Menu parameter 146 VSD fan speed to Auto This sets the cold aisle sensor to control the fan speed The cold aisle temperature setpoint can be set on parameter S102 Temperature Setpoint 2 Set Service Menu parameter 124 supply sensor to Cooling Only This sets the supply sensor to control the chilled water valve The discharge temperature setpoint can be set on parameter Service Menu 125 Supply Setpoint Event Types and Properties Liebert iCOM events are used to inform the user of cooling unit operational status All events are recorded in the Event Log which is in the User Menu The user can change the type alarm warn message and time delay of some events and can also enable or disable some events These event settings are in the Service Menu under Set Alarms pages 3 to 7 If an event has a safety function high pressure low pressure main fan overload etc the safety function will be executed in any case independent of the selected event type or if enabled or disabled The timing will function as set NOTE Not all critical event properties can be adjus
67. e isolated from other network traffic The network switch es that connect Liebert iCOMs need to be dedicated to supporting only Liebert iCOM communication The U2U network cannot be connected to the building or IT network If network communication is ever lost failed network switch etc all Liebert iCOM controlled cooling units will continue to operate as independent units The Liebert iCOM can support up to 64 nodes on one network An input output board large display and large wall mount display are each considered one node Of the 64 nodes that may be connected no more than 32 may be input output boards 32 cooling units A small display is not considered a node Small displays connect directly to input output boards that do not have large displays attached to them The following table illustrates how a network can be configured Table 13 Sample Liebert COM network configurations Wall Mount Private Sample Input Output Large Small Large Switch Configuration Boards Displays Displays Displays Required 1 2 0 2 0 No 2 2 0 2 1 Yes 3 3 0 3 0 Yes 4 2 1 1 0 Yes 5 8 4 4 1 Yes 6 32 32 0 0 Yes 7 32 27 5 5 Yes 8 32 0 32 32 Yes Network communication can be configured during system startup by a Liebert trained technician For technical issues contact Liebert Technical Service 1050 Dearborn Drive Columbus Ohio 43235 Telephone 1 800 LIEBSRV 1 800 543 2778 E Mail technicalservice emersonnetworkp
68. e position is tracked by an internal timer in the control to determine the position or opening of the valve If Feedback is selected then analog input 1 interprets the signal from the valve to determine its position Using the Feedback setting requires the setup procedure in 3 2 3 Chilled Water Control 3P Actuator Runtime Sets the travel time of the valve to determine the full open and closed position of the valve This is set at the factory based on the valve manufacturer s specifications 3P Actuator Direction Selects if the valve is a Direct or Reverse acting valve 95 Service Menu Parameters Figure 89 Options setup page 2 of 5 OPTIONS SETUP page 2 of 5 4 UNIT 01 gt PASSWORD Actual Level 3 Humidification Enabled Infrared Flush Rate Humidifier Steam Rate Humidifier Control Humidifier Bottle Flush Time Humidifier Bottle Manual Flush Dehum Enabled Dehum Fan Cntl Auto Restart Enabled Single Unit Auto Restart On Off Enabled 4 for next previous unit to select parameter then gt to change parameter to confirm Humidification Enabled Enables or disables humidification Infrared Flush Rate Shows the amount of makeup water supplied to an infrared humidifier as a percentage of the humidifier capacity This value can be set from 110 500 default is 150 Higher flush rates reduce mineral deposit buildup in the humidifier pan Humidifier Steam Rate Liebert HP
69. e s return air temperature and humidity readings temperature and humidity setpoints and any active alarm conditions If the cooling unit has a large display and is not on a network or if the unit has a small display whether it is networked or stand alone the Status menu will display only that cooling unit s information Any large display that is connected to a network can be used to view any cooling unit on the network or show an average view of the entire system of cooling units The Liebert iCOM has three main menus User Service and Advanced The User menu contains the most frequently used features settings and status information The Service menu contains settings and features used to set up unit communications and for unit maintenance The Advanced menu contains settings used to set up the unit at the factory NOTE Menu settings may be viewed without a password but changing settings requires a password The password for the User menu is 1490 The password for Service menu is 5010 For details on entering a password see Entering a Password on page 6 Accessing Submenus While the display is at unit status screen press either the Enter or down arrow key to display the User menu To access the Service menu press the right arrow key Pressing the right arrow key again will display the Advanced menu For navigating to the sub menus from each main menu press Enter key and then the appropriate arrow key Pressing the Enter key again t
70. e standard fan speed control will be overridden during a call for Dehumidification When there is a call for Dehumidification the fan speed will change to the VSD Setpoint Dehum parameter found in the Service Menu Setpoints The standard fan speed control will be overridden during a call for Humidification or Reheat During a call for Humidification or Reheat the fan speed will change to a higher speed which is set at the factory to eliminate the possibility of condensation or damage to the unit 14 Operation VSD Setpoint VSD Fan Speed Setting If the VSD Fan Speed Control Service Menu Setpoints is set for Manual the VSD Fan Speed Setpoint Service Menu Setpoints may be set for the desired speed of the variable speed motor Depending on the product control design there may be an internal minimum speed as defined by that specific product operation while the customer input may be set for 0 100 Fan speed may be set locally at the unit using the Liebert COM display Fan speed may be set remotely via a BMS signal sent via Modbus using an optional Liebert IntelliSlot 485 card which then transmits to the unit local control General Compressor Requirements Low Pressure Time Delay When the compressor starts the low pressure input is ignored for a selected period of time based on the setting of the Low Pressure Alarm Delay Service Menu Options Setup This time is usually set to 3 minutes on air cooled units an
71. eading is caused by overcooling the room This extends the dehumidification cycle Later when the dehumidification ends and the return air temperature rises to the setpoint the RH reading falls The final RH reading will then be lower than actually desired If significant overcooling occurred the RH could be low enough to activate the humidifier Compensated The actual return air humidity sensor reading is sent to the Temperature and Humidity Control where the Humidity Setpoint is adjusted based on how much the return room air temperature deviates from the desired temperature setpoint The adjusted humidity setpoint is used for humidification percent requirement determination For every 1 C deviation from the temperature setpoint the humidity setpoint is changed by 3 RH inversely proportional if the temperature increases the humidity setpoint is decreased and vice versa The recalculated humidity setpoint is shown as the Actual Humidity Setpoint User Menu Sensor Data As the humidity setpoint is automatically adjusted the high and low humidity setpoints User Menu Set Alarms are adjusted accordingly The unadjusted humidity sensor reading is displayed on the Status menu Predictive The actual return air humidity sensor reading is adjusted before it is sent to the Temperature and Humidity Control The humidity sensor reading is adjusted based on how much the return room air temperature deviates from the desired temperature setpoint For ev
72. ebert iCOM DO Currently only one Liebert iCOM DO card is supported Figure 80 iCOM DO events setup screen page 3 of 3 COM DO Events Setup pg 3 of 3 4 UNIT 01 gt SYC PASSWORD Actual Level 3 10 Joutout Statuo SEN High Head Pressure C 1 High Head Pressure C 2 ne a Loss of Airflow No 10 SJEYA Change Filters No 11 SES Water Alarm No 12 SER Condensing Pump Alarm No 13 SY Glycool Status No 14 SEE Unit On No 15 20000000 4 for next previous unit gt to select parameter then gt to change parameter to confirm 88 Service Menu Parameters Figure 81 Sensor calibration setup screen page 1 of 3 SENSOR CALIBRATIONSETUP page 1 of 3 4 UNIT 01 gt PASSWORD Actual Level 3 Return Temperature Calibrated Return Temperature Return Humidity Calibrated Return Humidity Digiscroll 1 NTC Calibrated Digiscroll 1 NTC Digiscroll 2 NTC Calibrated Digiscroll 2 NTC 4 for next previous unit to select parameter then to change parameter to confirm Return Temperature Adjusts the return temperature reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room Calibrated Return Temperature Shows the adjusted temperature value of the return sensor This value is the actual sensor reading or the offset Return Temperature Return Humidity Adjusts the return humidity reading from the actual sensor to compensate for a
73. ebert monitoring emerson com 800 222 5877 Outside North America 00800 1155 4499 Single Phase UPS amp Server Cabinets liebert upstech emerson com 800 222 5877 Outside North America 00800 1155 4499 Three Phase UPS amp Power Systems 800 543 2378 Outside North America 614 841 6598 Environmental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Box 29186 Columbus OH 43229 Europe Via Leonardo Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy 39 049 9719111 Fax 39 049 5841 257 Asia 29 F The Orient Square Building F Ortigas Jr Road Ortigas Center Pasig City 1605 Philippines 63 2 687 6615 Fax 63 2 7309572 EmersonNetworkPower com E Racks amp Integrated Cabinets Controls W Services EE Surge Protection
74. eep the cooling unit running at peak performance to ensure minimum component stress and maximum reliability The diagnostics will help the service engineer evaluate the unit s operation since the last maintenance Calculating Next Maintenance and Diagnostics If the unit includes any of the following components they are included in the calculation e Fan s Compressor 1 Compressor 2 e Electric Heaters e Humidifier For each component the next maintenance will be calculated from the following parameters Standard service interval 1 2 or 4 times a year to be set e Working hours counted Number of starts counted Average running time calculated Optimum number of starts per hour to be set e Maximum number of starts per hour to be set e Maximum bonus to enlarge time to next maintenance to be set e Maximum penalty to reduce time to next maintenance to be set Calculating Unit Wellness Liebert iCOM keeps tabs on the condition of a cooling unit determining its wellness and projecting when service will be needed for the entire unit as well as for individual components This assists in scheduling maintenance calls and helps pinpoint components likely to require service Liebert iCOM displays a graphic for needed maintenance It begins with the standard maintenance interval 12 months six months or three months and adjusts that based on its calculation of components wellness To calculate wellness Lieber
75. efault Setting On blank units without compressors All Chilled Water Units Low Limit 2 only 1 or 2 Compressor 1 and 2 alternate Liebert DS Low Limit 1 amp 2 Both both compressors dehumidify Low Limit 1 amp 2 will be available only on cooling units with two compressors when Dehumidification With Comp is set to BOTH see WARNING on page 30 29 Operation 3 6 3 6 1 Reheat During Dehumidification Hot gas reheat or hot water reheat will start as described in 3 4 Temperature Control Reheat when the temperature decreases during the dehumidification process The parameter Electric Reheat Operation defines how the heaters react in case the temperature decreases during the dehumidification process This parameter does not impact SCR reheat operation The Electric Reheat Operation parameter is in the Advanced menu under Factory Settings and should not be adjusted without factory approval No No electric reheat allowed during dehumidification process Delayed This setting applies only to two compressor units with BOTH compressors selected for dehumidification The electric reheats are prevented from turning on until Low Limit 1 is reached At this condition one stage of dehumidification is disabled and the reheats are activated At Low Limit 2 both stages of dehumidification are disabled When Delayed is selected on units with a single compressor selected for dehumidification Dehumidifi
76. elect parameter then gt to change parameter to confirm Compressor Sequence Changes the lead compressor when cooling is activated This parameter can also be set to AUTO mode which will activate the compressor with the lowest run hours first Low Pressure Alarm Delay Sets how long the unit will ignore a low pressure condition during compressor startup This parameter has previously been referred to as a Winter Start Time This parameter can be set between 0 to 5 minutes Electric Stages Shows the number of electric stages that can be activated during a call for reheat This parameter is set at the factory based on the unit s model number Electrical Heater Capacity Liebert HPM only Shows the electrical heater capacity for units with both electric and hot water or hot gas reheat Reduced capacity indicates HW HG Stage 1 electric Stage 2 full capacity indicates HW HG plus low capacity electric Stage 1 high capacity electric Stage 2 Hot Water Heat On Off This parameter is selectable between Yes and No If Yes is selected the unit is equipped with a hot water heater LWD Connected This parameter is set to Yes if a liquid detection device is connected to the Liebert iCOM Valve Control Selects between two different methods to keep track of valve position when a stem 3P valve is installed in the unit This setting does not affect motorized ball valves If Time is selected then the valv
