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Liebert RAC2-8 User's Manual

1. b LINN dos 29028 OF LINN Sobel NO 9 zun 276 205 1 UNA s Lu 23 1 1 5 1 0 Wav NOWWOS No NMOOLNHS 430 ONINNNY NIYW3Y 8 1 5 193135 ASNYIS 0311 3 819521 j829 Sv 2 T LI AU 193135 JOON 3un v3 YIMO4 NO GAVE 0052 330 anva 0021 1 ZMS 193135 31Y8 Onv8 W300W MS E o NO 3N 1 035437 zov aa 330 dn Wwig 2 205 01123135 NO 03193NN02 430 0310302510 8 ZMS 11 8 WYH XO0 1 Tm E SIOVINOO 510 1 02 no 0343804 Aug IVA bz E NO SlIN 77 NO 39404 330 NOILVH3dO TWAYON SMS 123136 512 1 02 NOWNOD HOJAS 3QIBUJAO EO 00000000 Ol foo Uso Dos 005 IDDIDDIDIDIDD p je ea e e 000050000 Ig Mo Moo Bo Mo 0 056430030000 824 39V 383 1NI y3sn Figure 5 4 RAC2 8 Switch and Jumper Settings 42 User Manual 9 97
2. SINdINO 105102 u3MOd 181 SION 335 NVISBUS o JLON 335 BOSNIS nnH dH31 390 NOI 1VM3JJO BIMOS AJN32U3r Z A Woy iv 1809307 W3AO0d AMVENWX NOWNOD 103907 AJIQIANH TYNOH dO Figure 5 3 RAC2 8 Connection Diagram Liebert RAC2 8 41 Installation Section 5 L6 TEIL penss 1 1 ON BhSbSI 335 SNOLLOJNNOO IVIIBLIITA 80472 6ESbSI 335 INJWN3ONYHNV IN3NOdWOO HOS 2 BESbSE 33S SNOISNINIO 3HNSONONI 80371 3SN3S 38150712 12 1 02 22 35835 JOVLIOA SA 8 LINA DAS L LINN 22 9 LINN S EMS 32 b HNA MNA 285 32 S 2 LINA T TAS 22 SA SALON NO _ 0096 330 008 330 NO anya 2092 330 340 0021 2 16 1 5 123135 aivy GAVE NO NO ELA No 330 dnd 330 NO ay 330 330 Linn b IMS IAS ST38Y1 021 No 035012 WYON a 330 N3dO MJA S IMS SAYS LIN NO 4015 31038 TMS 440 HIMOS AINZONINA 9 14S 01140 83004 AONSOUJAS p 1 193135 ANdNt NONHOS 039837145 SI N3HM S3ZIOUJN3 30 98V370 Wuviv VINN 837194383 SNIVW3H 8 Soto pe L motel 9 dolo q 2 m S
3. S STBY R RUN S ZONE 04 S S STBY R RUN S ZONE 06 5 S STBY R RUN S ZONE 4 07 R 08 S S STBY R RUN 0 Liebert RAC2 8 e 5 Section 3 Operation Sequencing Status Screens cont d xx is the number of alarms recorded since alarm history was last cleared See Alarm submenu These functions cannot both be ON at the same time Select the function required for your installation Password Screen Main Menu Status Sub menu 6 User Manual 9 97 AUTO SEQUENCING ON DAY 06 OF 15 00 00 TEMP STAGING OFF Each screen is automatically displayed for 3 seconds To control the display of the status screens you can press the Hold Sequence button to hold a screen and to manually step through the screens Press C to resume automatic sequencing The system returns to the Sequencing Status Screens if no control keys have been pressed during a two minute period If alarms are present the last line of the first screen displayed above reads ALARMS PRESENT xx Alarm screens are displayed next in the status sequence Up to 20 alarms can be displayed 5 screens of 4 alarms each Alarms are stored in a First In First Out FIFO sequence Select either Auto Sequencing or Standby Testing from the Set Options Sub menu If the Password function is enabled you must enter the valid password to access the RAC2 8 Main Menu At the Enter Password screen type the established passwo
4. Liebert ENVIRONMENTAL CONTROL Auto Changeover Controller TABLE OF CONTENTS SECTION 1 INTRODUCTION SECTION 2 STARTUP sc eite SS 3 SECTION 3 OPERATION ia insista ad dd 5 Local asse 5 Sequencing Status Screens He HY poa pa ar 5 Password cscccsccccssscesscecssecescecssecescsecsaecesseecssecesesecsueceseeecsaecsesecssecesesecssecseeeecaaecesueesessecessesesaecseesesaeeesees 6 huEnmurn 6 Status ee ES MERERI 6 Set Options SUD Me ii Renee re ear TR e o HERE ENTER E 8 IN 13 Set Clock SUD in 14 Override 14 16 Mel eet E RO ONDA AE DR O 16 Statis 17 Setup Zones Units OptionS ses aieo aio 18 Alarms Review and Alarms Clear esses eene nennen enne eterne et nennen nn 21 NHINOlhdcmm 21 Overnde A Unit MTS 22 Set Modem iei A ss 23 Setup Temp Humid Opus EUER aeee 24 Setup Standby Unit Options cccscsessssscssscssecsnecsnsconssnsssnsesssessssssessesecssscessoesensseessoessesesnsesnsesnssenesensees 25 Display SS Alarm Block ccccecscsscesscesscesecsecsnecaeecaeeeseeeneeecesecueessesreeseceeecaecsaecaecaeecaeseaeeseeeeeeneeaees 26 Set New P
5. The Site ID is included in alarm messages dialed out by the modem Assign the Site ID from the terminal A Liebert site monitoring system The RAC2 8 sends information to SiteScan if a system is connected to the EIA 422 port When Standby Testing is ON the RAC2 8 periodically starts the Standby unit s to test operation The time between these tests is the Interval Standby Testing ON OFF Interval in days and time of day for testing are user selected from the display Standby Testing and Autosequencing cannot both be ON at the same time Each time a test is performed the Standby unit s operate for a time equal to the Hold Delay plus the Alarm Delay At the end of this period operation returns to the Running unit s If an alarm occurs and does not correct itself by the end of the test time an alarm is displayed and annunciated The units selected to be OFF during an operating mode Select Standby units from the display Units not selected for Standby status are given Section 4 Glossary of Control Functions Temperature Alarms Temperature Sensitivity Temperature Staging Terminal Units Running status Standby units can be turned ON by Autochangeover Autosequencing or Standby Testing Temperature alarms are caused when the temperature detected by the remote sensor in Zone 1 exceeds the programmed High or Low trip point Trip points are selected in 1 degree increments from the display Entering 00 disables an alarm
6. lt D gt RV4 R5 m 708 C5 yellow lt gt CR7 lt _ gt RV5 pep 1 P1 ee TB1 Installation Section 5 L6 TEIL penss 8ESPST ON BM 2 S3HONI Ni NMOHS SNOISNINIQ S Ox PEI Sai SZ XO8 JO 1H913M b 51 335 SONIILI3S YIAWAF HOLIMS 80476 ObSbSI 335 SNOILIINNOI 1 21819313 40474 689151 335 LIN3W3ONVHUY INJNOdWOO 803 1 SALON ge st Erti be 2 gp 1 99v gest PSESE I vT Te zvv 2 9 05121 1075 iagram 1 Enclosure D imensiona Figure 5 1 RAC2 8 D 0 Liebert RAC2 8 e 39 Installation Section 5 L6 TE L penss 6 ON BM Z W300W WONJ 01123 02 262 55 Z wNmal NOILO3NNOO 2 Z SY 371810NV IbSPST 335 5901135 YIANNP HOLIMS YOJ E 095951 335 SNOIIO3NNOO 1991810373 40372 BESPST 335 SNOISN3MIQ 380507283 80371 SILON AION 1VNINH3I YIMOS E E yal Wd 148 13 om 3 E 0 DT e g HOLIMS 330 NO SE go MAVING INIHI HIMOS NIVA EET Ep g U 2I BD E go mag i og YBNYOISNVYL IVA bz oB amp 8 o t oo AlddNS YAMOd JOAS Q3AON3H dOL
