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Emerson Liebert iCOM User's Manual

1. Table 29 Sensor calibration setup parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 3 Password PASSWORD W Return Temperature RTN TEMP W 18 F 9 9 C Calibrated Return Temperature CAL TEMP R 32 122 F 0 50 C Return Humidity RTN HUM W 19 9 Calibrated Return Humidity CAL HUM R 20 80 Digiscroll 1 NTC DS1 NTC W 18 F 9 9 C Calibrated Digiscroll 1 NTC CAL DS1 R 84 313 F 29 156 C Digiscroll 2 NTC DS2 NTC W 18 F 9 9 C Calibrated Digiscroll 2 NTC CAL DS2 R 84 313 F 29 156 C Page 2 of 3 Password PASSWORD W Temperature Sensor A TEMP A W 18 F 9 9 C Calibrated Temperature Sensor A CAL A R 32 122 F 0 50 C Humidity Sensor A HUM A W 19 9 Calibrated Humidity Sensor A CALA R 20 80 Temperature Sensor B TEMP B W 18 F 9 9 C Calibrated Temperature Sensor B CAL B R 32 122 F 0 50 C Humidity Sensor B HUM B W 19 9 Calibrated Humidity Sensor B CAL B R 20 80 Page 3 of 3 Password PASSWORD W 69 Service Menu Parameters 3 Table 29 Sensor calibration setup parameters Function Read Range Large Display Small Display Write Imperial metric Freecool Sensor PTC or NTC FC SNSR W PTC NTC Freecool Sensor FC SNSR W 18 F 9 9 C Calibrated Freecool Sensor CAL FC R 4 113 F 15 to 45
2. Table 20 Total run hours parameters Puncher Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Actual Hours Limit Fan Motor s MOTOR S W 0 32000 Fan Motor s Limit LIMIT W 0 32000 Compressor 1 COMP1 W 0 32000 Compressor 1 Limit LIMIT W 0 32000 Compressor 2 COMP2 Ww 0 32000 Compressor 2 Limit LIMIT Ww 0 32000 Chilled Water Free Cool CW FC W 0 32000 Chilled Water Free Cool Limit LIMIT W 0 32000 HotGas HotWater HG HW W 0 32000 HotGas HotWater Limit LIMIT W 0 32000 Electric Heater 1 EL HEAT1 W 0 32000 Electric Heater 1 Limit LIMIT W 0 32000 Electric Heater 2 EL HEAT2 W 0 32000 Electric Heater 2 Limit LIMIT W 0 32000 Electric Heater 3 EL HEAT3 W 0 32000 Electric Heater 3 Limit LIMIT W 0 32000 Humidifier HUM W 0 32000 Humidifier Limit LIMIT W 0 32000 Dehumidification DEHUM W 0 32000 Dehumidification Limit LIMIT W 0 32000 Table 21 Timer parameters Sleep Mode Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Password PASSWORD W Sleep On Mon MON W No Yes Tue TUE W No Yes Wed WED W No Yes Thu THU W No Yes Fri FRI W No Yes Sat SAT W No Yes Sun SUN W No Yes Sleep Every Day 1 From To a Ae w Time hh mm Sleep Every Day 2 From To A w Time hh mm Timer Mode TIME MOD W NO YES AUTO 54 User Menu Parameters 2 Table 21 Timer parameters Sleep Mode
3. Function Read Range Large Display Small Display Write Imperial metric Timer Mode Type TIME TYP W System Off DeadBand Dead Band DEADBAND W 4 27 F 2 15 C pe Table 22 Service contacts parameters lt Function PEA Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Address line 1 Address line 1 A B R text string Address line 2 Address line 2 A B R text string Address line 3 Address line 3 A B R text string Address line 4 Address line 4 A B R text string 55 Service Menu Parameters 8 0 SERVICE MENU PARAMETERS Service menus allow customized settings for site operations The password for service menu parame ters 1s 5010 The COM control 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 dis play Please check www liebert com for the latest COM User manual updates C F Table 23 Setpoints parameters RH Function SET Read Range Large Display Small Display Write Imperial metric Page 1 of 5 Password PASSWORD W Temperature Setpoint TEMP SET W 41 104 F 5 40 C Control Type CTRL TYP W Proportional PI PID Intelligent Temperature Proportional Band TEMP PB W
4. EEEE ELI Unit Electronics Compartment 182964 Page 1 Rev 0 To Other Units 64 nodes total maximum of 32 input output boards 45 Installing a Liebert COM Unit to Unit Network Figure 27 Wiring a large display for stand alone operation Large Graphics Display On Unit Accent Stand Alone Unit 6 Wire Cable Liebert Supplied s R o Crossover P64 P66 P67 Coupler F F U2U CAN CAN 8 Wire Crossover d d SEd ES T T T T P18 P65 COM E Microprocessor and I O Board FH PI P54 TB1 P39 ff P P38 A P22 T _Psz psr 1123 1 1 1 1 00000000 T 182964 Unit Electronics Compartment Large Graphics Display On Unit Accent Unit to Unit Communications 6 Wire Cable Page 2 Rev 0 8 Wire Crossover Ethernet Cable Red Unplug Red Cable From P64 and Connect to One Side of Crossover Coupler 2 Straight through Ethernet Cables o GJo GEEK Connect One to P64 P18 P65 iCOM T eed T ved 9Ed SEd H Microprocessor and l O Board gt and One to e Crossover Coupler As Shown PAP Tt emoe P38 P39 _P53 P52 P51
5. 17 3 3 1 Temperature Proportional Band 17 3 02 Compressor Control ii A Be bel AP APE kd AA e de 18 3 8 8 Chilled Water Control i areni e eaa E ene een eee ene 21 Temperature Control Second Cooling Source 0 0 00 ees 21 3 4 1 Differential Temperatures Controls Comparator Circuit ooooooooooooo 21 Temperature Control Reheat 0 ccc eee ees 23 3 5 1 Three Stage Electric Hot Gas and Hot Water Reheat 0 0 0 cece eee 23 3 092 gt BOR Reheat 2005 06 AL eek A bh ROG AHL A Ml O de eta 25 Humidity Control wa ye A A a ae eae A ile AA 27 361 Humidificationn cd dE WW Wa ee A Ee en oa ee is kee a 28 3 6 2 Dehumiditicati i034 daw cae Gs a ate A cag alee ete ted lace ow 29 Control Py PES A A A AAA ee E ele a 30 3 7 1 Temperature and Humidity Control Types 0 0 ccc ce 30 3 7 2 Humidity Sensor Reading Control Types 31 3 7 3 Supply Limit Optional 0 00 00 ee cee eee ence ene 32 3 7 4 High and Low Temperature and Humidity Events 0000 cece ee eens 32 3 7 5 User Inputs Customer Inputs 0 0 0 ce eee anna nne 33 3 7 6 Event Types and Properties 34 Possible Event Notifications u 60400 nak oes ea ave ol Sees weed and KA PG ae sed eek 36 3 9 4 0 4 1 5 0 5 1 5 2 5 3 5 4 6 0 7 0 8 0 Next Maintenance Calculation ce ec eee ee eee eens 37 3 9 1 Calculation of Next Maintenance and Diagnostics 0 0 0
6. Temp 100 100 Heating Setpoint Cooling Temp Y Proportional Band Y Proportional Band When the return air temperature deviates from the setpoint it begins to penetrate one of the propor tional band halves cooling or heating If the return air temperature increases the control calls for 0 none to 100 full cooling capacity based on how far the temperature penetrates the cooling portion of the proportional band If the return air temperature decreases the control calls for 0 none to 100 full heating capacity based on how far the temperature penetrates the heating portion of the proportional band 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 The control varies the call for cooling and heating in 1 increments as the return air temperature moves through the proportional band halves The deadband range is used to widen the setpoint When the return air temperature falls within the deadband the control operates the same as if the temperature equaled the setpoint exactly This set ting helps maximize component life by preventing excessive component cycling The Temperature Proportional Band and Temperature Deadband parameters are in the Service menu under the Set points submenu The Temperature Setpoint parameter is in both the User Menu and Service Menu under S
7. 3 9 1 Next Maintenance Calculation The next maintenance calculation as well as the included diagnostics feature will help run the cool ing unit optimally to ensure minimum component stress resulting in maximum reliability The diag nostics will help the service engineer evaluate the unit s operation reading back operational data since the last maintenance Calculation of Next Maintenance and Diagnostics The following components are included in the calculation each one individually e Fan s Compressor 1 Compressor 2 Electric Heaters e Humidifier For each individual component the next maintenance will be calculated from the following parame ters 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 Maximum number of starts per hour to be set Maximum bonus to enlarge time to next maintenance to be set Maximum penalty to reduce time to next maintenance to be set Calculating Unit Wellness Liebert COM 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 sta
8. 36 Sample Liebert COM network configurations auaaaaaaaaaaaaa aaa aaa aaa cia 43 Ports available for connecting Liebert COM control devices uaaaaaa aa aaa aaa ai 47 Setpomts parameters porto di O Te are aaa BOW oie rach Aa 51 Spare part list parameters large display only ooo cette nee 51 Event logs Parameters wodoci WO EO WOW PRES Ds BS W eae 51 View network parameters large display only o o o o ooooooo ooo o 51 CA A E r BA W A A aA 52 Set alarms parameters ye ze ooo A A kdo SAS bd e MaG NE GE 52 Active alarms parameters Laaaaaaaaaaaaaaaaaaaaaaaaanaaai eee ene ia 53 Display setup parameters 53 Timer parameters Sleep Mode 54 Total run hours parameters 54 Service contacts parameters 55 DEtpoOlits parameters ii A DORA A aa 56 Unit diary parameters ati A aa a Gide Peed a di wid i 57 Maintenance wellness settings parameters Luaaaaaaaaaaaaaaaaaaaaaaaa aaa iii 58 Standby settings lead lag parameters 58 Diagnostics service mode parameters LLuaaaaaawawawaaaaaaaaaaaaaaaaaaa aaa ii 61 Set alarms parameters uuauaaaaaaaaaaaaaaaaaaaaaaaaaniaaa a a ia 63 Sensor calibration setup parameters 69 System network setup parameters large display OM ly o oooooooooooo ooo o 70 Network setup parameters 71 Options Setup parameters naie a eae w ais 73 Service contact info parameters 74 Introduction 1 0 INTRODUCTION
9. 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 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 motor protection monitors for main fan overload and the differential pressure switch ensures that the blower s are moving air If either protection device triggers an alarm will be announced by a buzzer alarm relay and event to monitoring after an adjustable time delay Main Fan Overload and Loss Of Airflow in Service Menu Set Alarms The time delay at the unit start is always five seconds shorter than the control delay to avoid short component starting when the fan is not working During operation the fan delay is fixed to 15 seconds There are two selection possibilities for both Loss Of Airflow and Main Fan Overload Shutdown stops the unit intended for DX models Disable stops the humidifier electrical heaters and dehumidification allows cooling and free cooling only intended for chilled water models external cooling NOTE When the Ma
10. 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 capac ity 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 23 Teamwork Mode 1 with two cooling units System Deviation 60 System Proportional Band Temp Y Proportional Band Temp 100 0 100 Setpoint Unit1 Deviation 100 Unit2 Deviation 20 Individual Units T 0 Y Proportional Band Smp Y Proportional Band Temp E 100 0 100 Setpoint Setpoint 40 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 proport