77. elow Transition Change 4 for next previous unit gt to select parameter then gt to change parameter to confirm DT between Room Outdoor Type This feature is used only on Liebert HPM products DT between Room Air Outdoor This feature is used only on Liebert HPM products DT between Room FC Type Determines the method to activate the water circuit on Dual Cool and free cool units When this parameter is set to Contact a dry contact closure can be used to activate the free cooling circuit When this parameter is set to Value the delta between the water temperature of the free cool circuit and the actual room temperature are compared DT between Room Air FC Fluid Sets the delta between the actual room temperature and the free cooling fluid temperature to determine if cooling can be provided Minimum CW Temp FEnables the temperature at which free cooling can operate independently without assistance of the compressor circuit Minimum CW Temp Value Sets the water temperature at which 100 free cooling can be provided to handle the full room load When the fluid temperature is below this setting then the compressors will no longer turn on until the water temperature is above the minimum CW Temp Lockout FC at FC Fluid below The temperature that turns off the free cooling circuit when the water temperature is too low This setting prevents frost from building up on the free cooling pipes when the o
78. en generated by the unit When multiple units are networked you will see the event log of the whole system Each event shows the unit that generated the alarm time and date stamp a description and the event type View Network View Network The view network screen provides an overview of the Liebert COM network and a status of each unit This screen will provide the unique unit name given to the unit If no name is given then only the unit number will be displayed Figure 38 Set alarms screen page 1 SET ALARMS page 1 of 2 4 UNIT 01 PASSWORD Actual Level 0 222 Return Sensor Alarms Enabled High Return Temperature 80 F Low Return Temperature 65 F High Return Humidity 60 0 Low Return Humidity 40 0 Sensor A Alarms Disabled High Temperature Sensor A F Low Temperature Sensor A F High Humidity Sensor A Low Humidity Sensor A 4 for next previous unit to select parameter then gt to change parameter to confirm Return Sensor Alarms Enables or disables the return sensor alarms When enabled the return temperature and humidity values will be compared to a high and low setting High Return Temperature When the return sensor alarm is enabled the high temperature alarm allows a user to adjust the point at which the actual return temperature activates a High Temperature Alarm Low Return Temperature When the return sensor alarm is enabled the low temperature alarm allows a user to adjust the poi
79. ensor This value is the actual sensor reading or the offset Supply Sensor 90 Service Menu Parameters Figure 84 System network setup screen System page 1 of 2 large display only SYSTEM NETWORK SETUP pg 1 of 2 SYSTEM Sieh PASSWORD Actual Level 3 RIA Number of Connected Units 505 Teamwork Mode Ss Configuration Safe No Stoney Network Safe No SEN SW Version PAB 1 04 010 T14 4 for next previous unit gt to select parameter e then to change parameter to confirm Number of Connected Units Sets the number of units that will be viewable from the large display and will participate on the unit to unit network Teamwork Mode Selects which teamwork mode to use within a selected group Teamwork modes are described in section 4 0 of this manual Configuration Safe Saves or loads configuration settings for the display that have been modified from the factory defaults to an internal file that can be downloaded uploaded using the Liebert COM Service Tool Selecting Save will write the settings to the internal storage file and selecting Load will write the settings from the internal storage file to the application software The internal file is updated every 12 hours automatically Network Safe Saves or loads network settings for the display that have been modified from the factory defaults to an internal file that can be downloaded uploaded using the Liebert iCOM Service Tool Se
80. enter key to highlight the first icon Use the arrow keys to navigate through the icons With the desired icon highlighted press the enter key to enter that submenu Once in a Submenu a list of parameters will be displayed The up and down arrow keys may be used to scroll through the parameters page by page if the submenu has multiple pages To scroll item by item press the Enter key and then use the up and down arrow keys Using the right or left arrow keys on large displays attached to a network will change the unit being viewed Pressing the Esc key will go back a level Figures 7 and 8 show the Liebert iCOM menus for a stand alone large display and for a networked large display respectively NOTE Settings are readable without a password but changing settings requires a password Entering a Password The password must be entered before any value of the menu item parameter can be changed There are three levels of password for preventing unauthorized changes Entering the User menu password allows the operator the ability to change the parameters in the User menu The Service menu password enables the operator to changes parameters in both Service and User The Advanced menu password allows the changes to be made in all parameters The User menu password is 1490 the Service menu password is 5010 NOTE Entering the Service menu password permits access to both the User and Service menus To enter a password 1 Navigate to the menu
81. ents and Functions Table 3 Service menu icons continued Available On Icon Name Description Display Sensor Allows calibration of sensors Small amp large Calibration Setup oo Allows setup and U2U communication for multiple units Large Options Setup Allows setup of component operation Small amp large Service Contact Contains key contact information for local service a Small amp large Info including names and phone numbers COM DO Change settings for Liebert COM Discrete Output card Large 11 Operation 3 0 OPERATION 3 1 3 1 1 The Liebert iCOM display provides viewing trending and configuration capability for Liebert cooling units All unit settings and parameters can be viewed and adjusted through three menus User Service and Advanced All active alarms are displayed on the LCD and annunciated The control is shipped from the factory with default selections for all necessary settings Adjustments can be made if the defaults do not meet your requirements References to menu items in this manual are followed by the main menu and the submenu where they can be found For example Temperature Setpoint User Menu Setpoints The Temperature Setpoint parameter is located in the User menu under the Setpoints submenu High Return Humidity Service Menu Set Alarms The High Return Humidity alarm is located in the Service menu under the Set Alarms submenu
82. ernate or Cascade Valve Rotation Hour Determines the time between the valve rotations if Auto Valve Rotation is enabled Dehum Operation Selects the dehumidification operation of the valves for units equipped with dual motorized ball valves controlling flow to the chilled water coil 97 Service Menu Parameters Figure 91 Options setup page 4 of 5 OPTIONS SETUP page 4 of 5 4 UNIT 01 PASSWORD Actual Level 0 were Measure Type Precision Analog Input 1 Not Config Analog Input 2 Not Config Analog Input 3 Not Config Analog Input 4 Not Config Units System for Custom Inputs Metric 4 for next previous unit to select parameter then gt to change parameter to confirm Measure Type Determines the measurement units and allowable range for each analog input Factory Std measurement type means the input is being used by the PA program for unit control and cannot be set to any other measurement type Not Config measurement type means the input is available for custom sensor use but has not been configured After unit code execution all analog inputs that are available will be set to Not Config and can then be set to any of the following choices by the user Air Pres 1 2 3 or 4 Pressure 1 2 3 or 4 Temp 1 2 3 or 4 e Percent 1 2 3 or 4 It is not necessary to match a measurement type number to the analog input number e Air Pres 2 does not have to be connected to
83. ery 1 C deviation from the temperature setpoint the humidity sensor reading is changed by 3 RH directly proportional if the temperature increases the humidity reading is increased and vice versa The adjusted humidity sensor reading is displayed on the Status menu Units are shipped from the factory with Predictive humidity control set as default If Compensated or Predictive humidity sensor control is selected overdehumidification is avoided When overcooling occurs causing an increase in the relative humidity sensor reading the humidity control program predicts what the RH will be when the dehumidification cycle ends and return air temperature returns to the setpoint This allows the dehumidification cycle to end at the proper time The Compensated and Predictive humidity sensor control can reduce energy consumption by minimizing compressor and reheat operation and eliminating unnecessary humidifier operation NOTE The historical humidity sensor graphs will display the real unadjusted sensor readings no matter which Humidity Control Sensor Type is selected The graphical sensor data is in the User menu under Graphics 31 Operation Figure 25 Placing temperature and temperature humidity sensors Internal Temperature A ai and Humidity Sensor 5 to 15feet 1 5 to 4 5 m Temperature Sensor Supply Air Liebert Precision Cooling Unit 3 7 Supply Control 3 7 1 Supply Air The Supply Air sensor
84. ff it will not come back on until main power is reset or until the HP Alarm Counters Service Menu Diagnostics are reset to 0 Setting the counter to 0 will auto reset the alarm without the need of pressing the reset button on the display Even if the pressure in the system drops below the alarm point the compressor will remain off until the system is reset NOTE Q If the unit is equipped with manual reset high head pressure switches or if the auto reset high head pressure switches dont reset the compressor will not be turned back on but there will be a 30 second delay from when the high head pressure situation occurs and when the alarm is annunciated Digital Scroll High Temperature A protective maximum operating compressor temperature limit is imposed on units with digital scroll compressor s with thermistor If the digital scroll temperature reaches the maximum temperature threshold the compressor will be locked out for at least 30 minutes and an alarm will be annunciated If after 30 minutes the temperature has cooled to a safe operating temperature the compressor will resume operation Each time a high temperature alarm occurs HT 1 Alarm Counter Service Menu Diagnostics or HT 2 Alarm Counter Service Menu Diagnostics is increased by one Once these counters reach five occurrences in a rolling four hour period the compressor will be locked out The alarm can be reset once the temperature returns to a safe level by 1 Setti
85. fier Control Optional A factory supplied option may be provided to allow a start stop command to be sent to the control of a remote mounted humidifier Steam Generating Canister Humidifier The Steam Generating Humidifier has its own separate control board that manages the canister and steam rate Liebert iCOM sends an On Off command to relay a call for humidification 28 Operation 3 5 2 Dehumidification The Dehumidification Enable parameter Service Menu Options Setup allows for enabling disabling the dehumidification function A call for dehumidification is calculated in the same way as a cooling request The components valves compressors will follow this dehumidification request as soon as it is higher than the request for cooling Dehumidification Low Limit Low Limit 1 and Low Limit 2 are used to avoid overcooling a room during dehumidification When a low limit is reached a compressor or the liquid cooling source that is used for dehumidification is disabled It is re enabled when the return air temperature rises The Low Limit 1 and 2 settings are in the Service menu under Setpoints Low Limit 1 Low Limit 1 will disable one of two compressors for dehumidification If only one compressor is set for dehumidification or if the dehumidification source is chilled water this limit will not be visible and will be inactive Low Limit 2 Low Limit 2 will disable both compressors for dehumidification This limit will a