7. NMOHS JYNSOTONA SIINON1IINI 1 40 3504 ABSZ Z 1 20 4 ISNA AOS ANY 1 JIV IYILNI yasn Figure 5 2 RAC2 8 Component Arrangement 40 User Manual 9 97 Installation Section 5 L6 TE L penss 0 1 ON 440 H3MOg AIN3I83N3 HOLIMS 310N3H SIIn3Ul3 2 55772 SIIMOYID JOUINOO NY TS 13 8 22OVH TAGON Ni Phe 20138 uo 013 5 N30138 ONINN IIS 03119905 07283 0317845 0133 DAY 22 30vO OMY 22 0315181 J70NIS ALIQIANH ONY IBNLVHISNIL HOLVELNIONOO VIVO BO U3X3 d LINA NI Zbb s 30138 uo 1956 820139 GNSNNOISY NOILVU3JO BIMOS AINIIHIAI HOLIMS JLOWSY SHOSN3S NV2S31IS osas 22 53 LH 11 V2 WwNINH3I NOILIINNOS 292 59 d W300N 4083 NOI193NNOO 222 514 B B 2 W3OON NOLLJ3NNOO 222 l 582825 37872 ZH 09 05 IVA 952 1 JivldM9v8 Ol 5073195 37870 I123NNOO b ERFAN 300 ATSLVYVd3S O3svHOuhg YO 03178915 07304 b rsi 335 SONILI3S HOLIMS BOI E H 09 IVA Bel 34v SNIT O3HSVO 3015100 5321 30 310N B SpS1 33S INJM3ONYUNY INJNOJdWOO BOI 2 8 5 51 335 SNOISN3AIQ 380807283 7 SALON Y3MOd e ke sens 8 LINO SIMANI FOJY TY NOWNOD wom HNA
8. gt gt FOR Set Number of Units screen will be iterated for each zone selected up to 4 The RAC2 8 then displays the Set Status screen for Zone 1 SET STATUS ZONE 1 01 R 02 S 1 RUN O STBY Set Status screen is iterated for each zone selected Press 1 or 0 to set the status After you have selected the operating status of units in your last zone Press E to return to the Set Units Menu From the Set Units menu press 2 EMER OP to display the Set Emergency Operating Units ON screen UNITS ON 0 04 R 0 08 0 E NEXT Beginning with unit 01 set each unit s emergency operating status Press E to continue to the next unit When you have configured the last unit the RAC2 8 returns to the Set Units menu From the Set Units menu press 3 LABELS to display the Assign Labels to Unit screen ASSIGN LABEL TO 1 01 2 02 3 03 4 5 05 6 06 7 07 8 PUSH ENTER FOR N Beginning with unit 01 assign a label to each unit You can use two numbers two letters or a two character number letter label Press E to continue to the next unit When you have configured the last unit the RAC2 8 returns to the Set Units menu 0 Liebert RAC2 8 e 9 SECTION 4 GLOSSARY OF CONTROL FUNCTIONS includes a functional description of each delay Set Options Sub menu cont d 10 User Manual 9 97 Section 3 Operati
9. 0 Liebert RAC2 8 e 31 Humidity Alarms Humidity Lockout Inactive Unit Interval Labels Manual Override Modem 32 User Manual 9 97 Section 4 Glossary of Control Functions Humidity alarms are caused when the humidity detected by the remote sensor in Zone 1 exceeds the programmed High or Low trip point Trip points are selected in 1 RH increments from the display Entering 00 disables an alarm A Humidity Alarm activates the Common Alarm output High Range up to 80 RH Low Range down to 20 RH A Form C contact labeled Humidity Lockout is energized when a humidity reading exceeds a lockout trip point The relay 1s de energized when humidity drops to 2 RH below the High Humidity Trip point or when humidity rises to 2 RH above the Low Humidity Trip point To use this contact for a single control function increase or decrease humidity disable one of the Humidity Alarms An inactive unit is one that is not programmed to the RAC2 8 system This appears in an error message if you try to Override a unit that the system does not recognize The Interval is the time period in days used to program the Autosequencing and Standby Testing functions The interval is user selected from the display Range 0 to 99 days Each unit may be labeled with a 2 digit number from 01 to 99 If you prefer something other than 01 through 08 unit labels can be selected from the display A switch located inside the RAC2 8 en
10. 8 e 17 Section 3 Operation Setup Zones Units Options Press 2 from the Main Menu to display the Set Options menu The following screens show the terminal display that enables you to configure the Options menu items NUMBER OF ZONES NUMBER OF UNITS PER ZONE RAC2 8 MAIN M ET OPTIONS MENU Set Number of Zones Set Number of Units per Zone Set Unit Status Set Emergency Power Units Set Unit Shutdown on Alarm Set Unit Labels Set Alarm Delay Hold Delay Restart Delay EXIT IO UE MBER OF ZONES 1 NUMBER 1 4 ESC to quit gt 2 MBER OF ZONES 2 BER 1 4 ESC to quit gt ENU R OF UNITS P NITS NITS ROGRAMMED ROGRAMMED 1 2 ESC to quit 2 UNITS BER 2 8 ESC to quit gt 2 EJ Dd DE Dd Dd Du CO R UNITS PER ZONE NITS NITS ROGRAMME ROGRAMME 1 2 D D Ld Ed Dd Ed Dd CO ESC to quit gt Setup Zones Units Options cont d Configure the number of zones and number of units as desired UNIT STATUS SET OPTIONS MENU SET UNIT STATUS UNIT LABEL ZONE STATUS 1 01 1 RUNNING 18 User Manual 9 97 Section 3 Operation RUNNINE STANDBY RUNNING STANDBY UNP ROGRAMMED UNP ROGR
11. 8 largest room the temperature and humidity can be monitored The with Liebert mini MATE mini MATE common alarm output from each unit is monitored and annunciated by Plus and DataMate environmental the RAC2 8 Up to 20 system alarms can be stored with time and date control systems stamp All alarms are latching and must be manually cleared The most important control functions are Autochangeover Autosequencing and Standby Testing Each unit can be assigned a Running or Standby status Autochangeover turns on a Standby unit if a Running unit in the same zone has an alarm The Running unit with alarm will be turned off if that control option is selected Each unit will return to its previous status when the alarm is manually cleared Autosequencing balances unit run times by changing Standby units to Running and Running units to Standby at programmed time intervals Standby Testing turns on Standby units at programmed intervals to test their operation Note that Autosequencing and Standby Testing cannot both be selected at the same time Other control functions include Manual Override Emergency Power Operation Power Failure Mode Password and Programmable Delays Refer to SECTION 4 GLOSSARY OF CONTROL FUNCTIONS for more details System outputs include Humidity Lockout Relay Optional Control Lockout Relay and Common Alarm Communication ports are EIA 232 for terminal or printer a modem port and a proprietary EIA 422 port