11. No Contact e Value The No setting is for standard compressorized and chilled water units that do not have a second cool ing source The Contact setting is used when an external control is being used to determine when the second cooling source is to be activated The external control communicates to the Liebert unit via a contact closure Closed cooling enabled Open cooling disabled 21 Operation The Value setting is the factory default setting on free cooling and dual cooling units If the tempera ture difference between the second source cooling fluid parameter Free cooling 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 delta T between room and glycol true 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 18 Figure 18 Second cooling source and compressorized cooling Temp Setpoint 70 F Proportional Band 8 F Deadband 2 F Valve Valve 100 Cool 1 Cool 2 Closed Open
12. Proportional Band 100 Humidification Setpoint Dehumidification When the return air humidity deviates from the setpoint it begins to penetrate one of the propor tional band halves either dehumidification or humidification 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 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 dehumidifying 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 Propor tional Band and Humidity Deadband parameters are in the Service menu under the Setpoints sub menu The Humidity Setpoint parameter is in both the User menu and Service menu under Set
13. R NOTE To enabled disabled delay activation and set event type alarm warn message see Event Types on page 34 Table 7 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 Event Electrical Heaters Disabled Hum Lockout 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 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 33 Operation 3 7 6 Event Types and Properties Liebert COM 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
14. 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 consulting the factory first 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 Default Setting On blank units without compressors All Chilled Water Units 1 Compressor 1 dehumidifies only Liebert Challenger 3000 Liebert DS Low Limit 2 only Liebert Deluxe System 3 2 Compressor 2 dehumidifies only 1 or 2 Compressor 1 and 2 alternate Low Limit 1 8 2 Both both compressors dehumidify Low Limit 1 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 7 3 7 1 Reheat During Dehumidification Hot gas reheat or hot water reheat will start as described in 3 5 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
15. Active Alarms System Network Setup Display Setup Options Setup Total Run Hours Service Contact Info Sleep Mode 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 7 Menu tree Large display networked UnitH or System will be displayed in the top left corner of the screen Status Menu Unit 1 View Status Menu System View Networked Large Display Only Status Menu Unit 2 3 4 User Menu Service Menu Advanced Menu Unit Unit Unit Password Password Password Setpoints Setpoints Factory 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 Active Alarms Display Setup Total Run Hours
16. 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 a disabled event set to Warn or to Alarm becomes active it will lock itself Disabled events may be reset only through the menu item Reset Disabled Alarms NOTE The value of the external delay includes the internal delay external delay setting 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 8 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
17. Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 FIGURES Liebert iCOM components iii i ii Liebert iCOM display components Status menu large display graphical vieW o o o o nana eee Liebert iCOM default screen symbols Menu tree Small display stand alone or networked 00 00 eee eens Menu tree Large display stand alone o oooooocrorrrr rro een ne ees Menu tree Large display networked eee eee ees User menu ACASO A ce dein dep E Cad eileen tne bathe Servicemenu Cons Aina a a arn a E e ta Gey Pesta toe e Start stop priority switches Temperature proportional band One single step compressor without unloaders 0 0 0 0 eee eens Two single step compressors without unloaders or one compressor with an unloader GWO SLED oeren Sea AS Dalila WREN Dae BS bed Hea ROG bb ete da Two compressors with unloaders four step 0 0 0 cee een eens Digital scroll capacity modulation 10 100 variable 0 0 0 0 0 ccc ces Single and dual digital scroll compressor activation pointS 0 0 eee Three point actuator control example cooling 1 0 eee eens Second cooling source and compressorized cooling n nuesa ce cee oo Three stage Heating a dde Two single step compressors with SCR reheat set to Tight mode ooooooooo o Two single step compressors with SCR reheat set to Standard mode 11111 Humidity proportional band Teamwork M
18. WARNING ACTIVATES ALARM RELAY WA AC AL W No Yes Reset Disabled Alarms AL RES W No Yes Page 3 of 7 PASSWORD W DELAY MAIN FAN OVERLOAD FOL W 0 9999 sec LOSS OF AIRFLOW LOA W 0 9999 sec CLOGGED FILTERS CF W 0 9999 sec HIGH ROOM TEMP HRT W 0 9999 sec LOW ROOM TEMP LRT W 0 9999 sec HIGH ROOM HUM HRH W 0 9999 sec LOW ROOM HUM LRH W 0 9999 sec 64 Service Menu Parameters Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metric HIGH TEMP SENSOR A HTA W 0 9999 sec LOW TEMP SENSOR A LTA W 0 9999 sec HIGH HUM SENSOR A HHA W 0 9999 sec LOW HUM SENSOR A LHA W 0 9999 sec ENABLE DISAB MAIN FAN OVERLOAD FOL W Disabled Enabled LOSS OF AIRFLOW LOA W Disabled Enabled CLOGGED FILTERS CF W Disabled Enabled HIGH ROOM TEMP HRT W Disabled Enabled LOW ROOM TEMP LRT W Disabled Enabled HIGH ROOM HUM HRH W Disabled Enabled LOW ROOM HUM LRH W Disabled Enabled HIGH TEMP SENSOR A HTA W Disabled Enabled LOW TEMP SENSOR A LTA W Disabled Enabled HIGH HUM SENSOR A HHA W Disabled Enabled LOW HUM SENSOR A LHA W Disabled Enabled TYPE MAIN FAN OVERLOAD FOL W MSG WRN ALM LOSS OF AIRFLOW LOA W MSG WRN ALM CLOGGED FILTERS CF W MSG WRN ALM HIGH ROOM TEMP HRT W WRN LOW ROOM TEMP LRT W WRN HIGH ROOM HUM HRH W WRN LOW ROOM H
19. ccc eee eee 37 TEAMWORK ii Ss A wh Oe res ata ana ete Magi eee eee 39 Teamwork Modesrs ies0 8 ci brad ns Wi Baa ACE eR EIS BI EO ENR 39 4 1 1 Application of Teamwork Modes 0 0c ce cee nee e eens 39 AV 2 NOGA ti Work a owady A A tddi 39 41 95 Teamwork Model dre i soon oda BEGA ese na Eee earn ale ee Gad A Bh 39 41 4 Teamwork Mode 1144 4543 cee Aes Re piwa A MA WAGA W A AO ET Bo COO M 41 4 1 5 Standby Rotations 24 sd bobik EW dwa i BD IA 41 INSTALLING A LIEBERT ICOM UNIT TO UNIT NETWORK oooooooooooomoos 42 Placememt of Cooling Units eisrean Aad cit wdra bi io taa WE EA WA 42 U2U Hardware Cables and Network SwitcCh ooooooooooooonomomoromoo 42 Wiring for Unit to Unit Communications U2U ui a was 43 5 8 1 Wiring a Liebert iCOM U2U Network o o ooo anna aaa i ia 44 External Communications Building Management Systems Liebert SiteScan gt MOUNTING A LARGE DISPLAY ON A WALL 000 cee eee ee eee eee eee ees 49 6 0 1 Location Consid erations eua waka OW WO Hoes Apis 49 USER MENU PARAMETERS A epee eat eas 51 SERVICE MENU PARAMETERS 00 0c cece eee eee e eee mannaa nana eee e eens 56 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26
20. 1 of 2 Unit Password W Monitoring Address W 1 99 Monitoring Timeout R Yes No Monitoring Handshake W 0 120 Unit Name W 6 digits Configuration Safe R rasa Un Configuration Safe W No Save Load Network Safe R A ja Network Safe W No Save Load SW Version W Page 2 of 2 Password W Monitoring Protocol W No Velocity Hironet IGM IP Address W IP Range 71 Service Menu Parameters Table 31 Network setup parameters Function Read Range Large Display Write Imperial metric Netmask W Netmask Range Gateway W Gateway Range MAC R MAC Range U2U Protocol W GBP U2U Address W 1 32 U2U Group W 1 99 Bootloader Variables R id wo R basta na Bootloader Variables W No Save Reboot Static RAM R MROK Static RAM W No Clear Reboot 72 Service Menu Parameters r L rd s Table 32 Options setup parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 3 Password PASSWORD W Compressor Sequence COMP SEQ R Auto 1 2 Low Pressure Alarm Delay LP DELAY W 0 5 min Electric Stages EL HEAT W 0 1 2 3 Hot Water Heat On Off HW HEAT W No Yes Total Heat Stages ALL HEAT R 0 1 2 3 LWD Connected LWDconn W No Yes 3P Actuator Runtime 3P RUN W 30 500 sec 3P Actuator Direction 3P DIR W Direct Reverse Page 2 of 3 Password PASSWORD W Humidification Enabled HUM ENAB
21. 2 54 F 1 30 C autoset Temperature Integration Time TEMP INT W 0 15 min autoset Temperature Derivative Time TEMP DER W 0 900 sec AutoSet Enable AUTOSET W No Yes Temperature DeadBand TEMP DB W 0 36 F 0 20 C Second Setpoint 2ND SETP W 41 104 F 5 40 C Backup Temperature Setpoint BACK TSP W 41 104 F 5 40 C Page 2 of 5 Password PASSWORD W Humidity Setpoint HUM SET W 20 80 Humidity Control Type HUM CTRL W Relative Compensated Predictive Humidity Proportional Band HUM PB W 1 20 Humidity Integration Time HUM INT W 0 15 min Humidity Deadband HUM DB W 0 50 Dehum Heat Low Limit 1 LO LIM 1 W 9 9 F to 2 0 F Dehum Heat Low Limit 2 LO LIM 2 W 9 9 F to 2 0 F internal variable Low Limit 1 reset pa era internal variable Low Limit 1 reset 2 erg Page 3 of 5 Password PASSWORD W Supply Limit SUP LIM W Enabled Disabled Supply Limit Temp Value SUP TEMP W 41 77 F 5 25 C DT between Room FC Type FC TYPE W No Contact Value DT between Room Air FC Fluid FC DT W 0 36 F 18 2 C Minimum CW Temp MIN CW W No Yes Minimum CW Temp Value MIN CW W 32 68 F 0 20 C VSD Fanspeed FANSPEED W Auto Manual 56 Service Menu Parameters C F RH SET Table 23 Setpoints parameters Functi PARON Read Range Large Display Small Display Write Imperial metric VSD Setpoint VSD SET W 0 100 Pag
22. 999 Actual LP1 Pressure RAT A dE Bom Actual LP2 Pressure LPZACT R toot obaj Actual HP1 Pressure NETAST R oot oba Actual HP2 Pressure Peery R hone So Page 2 of 7 Password PASSWORD W Manual Mode MANUAL W No Yes Motor s MOTOR S W Off On Compressor 1 COMP1 W Off On Compressor 1 C1 MODE W Run Evacuate Charge Compressor 1 Capacity C1 CAP W Off On Compressor 1 Cycle Ramp C1 CYCLE W 0 100 Compressor 1 LLSV LLSV 1 W Off On Compressor 2 COMP2 W Off On Compressor 2 C2 MODE W Run Evacuate Charge Compressor 2 Capacity C2 CAP W Off On Compressor 2 Cycle Ramp C2 CYCLE W 0 100 Compressor 2 LLSV LLSV 2 W Off On Page 3 of 7 Password PASSWORD W Electric Heat 1 or HG HW EL HEAT1 W Off On Electric Heat 2 or E Heat 1 EL HEAT2 W Off On Electric Heat 3 or E Heat 2 EL HEAT3 W Off On SCR Heat SCR HEAT W 0 100 Dehumidification Output DEHUM W Off On Humidfier Fill HUM FILL W Off On Humidifier HUM W Off On Humidfier Drain H DRAIN W Off On Humidifier Current HUM C R 0 00 99 99A Page 4 of 7 61 Service Menu Parameters SERVIC Table 27 Diagnostics service mode parameters continued Function Read Range Large Display Small Display Write Imperial metric Password PASSWORD W Alarm Relay ALM REL W Off On FC Relay FC REL W Off On 3P Actuator Open 3P OPEN W Off On 3P Actuator Close 3P CLOSE W Off On BV Control