86. g increases from 0 to 100 the reheat capacity is slowly reduced by pulsing the reheat At 100 call for cooling the reheat is deactivated and the second single step compressor is started As the call for cooling is reduced the reheat capacity is slowly increased When the call for cooling returns to 0 the second single step compressor is deactivated If the Temperature Proportional Band calculates a call for heating from 0 to 200 the first single step compressor remains activated and full reheat capacity is provided Based on the factory default settings the first single step compressor is deactivated when the control reaches 200 call for heating The compressor remains deactivated until the control calls for 0 heating The compressor activation and deactivation points can be adjusted in the Service menu under Setpoints Figure 22 illustrates how a cooling unit with two single step compressors and SCR reheat operates when the SCR Control Type is set to Tight mode NOTE Some cooling units are not suited for a strict NO LOAD application These cooling units require a minimal load in the space Consult factory for verification Figure 22 Two single step compressors with SCR reheat set to Tight mode Temp Setpoint 70 F Proportional Band 8 F Cool 2 On Deadband 0 F i I 200 100 I 0 100 3 A Coolin Heatin Heatin g 9 coj j Copl 2 S R Off Off Y Proportional Band Y Proportional Band Y Proportion
87. ifier control 0 0 00 ccc eee eens 28 Dehumidification With Comp settings 29 Possible event settings some events not available in all units oooooooo o 35 Customer in PUES A A RAR a E A Pid Oar hoe ae 36 Number ot a alos inputs eri dr EA A it it Bley e 37 Analog connection control board switch position o ooo oooooooooor o 37 Alarm AP PLS A aa VaT aa la A AAA ar oesoe toad 38 Event notifications large or small display o o 39 Sample Liebert COM network configurations o ooooooooror eee eens 47 Ports available for connecting Liebert iCOMS o 53 Liebert IntelliSlot card compatibility o o oooooooooooo o 54 Unit diary Parameters nt A a A Ea 68 Service contact information parameters 0 0 0 0 ce cette eee eens 100 Introduction 1 0 INTRODUCTION 1 1 Figure 1 Liebert iCOM components The Liebert iCOM offers the highest capabilities in unit control communication and monitoring of Liebert mission critical cooling units Liebert iCOM may be used to combine multiple cooling units into a team that operates as a single entity enhancing the already high performance and efficiency of Liebert s units Liebert iCOM is available as a factory installed assembly or may be retrofitted on existing products with SM AM or AG controls Large graphic display wall mount versions of the control are available for remote operation and monitoring of cooling units
88. igh and Low Temperature and Humidity Events 000000 c eee eee 36 819 2 User inputs io ode a a led wo cxice a dete aye ones Whats Geet cele Oe 36 3 9 3 Analog Inputs Liebert CW and Liebert DS Air Cooled UnitS o ooooo 37 SA Tiebert iCOM DOS sje ws atte adore lia et ge ad 38 3 9 5 Possible Event Notifications 0 0 0 0 0 ccc eee eee e nena 39 3 10 Wellness Next Maintenance Calculation 0000s 40 3 10 1 Calculating Next Maintenance and Diagnostics 0 0 c cee eee eee 40 4 0 TEAMWORK rai ox ee Pert wae WS AAA 42 4 1 Teamwork Modes ein San ates E ie ead A Ws on oA ele 42 4 1 1 Application of Teamwork Modes 00 e tenes 42 ADS No Vain WORK oa idilio daas 42 41 3 Teamwork Mod D rinan a e beet E EE E EE a CER eee eRe 43 4 14 Teamwork Mode 2 ia e e PRG e a ae ae a See na 44 AES gt Standby Rotation E AE AE RA E A E EREA 44 5 0 INSTALLING A LIEBERT ICOM UNIT TO UNIT NETWORK 0 000 eee ee eee eees 45 5 1 Placement or Cooling Units naa di ed rea AAA AR RAE AAA AAA ame 45 5 1 1 Balancing Operating and Standby Units 0 0 ccc o 45 5 2 U2U Hardware Cables and Network Switch 0 0 0 0 cece eee ooo 46 5 3 Wiring for Unit to Unit Communications U2U 1 ens 47 5 3 1 Wiring a Liebert iCOM U2U Network 48 6 0 EXTERNAL COMMUNICATION BUILDING MANAGEMENT SYSTEMS LIEBERT SITESCANS uonteuccsiin aca us Stok see ea o alias 54 7 0 USER MENU P
89. in Teamwork Mode 1 only Standby units will start if an alarm occurs in one of the operational units If the standby units are cascaded they will also start and work with the regular operational units if the temperature or humidity cannot be controlled by the operational units before a high or low temperature humidity condition occurs Cascaded units are switched off again as soon as the temperature humidity returns back to normal The master unit defines its proportional band according to the number of available units see 4 1 3 Teamwork Mode 1 When a standby unit receives a request for full heating or cooling from the master unit see 3 2 1 Temperature Proportional Band it will respond to the request after its control delay NOTE Cascaded units are not included in the calculation of the average temperature humidity 44 Installing a Liebert iCOM Unit to Unit Network 5 0 INSTALLING A LIEBERT ICOM UNIT TO UNIT NETWORK 5 1 5 1 1 Connecting multiple Liebert iCOM controlled cooling units in an Ethernet Unit to Unit U2U network enables the units to work together to achieve efficient cooling and humidity control of the conditioned space Networking enables setting up the cooling units to exchange data for various modes of operation Teamwork Lead Lag Standby Rotation Cascade However the cooling units are set up a large display may be used to control and view the operational status of indi
90. ing the feedback signal will eliminate the need to drive the valve closed after a loss of power or Unit Off command decreasing the unit s restart time Authorized Emerson personnel should use the following steps to enable the feedback signal 1 The feedback on the control valve uses Analog Input 1 2 Nothing can be connected to Analog Input 1 P11 pins 1 through 4 3 Control board DIP switch SW2 Switch 1 must be ON Switch 2 must be OFF Figure 18 DIP switch locations on Liebert COM control board 4 P68 must have a jumper placed between the top and bottom two pins on the left side and one placed between the top and bottom pins on the right side the two middle pins should be left unconnected 5 Go to Service Diagnostics Service Menu and find 379 Set this option to Feedback and note that 880 will go to Yes and 381 will go to Ongoing If Feedback is already selected then go to line S380 and manually select Yes This means that the Liebert COM is doing auto calibration on the valve using the feedback now available through the potentiometer Wait for 381 to say Idle and then the process is complete 22 Operation Chilled water units that contain a motorized ball valve s are connected to the control by an analog output The analog output is driven proportionally to the call for cooling as shown in Figure 19 Larger chill water units may contain two motorized ball valves in which both valves are controlled in parallel for co
91. ion F Display Contrast 45 Buzzer Frequency Off 0 Backlite Off after 12h Screen Graphical Comma Display Shows ACT SET Display Colors Normal Date Format mm dd yyy 4 for next previous unit to select parameter then gt to change parameter to confirm Language Sets the language on the display Changing this parameter changes all menu parameters to the selected language Date Sets the internal date of the unit If this unit is connected to other units with the unit to unit network connection all units will reflect the last date set Time tThis parameter sets the internal time of the unit If this unit is connected to other units with the unit to unit network connection All units will reflect the last time set Temperature Indication Selects the actual and set point temperature indication Selecting C will set the unit to display in Celsius and F will set the unit to display in Fahrenheit Display Contrast Changes the contrast of the display to adjust for different viewing angles low light and bright light conditions As the display ages the contrast may need to be adjusted Buzzer Frequency Changes the audible noise frequency of the built in buzzer When adjusting the buzzer frequency the buzzer will sound allowing selection of a frequency that is easily detected when an alarm occurs Backlite Off After X Hours Controls the length of time that the back light remains active when the display is unused When
92. l operate at Fan speed is modulated between the VSD Setpoint MIN and VSD Setpoint STD based on either the call for cooling Auto Control or other fanspeed control settings determined by the VSD Fanspeed When VSD Fanspeed is set to Auto Economy or Delta control the STD setting on this parameter is the high limit for the fan speed output If VSD Fanspeed is set to Manual this parameter is the actual running speed of the fan The VSD Setpoint MIN and STD settings are expressed as a percentage of the Airflow Calibration setting VSD Setpoint Dehum No Power Sets the fixed fan speed the fan will operate at when there is a call for dehumidification The factory default setting for chilled water units is 60 which helps to keep the coil in a latent or dehumidification mode When set to No Power this parameter sets the fan speed applied when a Customer Input set to No Power is activated These settings are expressed as a percentage of the Airflow Calibration setting NOTE Fixed fan speeds are also set during Heating and Humidification modes These settings are determined by the manufacturer to prevent excessive heater temperatures and condensation and are typically set at 100 fanspeed Fanspeed Change at 0 100 Controls the rate of change during a fan speed adjustment to avoid overshoots The filter value depends on the current control deviation from the setpoint On the setpoint at 0 it s typically set lowe
93. l sensor to compensate for any error of the sensor or to match other sensors in the room Calibrated Optional Sensor A B and C Shows the adjusted value of the sensor This value is the actual sensor reading or the offset Optional Sensor B and C Type Currently supports only the TH Temperature Humidity sensor type Figure 83 Sensor calibration setup screen page 3 of 3 SENSOR CALIBRATIONSETUP page 3 of 3 4 UNIT 01 PASSWORD Actual Level 3 Freecool Sensor PTC or NTC Freecool Sensor Calibrated Freecool Sensor Supply Sensor PTC or NTC Supply Sensor Calibrated Supply Sensor Optional Sensor C 1 Calibrated Optional Sensor C 1 Optional Sensor C 2 Calibrated Optional Sensor C 2 4 for next previous unit to select parameter then gt to change parameter to confirm Freecool Sensor PTC or NTC Currently supports only the NTC selection Freecool Sensor Adjusts the free cooling temperature reading from the actual sensor to compensate for any sensor error or to match other sensors in the room Calibrated Freecool Sensor Shows the adjusted temperature value of the free cooling sensor This value is the actual sensor reading or the offset Freecool Sensor Supply Sensor Adjusts the supply temperature reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room Calibrated Supply Sensor Shows the adjusted temperature value of the supply s
94. lecting Save will write the settings to the internal storage file Selecting Load will write the settings from the internal storage file to the application software SW Version Contains the application software version loaded onto the Liebert iCOM display 91 Service Menu Parameters Figure 85 System network setup screen System page 2 of 2 large display only SYSTEM NETWORK SETUP page 2 of 2 SYSTEM BiA PASSWORD Actual Level 3 222 SJ P Address 192 168 254 003 SEN Netmask 255 255 255 000 SJ Gateway 0 000 000 000 00 00 68 1E 4A A5 SNA U 2U Protocol GBP Stt U2U Address 33 SJ U2U Group 1 5248 Bootloader Variables Changed No Attention any changes done on these parameters must be followed by a Save Reboot command IP Address Contains the network address of the display This address must be unique on the network Netmask Not currently used Gateway Not currently used MAC Unique hardware identifier of the Ethernet device U2U Protocol Always set to GBP U2U Address Unique identifier for each unit on the network Display addresses range from 33 to 64 Each display on the U2U network must have a different U2U address U2U Group Used to create zones or groups within a U2U network Once a group number is selected the display will see only devices with the same group number The group number can be changed to view other devices in different groups Bootloader Variables Indicate
95. lso stop dehumidification in single compressor units and in chilled water units The limits become active when the return air temperature drops below a temperature value equal to the sum of the temperature setpoint plus the value set on Low Limit 1 and 2 the Low Limit settings are negative values A dehumidification source is deactivated if the return air temperature drops below the Deactivation Temperature as in this example Temperature Setpoint 70 F 21 1 C Low Limit Value 7 F 3 8 C Deactivation Temperature 63 F 17 2 C NOTE If a cooling unit is equipped with SCR reheat and the SCR Control Type parameter is set to Tight mode then Low Limit 2 will be ignored see 3 4 Temperature Control Reheat Dehumidification Compressor Quantity Under Factory Settings in the Advanced menu there is an item called Dehumidification With Comp This will be set to either 1 2 1 or 2 or BOTH This setting determines which compressors are used for dehumidification It also determines if Low Limit 1 will be available and impacts how the reheats will operate during dehumidification The Dehumidification With Comp field is set when the cooling unit is built and should not be adjusted without first consulting the factory Table 6 outlines which Low Limit settings will be available based on the Dehumidification With Comp selection Table 6 Dehumidification With Comp settings Available to Set Value Dehumidification With Comp Setting D
96. mote large display attached to the front door utilize one of the available Ethernet ports in the Liebert vNSA Models with two switches utilize two ports to connect the switches Table 14 Ports available for connecting Liebert iCOMs Liebert vNSA With Number of Ports Number of Ports Number of Ports Remote Used to Connect Used to Available to Large Total Number Remote Large Interconnect Connect Liebert COM Model Display of Ports Display Switches Control Devices Liebert vNSA8 Liebert COM gt 8 1 7 es Liebert vNSA16 Liebert COM 16 1 2 13 Liebert vNSA8 8 8 _ eee O Liebert vNSA16 16 2 14 Figure 35 Liebert vNSA with optional remote large display 3 298 84mm E 12 305mm E 14 25 362mm DPN001136 Rev 0 53 External Communication Building Management Systems Liebert SiteScan 6 0 EXTERNAL COMMUNICATION BUILDING MANAGEMENT SYSTEMS LIEBERT SITESCAN Liebert iCOM is capable of communicating with external monitoring systems such as Building Management Systems BMS Network Monitoring Systems NMS Liebert s SiteScan Web system and others Each Liebert COM controlled cooling unit is equipped with Liebert IntelliSlot plug in slots for use with optional communication cards Ethernet Web SNMP Card RS 485 Modbus Card The hot swappable plug in cards provide interfaces supporting open protocols including Modbus