12. C to configure degrees in Fahrenheit or Celsius SELECT F C F 0 Liebert RAC2 8 e 11 Set Options Sub menu cont d 12 User Manual 9 97 Section 3 Operation From the T H menu press 4 LOCK to configure the optional Humidity Lockout feature UMIDITY LOCKOUT ET gt 00 LOW gt 00 RANGE 20 80 00 0FF E NEXT C RETURN Refer to SECTION 4 GLOSSARY OF CONTROL FUNCTIONS for details on the Humidity Lockout feature 4 STANDBY From the Set Options Sub menu press 4 STANDBY to display the Standby Options menu DBY OPTIONS M O SEQUENCE TO STANDBY URN From the Standby Options menu select Auto Sequencing Standby Testing or neither These functions cannot both be active ON at the same time Select the desired function If you select 1 AUTO SEQUENCE UNIT you must also configure a schedule for your installation ENCING ON 9 XX DAYS 5 PASSWORD From the Set Options Sub menu press 5 PASSWORD to display the Set Password menu PASSWORD M EW PASSWOR ETURN The Password function provides security to the RAC2 8 so that only authorized personnel can make Setup changes to the system Section 3 Operation Set Options Sub menu cont d Alarm Sub menu Press 1 NEW PASSWORD to set a new four digit password for the system then follow the instruction on the screens ER NEW
13. PASSWORD EN PUSH ENTER H CLEAR TO R Enter 0000 to disable the Password function CONFIRM NEW PASSWORD gt THEN PUSH ENTER When you have finished configuring the Password Press E to return to the Main Menu From the Main Menu press 3 ALARMS to display the Alarm Sub menu Press 1 to review all alarms The RAC2 8 can store up to 20 alarms in the alarm memory buffer in a First In First Out FIFO sequence For each alarm the review screen displays the alarm number total number of alarms date and time stamp and the alarm message ALARM 01 05 ZON 8 07 15 96 15 2 UNIT XX COMMON ALARM PUSH ENTER FOR NEXT NO ALAR ESE PUSH CLEAR TO Press 2 to display the CLEAR ALARMS screen then press 1 again to clear all alarms R ALARMS EAR ALL ALARMS ETURN 0 Liebert RAC2 8 e 13 Set Clock Sub menu Override Submenu 14 User Manual 9 97 Section 3 Operation From the Main Menu press 4 SET CLOCK to display the Set Clock Sub menu ET CLOCK ME DATE DAY OF WEE RETURN 1 DATE Press 1 to set the system date MO 07 15 96 15 12 34 SET DATE MM DD YY THEN PUSH ENTER PUSH CLEAR TO RETURN The first line displays the current system day date and time Enter the new date then press E to r
14. Temperature and humidity options apply to Zone 1 The system inputs come from a remote temp hum sensor Each alarm can be disabled by entering 00 as the alarm trip point Temperature Staging turns on a Standby unit when the room temperature exceeds the Normal Temperature by the number of degrees entered in Sensitivity Also note that temperature can be displayed in either degrees F or degrees C 24 User Manual 9 97 Section 3 Operation Setup Standby Unit Options Press 9 from the Main Menu to display the Set Standby Unit Options screen RAC2 8 MAIN MENU S Auto Seque ncing Standby Testing Day Interval At Time ESC gt O EXIT Auto Sequencing ET STANDBY UNIT OPTIONS ON OFF 89 07 00 0 for OFF gt OFF ENT ER 1 for ON SET STANDBY UNIT OPTIONS Auto Sequencing Standby Testing Day Interval At Time ESC TO EXIT OFF OFF 89 07 00 Two options are available for controlling Standby units in addition to Autochangeover The RAC2 8 will operate with both of these options turned OFF or with one of them turned ON Select the option or neither required for your installation The interval in days and time of day are user selected Auto Sequencing balances the run time of units by changing the status of a Standby unit to Running and changing the Running unit to Standby Standby Testing tests the operating condition
15. of status messages are displayed at a local terminal if one is connected While an Override screen is displayed alarm messages are stored but not displayed Force ON of any unit Selected from the Override screen at the display This action causes the selected unit to be turned ON and held ON until further action is taken The unit remains ON until it is Forced OFF or Restored to normal Force OFF of any unit Selected from the Override screen at the display This action causes the selected unit to be turned OFF and held OFF until further action is taken The unit remains OFF until it is Forced ON or Restored to normal Restore to normal Selected from the Override screen at the display This action returns the selected unit to the programmed control of the RAC2 8 The unit returns to its operating status Running or Standby as defined in Unit Zone Setup A four digit number used to limit access to setup information and clearing of alarms A Password if active 1s required for entry to the Main Menu Assign a new Password from the display A Password of 0000 disables the Password function at the local display TERM disables the password at a local terminal The Password is always required for a remote terminal through a modem During a failure of power to the RAC2 8 units can be programmed to be ON by manually setting jumpers inside the enclosure This assumes that power will be available to the units When power is res
16. 1 through 08 ET OPTIONS MEN SET UNIT LABEL ABEL 01 02 03 ESC TO QUIT gt 1 Alarms Review and Alarms Clear Press 3 or 4 from the Main Menu to access the Alarms Review and Alarms Clear screens The RAC2 8 can store and display up to 20 Alarms with time and date stamp All alarms are latching and must be cleared manually RAC2 8 MAIN MENU NO ALARMS PRESENT 07 18 96 00 25 47 ALARMS CLE Set Clock Press 5 from the Main Menu to display the Set Clock screen RAC2 8 MAIN MENU Current Date Time is THU 07 18 96 00 25 50 Enter New Date Tim DOW MM DD YY HH MM MON 07 22 96 09 15 Current Date Time is MON 07 22 96 09 15 00 Set the new date and time as desired 0 Liebert RAC2 8 e 21 Override A Unit 22 User Manual 9 97 Section 3 Operation Press 6 from the Main Menu to display the Override a Unit screen A unit can be Forced ON Forced OFF or Restored to automatic control RAC2 8 MAIN M OVERRIDE UNIT EL STATUS NNING NNING ANDBY ANDBY N A E P HH ING DBY OGRAMMED OGRAMMED ESC TO QUIT gt 3 E Ci Ci O0 20 Ca 02 2 2 2 OFF E 14 12 On UNIT 03 FORC NO Ed Ed E A UNIT EL STATUS NNING NNING RCED ON ANDBY N A P P HOC ING DBY OGRAMM OGR