23. BV CTRL W Manual Auto Analog Out 1 ANALOG1 W 0 100 Analog Out 2 ANALOG2 W 0 100 Analog Out 3 ANALOG3 W 0 100 Analog Out 4 ANALOG4 W 0 100 Page 5 of 7 Status Remote Shutdown RSD R On off Status Airflow Loss AIR LOSS R OK Act Status Motor Overload MOTOR OL R OK Act Status Filter FILTER R OK Act Status Customer Input 1 CUSTOM 1 R OK Act Status Customer Input 2 CUSTOM 2 R OK Act Status Customer Input 3 CUSTOM 3 R OK Act Status Customer Input 4 CUSTOM 4 R OK Act Status Heaters Safety HEAT SAF R OK Act Loss of Airflow At FLOW AT W 0 100 Actual Airflow FLOW ACT R 0 100 Page 6 of 7 Status HP1 HP1 R OK Act Status LP1 LP1 R OK Act Status C1 OL C1 OL R OK Act Status HP2 HP2 R OK Act Status LP2 LP2 R OK Act Status C2 OL C2 OL R OK Act 62 Service Menu Parameters SERVIC SET ALARMS Table 27 Diagnostics service mode parameters continued Function Read Range Large Display Small Display Write Imperial metric Page 7of 7 Status Humidifier Problem HUM PROB R OK Act Status DT1 Outdoor Glycol DT1 R OK Act Status DT2 Glycol Room DT2 R OK Act Status DT3 Room Setpoint DT3 R OK Act Status Min CW MIN CW R OK Act LWD Value LWD Val R Off On Status LSI LSI R Off On Table 28 Set alarms parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 7 Pass
24. C Supply Sensor PTC or NTC SUP SNSR W PTC NTC Supply Sensor SUP TEMP W 18 F 9 9 C Calibrated Supply Sensor CAL SUP R 32 122 F 0 50 C Temperature Sensor C TEMP C W 18 F 9 9 C Calibrated Temperature Sensor C CAL C R 32 122 F 0 50 C Humidity Sensor C HUM C W 9 9 Calibrated Humidity Sensor C CAL C R 20 80 Table 30 System network setup parameters large display only Function Read Range Large Display Small Display Write Imperial metric Page 1 of 2 Password PASSWORD W ee of Connected w 1 32 Teamwork Mode W No 1 2 Configuration Safe 1 R a o Uan AR Configuration Safe W No SaveLoad Network Safe R Z A Network Safe W No Save Load SW Version W Page 2 of 2 Password PASSWORD W IP Address W IP Range 70 Service Menu Parameters Table 30 System network setup parameters large display only Function Read Range Large Display Small Display Write Imperial metric Netmask W Netmask Range Gateway W Gateway Range MAC R MAC Range U2U Protocol W GBP U2U Address W 33 64 U2U Group W 1 99 Bootloader Variables ue R nak adne Bootloader Variables W No Save Reboot Table 31 Network setup parameters Function Read Range Large Display Write Imperial metric Page
25. 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 set tings 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 inde pendent of the selected event type or if enabled or disabled The timing will function as set NOTE Not all critical event properties can be adjusted 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
26. NOTE Q Menu settings may be viewed without a password but changing settings requires a password If a password is required Liebert iCOM shows a prompt to enter the 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 To access the User Service or Advanced menu press the Enter or down arrow key while viewing the Status menu of the unit you wish to access The User menu will be displayed first To view the Service or Advanced menus press the right arrow key Accessing Submenus on Small Displays While viewing the menu you wish to access 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 parameters is displayed Press the enter key and use the up and down arrow keys to scroll through the parameters one by one Pressing the Esc key will go back a level Figure 5 shows the Liebert iCOM control menus for a small display Accessing Submenus on Large Displays While viewing the menu you wish to access User Service or Advanced press the enter key to high light the first icon Use the arrow keys to navigate through the icons With the desired icon high lighted pr
27. cooling and humidity control of the condi tioned 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 individual units or of the entire system NOTE The maximum number of cooling units that may be interconnected is 32 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 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 required 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 electr
28. 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 16 Single and dual digital scroll compressor activation points Comp 1 8 2 On Temp Setpoint 70 F Fully Loaded Proportional Band 8 F Comp 2 On Partially Deadband 2 F Loaded ra Comp 1 On Partially A Loaded Y Dead 0 Comp 1 A Wan Cooling Off i i ooling 4 Comp 2 i I Off I Proportional Band Increasing Temperature 20 Operation 3 3 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 Units with the optional variable speed drive VSD control the fan speed in a similar manner except that the minimum fan speed is 60 when the cooling requirement is less than 60 Also the fan is operated at 100 on a call for any heating and or humidification A three point actuator is used for chilled water cooling as well as free cooling or heating with either valves or dampers These actuators are driven through two digital outputs Open and Close The Three Point Actuator Running Time Service Menu Options Setup defines the time needed to move the valve or damper from closed to open The Actuator Direction Service Menu Options Setup defines if the valve damper works in direct or reverse mode the controller outputs are e
29. number of starts average running time Last Maintenance date can be set from service engineer informational Service Engineer name of the service engineer editable Reset puts all counters of all components such as motor compressors heaters and humidifier at zero and starts a new maintenance calculation reset to be done after maintenance 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 p
30. parameter does not impact SCR reheat opera tion 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 Dehumidification 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 5 1 Three Stage 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 simulta neously It is very 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 tr
31. to change without notice Hong Kong Liebert is a registered trademark of Liebert Corporation 852 2572220 All names referred to are trademarks Fax 852 28029250 or registered trademarks of their respective owners SL 18835_REVO2_10 08 Emerson Network Power The global leader in enabling Business Critical Continuity EmersonNetworkPower com FP AC Power Hi Embedded Computing I Outside Plant HI Racks 8 Integrated Cabinets FP Connectivity FP Embedded Power FP Power Switching amp Controls FF Services FP DC Power HI Monitoring PP Precision Cooling I Surge Protection Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co 2008 Emerson Electric Co
32. will be forced to 20 Humidity Control Type HUM CTRL w Relative Compensated Predictive Supply Limit SUP LIM W Enabled Disabled Supply Limit Temp Value SUP TEMP W 41 77 F 5 25 C Baek lemperature BACK TPS w 41 104 F 5 40 C Setpoint Spare Part List Large Display Only Displays the various Liebert part numbers for all parts in the cooling unit to simplify ordering replacement parts Table 13 Spare part list parameters large display only EVENT LOG NEJ Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 List of parts N A R Table 14 Event log parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Last 400 events Last 400 events R Table 15 View network parameters large display only Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 AlarmOff Manual LocalOff SystemOff Status Unit 1 32 N A R AlarmStandby Standby TimerOff SystemOn WarningOn AlarmOn Timer Permits viewing all units connected in a network Viewable on a large display only 51 User Menu Parameters SET ALARMS Table 16 Set alarms parameters Punedon Read Range Large Display Small Disp
33. 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 SENSOR A 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 Calc 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 ee 88 Wa 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 s
34. 2 Compressor Control Figure 21 illustrates how SCR reheat operates when SCR Control Type is set to Standard mode Figure 21 Two single step compressors with SCR reheat set to Standard mode Temp Setpoint 70 F Proportional Band 8 F Cool 2 Deadband 0 F Cool 1 On On SCR i On I I l eb 67 68 69 7 7 71 T 73 AN 100 0 100 Heating Cooll1 Off Cobl 2 I Cooling i SCR Off Y Proportional Band Y Proportional Band Cooling 2 On 26 Operation 3 6 Humidity Control The control uses the humidity proportional band to determine which operation to perform dehumidi fication humidification and how intensely to perform it 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 An 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 22 illustrates how the humid ity proportional band is evenly divided on either side of the humidity setpoint with and without a deadband Figure 22 Humidity proportional band WithoutDeadband Humidification Dehumidification Hum 100 Proportional Band 0 Proportional Band jo humidification Setpoint 100 Dehumidification With Deadband Humidification Hum 100 Proportional Band
35. COM input output board A network switch is not needed see Figure 24 Figure 24 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 connect a straight through CAT5 Ethernet cable from the P64 connector on each cooling unit s Liebert COM input output board to a common network switch see Figure 26 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 provided with the unit Con nect 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 28 NOTE Only cooling units with large displays are supplied with a female female coupler inside the unit from the factory 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 120V input power Liebert provides an AC adapter wall plug A straight through Ethernet cable must be connected between the network sw
36. 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 set up to work together in any of three team work modes No Teamwork Teamwork Mode 1 and 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 41 Autoset will not adjust the proportional band in Teamwork mode No 4 1 3 Teamwork Mode 1 Teamwork Mode 1 works best in small rooms with balanced heat loads This mode does not operate based on the most demanding unit on the network 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 con trol The master unit will send the performance requests unitwise according to unit numbers rotated by one unit every 24 hours In this teamwork mode mo