97. motorized ball valves Actual HP2 Pressure Current refrigerant high pressure side liquid reading in atmosphere for Compressor 2 This is available only on water cooled units equipped with motorized ball valves 74 Service Menu Parameters Figure 63 Diagnostics service mode screen page 2 of 8 DIAGNOSTICS SERVICE MODE page 2 of 8 4 UNIT 01 PASSWORD Actual Level 0 Manual Mode Motors Compressor 1 Compressor 1 Capacity Compressor 1 Cycle Ramp Compressor 1 LLSV Compressor 2 Compressor 2 Capacity Compressor 2 Cycle Ramp Compressor 2 LLSV 4 for next previous unit e to select parameter then gt to change parameter to confirm Manual Mode Places the Liebert COM in manual mode This is the initial setting necessary to activate any of the following items Motor s Starts the unit s main fan The main fan must be On before any of the following overrides can be activated Compressor 1 Turns on Compressor 1 and selects the mode of compressor operation The choices are RUN EVACUATE and CHARGE Compressor 1 Capacity Enable Compressor 1 Cycle Ramp Compressor 1 Cycle Ramp Select the capacity the compressor should run at The range is 0 to 100 Compressor 1 LLSV Control the liquid line solenoid valve for Compressor 1 Compressor 2 Turns on Compressor 2 and selects the mode of compressor operation The choices are RUN EVACUATE and CHARGE Compressor 2 Capacity Enables Compressor
98. mponents such as motor compressors heaters and humidifier at zero and starts a new maintenance calculation reset to be done after maintenance 40 Operation Fans Heaters Humidifier Settings and Diagnostics Number of starts and Working hours are counted separately since the last maintenance Total working hours can be read in the standard working hours window customer window Average Working Hours is the calculation resulting from starts and working hours Starts per Day Optimum is the number of starts considered as optimum Starts per Day Worst is the number of starts considered as hunting worst case Number of Alarms counts the alarms happened between two service intervals Actual Bonus is calculated from number of starts and average working time Can be positive bonus or negative penalty This value influences the time remaining to the next maintenance Compressor 1 2 Settings and Diagnostics Number of starts and Working hours are individually counted since the last maintenance Total working hours can be read in the standard working hours window customer window Average Working Hours is the calculation resulting from starts and working hours Starts per Day Optimum is the number of starts considered as optimum Starts per Day Worst is the number of starts considered as hunting worst case Number of HP Alarms counts the high pressure alarms happened between 2 service intervals Number of LP Alarms c
99. mwork Mode 2 all units must have the same setpoints The units proportional band deadband and related settings may differ Standby Rotation Typical Standby Lead Lag Function This function can be performed in any teamwork mode including NO Teamwork One or more units can be defined to be Standby the normal status of standby units is Standby Off fan off In case one regular unit has an alarm that is defined to be defined in the alarm configuration to switch on a standby unit the faulty unit will switch off and the standby unit will switch on If the 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 weekday of the month and time The rotation is performed with a selectable number of units if 1 is selected to standby rotates from 1 2 to 2 3 in a 4 units configuration with two standby units and rotates from 1 2 to 3 4 in the same configuration when the rotation parameter is set to 2 NOTE Before entering standby mode units will operate the fan only for 3 minutes to cool the electrical heaters remove steam from the unit etc Standby and Cascade Cascade is possible
100. n optional Humidity Deadband range can be defined which is equally divided on either side of the setpoint and separates the two halves of the proportional band Figure 24 illustrates how the humidity proportional band is evenly divided on either side of the humidity setpoint with and without a deadband Figure 24 Humidity proportional band Without Deadband Humidification Dehumidification Hum 100 Proportional Band 0 2 Proportional Band humidification Setpoint 100 Dehumidification With Deadband Humidification Hum 100 2Proportional Band 2 Proportional Band 100 Humidification Setpoint Dehumidification When the return air humidity deviates from the setpoint either dehumidification or humidification is activated If the return air humidity increases the control calls for 0 none to 100 full dehumidifying capacity based on how far the humidity penetrates the dehumidification portion of the proportional band If the return air humidity decreases the control calls for 0 none to 100 full humidifying capacity based on how far the humidity penetrates the humidification portion of the proportional band 27 Operation 3 5 1 When the return air humidity reaches the end of the proportional band either 100 or 100 full dehumidification or full humidification capacity is provided No operation is performed when a 0 call is calculated The control varies the call for dehumi
101. n series A cooling unit will start only if both switches are On if one of these switches is Off the unit will stop Safety devices within the unit are also in series and will shut the unit down if applicable Figure 11 Start stop priority switches Remote On Off Display On Off NOTE If Remote On Off is not used a jumper is inserted to bypass the switch 12 Operation Autorestart When input power returns after a power failure the unit will return to its previous operating status On if it was On before the power failure Off if it was Off When power returns the autorestart time time selectable Single Unit Auto Restart Service Menu Options Setup will determine how quickly the unit restarts If the units are on the same network the autorestart time runs in a loop starting each unit in sequence beginning with Unit 1 Loss of Power Alarm A Loss of Power Alarm is activated when power is restored after an interruption If acknowledged the alarm resets automatically after 30 minutes This alarm can be set to different event types Message Alarm or Warning and can be disabled under menu item Loss of Power Service Menu Set Alarms NOTE Loss of Power alarm will be activated only on units that had the fan switched On before power was lost Fan Alarm Fan Protection Settings The fan operation is protected by two digital devices motor protection optional and a differential pressure switch The mo
102. ng red bottom LED is green or amber Large Liebert iCOM Display shown Keypad and LEDs are identical on all displays Keypad Alarm Key Up Arrow Key On Off Key Help Key Left Arrow Key Enter Key Right Arrow Key Escape Key Down Arrow Key NOTE The Help key may be pressed at any time for a brief explanation of what is being viewed Liebert iCOM Display Components and Functions Table 1 Keyboard icons and functions Icon Key Name Function On Off Key Controls the operational state of the cooling unit Alarm Key Silences Resets an alarm Help Key Accesses integrated help menus ESCape Key Returns to the previous display view Enter Key Confirms all selections and selects icons or text Increase Key Up Arrow Moves upward in a menu or increases the value of a selected parameter Decrease Key Down Arrow Moves downward in a menu or reduces the value of a selected parameter 000000006 Left and Right Navigates through text and sections of the display Arrow Keys O g Blinking Red Active unacknowledged alarm exists AIN Upper LED Q Solid Red Active acknowledged alarm exists Q Amber Power is available to the unit unit is NOT operating Lower LED Green Power is available to the unit unit is operating Liebert iCOM Display Components and Functions Figure 3 Status menu large display graphical view
103. ng the counter back to 0 from the display and pressing the alarm reset button 2 Shutting off power to the control board by turning the cooling unit s main power disconnect switch Off and On Compressor Timing Short Cycle Protection To help maximize the life of your compressor s there is a start to next start delay for each single compressor NOTE This delay may cause a short cycle if there is a very light room load A short cycle means that the compressor has cycled On and Off 10 times in the past hour Should this occur contact your local Emerson representative to adjust the minimum compressor off delay 16 Operation 3 1 4 3 1 5 Compressor Sequencing on Two Compressor Units Compressor Sequencing parameter Service Menu Options Setup is intended to maintain equal run times between compressors This setting has three selection possibilities Always use Compressor 1 as lead compressor Always use Compressor 2 as lead compressor Auto First priority if the safety timings are acceptable for only one compressor then it is the next to be started stopped If both compressors are off the one with fewer working hours is the next to start If both compressors are in operation the one that has been operating longer since the last start is the next to be stopped NOTE The Auto setting attempts to maintain equal run times between compressors Motorized Ball Valve in Water Cooled Units On wate
104. nt at which the actual return temperature activates a Low Temperature Alarm High Return Humidity When the return sensor alarm is enabled the high humidity alarm allows a user to adjust the point at which the actual return humidity activates a High Humidity Alarm Low Return Humidity When the return sensor alarm is enabled the low humidity alarm allows a user to adjust the point at which the actual return humidity activates a Low Humidity Alarm Sensor A Alarms Enables or disables the alarms for reference Sensor A When enabled the Sensor A temperature and humidity values will be compared to a high and low settings High Temperature Sensor A When the Sensor A alarm is enabled the high temperature alarm allows a user to adjust the point at which the actual Sensor A temperature activates a High Temperature Alarm 56 User Menu Parameters Low Temperature Sensor A When the Sensor A alarm is enabled the low temperature alarm allows a user to adjust the point at which the actual sensor A temperature activates a Low Temperature Alarm High Humidity Sensor A When the Sensor A alarm is enabled the high humidity alarm allows a user to adjust the point at which the actual Sensor A humidity activates a High Humidity Alarm Low Humidity Sensor A When the Sensor A alarm is enabled the low humidity alarm allows a user to adjust the point at which the actual Sensor A humidity activates a Low Humidity Alarm Figure 39 Set alarms s
105. ntrol an environment more precisely Digital scroll capacity modulation is achieved by energizing and de energizing a solenoid valve on the compressor When the solenoid valve is de energized the compressor capacity is 100 When the solenoid valve is energized the compressor capacity is zero Therefore the capacity of the compressor depends on how long the solenoid is de energized for If the solenoid is de energized for 10 seconds then energized for 5 seconds during a 15 second cycle the resulting capacity will be 66 as shown in Figure 16 Figure 16 Digital scroll capacity modulation 10 100 variable Call for Cooling 66 100 Loaded Solenoid Solenoid Solenoid Solenoid De energized Energized De energized Energized 0 Loaded 0 5 10 15 20 25 30 15 Second Capacity 15 Second Capacity Modulation Cycle Modulation Cycle On single and dual digital scroll compressor systems the first compressor is started at 25 calculated output from the temperature proportional band and stopped at 10 On dual digital scroll compressor systems the second compressor is started at 35 and stopped at 20 see Figure 17 Whena compressor is started the solenoid is energized longer than it is de energized to match the call for cooling When the call for cooling increases to 100 the solenoid is de energized for the entire 15 second cycle Figure 17 Single and dual digital scroll compressor activation points Comp 1 amp 2 On Temp Setpoint
106. nu icons continued Available Icon Name Description On Display Total Run Hours Records the run time of all components and allows Small amp Large setting of limits on run time D a Sleep Mode Allows setback settings for non peak operation Small amp Large Service Contact Info Contains key contact information for local service Small amp Large including names and phone numbers rs e gt 2 Service Menu password 5010 SET WELLNESS SERVICE SET Edo Fal Table 3 Service menu icons Available On Icon Name Description Display C F RH Setpoints To view and change temperature and humidity setpoints Small amp large SET er Shows all entered program changes and maintenance E Unit Diary performed on the unit Large D gt a Standby Settings Allows lead lag setup when multiple units are connected Small amp large k Lead Lag _ Maintananes Allows setting maintenance interval reminder Wellness Settings maintenance message number of unit starts and stops Small amp large WELLNESS and time since last maintenance Diagnostics Allows troubleshooting manual mode read analog and Small amp large Service Mode digital inputs SERVICE SET ALARMS Set Alarms Allows enable disable and settings for alarms Small amp large 10 Liebert iCOM Display Compon