17. A Temperature Alarm activates the Common Alarm output High Range up to 90 F 32 C Low Range down to 50 F 10 C Refer to Temperature Staging The RAC2 8 can be programmed to use Standby units along with Running units for increased capacity in Zone 1 If more than one Standby unit is available these units can be staged to turn on as temperature increases Temperature Staging is selected from the display This mode is the best way to control room temperature after recovering from a power failure a remote T H sensor is required Normal Temperature The temperature to be maintained when Temperature Staging is ON Normal Temperature is selected from the display Range S0 to 90 F 10 to 32 C in 1 degree increments Temperature Sensitivity The number of degrees from the Normal Temperature which causes the next Standby unit to be turned ON As temperature approaches Normal the Standby units are turned OFF in first on last off order Sensitivity is selected from the display in 1 degree increments and is a small number A local terminal can be connected directly to the RAC2 8 or a remote terminal can be connected through modems Two EIA 232 ports are available at the enclosure All of the status information and control functions available at the RAC2 8 local display are available from the terminal An additional function available at the terminal is Set Modem The terminal also displays a status message with time and date
18. AMM D D ESC TO QUIT 3 HZ PRESS UNIT 1 FORCE ON 2 FORCE OFF 3 RESTORE 07 22 96 12 14 19 On UNIT 03 R Section 3 Operation Set Modem Options Press 7 from the Main Menu to display the Set Modem Options screen RAC2 8 MAIN M SET MODEM OPTIONS Phone Number Site ID Dial Prefix ATE1X4DT Redial Interval minutes Redial Tries Forev odem Messages Y N No TO EXIT ne Number 7944 Le 2 Se 4 5a 6 lt P SET MODEM OPTIONS Phone Number 7944 Site ID Dial Prefix ATE1X4DT Redial Interval minutes Redial Tries Forev Modem Messages Y N No ESC TO EXIT Site ID AIR ROOM 1 x These parameters are unique to terminal operation The Site ID up to 20 characters is user selected to identify a specific facility The Dial Prefix activates the modem and therefore must be compatible with the modem The Dial Prefix is factory set Do not change the Dial Prefix without consulting the modem user s manual Modem messages describe modem activity such as No Answer Line Busy Redial in 3 Minutes etc Select Yes if you want these messages displayed at the terminal Make modem baud rate selection by setting DIP Switch 2 1 inside the RAC2 8 enclosure Refer to Figure 5 4 in SECTION 5 INSTALLAT
19. AMMED 1 8 KEY lt ESC TO QUIT gt 3 R RUN or S STANDBY ESC to quit gt 07 17 96 NIT 03 SHUTDOWN T STATUS ABEL ZONE STATUS NING NING NDBY NDBY NING NDBY NPROGRAMMED NPROGRAMMED ESC TO QUIT gt 1 E uUyUPrprarrazg SONNHHHH 2 2 A K Setup Zones Units Options cont d EMERGENCY POWER UNITS ET OPTIONS The number of Running units can be reduced to limit the load on the SET EME ER UNITS backup power source a UPS system ABI E EMERGENCY POW or a standby generator 0 000 0000 HOONNHHHA RUN RUN RUN RUN OFF RUN RUN RUN C T ES O QUIT 1 Unit Shutdown on Alarm When an alarm occurs in a Running unit the Standby unit in the same zone will be turned ON The unit in alarm will remain ON unless it is programmed to be turned OFF Yes ET OPTIONS ME SET UNIT SH UNIT LABEL ZO NU UTDOWN ON ALARM NE SHUTDOWN S 1 YES 1 NO 1 NO 1 NO 2 NO 2 0 9 Liebert RAC2 8 e 19 20 User Manual 9 97 ESS 088 Ky lt Section 3 Operation gt 1 Section 3 Operation Unit Labels The RAC2 8 will accept any 2 digit label if you prefer something other than 0
20. C2 8 control power is maintained This Normally Closed contact must be Open for 0 5 seconds for the input signal to be detected After the input signal is removed closed the alarm must be manually cleared Then all units programmed to be Running are started sequentially separated by the Restart Delay This user input activates a separate mode for operating on an emergency power source a UPS system or standby generator which may have limited capacity Only units selected to be ON during this mode are running Select ON units for this mode from the display Autochangeover Autosequencing and Standby Testing are inactive during this mode to reduce power load Units that are OFF during this mode will remain OFF until normal mode is resumed This mode also energizes both lockout relays Humidity and Optional Control To manually turn a unit ON from the display Refer to Override To manually turn a unit OFF from the display Refer to Override Delay after turn ON of a Standby unit to allow the newly started unit to gain control During the Hold Delay alarms from this unit and all other units are ignored This delay begins when any changeover Occurs either in Autosequence or Standby Test mode An active Hold Delay can be monitored at the display At the end of the Hold Delay the Alarm Delay time begins The Hold Delay is user selectable from the display Range 0 1 to 60 minutes selectable in increments of 0 1 minute 6 seconds
21. C2 8 MAIN MI Status Setup Zones Units Options Menu Alarms Review Alarms Clear Set Clock Override a Unit Set Modem Options Setup Temp Humid Options Menu Setup Standby Unit Options Display SS Alarm Block Set New Password Exit D Each Main Menu item has a corresponding screen that lets you configure the system parameters Each screen is shown in the following sections Section 3 Operation Status Screen The Status screen is displayed by pressing the lt S gt key no password required or by pressing the lt 1 gt key from the Main Menu RAC2 8 STATUS 07 16 96 09 22 13 Temperature 70 6 F Humidity Modem OFF UNIT LAB ZONE RG PWR SHUTDOWN STATUS 01 02 R Y RN RN RN ON RN RN RN NING NING NING NDBY ROGRAMM ROGRAMM ROGRAMM ROGRAMM mii 2 12 2 2 Ed Dd Dd gu tut Alarm Delay 10 Hold Delay 10 Auto Restart Delay 00 High Temperature Alarm 00 Low Temperature Alarm High Humidity Alarm 00 Low Humidity Alarm 00 High Humidity Lockout 00 Low Humidity Lockout AUTO SEQUENCING ON STANDBY TESTING OFF DAY 01 of 59 00 00 Temperature Staging OFF NO ALARMS PRESENT Press menu selection 1 X key ESC to display Main Menu Configure the parameters as desired 0 Liebert RAC2