37. On On I I 100 Cooling nf m 72 B Tf Y 7 78 PN 0 Y Proportional Band Y Proportional Band b 200 Cooling Bandi 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 control and compressor control This feature is enabled in the Service menu under Setpoints parameter Minimum CW Temp 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 22 Operation 3 5 3 5 1 GLYCOOL Cooling Free Cooling When GLYCOOL cooling is available the temperature control will calculate a total cooling require ment of 200 rather than 100 Assuming that full GLYCOOL capacity is available the GLYCOOL valve opens proportio
38. P 2 HIGH PRESSURE HP2 W MSG WRN ALM COMP 1 LOW PRESSURE LP1 W MSG WRN ALM COMP 2 LOW PRESSURE LP2 W MSG WRN ALM COMP 1 PUMPDOWN FAIL PD1 W MSG WRN ALM COMP 2 PUMPDOWN FAIL PD2 W MSG WRN ALM DIG SCROLL1 HIGH TEMP HT1 W MSG WRN ALM DIG SCROLL2 HIGH TEMP HT2 W MSG WRN ALM EL HEAT HIGH TEMP EHO W MSG WRN ALM Page 5 of 7 PASSWORD W DELAY WORKING HRS EXCEEDED WHE W 0 9999 sec SMOKE DETECTED SMO W 0 9999 sec WATER UNDER FLOOR WUF W 0 9999 sec COND PUMP HIGH WATER CPH W 0 9999 sec LOSS OF FLOW LOF W 0 9999 sec STBY GLYCOL PUMP ON SGP W 0 9999 sec STANDBY UNIT ON STB W 0 9999 sec HUMIDIFIER PROBLEM HUP W 0 9999 sec NO CONNECTION w Unit1 NOC W internal UNIT X DISCONNECTED W internal LOSS OF POWER LOP W internal ENABLE DISAB WORKING HRS EXCEEDED WHE W Disabled Enabled SMOKE DETECTED SMO W Disabled Enabled WATER UNDER FLOOR WUF W Disabled Enabled 66 Service Menu Parameters Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metric COND PUMP HIGH WATER CPH W Disabled Enabled LOSS OF FLOW LOF W Disabled Enabled STBY GLYCOL PUMP ON SGP W Disabled Enabled STANDBY UNIT ON STB W Disabled Enabled HUMIDIFIER PROBLEM HUP W Disabled Enabled NO CONNECTION w Unit1 NOC W Disabled Enabled UNIT X DISCONNECTED W Dis
39. P Precision Cooling For Business Critical Continuity Liebert COM User Manual Intelligent Communications Monitoring EMERSON 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 TABLE OF CONTENTS INTRODUCTION 2 A da ee ee 1 Features ad AA A A A A aes ate IA A A esa 1 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS ooo ooooooomoon a 2 Navigating Through the Liebert iCOM Menus aaaaaa aaa aaa eee eee 5 21A Control Interface 4 04 io PGA Med Sad A PS Kad ehh oh to a 5 2 1 2 Accessing Submenus uabaaaaaaaaaaakaaaaaaaaaaaazan ania ia 5 2123 E terting a Password sico ic ot eta a ld 6 2 1 4 Viewing Multiple Units with a Networked Large Display ooooooooo o o 8 OPERATION e ane E A ee Gene A KE Ba PEE Soa aoe 12 Single Unit Functions ss a oner a A A a DA A 12 SLT Unit Ean Controla a O A AA bk Rg WI 12 3 1 2 Chilled Water Units with Variable Speed Motor 0 0 00 o 13 3 1 3 General Compressor Requirements 14 3 1 4 Compressor Timing Units With Two Compressors aaaaaaaaaaaaaaaa aaa o 15 3 1 5 Compressor Sequence 15 Motorized Ball Valve in Digital Scroll Units oooooooooooomooorro oo 16 3 2 1 MBV Operation After Compressor is Turned Off 0 0 0 0 ccc eee ees 16 3 2 2 Service Offset Changing System Pressure Settings 0 0 0 cece eee ene 16 Temperature Control Single Source Cooling No Extra Cooling Coil
40. P4 T 1 0000005 44414 Networking Switch 182964 Page 2 Rev 0 Unit Electronics Compartment LA LA LA To Other Units 64 nodes total maximum of 32 input output boards 46 Installing a Liebert COM Unit to Unit Network Figure 29 Liebert iCOM input output control board P65 P64 RJ 45 Jack et a o Ele a ga a a o x Liebert vNSA The Liebert vNSA is designed to connect multiple Liebert iCOM control devices 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 120V or 240VAC 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 trans mit and receive pins See the Liebert vNSA user manual SL 18840 for more details The number of ports available for connecting Liebert COM control devices varies by model as shown in Table 11 Models with a remote 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
41. Sleep Mode Service Contact Info Sensor Calibration Setup System Network Setup Options Setup Service Contact Info Liebert iCOM Display Components and Functions Figure 8 User menu icons USER MENUS TF 5 dale Sie F a gi ae za User Menu password 1490 Table 2 User menu icons Icon Name Description Available On Display SF Vi d ch t t d humidit o iew and change temperature and humidity RH Setpoints setpoints Small amp Large SET A Spare Part List Displays the various part numbers of the Large components parts in the cooling unit oc Event Log Contains last 400 events Small amp Large Graphics Displays temperature and humidity graphs Small amp Large LI View Network Shows status of all connected units Large SET Set Alarms Allows enable disable and settings for alarms Small 8 Large ALARMS SO Sens r Data Shows readings of standard and optional Small amp Large sensors Active Alarms Allows the user to view all current active Small amp Large alarms ACTIVE ALARMS Display Setup Change settings for display language time Small amp Large simple or graphic view SET Total Run Hours Records the run time of all components and Small amp Large allows setting of limits on run time Liebert iCOM Display Components and Functions Table 2 User menu icons continued Icon Name Description Available On Display O i Z Sleep Mode Allows setback s
42. TATION w ERIE MT M E M Th M Fr M Sa M Su Rotate At hour ROT HOUR W 0 13 Rotate At minute ROT MIN W 0 59 Rotate By ROT BY W 1 Perform One Rotation DO ROT W No Yes Cascade Units CASCADE W No Yes Cooling Cool Heat Start all Standby Units STBY HT w No Yes by HT WELLNESS See 3 9 1 Calculation of Next Maintenance and Diagnostics for details on these menus Table 26 Maintenance wellness settings parameters Function Read Range Large Display Small Display Write Imperial metric Basic Settings Page 1 of 8 WELLNESS BASIC Password PASSWORD W Maintenance Frequency Per Year FREQ YR W 0 12 per year Max Bonus BONUS W 0 12 Max Penalty PENALTY W 0 12 Last Maintenance LAST PM W Date Service Engineer SERVICE W Name Confirm PM CONFIRM W No Yes Calculated Next Maintenance NEXT PM W Date Motor Settings Page 2 of 8 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of Alarms ALARMS W 0 32000 Actual Bonus BONUS R 0 12 58 Service Menu Parameters WELLNESS Table 26 Maintenance wellness settings parameters continued Function Read Range La
43. The Liebert COM control offers the highest capabilities in unit control communication and moni toring of Liebert mission critical cooling units Liebert COM 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 COM 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 1 1 Features Large and Small Displays The Liebert iCOM control is available with either a large or small liquid crystal display The Liebert COM 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 COM 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 cool ing 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 spac
44. UM LRH W WRN HIGH TEMP SENSOR A HTA W WRN LOW TEMP SENSOR A LTA W WRN HIGH HUM SENSOR A HHA W WRN LOW HUM SENSOR A LHA W WRN Page 4 of 7 PASSWORD W DELAY COMP 1 OVERLOAD OL1 W internal COMP 2 OVERLOAD OL2 W internal COMP 1 HIGH PRESSURE HP1 W internal COMP 2 HIGH PRESSURE HP2 W internal COMP 1 LOW PRESSURE LP1 W internal COMP 2 LOW PRESSURE LP2 W internal COMP 1 PUMPDOWN FAIL PD1 W internal COMP 2 PUMPDOWN FAIL PD2 W internal DIG SCROLL1 HIGH TEMP HT1 W internal DIG SCROLL2 HIGH TEMP HT2 W internal EL HEAT HIGH TEMP EHO W 0 9999 sec 65 Service Menu Parameters Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metric ENABLE DISAB COMP 1 OVERLOAD OL1 W Disabled Enabled COMP 2 OVERLOAD OL2 W Disabled Enabled COMP 1 HIGH PRESSURE HP1 W Disabled Enabled COMP 2 HIGH PRESSURE HP2 W Disabled Enabled COMP 1 LOW PRESSURE LP1 W Disabled Enabled COMP 2 LOW PRESSURE LP2 W Disabled Enabled COMP 1 PUMPDOWN FAIL PD1 W Disabled Enabled COMP 2 PUMPDOWN FAIL PD2 W Disabled Enabled DIG SCROLL1 HIGH TEMP HT1 W Disabled Enabled DIG SCROLL2 HIGH TEMP HT2 W Disabled Enabled EL HEAT HIGH TEMP EHO W Disabled Enabled TYPE COMP 1 OVERLOAD OL1 W MSG WRN ALM COMP 2 OVERLOAD OL2 W MSG WRN ALM COMP 1 HIGH PRESSURE HP1 W MSG WRN ALM COM
45. W No Yes Infrared Flush Rate IR FLUSH W 110 500 Humidifier Steam Rate HUM STEAM W No Yes Humidifier Bottle Flush Time HumFlush W 5 30 sec Humidifier Bottle Manual Flush ManFlush V Yes No Auto Restart Enabled REST EN W Yes No Single Unit Auto Restart RESTART W 0 999 sec On Off Enabled ONOFF EN W Yes No Page 3 of 3 CW Flush CW FLUSH W 0 99 hours Freecooling Flush FC FLUSH W 0 99 hours Hot Water Flush HW FLUSH W 0 99 hours Ball Valve Setpoint Offset BALL OFF w 9 19 9 bar 26 51 psi 73 Service Menu Parameters lt 20 Table 33 Service contact info parameters Function Large Display Page 1 of 1 Small Display Read Write Range Imperial metric Password PASSWORD Ww 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 2 2 text string 74 Service Menu Parameters Notes 75 Service Menu Parameters 76 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Power the global leader in enablin
46. abled Enabled LOSS OF POWER LOP W Disabled Enabled TYPE WORKING HRS EXCEEDED WHE W WRN SMOKE DETECTED SMO W MSG WRN ALM WATER UNDER FLOOR WUF W MSG WRN ALM COND PUMP HIGH WATER CPH W MSG WRN ALM LOSS OF FLOW LOF W MSG WRN ALM STBY GLYCOL PUMP ON SGP W MSG WRN ALM STANDBY UNIT ON STB W MSG WRN ALM HUMIDIFIER PROBLEM HUP W MSG WRN ALM NO CONNECTION w Unit1 NOC W WRN UNIT X DISCONNECTED W WRN LOSS OF POWER LOP W MSG WRN ALM Page 6 of 7 PASSWORD W DELAY CUSTOMER INPUT 1 cl W 0 9999 sec CUSTOMER INPUT 2 Cl2 W 0 9999 sec CUSTOMER INPUT 3 CI3 W 0 9999 sec CUSTOMER INPUT 4 Cl4 W 0 9999 sec CALL SERVICE CS W 0 9999 sec HIGH TEMPERATURE HTD W 0 9999 sec LOSS OF AIR BLOWER 1 LB1 W 0 9999 sec REHEAT LOCKOUT RL W 0 9999 sec HUMIDIFIER LOCKOUT HL W 0 9999 sec FC LOCKOUT FCL W 0 9999 sec COMPRESSOR S LOCKOUT CL W 0 9999 sec ENABLE DISAB CUSTOMER INPUT 1 cl W Disabled Enabled CUSTOMER INPUT 2 Cl2 W Disabled Enabled CUSTOMER INPUT 3 CI3 W Disabled Enabled CUSTOMER INPUT 4 CI4 W Disabled Enabled CALL SERVICE CS W Disabled Enabled HIGH TEMPERATURE HTD W Disabled Enabled LOSS OF AIR BLOWER 1 LB1 W Disabled Enabled 67 Service Menu Parameters Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metr
47. arameter Decrease Key Down Arrow Moves downward in a menu or reduces the value of a selected parameter 009000006 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 Temperature Humidity Humidity Setpoint Setpoint Sensor System or Reading Unit view Temperature Sensor BANE Supply Reading SF 474 Air Temperature a 1 Percent Hot Water Evaporator 13 F 51 i Heating Fan Speed Percent Electric Heating A a W Percent Cooling gt Le PET AR Br Mesa p FC 3 o Next Maintenance MEA mmm EL Date and Time Y 10 23 2 SYSTEM ON 16 29 2864 13 13 01 ALN HIGH PRESSURE COMPRESSOR 1 10 29 2004 13 12 03 AL Percent Dehumidifying Percent Humidifying System or Unit On Off Most Recent Alarms HIGH PRESSURE COMPRESSOR 2 Do are UE pr reen for help nit or Figure 4 Liebert iCOM default screen symbols fan cooling BH maintenance ks hot water electric heat dehumidification humidification Liebert iCOM Dis