107. ny error of the sensor or to match other sensors in the room Calibrated Return Humidity Shows the adjusted humidity value of the return sensor This value is the actual sensor reading or the offset Return Humidity Digital Scroll 1 NTC Adjusts the digital scroll 1 NTC reading from the actual sensor to compensate for any error or drift of the sensor Calibrated Digital Scroll 1 NTC Shows the adjusted Digital Scroll 1 NTC sensor value This value is the actual sensor reading or the offset Digital Scroll 1 NTC Digital Scroll 2 NTC Adjusts the digital scroll 1 NTC reading from the actual sensor to compensate for any error or drift of the sensor Calibrated Digital Scroll 2 NTC Shows the adjusted Digital Scroll 1 NTC sensor value This value is the actual sensor reading or the offset Digital Scroll 1 NTC 89 Service Menu Parameters Figure 82 Sensor calibration setup screen page 2 of 3 SENSOR CALIBRATIONSETUP page 2 of 3 1 UNIT 01 PASSWORD Actual Level 3 Optional Sensor A 1 Calibrated Optional Sensor A 1 Optional Sensor A2 Calibrated Optional Sensor A 2 Optional Sensor B Type Optional Sensor B 1 Calibrated Optional Sensor B 1 Optional Sensor B 2 Calibrated Optional Sensor B 2 Optional Sensor C Type 4 for next previous unit gt to select parameter then gt to change parameter to confirm Optional Sensor A B and C Adjusts the reading from the actua
108. o access the menu items Figure 5 Menu tree Small display stand alone or networked Status Menu Unit 1 View User Menu Service Menu Password Password Password Setpoints Setpoints Factory Settings Event Log Standby Settings Lead Lag Access Passwords Graphics Maintenance Wellness Settings Set Alarms Diagnostics Service Mode Sensor Data Set Alarms Active Alarms Sensor Calibration Setup Display Setup Options Setup Total Run Hours Service Contact Info Sleep Mode Service Info Liebert iCOM Display Components and Functions Accessing Submenus on Small Displays For navigating to submenus while at the main menu User Service or Advanced use the up and down arrow keys to scroll through the icons page by page To scroll through the icons one by one press the enter key and then use the up and down arrow keys With the desired icon highlighted press the enter key to enter that submenu Once in a Submenu a list of menu items each with its associated parameter is displayed Press the enter key and use the up and down arrow keys to navigate through the parameters one by one Pressing the Esc key will go back a level Figure 5 shows the Liebert iCOM menus for a small display Accessing Submenus on Large Displays Press the enter key from the main iCOM display to access the User Service and Advanced menus Then use the left right arrows to move among the User Service and Advanced menus Press the
109. o the CANbus line The default alarm configuration matches the original Liebert ENV DO card alarm mapping Table 11 Alarm mapping Alarm Notes 01 Cooling Status The output is active when cooling is on 02 Heating Status The output is active when heating is on 03 Humidifying Status The output is active when humidification is on 04 Dehumidifying Status The output is active when dehumidification is on 05 High Temperature The output is active when high temperature alarm is active 06 High Humidity The output is active when the high humidity alarm is active 07 Low Temperature The output is active when the low temperature alarm is active 08 Low Humidity The output is active when the low humidity alarm is active 09a High Head Pressure C1 The output is active when the compressor 1 high head pressure alarm is active 09b High Head Pressure C2 The output is active when the compressor 2 high head pressure alarm is active 10 Loss of Airflow The output is active when a loss of air flow alarm is active 11 Change Filters The output is active when a change filter alarm is active 12 Water Alarm The output is active when a water alarm is active 13 Condensing Pump Alarm The output is active when the condensing pump alarm is active 14 Glycool Status The output is active when is free cooling active 15 Unit On The output is active the unit is turned on
110. oling The two valves may be set to Cascade mode for dehumidifying to minimize the overcooling effect during dehumidification NOTE Depending on the valve specifications the voltage output may be a 0 10VDC or a 2 10VDC that is scaled automatically within the control Figure 19 Chilled water valve control example cooling 3 3 3 3 1 100 Fully Open Requested Position 0 Closed Temp Y Proportional Band 0 100 Setpoint Cooling Temperature Control Second Cooling Source Certain cooling units are available with a second source of cooling within the unit These typically are compressorized models with an additional chilled water or free cooling coil Differential Temperatures Controls Comparator Circuit Delta T Temperature Difference Between Room and Glycol The comparator circuit determines if the glycol chilled water temperature of the second cooling source is low enough to provide at least partial cooling capacity The comparator circuit has three settings DT Between Room FC Type Service Menu Setpoints Disabled Contact Value The Disabled setting is for standard compressorized and chilled water units that do not have a second cooling source The Disabled setting can also be used to disable the second source of cooling The Contact setting is used when an external input is being used to determine when the second cooling source is to be activated The external control communicates
111. oling Only and Control on chilled water units The chilled water unit must have the valve feedback if the valve type is a 3P valve actuator Proportional control actuators used on motorized ball valves do not require the feedback feature Supply Setpoint Sets the temperature setpoint for the supply sensor when it is set to Cooling Only Control or Limit Supply Control Type Selects the type of control the system will use to activate cooling A detailed description of each control type can be found in 3 6 Control Types Supply Proportional Band Adjusts the valve s rate of change based on the actual sensor values deviation from setpoint when the supply sensor is set to Cooling Only or Control The smaller this number the faster the valve s will increase cooling capacity Too small of a number may cause the unit to excessively reposition the valve Supply Integration Adjusts the capacity of the unit based on time away from setpoint so that accurate temperature control can be maintained This parameter is active only when Control Type is set to PI Supply Deadband Prevents overshooting of the setpoint and cycling between the reheats and cooling The value entered into this field will be split in half by the temperature setpoint Example If the temperature setpoint is 60 F 15 5 C and a 4 F 2 2 C deadband is set then no cooling will be activated until 62 F 16 6 C and no heating will be activated until 58 F 14 4 C is
112. ontrol Type Selects the humidity control calculation Setting this parameter to Relative will control the humidity without considering any temperature deviations Predictive and Absolute control consider the temperature deviation from temperature setpoint so that a constant level of moisture is kept in the area based on the humidity sensor reading and the temperature deviation from setpoint The factory default setting is Predictive see 3 6 2 Humidity Sensor Reading Control Types Humidity Proportional Band Adjusts the activation points of the humidifier and compressors based on the actual sensor values deviation from setpoint The smaller this number the faster the compressors and humidifier will increase capacity too small of a number may cause the unit to short cycle or overshoot setpoint Humidity Integration Time Adjusts the capacity of the unit based on time away from setpoint so that accurate humidity control can be maintained If the integration time is set to 0 the humidity control operates as a proportional only control When an integration time is set the control mode changes to PI control Humidity Deadband Prevents overshooting of the setpoint and cycling between humidification and dehumidification The value entered in this field will be split in half by the temperature setpoint Example If the humidity setpoint is 50 and a 4 deadband is set then the dehumidification proportional range
113. oooooooooonooooo oo 21 Figure 18 DIP switch locations on Liebert iCOM control board 0 0 0 ccc nooo 22 Figure 19 Chilled water valve control example cooling 0 0 eee ene ees 23 Figure 20 Second cooling source and two step compressorized cooling ooooooooooooooooo 24 Figure 21 Three stage heating cusgi cick ob ice heed a Maw lad ete ed 25 Figure 22 Two single step compressors with SCR reheat set to Tight mode 0 000 eee eee eae 26 Figure 23 Two single step compressors with SCR reheat set to Standard mode o oooooo o 27 Figure 24 Humidity proportional band 0 0 ene eee eens 27 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Placing temperature and temperature humidity sensors 0 eee eens 32 Equipment layout for Liebert Smart Aisle Control 0 0 0 00 ccc cee eee 33 Analog connection control board switch 37 Teamwork Mode 1 with two cooling UNItS ee eens 43 Stand
114. ounts the low pressure alarms happened between 2 service intervals Number of TH Alarms counts the thermal protection alarms happened between 2 service intervals Actual Bonus is calculated from number of starts and average working time Can be positive bonus or negative penalty This value influences the time remaining to the next maintenance 41 Teamwork 4 0 TEAMWORK Unit 2 Unit U2U communications via a private network will allow the following functions to be placed into operation when the requirement exists The user must install the correct hardware see 5 0 Installing a Liebert iCOM Unit to Unit Network and properly program the units for the selected functionality The Liebert COM network can perform the following functions The Teamwork Mode functions allow for multiple stages of cooling heating and humidification dehumidification Teamwork Mode can be used to prevent environmental units from fighting where one environmental unit might be cooling while another unit is heating The Standby Lead Lag function allows one or more units to be set as Running and Standby for activation in case of an alarm This function also allows the units to be programmed in a rotation to help ensure Standby unit operation The Cascade Operation function allows additional units to be staged on based on the temperature or humidity requirement 4 1 Teamwork Modes Groups of cooling units connected to a network can be
115. ower com 47 Installing a Liebert iCOM Unit to Unit Network 5 3 1 Wiring a Liebert COM U2U Network Small Displays Two cooling units each with a small display To network two cooling units each with a small display connect a crossover CAT5 cable between the P64 connectors on each cooling unit s Liebert COM input output board A network switch is not needed see Figure 30 Figure 30 Connecting two cooling units each with a small display using a crossover Ethernet cable Three or more units with small displays To network three or more cooling units each equipped with a small display Figure 33 shows that one plug of the CAT5 cable is connected to P64A connector and the other to the network switch The P64A which is connected to port P64 on the control board is located near it on each cooling unit s Liebert iCOM input output board to a common network switch The P64A connector is a crossover coupler that on DS CW and Challenger units NOTE If P64A is not available on a unit connect directly to the Liebert COM board on P64 Large Displays A network switch is required to enable Ethernet communication on one or more cooling units with large displays Each cooling unit with a large display requires two straight through Ethernet cables from a network switch One cable connects to port P64 on the Liebert iCOM input output board and the other straight through cable connects to the female female coupler if the fem
116. perature that the cooling unit will maintain by applying cooling and or reheats Humidity Setpoint Selects a humidity that the cooling unit will maintain by removing or adding moisture to the air Humidity Control Type Selects the humidity control calculation Setting this parameter to Relative will control the humidity without considering any temperature deviations Predictive and Absolute control consider the temperature deviation from temperature setpoint so that a constant level of moisture is kept in the area based on the humidity sensor reading and the temperature deviation from setpoint Supply Sensor Enables or disables the supply air temperature sensor This sensor is an optional sensor that can be ordered from the factory see 3 7 Supply Control Supply Setpoint Temp Value Selects the discharge air setpoint see 3 7 Supply Control Backup Temperature Setpoint Selects a temperature setpoint that will be activated in the event of a BMS time out or a customer input signal The BMS timer and or the customer input must be configured for this parameter to activate 55 User Menu Parameters Spare Part List Spare Parts The spare parts lists contains a detailed description and part number that can be used to order parts for the unit These part numbers are specific to each model and option installed on the unit Event Log Event Log The event log displays all events and actions that have be