22. ION Set Switch 2 2 to ON down if you are using a leased line The Modem must be Hayes or Hayes compatible Switches inside the modem should remain factory set except the following which are user selectable 0 Liebert RAC2 8 e 23 Section 3 Operation Set Modem Options cont d Hang up on DTR on off transition Model 1200 SW1 up and SW10 down Model 2400 amp D3 Track status of carrier detect Model 1200 SW6 up Model 2400 Enable Auto answer Model 1200 SWS up Model 2400 S0 1 Setup Temp Humid Options Press 8 from the Main Menu to display the Setup Temp Humid Options screen RAC2 8 MAIN MENU SET TEMP HUMIDITY OPTIONS High Temperature Alarm Low Temperature Alarm High Humidity Alarm Low Humidity Alarm Temperature Staging Normal Temperatur Sensitivity 02 Temp Display F C High Humidity Lockout Low Humidity Lockout C gt TO EXI h Temperature Alarm 50 90 gt 80 P HUMIDITY OPTIONS Hig 80 Low 1 00 Hig idi l 00 Low Humidity Alarm 00 emperature Staging OFF Normal Temperatur 70 Sensitivity 02 Temp Display F C F High Humidity Lockout 60 Low Humidity Lockout 00 ESC gt TO EXI Temperature Staging ER 1 for ON 0 for OFF gt ON Setup Temp Humid Options cont d
23. T to configure the restart delay ENTER RESTART D 00 1 XX X MIN THEN PUSH ENTER PUSH CLEAR TO RE Enter the desired time for the restart delay The default is 0 1 minutes Press Enter to accept the new delay then press C to return to the Set Delays menu When you have configured the delays from the Set Delays menu press 5 to return to the Set Options Sub menu 3 TEMP HUM From the Set Options Sub menu press 3 TEMP HUM to display the Set T H menu I T H MENU T H ALARM POINTS TEMP STAGING F C 4 LOCK The Set Temp Hum and Temp Staging functions apply only to Zone 1 The temperature and humidity inputs are from a separate remote sensor not from an operating unit From the Set T H menu press 1 T H ALARM POINTS EMP gt 75 LOW gt 65 UM HI gt 60 LOW gt 40 RANGE 50 90 00 off E NEXT C RETURN Beginning with Temp Hi enter the temperature and humidity alarm points The third line displays the range for the alarm limit you are selecting Press E to continue to the next point When you have set all points press C to return to the Set T H menu From the T H menu press 2 TEMP STAGING STAGING ON OFF NORMAL TEMP SENSITIVITY 1 0N Beginning with Staging ON OFF configure each parameter Press E at the last parameter to return to the T H menu From the T H menu press 3 F
24. arted unit has an alarm at the end of this delay plus the Alarm Delay this unit is shut down and the previously running unit is restarted An alarm is indicated on the LCD and the alarm 1s annunciated 0 Liebert RAC2 8 e 29 C key Clear Alarms Common Alarm Inputs Common Alarm Output Control Lockout 30 User Manual 9 97 Section 4 Glossary of Control Functions If a zone includes more than 1 Standby unit the same actions occur At the end of each Interval one unit is started and one is stopped For example if two Standby units are used the First is started after the First Interval The unit that had been running the longest becomes the Standby unit After the second Interval the second Standby unit is started and the Running unit with the longest operating time becomes the Standby unit The Clear key lt C gt at the local control panel serves two functions e Remove incorrectly entered data e Return to the previous display page alarms are latching and must be manually cleared from the control panel or from a terminal Be sure to review alarms before clearing them because recent alarm history is your best indication of system performance When alarms are cleared units that are running because of an Autochangeover will change back to their programmed status Each environmental control unit has a Common Alarm contact closure output The RAC2 8 receives the Common Alarm from each unit as a control i
25. ass Word onte rena iate te ber enit bre 26 SECTION 4 GLOSSARY OF CONTROL FUNCTIONS ce 27 SECTION 5 INSTALLATION Tienen enne then teen trente tests testes ten 37 0 Liebert RAC2 8 e Figure 1 Figure 2 1 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 TABLE OF FIGURES Typical System Configuration 111 Tocal Control Panel ii ins 3 RAC2 8 Dimensional Enclosure Diagram sess 39 RAC2 8 Component Arrangement esses 40 RAC2 8 Connection Diagram qui ede eerte te e e Ree Reeve i 45 RAC2 8 Switch and Jumper Settings ener 42 ii e User Manual 9 97 Power Source Aux Pwr Out Terminal Modem 120 VAC 24 VAC 2A Port Port SiteScan EIA 422 EIA 232 EIA 232 Twisted Pair Common Alarm Liebert Temp Humid Module p n THS28 xx Output Emergency Power Oper Input Humidity Lockout Relay Optional Lockout Relay Emergency Power Off UE Common Control Common Control Common Control Input Alarm Input Alarm Input Alarm Output Output Output UNIT 1 UNIT 2 UNIT 8 Figure i Typical System Configuration 0 Liebert RAC2 8 e iii Section 1 Introduction See SECTION 5 The Liebert RAC2 8 remotely controls from two to eight environmental INSTALLATION for special units Each unit is assigned to a Zone room from 1 to 4 In Zone 1 the instructions when using the RAC2
26. ch as Common Alarm inputs and Temp Hum alarms Warnings are produced for conditions such as Manual Override List of Alarms UNIT XX COMMON ALARM Alarm EMERGENCY POWER OFF Alarm EMERGENCY POWER OP Alarm MANUAL OVERRIDE Alarm HIGH TEMP ALARM Alarm LOW TEMP ALARM Alarm HIGH HUM ALARM Alarm LOW HUM ALARM Alarm STBY NOT AVAILABLE Alarm STBY UNIT FAILED Alarm UNIT XX FORCED ON Warning no audible alarm UNIT XX FORCED OFF Warning no audible alarm UNIT XX RESTORED Warning no audible alarm 0 Liebert RAC2 8 e 27 Alarm Annunciation Alarm Communications Alarm Delay Autochangeover 28 User Manual 9 97 Section 4 Glossary of Control Functions The RAC2 8 provides the following alarm annunciation mechanisms e Audible indication horn e lighted Alarms Present front panel indicator e Activation of the Common Alarm relay output e Display of alarm messages on the front panel LCD Warnings activate the Alarms Present indicator and a message on the LCD but no audible alarm or Common Alarm When an alarm occurs the LCD immediately displays a message unless an Override screen is being displayed Pushing the Alarms Present Silence pushbutton acknowledges the alarm and silences the alarm horn The alarm message is displayed until the alarm is acknowledged silenced After the alarm is silenced normal status display scanning resumes Any alarms present are displayed during scanning of no