48. connect the switches Table 11 Ports available for connecting Liebert COM control devices 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 LiebertvNSA8 Liebert 8 1 7 COM Yes Liebert vNSA16 16 1 2 13 Liebert COM Liebert VNSA8 Ni 8 8 o Liebert vNSA16 16 2 14 47 Installing a Liebert COM Unit to Unit Network Figure 30 Liebert vNSA with optional remote large display 3 298 dad 5 4 14 25 362mm DPNO001136 Rev 0 External Communications Building Management Systems Liebert SiteScan Liebert COM is capable of communicating with external monitoring systems such as Building Man agement Systems BMS Network Monitoring Systems NMS Liebert s SiteScan Web system and others Each Liebert iCOM 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 HTTP Web and SNMP See the Liebert Web site for the latest supported protocols Modbus refer ence information and SNMP MIB s An alternative limited method of communicating with an existing Liebert SiteScan Web monitori
49. continue to operate as independent units The Liebert COM control 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 con nected no more than 32 may be input output boards 32 cooling units A small display is not consid ered 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 10 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 technicalserviceQemersonnetworkpower com 43 Installing a Liebert COM 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
50. d to support the large display Either of two mounting methods may be used a Secure the back of the large display to the wall by inserting screws or bolts through the elliptical slots recommended mounting method or b Insert screws in the wall and use the keyhole shaped holes on the back of the housing 2 Route the factory supplied power supply cable and field supplied CAT5 Ethernet cable through the wall to the mounting location for connection to the rear of the Liebert COM wall mount display see Figure 31 3 Remove the back of the display by prying it away from the front half of the housing using the coin slots along the seam 4 Insert the power and Ethernet cables through slots in the rear of the display slots are marked Leave adequate slack for connections and mounting To relieve strain on the connections to the display circuit board a Use the strain relief slots above the connections on the upper part of the recessed area to hold the cables b Use a twist tle to secure the cables to the small bridge on the back of the display 5 Position the display and use either of the following methods to attach the display to the wall a Elliptical Slot Mounting Insert the 10 pan head screws or bolts through the elliptical slots and screw into the wall or wall anchors Tighten firmly OR b Keyhole Slot Mounting Insert the 10 pan head screws or bolts into the wall leaving space between the screw head and wall to perm
51. e ignored after unit startup for a minimum of 1 minute To increase the delay to warn see 3 7 6 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 32 Operation 3 7 5 User Inputs Customer Inputs The user can connect and specify up to four inputs depending on unit configuration The user inputs customer inputs are digital inputs that influence the operating mode of the unit depending on the selection 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 7 along with their associated reaction 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
52. e such as room temperature and humidity temperature and humidity setpoints alarm status and settings event histories and the current time Figure 1 Liebert COM components Wall Mount Pesptes niu EM JE ot eat at ES RE EE Direct Panel Mount Liebert COM Input O Small Display and Bezel utput Board 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 flashing 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 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 p
53. e 4 of 5 Password PASSWORD W VSD Fanspeed FANSPEED W Auto Manual Economy HPM 30 100 VSD Setpoint STD VSD SET W non HPM 60 100 HPM 30 100 VSD Setpoint MIN VSD MIN W non HPM 60 100 HPM 30 100 VSD Setpoint Dehum VSD DEH W non HPM 60 100 HPM 30 100 VSD Setpoint No Power VSD NOP W non HPM 60 100 Page 5 of 5 Password PASSWORD W SCR Control Type CTRLTYPE W Tight Standard Economy Start Compressor 1 At CO1 ON W 150 to 100 Stop Compressor 1 At CO1 OFF W 200 to 50 Compressor 1 Stop Delay CO1 TD W 0 30 min Start Compressor 2 At CO2 ON W 150 to 100 Stop Compressor 2 At CO2 OFF W 200 to 50 Compressor 2 Stop Delay CO2 TD W 0 30 min Cycle Time CYCLET R 0 2 200 0 sec SCR Factor SCRFACT W 1 0 to 10 0 Actual SCR Request ACT SCR R 0 100 Unit Diary Large Display Only Shows all entered program changes and maintenance performed on the unit Table 24 Unit diary parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Text entered with ST N A R 3 COM Service Tool 57 Service Menu Parameters Table 25 Standby settings lead lag parameters Emotion Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Password PASSWORD W 0 31 Number of Standby Units STANDBY W autocorrects to number of connected units 1 No Daily Rotation Frequency RO
54. eating from 0 to 200 the first sin gle 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 compres sor activation and deactivation points can be adjusted in the Service menu under Setpoints Figure 20 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 20 Two single step compressors with SCR reheat set to Tight mode Temp Setpoint 70 F Proportional Band 8 F Deadband 0 F Cool 2 On SCR On Coolt On os oa s e o a o h nnr n AN I 200 100 I 0 I I 100 Heating _ Heating I Cooling Y Proportional Band Y Proportional Band Y Proportional Band SCR Reheat On 1 25 Operation 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 cool ing as described in 3 3
55. ec 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 8 POSSIBLE EVENT NOTIFICATIONS Table 9 lists alarms and warnings that may occur in a cooling unit When any of these occur they will appear on the Liebert COM Status menu and will be recorded in the Liebert COM Event log Table 9 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 WRN 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 36 Operation 3 9
56. er 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 counts the low pressure alarms happened between 2 service intervals Number of TH Alarms counts the thermal protection alarms happened between 2 service inter vals 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 38 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 COM 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 humidifica tion 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
57. ess 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 sub menu 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 6 and 7 show the Liebert iCOM control 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 Liebert iCOM Display Components and Functions 2 1 3 Entering a Password To change the value of a parameter in a menu you must first enter the password for that menu The User Service and Advanced menus each has a unique password to prevent unauthorized changes 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 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 k
58. essor with a suction cutoff unloader can only modulate its capacity between two distinct lev els fully loaded and half loaded A digital scroll compressor can modulate its capacity anywhere between 10 100 This variable capacity modulation allows cooling units to control 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 1s de energized the compressor capacity is 100 When the sole noid 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 15 Figure 15 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 16 When a com pressor is started the solenoid is energized
59. etpoints There is a parameter AutoSet Enable Service Menu Setpoints which automatically sets the propor tional bands for temperature and humidity and both the integration time factors according to the type of unit Chilled Water single or double compressor with influence of the selected Teamwork Mode See 4 1 Teamwork Modes for more on using this feature 17 Operation 3 3 2 Compressor Control Depending on the type of Liebert air conditioning unit you have your unit may contain one or two compressors with or without unloaders 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 propor tional band and stopped at 0 see Figure 12 Figure 12 One single step compressor without unloaders Temp Setpoint 70 F Proportional Band 8 F Cool 1 Deadband 2 F On I Cool 1 a Y Dead band i 72 73 74 BN 0 A E 100 Cooling Y Proportional Band Cooling Increasing Temperature Two Single Step Compressors Without Unloaders Two Step First single step compressor Cool 1 is started at 50 calculated output from the temperature propor tional band and stopped at 0 The second compressor Cool 2 starts at 100 and stops at 50 see Figure 13 One Compressor With an Unloader Two Step The two step compressor is started unloaded at 50 Cool 1 calculated output
60. ettings for non peak Small 8 Large operation Contains key contact information for local a Small amp Large service including names and phone numbers g Service Contact Info 10 Liebert COM Display Components and Functions Figure 9 Service menu icons SERUICE MENS EE HELLNESS SET ALARHS Peel ser i Ji s UF Service Menu password 5010 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 Unit Diary Shows all entered program changes and maintenance Large performed on the unit A Standby Settings Allows lead lag setup when multiple units are connected Small amp large hol Lead Lag _ Maintenance Allows setting maintenance interval reminder maintenance message number of unit starts and stops Small 8 large Wellness Settings and time since last maintenance WELLNESS Diagnostics Allows troubleshooting manual mode read analog and RARE Small amp large Service Mode digital inputs SERVICE SET Set Alarms Allows enable disable and settings for alarms Small amp large ALARMS Sensor Bs Calibration Setup Allows calibration of sensors Small 8 large NETWORK a Allows setup and U2U communication for multiple units Large Perl Options Setup Allows setup of component operati