117. pressors are activated their normal activation settings within the 100 200 proportional band 150 and 200 respectively on two step systems 133 163 180 and 200 for a four step system If full GLYCOOL capacity is not available then the GLYCOOL valve will be opened proportionally over a cooling requirement band equal to the available GLYCOOL capacity The compressors would be activated when the GLYCOOL capacity is exceeded For example if the GLYCOOL capacity is 60 then the GLYCOOL valve would be fully open at 60 cooling requirement The compressors would continue to activate or deactivate based on shifting the activation points from 0 100 to 100 200 in relation to the cooling output band within the 100 200 proportional band To reduce compressor cycling and prevent hunting GLYCOOL capacity first becomes available when the entering glycol temperature is at least 8 F 4 4 C 22 capacity below the return air temperature or 3 F 1 7 C below the return air temperature for two hours GLYCOOL capacity is 100 when the glycol temperature is 25 F 13 9 C below the return air temperature The system will continue to operate in Econ O Cool mode as necessary as long as the entering glycol temperature remains at least 3 F 1 7 C 0 capacity below the return air temperature If GLYCOOL is not available the compressors activation and deactivation points are not shifted as explained above 24 Operation 3 4 3 4 1 D
118. quirement is determined by the difference between the air temperature sensor reading and the temperature setpoint As the air temperature rises above the temperature setpoint the percent cooling required increases proportionally from 0 to 100 over half the programmable temperature proportional band See 3 2 1 Temperature Proportional Band The percent heating requirement 0 to 100 is determined the same way when the air temperature falls below the setpoint The humidifying dehumidifying operations are controlled in the same manner as the cooling heating operations however the humidity sensors setpoints and proportional bands are utilized The Proportional control type is commonly selected on compressorized units PI If PI Control is selected the percent cooling heating requirement is calculated by adding together two individual terms proportional and integral The proportional term is calculated in a manner similar to the previously described Proportional control The integral term sometimes called reset action is calculated by measuring how much and for how long the air temperature humidity has been above or below the setpoint If the actual air temperature humidity is above the setpoint the percent requirement is slowly but continuously increased until the total is sufficient to bring the return room air back to the setpoint This control type is commonly selected on free cooling and dual cool units 30 Operation 3
119. r slow and at the end of the P band at 100 it s typically set higher faster The value is given in control output change per second Fanspeed Reposition Delay Sets the reposition delay that is applied only for changes to decrease fanspeed increases in fanspeed are controlled only by the fanspeed change speed filter After fanspeed is increased the timer will prevent the speed from being reduced for the delay duration Fanspeed Delta Sets the temperature delta between the two cold aisle containment sensors This delta is maintained to ensure that there is sufficient airflow inside the containment area Fanspeed P Band Sets the proportional band when fanspeed is in Delta control mode Fanspeed Integration Sets the integration time when fanspeed is in Delta control mode 67 Service Menu Parameters Figure 52 Setpoints screen page 6 of 6 S SETPOINTS pg 6 of 6 4 UNIT 01 gt SEE PASSWORD Actual Level 0 SAYA SCR Control Type S f Start Compressor 1 At Suess Stop Compressor 1 At SM Compressor 1 Stop Delay SILA Start Compressor 2 At SA1 4 Stop Compressor 2 At SM Compressor 2 Stop Delay S Cycle Time SM SCR Factor 51 5 Actual SCR Request 4 for next previous unit to select parameter then gt to change parameter to confirm SCR Control Type Sets the control type for the SCR reheats If set to Standard then the reheats will modulate when the temperature is below se
120. r decrease the operating compressor discharge pressure by changing the targeted range of control The discharge pressure is the peak pressure of the digital cycle Temperature Control Single Source Cooling No Extra Cooling Coil Temperature Proportional Band The control uses the temperature proportional band to determine which operation to perform cooling heating and how much capacity to provide The Temperature Proportional Band is a user defined range that is divided into two equal parts for cooling and heating The Temperature Setpoint 1s between these two equal parts An optional Temperature Deadband range can be defined which is equally divided on either side of the setpoint and separates the two halves of the proportional band Figure 12 illustrates how the temperature proportional band is evenly divided on either side of the temperature setpoint with and without a deadband Figure 12 Temperature proportional band O Without Deadband a 7 Proportional Band gt Proportional Band e Proportional Band gt Proportional Band 100 0 100 Heating Setpoint Cooling Temp Temp With Deadband Temp Y Proportional Band Temp Y Proportional Band 100 0 0 100 Heating Setpoint Cooling The control works the same for both supply or return air control When air temperature deviates from the setpoint the control will bring on cooling or heating If the actual air temperature inc
121. r glycol cooled units discharge pressure is controlled by a motorized ball valve MBV During unloaded operation pressure changes during each digital cycle could cause a pressure controlled water regulating valve to open and close an excessive number of times The motorized ball valve is designed to maintain a consistent peak discharge pressure The control algorithm for the motorized ball valve uses an intelligent sampling rate and adjustable pressure thresholds to reduce the number of times the valve opens and closes The valve assembly consists of the brass valve linkage and actuator Each compressor has one motorized ball valve that is driven by the analog output of the Liebert COM based on discharge pressure If there is a call for cooling the compressor start is delayed by a 30 second timer During this delay the motorized ball valve is set to 50 open to allow fluid flow through the unit condenser The compressor will start after the 30 second timer elapses Motorized Ball Valve Manual Mode Service Service Manual operation can be selected to allow service personnel to control the motorized ball valve from the Liebert iCOM When Auto BV Control is selected the motorized ball valve functions as it would be during normal system operation NOTE Compressor operation will be delayed 30 seconds to allow the motorized ball valve to position itself for initial startup When Manual BV Control is selected the user must be careful in se
122. re on units with digital scroll compressors Digital Scroll 2 Temperature Shows the actual digital scroll number 2 discharge temperature on units with digital scroll compressors 58 User Menu Parameters Figure 41 Sensor data screen page 2 return only SENSOR DATA page 2 of 3 WHR Daily High Temperature UKIE Daily Low Temperature SHE Daily High Humidity ULA Daily Low Humidity This window is READ ONLY 13 59 31 08 04 38 08 16 11 08 03 47 4 UNIT 01 gt Daily High Temperature The highest recorded temperature from 12 00 a m to 11 59 p m Daily Low Temperature The lowest recorded temperature from 12 00 a m to 11 59 p m Daily High Humidity The highest recorded humidity from 12 00 a m to 11 59 p m Daily Low Humidity The lowest recorded humidity in the last 24 hour period Active Alarms Active Alarms Permits viewing all current active alarms Figure 42 Sensor data screen page 3 SENSOR DATA page 3 of 3 Analog Input 1 Not Config Analog Input 2 Not Config Analog Input 3 Not Config Analog Input 4 Not Config This window is READ ONLY 4 UNIT 01 gt These parameters show the analog input configured device and the value from the device that is connected Refer to the Figures 88 through 92 for a list of analog input devices 59 User Menu Parameters Figure 43 Display setup screen DISPLAY SETUP SYSTEM Language ENGLISH Date 7 3 2010 Time 14 01 49 Temperature Indicat
123. reached Valve Pulse Defines the minimum change in the cooling requirement before the valve will reposition A greater number decreases the amount of repositions and a smaller number will increase the response of the valve Cooling Filter at 0 100 Controls the rate of change during a valve position adjustment to avoid overshoots The filter value depends on the current control deviation from the setpoint On the setpoint at 0 it s typically set lower slow and at the end of the P band at 100 it s typically set higher faster The value is given in control output change per second Return Compensation For supply control only Defines the maximum increase allowed to the supply temperature setting to maintain a minimum return temperature setpoint When the return air temperature is above its setpoint the supply air setpoint remains unchanged As the return air temperature drops below the setpoint the supply air setpoint will be proportionally increased to maintain the return temperature setpoint The maximum increase is defined with the return compensation parameter 65 Service Menu Parameters Figure 50 Setpoints screen page 4 of 6 SETPOINTS pg 4 of 6 4 UNIT 01 gt PASSWORD Actual Level 0 222 DT between Room Outdoor Type Disable DT between Room Air Outdoor F DT between Room FC Type Disable DT between Room Air FC Fluid F Minimum CW Temp Disable Minimum CW Temp Value Lockout FC at FC Fluid b
124. reases the control calls for 0 none to 100 full cooling capacity based on how much the temperature exceeds the setpoint If the return air temperature decreases the control calls for 0 to 100 none to full heating capacity based on how far the temperature is below the setpoint When the return air temperature reaches the end of the proportional band either 100 or 100 full cooling or full heating capacity is provided No operation is performed when a 0 call is calculated or the temperature is within the deadband The control varies the call for cooling and heating in 1 increments as the air temperature moves through the proportional band halves The deadband range is used to widen the setpoint When the air temperature falls within the deadband the control operates the same as if the temperature equaled the setpoint exactly This setting helps maximize component life by preventing excessive component cycling NOTE The temperature deadband prevents small temperature changes from activating compressors and valves 18 Operation The Temperature Proportional Band and Temperature Deadband parameters are in the Service menu under the Setpoints submenu The Temperature Setpoint parameter is in both the User Menu and Service Menu under Setpoints There is a parameter AutoSet Enable Service Menu Setpoints which automatically sets the proportional bands for temperature and humidity and both the integration time factors
125. red for interconnecting the units Maximum distance must not exceed 328 feet 100m A device to boost the Ethernet signal may be used to exceed the 328 feet 100m length limitation Ethernet network should be private set up only for management and control of the cooling units Keep control and communication cables away from power cables to prevent electromagnetic interference Do not bend cables to less than four times the diameter of the cable Do not deform cables when securing in bundles or when hanging them Keep cables away from devices that can introduce noise into them such as machines fluorescent lights and electronics Avoid stretching Ethernet cables tension when pulling cables should not exceed 25 pounds 11kg Do not secure Ethernet cables with any method that might damage them use approved hangers such as telephone wire RG 6 coaxial wire hangers available at most hardware stores Minimum Network Switch Requirements IEEE 802 3 IEEE 802 3u 10 100 Mbps speed Multiple 10 100 RJ 45 ports one shared RJ 45 Uplink port The Liebert vNSA is an approved powered network switch designed to support Liebert iCOM U2U networks See Liebert vNSA on page 53 for details 46 Installing a Liebert iCOM Unit to Unit Network 5 3 Wiring for Unit to Unit Communications U2U Cooling units come from the factory wired for stand alone operation Liebert iCOM U2U Ethernet Network The Liebert iCOM U2U network must b
126. rm condition occurs Type Sets the type of action for each event listed There are three different types of events Alarm Warning and Message When an event is triggered and the type is set to Alarm then the light and buzzer on the display will activate an event will be written to the event log and the K3 alarm relay will close If the type is set to Warning then the light and buzzer on the display will activate an event will be written to the event log and the K3 alarm relay can be configured to close or provide no reaction If the type is set to Message then the event is only written to the event log 84 Service Menu Parameters Figure 73 Set alarms screen page 4 of 8 SET ALARMS page 4 of 8 UNIT 01 gt SY PASSWORD Actual Level 0 DELAY EN DIS MAIN FAN OVERLOAD 5 ENABLE LOSS OF AIRFLOW 30 ENABLE CLOGGED FILTERS 2 ENABLE HIGH ROOM TEMP 30 ENABLE LOW ROOM TEMP 30 ENABLE HIGH ROOM HUM 30 ENABLE LOW ROOM HUM 30 ENABLE HIGH TEMP SENSOR A 30 DISAB LOW TEMP SENSOR A 30 DISAB HIGH HUM SENSOR A 30 DISAB LOW HUM SENSOR A 30 DISAB Figure 74 Set alarms screen page 5 of 8 SET ALARMS page 5 of 8 UNIT 01 PASSWORD Actual Level 0 DELAY EN DIS SZI COMP 1 OVERLOAD ENABLE 5290 COMP 2 OVERLOAD ENABLE SZ COMP 1 HIGH PRESSURE ENABLE 54 COMP 2 HIGH PRESSURE ENABLE SY COMP 1 LOW PRESSURE ENABLE ezed COMP 2 LOW PRESSURE ENABLE SY COMP 1 PUMPDOWN FAIL ENABLE SY COMP 2 PUMPDOWN FAIL ENABLE S