27. closure turns all units ON This action also annunciates an alarm energizes the Common Alarm output relay and energizes the Control Lockout relay To return to normal operation turn this switch off and clear the alarm Refer to Override for manual operations from the display The RAC2 8 includes an EIA 232 modem port to provide remote display of alarms This same port also allows system monitoring and programming from a remotely located terminal Operation from a remote terminal requires a Password after the LOG ON prompt If a remote terminal is active alarms are displayed at the terminal instead of being dialed out The modem selections such as phone number redial interval etc are made from a local or remote terminal Modem baud rate is selected using switches inside the RAC2 8 enclosure Section 4 Glossary of Control Functions Normal Temperature Override Password Power Failure Mode Refer to Temperature Staging The RAC2 8 allows manual control of units from the display and also from switches inside the enclosure To manually tum all units ON refer to Manual Override To manually select units to be ON during a control power failure refer to Power Failure Mode Manual Override control from the display includes Force ON Force OFF and Restore to normal operation If any unit is Forced ON or OFF a warning message is recorded and the Alarm Present light is illuminated but the audible alarm horn is not sounded Changes
28. eturn to the Set Clock Sub menu 2 TIME Press 2 to set the system time MO 07 15 96 15 12 34 ET TIME HH MM SS HEN PUSH ENT USH CLEAR TO R The first line displays the current system day date and time Enter the new time then press E to return to the Set Clock Sub menu 3 DAY OF WEEK Press 3 to set the system day of the week Enter the appropriate number for the desired day When finished press 8 to return to the Main Menu From the Main Menu press 5 OVERRIDE to display the Override a Unit screen OVERRIDE A UNIT ENTER UNIT EN PUSH ENTER PUSH CLEAR TO R THI Section 3 Operation The Override function lets you manually force a unit ON or OFF or to restore a forced unit to the normal control of the RAC2 8 system The Override function acts immediately ignoring the Hold Delay An override message with time stamp is entered in the Alarm memory buffer The Alarm light remains on while any unit is in an Override mode To override a unit enter the two digit label assigned to the unit then press Enter UNIT 01 FORC 2 FORCE OFF 3 RESTORE 4 RETURN Select the desired override option When finished press 4 to return to the Main Menu 0 Liebert RAC2 8 e 15 Terminal Main Menu Main Menu cont d When you make a program selection from the terminal the screen is displa
29. for communication to a Liebert SiteScan monitoring system The RAC2 8 can be operated locally from the built in control panel or remotely from an optional terminal EIA 232 communication This manual shows examples of several typical display screens during both local and remote operation Liebert RAC2 8 1 Section 2 Start Up To start up the RAC2 8 1 2 3 Mount unit to wall Connect cables Set switches and jumpers on circuit boards as required for your application Refer to instructions and illustrations in SECTION 5 INSTALLATION Make user programmable selections from the local control panel or from an optional remote terminal Refer to SECTION 4 GLOSSARY OF CONTROL FUNCTIONS and SECTION 3 OPERATION Apply power to the unit Note that the ON OFF switch is inside the enclosure Figure 2 1 Local Control Panel 0 Liebert RAC2 8 e 3 TEMP 71 8 F HUM 47 MO 07 15 96 13 26 55 4 User Manual 9 97 Section 3 Operation This chapter describes how to use the RAC2 8 Local The following screens are displayed at the LCD display built into the RAC2 8 unit control panel Refer to SECTION 4 GLOSSARY OF CONTROL FUNCTIONS for more details Sequencing Status Screens With power ON the following status screens are displayed in sequence LIEBERT RAC2 8 TEMP 71 8 F HUM 47 MO 07 15 96 13 26 55 NO ALARMS PRESENT S ZONE 02 5
30. he application at your installation is critical the location should also provide limited access to the controller The RAC2 8 enclosure is surface mounted using four 1 4 in bolts The power cord is factory wired Note that the use of a 220 VAC 50 60 Hz power source must be selected when the unit is ordered This is not a field selectable option Two EIA 232 ports are available at the bottom of the enclosure All other customer cables enter through knockouts at the bottom of the enclosure The RAC2 8 includes a lithium backup battery for control memory The battery 1s disconnected from the system for storage and shipment Set DIP switch 2 8 to ON to connect the battery The RAC2 8 may show an alarm from a Liebert DataMate mini MATE and or mini MATE Plus unit when an alarm condition does not in fact exist If you are using or plan to use the RAC2 8 with the Liebert DataMate mini MATE and or mini MATE Plus remove the C5 capacitor at the K5 common alarm relay to avoid false alarms 1 Puton an anti static wrist strap 2 Turn the main disconnect switch OFF 0 Liebert RAC2 8 e 37 Interface Board 4C13521G Located in the DataMate mini MATE or mini MATE Plus 38 e User Manual 9 97 Section 5 Installation 3 Using wire cutters carefully snip and remove the C5 capacitor at the K5 common alarm on the interface board Refer to the diagram below for the location of the C5 capacitor A K5 K E i N 0000
31. nput These alarms are annunciated only if the programmed Delays Hold and or Alarm are exceeded A Common Alarm from a Running unit causes a Standby unit to be turned ON and turns OFF the Running unit if shutdown is selected A Common Alarm from a Standby unit causes the unit to be unavailable A Form C contact labeled Common Alarm is available for customer use This relay is energized during the following conditions e A Common Alarm input from one of the units A Temp Hum Alarm e Manual Override ALL ON internal switch e Emergency Power Operation mode e Emergency Power OFF The Common Alarm is de energized by the Silence pushbutton if DIP switch 1 7 is ON A Form C contact labeled optional Control Lockout is available for customer use This relay is energized during the following conditions e Manual Override internal switch all units on e Emergency Power Operation mode Section 4 Glossary of Control Functions Delay E key Emergency Power OFF EPO Emergency Power Operation Force ON Force OFF Hold Delay Refer to Alarm Delay Hold Delay and Restart Delay The Enter key lt E gt at the local control panel serves two functions e Causes data entered in setup display pages to be stored in the RAC2 8 permanent memory e Causes selection of next unit on multi unit displays EPO can be initiated from a remote switch wired to the RAC2 8 This user input causes all units to be turned OFF immediately RA