61. ey 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 Figure 5 Menu tree Small display stand alone or networked Status Menu Unit 1 View Advanced Menu Password Password Password Setpoints Setpoints Factory Settings Event Log Standby Access Passwords Graphics Wellness Set Alarms Diagnostics Sensor Data Set Alarms Display Setup Calibration Total Run Hours Network Setup Sleep Mode Options Setup Service Info Service Info Active Alarms Liebert iCOM Display Components and Functions Figure 6 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 Service Menu Unit 1 Advanced Menu Unit 1 Password Password Password Setpoints Setpoints Factory 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
62. 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 13 Figure 13 Two single step compressors without unloaders or one compressor with an unloader two step Temp Setpoint 70 F Cool 2 Proportional Band 8 F On Deadband 2 F Cool 1 1 2 Dead band 70 a 7 72 7 74 ES I I 0 Caol 1 Cool 2 I 100 Cooling Off Off i Cooling 1 2 Proportional Band Increasing Temperature 18 Operation Two Compressors With Unloaders Four Step The first two step compressor is started unloaded at 33 calculated output from the temperature pro portional 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 14 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 14 Two compressors with unloaders four step Temp Setpoint 70 F Cool 3 ee Proportional Band 8 F Deadband 2 F Y Dead band I 0 i Cooling Off I I Increasing Temperature 19 Operation Digital Scroll Compressors A compr
63. g 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 off 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 O 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 14 Operation 3 1 5 Digital Scroll High Temperature A protective maximum operating compressor temperature limit is imposed on units with digital scroll compressor s with thermistor Once the digital scroll temperature reaches the maximum tempera ture threshold the compressor will be locked out for at least 30 minutes and an alarm will be annun ciated If after 30 minutes the temperature has cooled to a safe operating temperature the compressor will resume o
64. g business critical Technical Support Service continuity ensures network resiliency and adaptability through _ Web Site a family of technologies including Liebert power and cooling www liebert com Monitoring technologies that protect and support business critical systems Liebert solutions employ an adaptive architecture that responds ae Liebert monitoring emerson com to changes in criticality density and capacity Enterprises benefit Outside the US 614 841 6755 from greater IT system availability operational flexibility and Single Phase UPS reduced capital equipment and operating costs 800 222 5877 upstech emersonnetworkpower com Outside the US 614 841 6755 Three Phase UPS 800 543 2378 powertech emersonnetworkpower com 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 0499719111 While every precaution has been taken to ensure the accuracy gej and completeness of this literature Liebert Corporation assumes no Fax 39 049 584 257 responsibility and disclaims all liability for damages resulting from use of Asia this information or for any errors or omissions 7 F Dah Sing Financial Centre 2008 Liebert Corporation 108 Gloucester Road Wanchai All rights reserved throughout the world Specifications subject
65. h LPS does not open within a spec ified time the LLSV is turned On then back Off to try to unstick the LLSV The control will then wait a set period of time for the LPS to open This will happen three times If after three times the low suction pressure switch does not open the compressor and LLSV are locked off and an alarm Pump Down not completed will appear There is a re pump down if the LPS 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 LPS opened pump down will be continued for another half second with the control solenoid valve energized 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 cor recting the problem an alarm will occur and the affected compressor will be locked off If high head pressure alarm trips three times in a rollin
66. ic REHEAT LOCKOUT RL w Disabled Enabled HUMIDIFIER LOCKOUT HL W Disabled Enabled FC LOCKOUT FCL W Disabled Enabled COMPRESSOR S LOCKOUT CL W Disabled Enabled TYPE CUSTOMER INPUT 1 Cl W MSG WRN ALM CUSTOMER INPUT 2 Cl2 W MSG WRN ALM CUSTOMER INPUT 3 CI3 W MSG WRN ALM CUSTOMER INPUT 4 CI4 W MSG WRN ALM CALL SERVICE CS W MSG WRN ALM HIGH TEMPERATURE HTD W MSG WRN ALM LOSS OF AIR BLOWER 1 LB1 W MSG WRN ALM REHEAT LOCKOUT RL W MSG WRN ALM HUMIDIFIER LOCKOUT HL W MSG WRN ALM FC LOCKOUT FCL W MSG WRN ALM COMPRESSOR S LOCKOUT CL W MSG WRN ALM Page 7 of 7 PASSWORD W DELAY COMP 1 SHORT CYCLE SC1 W 0 9999 sec COMP 2 SHORT CYCLE SC2 W 0 9999 sec NO POWER NOP W 0 9999 sec CONDENSER 1 FAILURE CN1 W 0 9999 sec CONDENSER 2 FAILURE CN2 W 0 9999 sec ENABLE DISAB COMP 1 SHORT CYCLE SC1 W Disabled Enabled COMP 2 SHORT CYCLE SC2 W Disabled Enabled NO POWER NOP W Disabled Enabled CONDENSER 1 FAILURE CN1 W Disabled Enabled CONDENSER 2 FAILURE CN2 W Disabled Enabled 68 Service Menu Parameters SET ALARMS 3 Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metric TYPE COMP 1 SHORT CYCLE SC1 W MSG WRN ALM COMP 2 SHORT CYCLE SC2 W MSG WRN ALM NO POWER NOP W MSG WRN ALM CONDENSER 1 FAILURE CN1 W MSG WRN ALM CONDENSER 2 FAILURE CN2 W MSG WRN ALM
67. igh Humidity Hi Humi R 20 80 Hi Hu H R Daily High Humidity Hi Hu M Hi Hu S 52 User Menu Parameters ZA ACTIVE ALARMS A Table 17 Sensor data Function Read Range Large Display Small Display Write Imperial metric Daily Low Humidity Lo Humi R 20 80 Lo Hu H R Daily Low Humidity Lo Hu M Lo Hu S Active Alarms Permits viewing all current active alarms Table 18 Active alarms parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Active Alarms ACTIVE ALARMS Table 19 Display setup parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Language LANGUAGE W English Date YEAR MONTH DAY W Time HOUR MINUTE SECOND W hh mm ss Temperature Indication TEMP F C W C F Display Contrast CONTRAST W 0 100 Buzzer Frequency BUZ FREQ BUZ TEST W 0 100 Backlite Off After x Hours BACKLITE W 5min 10min 30min 1h 12h SCREEN Graphical Simple Screen W Graphical Comma Simple Comma Display Shows SHOWS W Set Act Act Set Display Colors DISPLAY W Normal Inverted mm dd yyyy Date Format DATE W dd mm yyyy yyyy mm dd 53 User Menu Parameters
68. in Fan Overload alarm is active the Loss of Airflow alarm is masked out Chilled Water Units with Variable Speed Motor VSD Fan Speed Auto or Manual VSD Fan Speed Control The parameter VSD Fan Speed Service Menu Setpoints allows the cooling unit s fan motor speed to be set for Auto operation when set to Auto the speed of the VSD variable speed drive motor follows the position of the chilled water valve based on predetermined logic for cooling and dehumidification operation Manual operation when set to Manual the speed of the VSD motor follows user input as set either locally at the cooling unit s Liebert COM display under VSD Setpoint in Service Menu Setpoints or remotely using Modbus BMS signal with an optional Liebert IntelliSlot 485 card VSD Setpoint VSD Fan Speed Setting If the VSD Fan Speed Control Service Menu Setpoints is set for Manual the VSD Fan Speed Set point 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 Intel liSlot 485 card which then transmits to the unit local control 13 Operation 3 1 3 General Com
69. in manual mode 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 setting the analog output 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 main tain system pressures for a maximum time of 10 minutes by following the auto control algorythm 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 Service Offset Changing System Pressure Settings The MBV control is set to maintain a system pressure specific to the partic
70. ing Control Types The Liebert COM control has three humidity sensor control types Relative Compensated and Pre dictive 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 The 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 reading 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 requireme
71. ional 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 NOTE In Teamwork 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 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 avallable 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 co
72. ip 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 control has four Temperature and Humidity Control Types Proportional PI and Intelligent Each control type affects the timing and intensity of the cooling heating and humidify ing dehumidifying operations The Control Type parameter is in the Service menu under Setpoints Proportional If Proportional Control is selected the percent cooling heating requirement is deter mined by the difference between the return air temperature sensor reading and the temperature set point As the return air temperature rises above the temperature setpoint the percent cooling required increases proportionally from 0 to 100 over half the programmable temperature propor tional band See 3 3 1 Temperature Proportional Band The percent heating requirement 0 to 100 is determined the same way when the return air temperature falls below the setpoint The humidifying dehumidifying operations are controlled in the same manner as the cooling heating oper ations however the humidity sensors setpoints and proportional bands are utilized The Propor tional control type is commonly selected on compress
73. it hanging the display 6 Connect the power and Ethernet cables to the display circuit board the board is marked 7 Attach the front of the display to the mounted rear panel of the assembly unit snaps together 49 Mounting a Large Display on a Wall Figure 31 Liebert iCOM display dimensions AC Adapter Plug 120V 60Hz 12VDC 10ft 3048mm routed through wall to back of display housing provided by Liebert FRONT VIEW SIDE VIEW U2U CAT5 Cable 150ft 45 7m maximum to be field supplied and field connected to switch or hub 12VDC Pwr SW U2U P64 1 92 4 17 Primary Mounting Method er 3 14 80mm 4 13 105mm 5 2 132mm BACK VIEW DPNO00800a Rev 0 50 User Menu Parameters 7 0 USER MENU PARAMETERS User menus report general cooling unit operations and status The password for the user menu is 1490 The COM control firmware is being updated constantly As a result the User menu parameter tables 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 COM User manual updates Table 12 Setpoints parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 1 Password PASSWORD W Temperature Setpoint TEMP SET W 41 104 F 5 40 C 20 80 Humidity Setpoint HUM SET W settings lower than 19
