Carrier OMNIZONE 50BV020-064 Installation And Service Instructions Manual

Also see for OMNIZONE 50BV020: Operating and troubleshooting guide

Contents

47DISPLAY ALARM HISTORY — If the controller is indicat-ing there are alarms, the user can view the alarm history bypressing the button. The LID display will show “AlarmHistory.” Press . The LID display will show the dateand type of alarm.As an example, if the LID display shows:ALARM — 10:55 02-11-04SFSThat display indicates that on 02-11-04 at 10:55 a.m. thesupply fan was either on when it had not been commanded onor was off when it was commanded on.The user can view other stored alarms by pressing the up anddown arrows. The twenty-four most recent alarms are stored.CONFIGURE CUSTOM PROGRAMMING SELEC-TIONS — To configure the custom programming selections,perform the following procedure:1. Press 37 . The LID display will show:Custom Program2. Press . The LID display will show:2.0 Global DictionaryOMNIZONE3. Press . The display indicates “No Data.” Pressthen press . Press again.The LID display should now show:Compressor Stages2.00 (sizes 020-034)4.00 (sizes 044-064)4. Press 7 times. The display will show:0 = RAT, 1 = MAT 2 = NONE0.005. Press 2 then . The display will show:0 = RAT, 1 = MAT 2 = NONE2.006. If RAS is installed at EWT input, press 3 times.The display will show:EWT Reset 0 = NO, 1 = YES0.007. Press 1 then . The display will now show:EWT Reset 0 - NO, 1 = YES1.008. Use the down and up arrows to select the other configura-tion parameters as required. See Table 24 for a list of con-figuration parameters.Table 24 — Configuration Parameters*Not used.SET CONTROLLER ADDRESS — To set the address of theOmnizone™ system control panel controller, perform the fol-lowing procedure:1. Press 7 and then . Press and then.2. Type in the CCN element number and press .3. Press the button. Type in the CCN bus number andpress .LOG OFF FROM CONTROLLER — To log off from theOMNIZONE system control panel controller Press 3 and then. The controller password will be displayed.1. Press . The display should show:Log in to ControllerLogged inIf this is not displayed, Press until it is dis-played.2. Press the button. The LID display will show:Log out of ControllerPress 1. Press to log off.Sequence of Operation (CV Only) — The follow-ing sequence applies to constant volume units only.Cooling is initiated when the set point in the remote thermo-stat is not met (space temperature is higher than set point). Theunit sequence of operation is as follows:The 50BV units can be remotely authorized to be controlledby the thermostat through the optional energy managementsystem relay (EMS). The coil is powered by the energy man-agement (building automation) system whose contacts are inseries with the ‘R’ 24-v ac terminal with potential across ‘C’(transformer common). With this terminal open, power will beinterrupted to the thermostat. Closure of this contact will allowthe 50BV unit to operate from the thermostat.Contact closure at the ‘G’ terminal will provide power tothe supply fan contactor, energizing the supply fan. The supplyfan will be off during unoccupied schedule, depending uponthe features of the thermostat used. The ‘O’ terminal energizesthe reversing valve (heat pump units only). Typically ‘Y1’ willalso be energized at this time for cooling operation. During thesecond stage of cooling, ‘Y2’ will be initialized after a mini-mum run time and after there is a differential from set pointplus a deadband or a proportional plus integral calculation,which is based upon demand and the length of time space-temperature is greater than set point. Additional assurance isprovided by a delay on make timer in the second stage com-pressor contactor circuit to avoid dual compressor in-rush start-ing current.For 4 compressor units, a call for the first stage of coolingwill turn on compressors 1 and 2. The second stage of coolingwill turn on compressors 3 and 4.Heating mode (heat pump models only) follows the samesequence as above except that the reversing valve is notenergized.WATER ECONOMIZER COOLING — The unit divertscondenser inlet waterflow through an optional economizer coilto precool evaporator entering airflow. If the entering watertemperature is colder than the setting on the aquastat, and thereturn-air temperature is warmer than the setting on the return-air thermostat, the 3-way diverting valve will direct water tothe economizer coil.Economizer water flow is in series with the condensersallowing compressor operation while the economizer isoperating.DESCRIPTION VALUE UNITS NAMECompressor Stages 2.00 NUM_CMPReset Ratio 3.00 dF RSET_RTOCDWF 0=NO,1=YES 0.00 CDFW_SWT*ECON 0=NO,1=YES 0.00 EWT_SNSEWT Reset 0=NO,1=YES 0.00 EWT_RST*MOD.VLV 0=NO,1=YES 0.00 MOD_ECON*0=CONST.,1=VARIABLE 0.00 FLOW_TYP0=RAT,1=MAT 2=NONE 2.00 MARA_SNSPHASE 0=NO,1=YES 0.00 PHAS_SWT*FREEZ 0=NO,1=YES 0.00 FREZ_SWT*ENABLE ECON. 68.00 dF ECON_SETSPT 0=NO,1=YES 0.00 SPT_SNSPRES 0=NO,1=YES 0.00 PRES_SNSTWR 0=NO,1=YES 0.00 TWR_SNSLWT 0=NO,1=YES 0.00 LWT_SNSIAQ 0=NO,1=YES 0.00 IAQ_SNSIRH 0=NO,1=YES 0.00 IRH_SNSBSP 0=NO,1=YES 0.00 BSP_SNSBSP Range 1.00 in. H2O BSP_RNGBSP LOW VALUE –0.50 in. H2O BSP_LOWHISTENTERALGOENTERENTERCLEAR EXPN/EDIT ENTERENTERENTERSRVC ENTEREXPN/EDITENTERENTERSETENTEREXPN/EDITENTER