127. rovide communication to the Liebert IntelliSlot housing IGMNet will activate the 77 78 terminals for communication to the Liebert SiteLink E Liebert Hironet is only used on Liebert HPM units IP Address Contains the network address of the display This address must be unique on the network Netmask Not currently used Gateway Not currently used MAC Unique hardware identifier of the Ethernet device U2U Protocol This parameter is always set to GBP U2U Address Unique identifier for each unit on the network Display addresses range from 33 to 64 Each display on the U2U network must have a different U2U address U2U Group Creates zones or groups within a U2U network Once a group number is selected the display will see only devices with the same group number The group number can be changed to view other devices in different groups Bootloader Variables Indicates if there has been a change to the boot loader since it was last loaded This parameter should only be activated by an authorized service person 94 Service Menu Parameters Figure 88 Options setup page 1 of 5 OPTIONS SETUP page 1 of 5 4 UNIT 01 PASSWORD Actual Level 3 Compressor Sequence Low Pressure Alarm Delay Electric Stages 3 Electrical Heaters Capacity Hot Water Heat On Off No Total Heat Stages 3 LWD Connected No Valve Control Feedback 2P Actuator Runtime 165sec 3P Actuator Direction Direct 4 for next previous unit to s
128. s if there has been a change to the bootloader since it was last loaded This parameter should only be activated by an authorized service person 92 Service Menu Parameters Figure 86 System network setup screen Unit page 1 of 2 SYSTEM NETWORK SETUP pg 1 of 2 UNIT 01 SJL PASSWORD Actual Level 3 528 Monitoring Address Monitoring Timeout Handshake Unit Name SE Configuration Safe Changed No 524 Network Safe OK No SEE SW Version PAL 1 04 010 T 14 4 for next previous unit gt to select parameter then gt to change parameter to confirm Monitoring Address Sets the address used by the Liebert Intellislot cards This is set to 3 at the factory and should not be changed Monitoring Timeout Handshake Used with a building management system to verify communication between the Liebert COM and the BMS has not been lost If the amount of time specified in this parameter elapses before the BMS writes a new value then an alarm will occur BMS TIMEOUT and the temperature setpoint will revert to the backup setpoint and the fan speed if equipped will change to 100 To disable this feature write a zero to this parameter when it is active Unit Name A label to identify the unit from the local or remote display This label will show at the top right of every screen that has monitoring or configuration of that unit Configuration Safe Saves or loads configuration settings for the control board th
129. t iCOM keeps a running total of component working hours and the number of times it has been started Liebert iCOM relates that data to the optimum maximum starts per hour Accordingly Liebert iCOM will increase or decrease the time before the next service call The more frequently a component starts the sooner it is likely to need maintenance If for example a unit s fan runs continuously but it s compressor starts and stops often Liebert iCOM records that and calls for maintenance based on the compressor s wellness factor Alarms and warnings such as clogged filters or high or low pressure reduce the time till the next maintenance to zero If the alarm is cleared and reset Liebert iCOM recalculates wellness It begins with the pre alarm maintenance time and factors in the alarm Parameters for Next Maintenance Calculation General Maintenance Settings e Maintenance Frequency can be set as one to 12 months or to zero which disables maintenance calculation Max Bonus increases the time to next maintenance with the set value if all components run optimally number of starts average running time Max Penalty value decreases the time to next maintenance with the set value if some components run in non optimum way number of starts average running time Last Maintenance date can be set from service engineer informational Service Engineer name of the service engineer editable e Reset puts all counters of all co
130. t previous unit to select parameter then gt to change parameter to confirm CW Flush Selects the number of hours between each chill water coil flush cycle The default is every 24 hours Reducing this number will increase the number of coil flushes Freecooling Flush Selects how many hours between each free cooling coil flush cycle The default is every 24 hours Reducing this number will increase the number of coil flushes Hot Water Flush Selects how many hours between each hot water coil flush cycle The default is every 24 hours Reducing this number will increase the number of coil flushes Ball Valve Setpoint Offset Adjusts the operating compressor discharge pressure by changing the targeted range of control for units with motorized ball valves Heaters Outputs as Liebert HPM only Activates the heater digital output based on the selected event on units with no heaters CW Valve Control For units equipped with dual motorized ball valves controlling flow to the chilled water coil this parameter allows the valves to be set to operate in parallel alternate or cascade Parallel is the default selection and operates the valves at the same opening based on the call for cooling Main Valve Selects which valve is the lead valve if CW Valve Control is set for Alternate or Cascade Auto Valve Rotation Allows the valves to be rotated based on the Valve Rotation Hour if CW Valve Control is set for Alt
131. ted Event Types Message If this event occurs it will only be entered into the event log Warning If this event occurs a warning will be generated and entered into the event log The general alarm relay will be activated only if parameter Warning Activates Alarm Relay located in the Service menu under Alarm Setup is set to Yes Yes is the default setting from the factory Alarm If this event occurs an alarm will be generated and entered into the event log An alarm does not necessarily switch off the whole cooling unit it depends on which alarm occurs If a standby unit is set any alarm will stop the faulty unit and ask the standby unit to start Standby activation is achieved on alarms ONLY messages or warnings will not start the standby unit For more on standby units see 4 0 Teamwork Time Delay Delays the event reaction once it is triggered The time delay applies to safety functions and is entered in seconds Enable or Disable Disabled events do not show up in the event log on the display or on monitoring devices Also the common alarm relay will not be activated if a disabled alarm occurs Safety functions such as lockout compressor in case of high pressure are still performed NOTE Once an event either Warn or Alarm type has been set to Disable the associated alarm condition will not be annunciated Disabled events may be reset only through the menu item Reset Disabled Alarms NOTE The value of the ex
132. ternal delay includes the internal delay if it is greater than the internal delay The minimum setting of the external delay is the value of the internal delay This is valid only for values marked with 34 Operation Table 7 Possible event settings some events not available in all units Internal Delay Default Delay Selectable Type Event Before Action Occurs Before Action Occurs default MAIN FAN OVERLOAD 2 seconds 5 seconds 0 9999 ALM LOSS OF AIRFLOW 3 seconds 3 seconds 0 9999 ALM CLOGGED FILTERS 2 seconds 2 seconds 0 9999 WRN HIGH ROOM TEMP 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN LOW ROOM TEMP 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN HIGH ROOM HUM 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN LOW ROOM HUM 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN HIGH TEMP SENSOR A 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN LOW TEMP SENSOR A 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN HIGH HUM SENSOR A 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN LOW HUM SENSORA 1 Min After Fan On 30 seconds 0 9999 Fixed to WRN COMP 1 OVERLOAD Internal Calc no ALM COMP 2 OVERLOAD Internal Calc no ALM COMP 1 HIGH PRESSURE Internal Calc no ALM COMP 2 HIGH PRESSURE Internal Calc no ALM COMP 1 LOW PRESSURE Internal C
133. tion enhances air flow control when a containment solution is being utilized This is accomplished by maintaining the correct airflow based on the inner and outer containment temperatures Additional fan speed configuration parameters include a fan speed filter and fan speed reposition delay timer These parameters allow fine tuning of the fan speed control and except for setting to Manual are applicable to any other operation mode set in the VSD fan speed setting The fan speed filter allows the fan to respond at a different rate depending on the location of the control point within the proportional band Example When the controlled temperature is near the setpoint or at conditions where the pro portional band output is decreasing and approaching 0 the fan speed change rates are pro portionally decreased to avoid overshooting the controlled temperature However when the temperature rises above the setpoint or at conditions where the proportional band output is increasing the fan speed change rates are proportionally increased The fan speed reposition delay timer setting in the Liebert COM menu can be changed to improve the fan operation stability if it is oscillating The delay timer holds back the fan output change until each delay period is reached if fan speed is decreasing If fan speed is increasing then the delay timer has no effect NOTE Q The fan speed lower and upper limit settings are normally set at the factory Th
134. tor protection monitors for main fan overload Main Fan Overload alarm or EC fan fault and the differential pressure switch detects a loss of airflow If either protection device is activated after an adjustable time delay an audible alarm occurs an alarm relay activates and an event is recorded in the event log Main Fan Overload and Loss of Airflow in Service Menu Set Alarms The fan delay at the unit start is always five seconds shorter than the control delay to avoid short cycling components when the fan is not working There are two selection possibilities for both Loss of Airflow and Main Fan Overload Shutdown stops the unit intended for DX models Disable disables humidifying heating and dehumidifying outputs allows cooling and free cooling only intended for chilled water models external cooling NOTE When the Main Fan Overload alarm is active the Loss of Airflow alarm is masked out 13 Operation Chilled Water Units with Variable Fan Speed EC or Variable Frequency Drives Parameters related to VSD fan speed setting can be found in the Service Menu Setpoints submenu on page 5 of 6 This menu allows the cooling unit s fan motor speed to be configured and adjusted for a variety of applications Auto Operation When set to Auto the speed of the fan motor follows the position of the chilled water valve based on predetermined logic for cooling and dehumidification operation Auto operation can be
135. tpoint based on the control settings If this parameter is set to Tight control then one compressor will be locked on and the reheats will modulate to offset the cooling capacity Start Compressor 1 2 at Sets the activation point of the compressor This parameter can be used when set to Tight control Stop Compressor 1 2 at Sets the deactivation point of the compressor This parameter can be used when set to Tight control Compressor 1 2 stop delay Sets the delay when the stop compressor setpoint is met Cycle time Set at the factory and should be changed only by an authorized Liebert representative SCR Factor Set at the factory and should be changed only by an authorized Liebert representative Unit Diary Large Display Only Shows all entered program changes and maintenance performed on the unit Table 16 Unit diary parameters Function Range Large Display Small Display Imperial metric Page 1 of 1 Text entered with ST Liebert COM Service Tool N A 68 Service Menu Parameters Figure 53 Standby settings lead lag screen STANDBY SETTINGS LEAD LAG SYSTEM PASSWORD Actual Level 0 Number of Standby Units Rotation Frequency Rotate at hour Rotate at minute Rotate by Perform one Rotation Cascade Units Start all Standby Units by HT 4 for next previous unit to select parameter then gt to change parameter to confirm
136. trols the 3P valve s Control can be by either of two methods A time driven signal that uses a 3P valve s travel time and the time that an open or closed output is provided to a 3P valve to estimate its current position A feedback signal from the valve that is required for Supply Air Control The feedback signal constantly provides the Liebert COM with the valve s position eliminating the need to reset the valve s on a loss of power and provides a valve failure detection Start Valve Calibration Changing this value to Yes starts the valve calibration procedure During this procedure the valve is positioned to a fully closed and fully opened state while the feedback signal is monitored The control then automatically saves the feedback signal voltage at the two end points as its calibration reference during normal operation Calibration Status Shows whether the calibration has been started idle indicates calibration has not begun ongoing indicates calibration has begun When calibration has been completed the status will return to idle V1 0 open Feedback voltage recorded when the valve is positioned at 0 during the calibration V1 100 open Feedback voltage recorded when the valve is positioned at 100 during the calibration Current V1 Feedback The valve s current feedback voltage This value changes as the valve strokes to different open positions V2 0 open For an optional secondary valve oper