32. of a Standby unit by turning it ON for a period of time equal to the Hold Delay plus the Alarm Delay The Running unit is turned OFF during this period if it 1s programmed to shutdown on an alarm 0 Liebert RAC2 8 e 25 Section 3 Operation Display SS Alarm Block This display is useful to a Liebert Customer Engineer for system diagnostics Set New Password Press P from the Main Menu to configure a password for terminal operation Enter New Password 4 chars lt ESC to quit Confirm New Password 4 chars ESC to quit OK This Password can be different from the one used locally at the RAC2 8 Enter TERM to disable the Password function from the terminal A Password is always be required when accessing the RAC2 8 system through a modem 26 User Manual 9 97 Section 4 Glossary of Control Functions Alarms The following terms are used to describe the control and operation of the Liebert RAC2 8 For each term both the operator actions and the system performance are defined Refer to this section if necessary while setting up your system or to answer any questions about how the system operates For each alarm condition or warning condition the RAC2 8 locally annunciates the condition locally displays the message provides a time and date stamp stores up to 20 messages in memory and displays the message at a remote terminal Alarms are produced for normal alarm conditions su
33. on From the Set Units menu press 4 SHUTDOWN to display the Shutdown on Alarm screen SHUTDOWN ON ALARM 01 Y 02 Y 03 Y 04 Y 05 Y 06 Y 07 Y 08 Y 1 YES O NO E NEXT Beginning with unit 01 indicate 1 Yes or O No if the unit should shut down on alarm When you have selected the shutdown status for the last unit the RAC2 8 displays the Set Units menu When you have configured the delays from the Set Units menu press 5 to return to the Set Options Menu 2 DELAYS From the Set Options Sub menu press 2 DELAYS to display the Set Delays menu ELAYS MENU LARM 2 HOLD NIT RESTART ETURN From the Set Delays menu press 1 ALARM to configure the Alarm Delay ENTER ALARM DELAY lt 10 0 gt XX X MINU THEN PUSH ENTER PUSH CLEAR TO RE Enter the desired time for the alarm delay The default is 10 minutes Press E to accept the new delay then press C to return to the Set Delays menu From the Set Delays menu press 2 HOLD to configure the Hold Delay ENTER HOLD DELAY lt 10 0 gt XX X MIN THEN PUSH ENTER PUSH CLEAR TO R Enter the desired time for the hold delay The default is 10 minutes Press E to accept the new delay then press C to return to the Set Delays menu Section 3 Operation Set Options Sub menu cont d From the Set Delays menu press 3 UNIT RESTAR
34. pses 4 R DELAY From the Status Sub menu press 4 R DELAY to display the Restart Delays screen ESTART DELAYS 000 0000 0000 0000 000 0000 0000 0000 USH CLEAR TO RETURN The Restart Delays screen indicates the time in seconds of an active restart delay on each unit 5 H DELAY From the Status Sub menu press 5 H DELAY to display the Hold Delay screen Hold Delay applies to the system rather than to each unit Therefore only one number is displayed This display indicates the time in seconds of an active Hold Delay From the Main Menu press 2 SETUP to display the Set Options Menu ET OPTIONS MI UNITS ELAYS TEMP HUM STANDBY PASSWORD RETURN 1 UNITS From the Set Options Sub menu press 1 UNITS to display the Set Units menu ET UNITS MENU ZONES UNITS EMER OP 3 SHUTDOWN Section 3 Operation Note that the Clear button will not allow you to exit these screens until all selections have been made Set Options Sub menu cont d From the Set Units menu select 1 ZONES UNITS to select the number of zones number of units in each zone and operating status of each unit Complete all of these selections before exiting this setup function When you press 1 ZONES UNITS the RAC2 8 sequences through the screens you must complete ER OF ZONI 4 gt FOR NEXT ER OF UNITS
35. rd ER PASSWORD Units are shipped from the factory with the Password function disabled To enable the Password function press the MENU button to display the Main Menu then press 2 SETUP Follow the instructions on page 12 to Set Password Press the Menu button to display the Main Menu Press 9 to display RAC2 8 revision code and date From the Main Menu press 1 STATUS to display the Status Sub menu Section 3 Operation STATUS MENU L UNITS Sie A DELAY Sie H DELAY 1 UNITS From the Status Sub menu press 1 UNITS to display the Unit Status menu UNIT STATUS 01 R 02 S 03 R 04 S 05 R 06 S 07 R 08 S A ALM S STBY R RUN 2 T H From the Status Sub menu press 2 T H to display the Temperature Humidity screen EMP 71 8 F HUM 47 TAGING OFF USH CLEAR TO RI 3 ADELAY From the Status Sub menu press 3 A DELAY to display the Alarm Delays screen ALARM DELAYS 0000 0000 0000 0000 0000 0000 0000 0000 PUSH CLEAR TO RETURN 0 Liebert RAC2 8 e 7 Status Sub menu cont d Set Options Sub menu Set Options Sub menu cont d 8 User Manual 9 97 Section 3 Operation The Alarm Delays screen indicates the time in seconds of an active delay on each unit Active alarm delays count up while the condition is present and count down if the condition is cleared before the Alarm Delay time ela
36. rmal display pages If more than 4 alarms are present additional pages of alarms are created as necessary Up to 20 alarms are stored in a First In First Out sequence EIA 232 Terminal Port Transmits Alarm with time stamp EIA 232 Modem Port Dials out alarm Both EIA 232 ports are compatible with SS AMS SiteScan Alarm Management System EIA 422 proprietary to SiteScan monitoring system Delay before an alarm is annunciated false alarm delay This delay begins on the occurrence of an alarm condition in a unit If the alarm condition has not corrected itself by the end of the delay period the alarm is annunciated and an autochangeover to the standby unit Occurs If a unit is programmed to shutdown on an alarm the unit shuts down when the alarm is annunciated The Alarm Delay timer counts both up and down and an active Alarm Delay timer can be monitored at the display The Alarm Delay is user selectable from the display Range 0 1 to 60 minutes in increments of 0 1 minute 6 sec If an alarm occurs in a Running unit a Standby unit in the same zone is started The Running unit in alarm is stopped if it is programmed to shut down and the Standby unit is started The Standby unit changes status to become the Running unit and remains running until the Alarm is manually cleared Messages are written to the terminal to record the status changes Status screens show new unit status at the local display After a changeover the newly s