74. itch 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 See 6 0 Mounting a Large Display on a Wall for mounting details and Figure 31 for wall mount dimensions 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 Installing a Liebert COM Unit to Unit Network Figure 25 Wiring a small display for stand alone operation Small Graphics Display On Unit Accent Stand Alone Unit 6 Wire Cable SA et bis pes i x EA 8 8 pes z COM E Microprocessor and I O Board EJ le H P54 TBI peze paz EEE Pis pz psr Pa poocooun titt 182964 Page 1 Unit Electronics Compartment Rev 0 Small Graphics Display On Unit Accent Unit to Unit Communications With More Than Two Units 6 Wire Cable z ua J T T T T P18 P65 8 Pee y LJ EE 1 Straight Through E Ethernet Cable 5 COM z Connection to P64 k 3 Microprocessor and l O Board E H Psa Bi ia Paz JP Essl pss Paz Pt Pa 0000000 ttt Networking Switch
75. lay Write Imperial metric Page 1 of 1 Password PASSWORD W Return Sensor Alarms RTN SNSR W Enabled Disabled High Return Temperature HI TEMP W 34 210 F 1 99 C Low Return Temperature LO TEMP W 34 210 F 1 99 C High Return Humidity HI HUM W 1 99 Low Return Humidity LOW HUM W 1 99 Sensor A Alarms SENSOR A W Enabled Disabled High Temperature Sensor A HI TEMP A W 34 210 F 1 99 C Low Temperature Sensor A LO TEMP A W 34 210 F 1 99 C High Humidity Sensor A HI HUM A W 1 99 Low Humidity Sensor A LO HUM A W 1 99 Table 17 Sensor data Function Read Range Large Display Small Display Write Imperial metric Page 1 of 2 Optional Sensor A Temperature TEMP A R 32 122 F 0 50 C Optional Sensor A Humidity HUM A R 20 80 Optional Sensor B Temperature TEMP B R 32 122 F 0 50 C Optional Sensor B Humidity HUM B R 20 80 Optional Sensor C Temperature TEMP C R 32 122 F 0 50 C Optional Sensor C Humidity HUM C R 20 80 Freecooling Fluid Temperature FC TEMP R 4 113 F 15 to 45 C Outdoor Temperature AMB TEMP R 4 113 F 15 to 45 C Freecooling Status FC STATE R Off Start On Blank DigiScroll 1 Temperature DS1 TEMP R 84 313 F 29 156 C DigiScroll 2 Temperature DS2 TEMP R 84 313 F 29 156 C Page 2 of 2 Daily High Temperature Hi Temp R 32 122 F 0 50 C Hi Te H R Daily High Temperature Hi Te M Hi Te S Daily Low Temperature Lo Temp R 32 122 F 0 50 C Lo Te H R Daily Low Temperature Lo Te M Lo TeS Daily H
76. nally as the requirement for cooling rises from 0 to 100 If more than 100 cooling is required then the compressors are activated at 150 and 200 respectively 133 163 180 and 200 for a four step system If full GLYCOOL capacity is not available then the GLY COOL 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 full open at 60 cooling requirement and the compressors would activate at 110 and 160 cooling requirement In order 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 tem perature 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 con tinue 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 temperature control will operate the compressors in the same manner as a two step or four step system without GLYCOOL Dual Cooling Source If dual cooling is available the sensible cooling system operates in the same ma
77. ndard maintenance interval 12 months six months or three months and adjusts that based on its calculation of compo nents wellness To calculate wellness Liebert COM keeps a running total of component working hours and the num ber of times it has been started Liebert COM relates that data to the optimum maximum starts per hour Accordingly Liebert COM will increase or decrease the time before the next service call will be needed 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 COM 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 COM recalculates wellness It begins with the pre alarm maintenance time and factors in the alarm 37 Operation Parameters for Next Maintenance Calculation General Maintenance Settings Maintenance Frequency can be set as one to 12 months or to zero which disables mainte nance 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 1f some compo nents run in non optimum way
78. nfiguration 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 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 3 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 41 Installing a Liebert COM Unit to Unit Network 5 0 INSTALLING A LIEBERT ICOM UNIT TO UNIT NETWORK 5 1 5 2 Connecting multiple Liebert COM controlled cooling units in an Ethernet Unit to Unit U2U net work enables the units to work together to achieve efficient
79. ng 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 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 will also need to be configured to utilize the terminals NOTE Liebert SiteScan will be limited to legacy parameters when communicating via terminals 77 and 78 Mounting a Large Display on a Wall 6 0 MOUNTING A LARGE DISPLAY ON A WALL 6 0 1 Location Considerations Consider these factors before beginning work on a wall mount installation Power supply Liebert COM requires an electricity source A factory supplied 120VAC trans former connects to the back of the large display Availability of communication cable CAT5 Ethernet cable connection on the back of the large display Distance from network switch maximum of 328 feet 100m Accessible location for personnel Necessary Mounting Items 10 pan head type screws or bolts quantity 2 field supplied Wall anchors sized for 10 pan head type screws or bolts quantity 2 field supplied if mounting on drywall or similar surface Mounting Instructions 1 See Figure 31 for dimensions and mounting arrangements Mark the wall where screws or bolts will be inserte
80. ng 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 in 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 required Figure 10 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 there is a loss of power to the cooling unit and power comes back the unit will return to its pre vious operating status on if it was on before the power off off if it was off When power returns the autorestart time time selectable Single Unit Auto Restart Service Menu Options Setup controls the start of the unit The autorestart time runs in a loop starting the next unit each time when elapsed starting with Unit 1
81. nner 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 con trolled by the Temperature Proportional Band explained in 3 3 1 Temperature Proportional Band Three Stage Electric Hot Gas and Hot Water Reheat 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 19 Your unit will have one of the nine reheat config uration types shown in Table 4 Table 4 Reheat configuration types Type A B c D E F G H I Stage 2 Electric 2 Electric 2 Electric 1 Electric 1 Electric 1 Electric 1 Stage 3 Electric 3 Electric 2 Electric 2 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 23 Operation Figure 19 Three stage heating Temp Setpoint 70 F Proportional Band 8 F Deadband 2 F Heat 3 On Heat 2 On Heat 1 On Y Dead band 0 Heat 3 Heat2 Heht1 Heating Off Off Qff 0 Y Prop
82. nt 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 auto matically 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 Tem perature 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 every 1 C deviation from the temperature setpoint the humidity sensor reading is changed by 3 RH directly propor tional 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 ret
83. ode 1 with two cooling UNItS eee eens Connecting two cooling units each with a small display using a crossover Ethernet cable Wiring a small display for stand alone operation 0 00 ccc ce eee ees Wiring a small display for U2U network operation 000 00 ccc eens Wiring a large display for stand alone Operation Wiring a large display for U2U network operation 0 0 0 00 eens Liebert iCOM input output control board Liebert vNSA with optional remote large display ooo Liebert iCOM display dimensions 0 00 cc cence cee eens iii Table 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 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 TABLES Keyboard icons and functions 3 User MENU ICONS 205 5 hee os gue a BW E A De ea 9 Service MENU ICONS sr oleae eel has wea a Boe Dd al ae woe A ed A ee P oty da 11 Reheat configuration types 23 Parameters for infrared humidifier control 0 0 0 0 000 cc ooo 28 Dehumidification With Comp settings 29 Customernin puts otr ita ie ete ead 33 Possible event settings some events not available in all units 0 0 00 eee eee 35 Event notifications large or small display ooo o
84. omagnetic inter ference 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 8 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 47 for details 42 Installing a Liebert COM 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 COM U2U Ethernet Network The Liebert COM U2U network must be isolated from other network traffic The network switch es that connect Liebert COM controls need to be dedicated to supporting only Liebert COM communi cation The U2U network cannot be connected to the building or IT network If network communica tion is ever lost failed network switch etc all Liebert COM controlled cooling units will
85. on the one that has been operating longer since the last start 1s the next to be stopped NOTE The Auto setting attempts to maintain equal run times between compressors 15 Operation 3 2 3 2 1 3 2 2 Motorized Ball Valve in Digital Scroll Units On digital scroll units discharge pressure is controlled by a motorized ball valve During unloaded operation pressure changes during each digital cycle could cause a pressure controlled water regulat ing valve to open and close an excessive number of times The motorized ball valve is designed to maintain a consistent peak discharge pressure on Water Gly col Cooled Digital Compressor Systems 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 control board based on 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 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 COM control only when the system 1s
86. on Small amp large Lm Service Contact Info Contains key contact information for local service Small amp large including names and phone numbers 11 Operation 3 0 OPERATION The Liebert COM display for your Liebert cooling unit features an easy to use menu driven liquid crystal display LCD 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 3 1 Single Unit Functions 3 1 1 Unit Fan Control Start Stop Unit on means the fan output is activated The unit can be switched On and Off from two inputs 1 Remote on off input 2 Display button Pressing the On Off key on a small display will control only the cooling unit it is connected to regard less of whether the cooling unit is a stand alone unit or part of a network Pressi