137. tting the MBV position because the ball valves will remain in the position set in the Service menu until the control is switched back to Auto or until a technician changes the valves to another manual position the motorized ball valve in manual mode can be set in 1 increments from fully closed to fully open Low or high discharge pressure may occur during this mode depending on environmental conditions and the position of the motorized ball valve The motorized ball valve is driven by a 2 10VDC proportional control signal the valve is closed at 2VDC 50 open at 6VDC and fully open at 10 VDC MBV Operation After Compressor is Turned Off Once a compressor has stopped the MBV control will continue to change the MBV position to maintain system pressures for a maximum time of 10 minutes by following the Auto BV control algorithm When the 10 minute delay has expired or the discharge pressure is below its minimum threshold the motorized ball valve will close until the next compressor activation 17 Operation 3 1 7 Service Offset Changing System Pressure Settings 3 2 3 2 1 The MBV control is set to maintain a system pressure specific to the particular type of cooling unit A properly trained and qualified technician can increase or decrease the pressure through the Ball Valve Setpoint Offset found in the Service Options Setup menu The range is 0 to 50 PSI the default is 30 PSI NOTE Adjusting this parameter will increase o
138. ture management and connectivity All solutions are supported globally by local Emerson Network Power service technicians Liebert AC power precision cooling and monitoring products and services from Emerson Network Power deliver Efficiency Without Compromise by helping customers optimize their data center infrastructure to reduce costs and deliver high availability While every precaution has been taken to ensure the accuracy and completeness of this literature Liebert Corporation assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions 2006 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice Liebert is a registered trademark of Liebert Corporation All names referred to are trademarks or registered trademarks of their respective owners SL 18835_REV6_11 10 Emerson Network Power The global leader in enabling Business Critical Continuity E AC Power E Embedded Computing E Outside Plant E connectivity Mi Embedded Power H Power Switching amp MDcPower Hi Infrastructure Management amp Monitoring M Precision Cooling Emerson Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co or one of its affiliated companies 2006 Emerson Electric Co Technical Support Service Web Site www liebert com Monitoring li
139. ty The remaining 10 system call for cooling 60 50 10 is handled by Unit 2 Unit 2 responds by operating at 20 cooling capacity 50 10 20 Figure 28 Teamwork Mode 1 with two cooling units temp 100 1 2 Proportional Band Setpoint Unit 1 Deviation 100 Unit 2 Deviation 20 cooling temp 0 1 2 Proportional Band 100 0 1 2 Proportional Band 100 Setpoint Setpoint 43 Teamwork 4 1 4 4 1 5 Teamwork Mode 2 Teamwork Mode 2 is designed to prevent units within a group from working against each other or fighting It is best applied in large rooms with unbalanced heat loads In Teamwork Mode 2 all parameters are shared equal to Mode 1 and Unit 1 averages all of the available unit sensor readings on the network to define whether there is a cooling heating dehumidification or humidification request If there is a cooling request all units are released to start cooling resources according to their own temperature readings heating is disabled for all units and vice versa Same for humidity control If the network average would ask for 0 proportional band the most demanding request highest or lowest temperature of all units highest or lowest humidity of all units would be used to define the operation to be performed Teamwork Mode 2 does not rotate unevenly distributed working hours to be expected Autoset will not adjust the proportional band in this mode NOTE In Tea
140. ual Cooling Source If dual cooling is available the system operates in the same manner as a GLYCOOL system except that it is assumed that 100 chilled water capacity is available any time the chilled water temperature is 3 F 1 7 C below the return air temperature Temperature Control Reheat If the room air temperature becomes too cold the control will call for heating Heating mode is controlled by the Temperature Proportional Band explained in 3 2 1 Temperature Proportional Band Electric Hot Gas and Hot Water Reheat Different types of cooling units feature different types of standard electrical heating Not all types offer hot gas or hot water reheat The number of electrical heating stages also varies some types of cooling units have single stage electrical heating as standard and offer two stage electrical heating as an option Other types feature three stage heating as standard The Reheat Proportional Band is divided into three equal parts each representing one reheat stage As the Temperature Proportional Band increases the call for heating from 0 to 100 stages 1 through 3 are switched On as shown in Figure 21 Your unit will have one of the nine reheat configuration types shown in Table 4 Table 4 Reheat configuration types Type A B Cc D E F G H l Stage 2 Electric 2 Electric 2 Electric 1 Electric 1 Electric 1 Electric 1 Stage 3 Electric 3 Electric 2 Electric 2
141. umidifier water pan during humidifier operation If humidification is needed and 15 hours have elapsed since the last time the humidifier was on then the humidifier is not turned on until the valve completes an initial fill of the humidifier pan This pre fill is about 30 seconds for a small pan and 60 seconds for a large pan The valve continues to fill and flush the pan for about 4 1 2 minutes for a small pan or 7 1 2 minutes for a large pan Pan size is selected based on unit specifications and is preset at the factory During humidifier operation with the flush rate set at the default of 150 the valve is opened periodically to add water to the pan about 45 seconds every 7 minutes of humidifier operation for a small pan or 80 seconds every 10 minutes of operation for a large pan This adds enough water to the pan to cause about a third of the total water used to be flushed out of the overflow standpipe located in the humidifier pan This action helps to remove solids from the pan The flush rate is adjustable from 110 to 500 in 10 intervals Default is 150 If the water quality is poor it may be desirable to increase the water flushing action above the normal 150 rate Also if the supply water pressure is low the flush rate adjustment can be increased so that sufficient water level is maintained during humidification The flush rate parameter Infrared Flush Rate Service Menu Options Setup is adjustable from 110 500 External Humidi
142. utdoor ambient is extremely low Transition Change Applied over the Cooling Filter at 0 100 when the cooling signal makes the transition between cooling and dehumidification This will smooth the cooling capacity changes between dehumidification and cooling 66 Service Menu Parameters Figure 51 Setpoints screen page 5 of 6 SETPOINTS pg 5 of 6 4 UNIT 01 gt SEP PASSWORD Actual Level 0 2779 SEI VSD Fanspeed Auto SMEYI Airflow Calibration 10 0V SEP VSD Setpoint MIN STD 85 100 Syke VSD Setpoint Dehum No Power 100 100 SA Fanspeed Change 0 20 1 00 s 51 Fanspeed Reposition Delay Osec SAR Fanspeed Delta 2 F SARA Fanspeed P Band 11 F S Fanspeed Integration 5min 4 for next previous unit to select parameter then gt to change parameter to confirm VSD Fanspeed Sets the control type for a Variable Fanspeed device which includes Variable Frequency Drives and EC fans Selection options are Auto Manual Economy Delta Return and Supply control See 3 1 1 Unit Fan Control for details of each control Airflow Calibration Allows the front display to be scaled to show the actual percentage of airflow independent of the voltage operating the fan speed This value cannot be set above the Analog Output High Limit or below the Analog Low Limit for the fan set in the Advanced Menu VSD Setpoint MIN STD Sets the fanspeed for the VSD MIN sets the minimum speed that the fan wil
143. vidual units or of the entire system NOTE The maximum number of cooling units that may be interconnected is 82 Placement of Cooling Units Refer to the cooling unit product manuals for details on installation Also consider these factors when planning for installation of cooling units with Liebert iCOM controls heat load in the conditioned space cooling air distribution number of operating units versus number of standby cooling units location of the network switch An Ethernet cable cannot exceed 328 feet 100m Balancing Operating and Standby Units Assign identification to the units in a manner that balances the operating units and standby units according to room layout and heat load requirements For example identify the operating units with numbers 1 through 5 and the standby units 6 through 10 Refer to Figure 29 Figure 29 Standby unit layout example 10 Precision Cooling units in room Precision Cooling units 1 through 5 are on Teamwork Rotation 1 Precision Cooling units 6 through 10 are on Teamwork Rotation 2 Communication Cables Teamwork Rotation 1 Communication Cables Teamwork Rotation 2 45 Installing a Liebert iCOM Unit to Unit Network 5 2 U2U Hardware Cables and Network Switch Plan wiring runs for U2U communication when designing the layout of your conditioned space In addition to general good wiring practices take into account Ethernet CAT5 or greater cable is requi
144. will be from 52 to 57 and the humidification proportional range will be from 48 to 43 Dehum Heat Low Limit 1 Sets the temperature at which one of two compressors will be deactivated for dehumidification control Unit must be set for two compressor dehumidification for this value to be settable Example If Low Limit 1 is set to 4 F 2 2 C and the temperature setpoint is 70 F 21 1 C then one of the two compressors will turn off at 66 F 18 8 C Dehum Heat Low Limit 2 Sets the temperature at which dehumidification is stopped Example If Low Limit 2 is set to 8 F 4 4 C and the temperature setpoint is 70 F 21 1 C then all dehumidification will be deactivated at 62 F 16 6 C 64 Service Menu Parameters Figure 49 Setpoints screen page 3 of 6 SETPOINTS pg 3 of 6 4 UNIT 01 gt SPA PASSWORD Actual Level 0 7 SPA Supply Sensor Control SAP Supply Setpoint 50 F SP Supply Control Type Proportional SAPAA Supply Proportional Band 12 F SP Supply Integration min SIE Supply DeadBand OF Valve Pulse 3 S464 Cooling Filter at 0 100 100 00 100 s SIR Return Compensation oF 4 for next previous unit gt to select parameter then to change parameter to confirm Supply Sensor Selects how the supply sensor will be used by the control The choices are Disabled Cooling Only Control and Limit See 3 7 Supply Control for a detailed description The supply sensor can only be set to Co
145. witch and the P64 port on the back of the display This will enable control and monitoring capabilities to any cooling unit connected to the network Combining Large and Small Displays on a U2U Network Setting up a network of cooling units equipped with large and small displays requires a network switch The controls are to be connected to the switch as described above Figure 32 Wiring a small display for stand alone operation Small Graphics Display CANbus Cable Liebert iCOM Control Board E1 E2 E3E4 TB1 Fz lesooocoo 144 Unit Electronics Compartment 50 Installing a Liebert iCOM Unit to Unit Network Figure 33 Wiring a small display for U2U network operation CAN Cable 8P P64A Connection if provided lt Near I O Board x Not Used T Standard Small 8P Graphics Display JE EJ F Rear View P64 P65 i ES A U2U Networking Switch EN Field Supplied Liebert iCOM 7 DA DA LA GA LA GA Ld LA I O Board E F N Straight Through To From Other Ethernet Cable Networked Units If the coupler is not provided in the unit connect the other end plug straight into Port P64 of the Liebert COM I O board 51 Installing a Liebert iCOM Unit to Unit Network Figure 34 Wiring a large display for U2U network operation Ethernet Cable Crossover Coupler if provided P64 Poe POT See Note 4 P64A Connection gp
146. xt Maintenance 4 for next previous unit then to change parameter SYSTEM 08 17 2010 NOBODY No 08 2011 to select parameter to confirm Maximum Frequency Per year Sets the number of expected maintenance visits in a one year time span Max Bonus Increase the time to the next maintenance cycle Service personnel should assign a bonus when a service visit finds that all components are working optimally Max Penalty Decrease the time to the next maintenance cycle Service personnel should assign a penalty when a service visit finds excessive wear on components Last Maintenance Indicates to service personnel the date of the last visit This parameter is set during the service call Service Engineer Provides a label for the service representative to list either the company name or representative s name Confirm PM Confirms that the service representative has completed the preventive maintenance and resets the next maintenance date Calculated Next Maintenance Provides a date to when the next expected maintenance should take place based on the last confirmed PM component starts run hours and the penalty bonus currently set in the Liebert COM Figure 55 Wellness Motor settings screen page 2 of 8 WELLNESS motor settings page 2 of 8 PASSWORD Actual Level 0 Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of Alarms Actual

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