37. stamp whenever a unit changes status OFF or ON The terminal baud rate is selected by using switches inside the enclosure Each environmental control system connected to the RAC2 8 is called a Unit Each Unit is located in a Zone is assigned a Label and a status Running or Standby All of these selections are made from the display for 2 to 8 units The RAC2 8 monitors Unit Common Alarms and turns Units ON or OFF from the automatic control program or from manual inputs 9 Liebert RAC2 8 e 35 Zones 36 User Manual 9 97 Section 4 Glossary of Control Functions Each area room controlled by the RAC2 8 is called a Zone Zones are numbered 1 through 4 Zone 1 should be the largest or most important room it is the only Zone that can be monitored by a Temp Hum sensor and the only Zone that can be controlled by Temperature Staging Each Zone contains at least one Unit Section 5 Installation Refer to Figure i on Page iv in the beginning of this manual for a typical system configuration Refer to the following drawings including notes for details of wire terminations and switch settings for inputs and outputs used at your installation Call Liebert Environmental Support at 1 800 543 2778 if you require any assistance for the installation or operation of your RAC2 8 Autochangeover controller Installation cont d Select a location for the RAC2 8 that is convenient for both operation and cable routing If t
38. tarted unit may briefly have a High Temp or other alarm A user selectable Hold Delay begins when any Section 4 Glossary of Control Functions Autosequencing unit is turned ON During the Hold Delay no alarms are annunciated from the started unit or any unit in the system If the Standby unit has an alarm the Running unit is restarted if DIP switch 1 8 is ON Also whenever the alarm is cleared in a Running unit the unit is turned on and the Standby unit is turned off An optional operating mode in which Standby units are periodically sequenced to RUN to balance operating time among all units Select Autosequencing ON or OFF from the display Note that Autosequencing and Standby Testing cannot both be ON at the same time When Autosequencing is ON periodically the Standby and Running units are changed to balance unit running time This interval in days and time of day are user selected from the display When this changeover Occurs the Standby unit becomes a running unit and the Running unit that has been running the longest becomes the Standby Unit Messages are written to the terminal to record the status changes Status screens show new unit status at the local display After a changeover the newly started unit may briefly have a High Temp or other alarm A user selectable Hold Delay begins when any unit is turned ON During the Hold Delay no alarms are annunciated from the started unit or any unit in the system If the newly st
39. tored to the 2 8 all units programmed to be Running during normal operation are sequentially started separated by the Restart Delay Compare this mode with Emergency Power operations which is selectable from the display and applies to power being available from a standby source 0 Liebert RAC2 8 e 33 Restart Delay Restore Running Units Shutdown Site ID SiteScan Standby Testing Standby Units 34 User Manual 9 97 Section 4 Glossary of Control Functions The length of time between a request to tum ON a unit and when the unit is actually turned ON Also the length of time between the start of each successive unit after power is applied or restored This delay prevents an excessive inrush current demand on the power source Restart Delay is typically very short and is user selectable from the display Range 0 1 to 60 minutes in increments of 0 1 minute 6 seconds To return a Forced ON or Forced OFF unit to normal control Refer to Override The units selected to be ON during an operating mode Select Running units from the display Units not selected for Running status are given Standby status Running units can be turned OFF by Autochangeover Autosequencing or Standby Testing When a Running unit is in an alarm condition it can be programmed to remain running or be shut down Select Shutdown Yes or No from the display The user assigned identification of this facility up to 20 characters
40. yed again with the new value s 16 User Manual 9 97 Section 3 Operation A local terminal can be connected directly by an EIA 232 communication cable to the RAC2 8 or a remote terminal can be connected through modems All of the status information and control functions available at the RAC2 8 local display are available from the terminal An additional function available at the terminal is Set Modem The terminal also displays a status message with time and date stamp whenever a unit changes status OFF or ON These status messages will be printed if a printer instead of a terminal is connected to the EIA 232 port Once each 24 hours at midnight the terminal checks its ability to communicate with the RAC2 8 and writes a Comm Check message A terminal connected to an active RAC2 8 displays alarm and status messages when they occur The prompt then asks the operator to press space S or lt A gt 07 15 96 12714812 On UNIT 03 FORCED ON 07 15 96 12 14 19 On UNIT 63 RESTORED Menu Exited Press lt space gt to Enter Menu lt S gt for Status lt A gt for Alarms lt space gt displays Main Menu after a password is entered lt S gt displays present status lt A gt displays a list of alarms up to 20 LOG ON is the prompt to enter a password This prompt is also displayed when the system is accessed through a modem The Main Menu is displayed on a terminal as shown below A

Liebert RAC2-8 User's Manual

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