87. orized 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 return air tempera ture humidity has been above or below the setpoint If the actual return air temperature humidity is above the setpoint the percent requirement is slowly but continuously increased until the total is suf ficient 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 7 2 Intelligent If Intelligent Control is selected the return 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 These rules simulate 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 return 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 7 2 Humidity Sensor Reading Control Types Humidity Sensor Read
88. ortional Band Decreasing Temperature 100 l 66 66 67 les 70 Heating 24 Operation 3 5 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 Set points Tight Mode In Tight mode the compressors and reheats are operated at the same time to provide maximum tem perature 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 cooling 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 h
89. peration 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 Setting the counter back to O 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 Units With Two Compressors To help maximize the life of your compressor s there is a start to next start delay for each single compressor A Minimum ON time and a Minimum Off time may be selected in the Advanced menu minimum three minutes for single phase compressors Consult the factory on how to modify the Minimum ON and OFF time settings Compressor Sequencing 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 operati
90. play Components and Functions 2 1 2 1 1 Navigating Through the Liebert COM Menus Liebert COM shows icons and text for monitoring and controlling your Liebert cooling units or net work 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 COM control 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 mode 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 informa tion Any large display that is connected to a network can be used to view any cooling unit on the net work or show an average view of the entire system of cooling units The Liebert COM control has three main menus User Service and Advanced The User menu contains the most frequently used features settings and status information The Ser vice menu contains settings and features used to set up unit communications and for unit mainte nance The Advanced menu contains settings used to set up the unit at the factory
91. points 27 Operation 3 6 1 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 Infrared humidifiers are started at 100 humidification request and stopped at 0 Infrared humid ifiers cannot be driven in proportional mode Table 5 Parameters for infrared humidifier control Parameter IFS Default IFL Default Humidity in Last xx Hours 15 hours 15 hours Prefill Time 30 seconds 60 seconds Fill Time 4 minutes 7 minutes Humidifier On Time 8 or 10 minutes 10 minutes Flush Rate 150 150 An autoflush system automatically controls a water makeup valve to maintain proper levels in the infrared humidifier 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 peri odically to add water to the pan abo
92. pressor 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 and to 0 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 switch input is enabled only if the compressor is 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 The Pump Down operation is performed to protect 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 a compressor is turned Off and the low pressure switch is closed pressure OK the com pressor will be operated with the LLSV liquid line solenoid valve closed de energized until the low pressure switch opens low pressure condition without giving alarm When there is a call to turn off a compressor the LLSV is closed If the low suction pressure switc
93. rge Display Small Display Write Imperial metric Compressor1 Settings Page 3 of 8 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of HP Alarms HP AL W 0 32000 Number of LP Alarms LP AL W 0 32000 Number of OL Alarms OL AL W 0 32000 Number of DS HT Alarms DS HT AL W 0 32000 Actual Bonus BONUS R 0 12 Compressor2 Settings Page 4 of 8 WELLNESS COMP2 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of HP Alarms HP AL W 0 32000 Number of LP Alarms LP AL W 0 32000 Number of OL Alarms OL AL W 0 32000 Number of DS HT Alarms DS HT AL W 0 32000 Actual Bonus BONUS R 0 12 El Heater 1 Settings Page 5 of 8 WELLNESS HEAT1 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of Alarms ALARMS W 0 32000 Actual Bonus BONUS R 0 12 59 Service Menu Parameters WELLNESS Table 26 Maintenance wellness settings parameters continued Function Read Range Large Display Small Displa
94. st 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 3 1 Temperature Proportional Band The 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 39 Teamwork 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 23 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 read ings 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
95. tion When a low limit is reached a compressor or the liquid cooling source that is used for dehumidification is dis abled 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 com pressor 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 also 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 Low Limit Value 7 F Deactivation Temperature 62 F 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 5 Temperature Control Reheat Dehumidification Compressor Quantity Under Factory Settings in the Advanced menu there is an item called Dehumidification With Comp This item will be set to either 1 2
96. ular 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 or decrease the operating compressor discharge pressure by changing the targeted range of control The discharge pressure is the peak pressure of the digital cycle 16 Operation 3 3 3 3 1 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 cool ing heating and how intensely to perform it The Temperature Proportional Band is a user defined range that is divided into two equal parts for cooling and heating The Temperature Setpoint is 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 11 illustrates how the temperature proportional band is evenly divided on either side of the temperature setpoint with and without a deadband Figure 11 Temperature proportional band Without Deadband m sh 100 lt Proportional Band gt Proportional Band 0 4 Proportional Band i Proportional Band 100 o gt i Heating a sd Temp Temp With Deadband
97. urns 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 mini mizing 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 3 7 3 3 7 4 Supply Limit Optional Chilled water units may be ordered with an additional sensor for monitoring the supply air tempera ture This sensor maintains the minimum air temperature under a raised floor to help prevent con densation from forming 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 values The control compares the deviation from the return air setpoint and the supply limit setpoint and cal culates the output to the actuator from the smaller deviation NOTE The Supply Limit is calculated on each unit independent of the other sensor readings on the network High and Low Temperature and Humidity Events High and low temperature and humidity alarms can be set for both the internal and optional exter nal sensors If a sensor reading exceeds a preset threshold a warning will appear These warnings ar
98. ut 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 Humidifier 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 28 Operation 3 6 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 dehumidifica
99. word PASSWORD W Return Sensor Alarms RTN SNSR W Disabled Enabled High Return Temperature HI TEMP W 34 210 F 1 99 C Low Return Temperature LO TEMP W 34 210 F 1 99 C High Return Humidity HI HUM W 1 99 Low Return Humidity LOW HUM W 1 99 Sensor A Alarms SENSOR A W Disabled Enabled High Temperature Sensor A HI TEMPA W 34 210 F 1 99 C Low Temperature Sensor A LO TEMPA W 34 210 F 1 99 C High Humidity Sensor A HI HUM A W 1 99 Low Humidity Sensor A LO HUM A W 1 99 63 Service Menu Parameters Table 28 Set alarms parameters continued Function Read Range Large Display Small Display Write Imperial metric Page 2 of 7 Password PASSWORD W CUST IN1 W Smoke Water Alarm C PMP Alarm Flow Alarm Stdby G Pmp Stdby Unit C Input 1 C Input 2 C Input 3 C Input 4 Rht Lockout Hum Lockout Rht Hum Lock Comp Lockout Call Service Customer Input 1 High Temp FC Lockout Air Loss Heater Alarm Flow AL SD Flow AL LC Comp Lock PD Enable FC HTRJ VFD HTRJ TVSS Fire Alarm 2nd Setpoint No Power LSI Cond 1 Fail Cond 2 Fail Customer Input 1 active when C2 ACT W Open Closed Customer Input 2 CUST IN2 W Like Custom 2 Customer Input 2 active when C2 ACT W Closed Open Customer Input 3 CUST IN3 W Like Custom 2 Customer Input 3 active when C3 ACT W Closed Open Customer Input 4 CUST IN4 W Like Custom 2 Customer Input 4 active when C4 ACT W Closed Open
100. xchanged Open becomes Close and Close becomes Open Any time the unit receives the Power On signal the valve performs a 3P Reset the Close command is given continuously for a time of 110 of the 3P actuator run time This calibrates the valve or damper 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 During normal operation the 3P actuator is driven in steps After start of control unit on or free cool ing glycol cooling is enabled the 3P actuator moves without stepping to the requested position after that the stepping starts Figure 17 Three point actuator control example cooling 3 4 3 4 1 100 3P Fully Open Requested 3P Position 0 3P 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 set tings DT Between Room FC Type Service Menu Setpoints
101. y Write Imperial metric El Heater 2 Settings Page 6 of 8 WELLNESS HEAT2 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of Alarms ALARMS W 0 32000 Actual Bonus BONUS R 0 12 El Heater 3 Settings Page 7 of 8 WELLNESS HEAT2 Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of Alarms ALARMS W 0 32000 Actual Bonus BONUS R 0 12 Humidifier Settings Page 8 of 8 WELLNESS HUM Password PASSWORD W Number of Starts STARTS W 0 32000 Run Hours RUN HRS W 0 32000 Average Run Time AVG RUN W 0 999 min Starts per Day Best BEST W 1 240 Starts per Day Worst WORST W 1 240 Number of Alarms ALARMS W 0 32000 Actual Bonus BONUS W 0 12 60 Service Menu Parameters SERVIC Table 27 Diagnostics service mode parameters Function Read Range Large Display Small Display Write Imperial metric Page 1 of 7 Password PASSWORD W HP 1 Alarm Code HP1 CODE W 0 999 HP 2 Alarm Code HP2 CODE W 0 999 HT 1 Alarm Counter HT1 CNT W 0 999 HT 2 Alarm Counter HT2 CNT W 0 999 LP 1 Alarm Code LP 1 CODE W 0 999 LP 2 Alarm Code LP2 CODE W 0

Emerson Liebert iCOM User's Manual

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