Carrier WeatherExpert 48N2 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for WeatherExpert 48N2: Installation instructions Installation instructions Controls, start-up, operation, service, and troubleshooting Installation instructions

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Carrier WeatherExpert 48N2 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 29 page image

29(SOFT KEY 2) to save the configuration and return to theClock Set menu.8. Press EXIT (SOFT KEY 1) twice to return to the mainmenu.Programming Operating Schedules — TheComfortLink controls will accommodate up to eight differentschedules (Periods 1 through 8), and each schedule is assignedto the desired days of the week. Each schedule includes an oc-cupied on and off time. As an example, to set an occupiedschedule for 8 AM to 5 PM for Monday through Friday, theuser would set days Monday through Friday to ON for Period1. Then the user would configure the Period 1 Occupied Frompoint to 08:00 and the Period 1 Occupied To point to 17:00. Tocreate a different weekend schedule, the user would use Period2 and set days Saturday and Sunday to ON with the desired Oc-cupied On and Off times.NOTE: By default, the time schedule periods are programmedfor 24 hours of occupied operation.To create a schedule, perform the following procedure:1. Scroll to the Configuration mode, and select CCN CON-FIGURATION (CCN). Scroll down to the ScheduleNumber (ConfigurationIAQSC.OV=SCH.N). Ifpassword protection has been enabled, the user will beprompted to enter the password before any new data isaccepted. The default password is 1111. SCH.N has arange of 0 to 99. The default value is 1. A value of 0 is al-ways occupied, and the unit will control to its occupiedset points. A value of 1 means the unit will follow a localschedule, and a value of 65 to 99 means it will follow aCCN schedule. Schedules 2-64 are not used as the controlonly supports one internal/local schedule. If one of the 2-64 schedules is configured, then the control will force thenumber back to 1. Make sure the value is set to 1 to use alocal schedule.2. Enter the Time Clock mode. Scroll down to the LOCALTIME SCHEDULE (SCH.L) sub-mode, and press EN-TER. Period 1 (PER.1) will be displayed.3. Scroll down to the MON point. This point indicates ifschedule 1 applies to Monday. Use the ENTER commandto go into Edit mode, and use the UP or DOWN key tochange the display to YES or NO. Scroll down throughthe rest of the days and apply schedule 1 where desired.The schedule can also be applied to a holiday.4. Configure the beginning of the occupied time period forPeriod 1 (OCC). Press ENTER to go into Edit mode, andthe first two digits of the 00.00 will start flashing. Use theUP or DOWN key to display the correct value for hours,in 24-hour (military) time. Press ENTER and hour valueis saved and the minutes digits will start flashing. Use thesame procedure to display and save the desired minutesvalue.5. Configure the unoccupied time for period 1 (UNC). PressENTER to go into Edit mode, and the first two digits ofthe 00.00 will start flashing. Use the UP or DOWN key todisplay the correct value for hours, in 24-hour (military)time. Press ENTER and hour value is saved and the min-utes digits will start flashing. Use the same procedure todisplay and save the desired minutes value.6. The first schedule is now complete. If a second scheduleis needed, such as for weekends or holidays, scroll downand repeat the entire procedure for period 2 (PER.2). Ifadditional schedules are needed, repeat the process for asmany as are needed. Eight schedules are provided.SERVICE TESTGeneral — The units are equipped with a Service Test fea-ture, which is intended to allow a service person to force theunit into different modes of operation. To use this feature, enterthe Service Test category on the Navigator display and placethe unit into the test mode by changing Service TestTESTfrom OFF to ON. The display will prompt for the password be-fore allowing any change. The default password is 1111. Oncethe unit enters the Service Test mode, the unit will shut downall current modes.TEST — The TEST command turns the unit off (hard stop)and allows the unit to be put in a manual control mode.STOP — The STOP command completely disables the unit(all outputs turn off immediately). Once in this mode, nothingcan override the unit to turn it on. The controller will ignore allinputs and commands.S.STP — Setting Soft Stop to YES turns the unit off in anorderly way, honoring any timeguards currently in effect.FAN.F — By turning the FAN FORCE on, the supply fan isturned on and will operate as it normally would, controllingduct static pressure on VAV. SAV modulates from high to lowbased on the software's algorithms. To remove the force, pressENTER and then press the UP and DOWN arrows simultane-ously.The remaining categories: INDP, FANS, AC.T.C, HMZR,EXVS, COOL, and HEAT are sub-menus with separate itemsand functions. See Table 23.Service Test Mode Logic — Operation in the ServiceTest mode is sub-menu specific except for the INDP sub-menu. Leaving the sub-menu while a test is being performedand attempting to start a different test in the new sub-menu willcause the previous test to terminate. When this happens, thenew request will be delayed for 5 seconds. For example, ifcompressors were turned on under the COOL sub-menu, anyattempt to turn on heating stages within the HEAT sub-menuwould immediately turn off the compressors and 5 seconds lat-er the controller would honor the requested heat stages.However, it is important to note that the user can leave aService Test mode to view any of the local display menus (RunStatus, Temperatures, Pressures, Setpoints, Inputs, Outputs,Configuration, Time Clock, Operating Modes, and Alarms)and the control will remain in the Service Test mode.Independent Outputs — The INDP sub-menu itemscan be turned on and off regardless of the other category states.For example, the humidifier relay or remote alarm/auxiliary re-lay can be forced on in the INDP sub-menu and will remain onif compressor stages were requested in the COOL sub-menu.Fans — Upon entering the FANS sub-menu, the user will beable to enact either a manual or automatic style of test opera-tion. The first item in the sub-menu, Fan Test Mode Automatic(Service TestFANSF.MOD), allows the fan and the con-figured static pressure or building pressure control to begin asin the application run mode. During this automatic mode, it ispossible to manually control condenser fans 1 to 4.If Fan Test Mode Automatic (Service TestFANSF.MOD), is set to NO, then the user will have individual con-trol over duct static pressure (VFD speed), building pressureand condenser fan control. Additionally, the controller will pro-tect the system from developing too much static pressure. If thestatic pressure during manual control rises above 3 in. wg or ifthe Static Pressure Set Point (SetpointsSPSP) is greater than2.5 in. wg and static pressure is 0.5 in. wg higher than SPSP,then all options in the FANS menu will be cleared back to theirdefault OFF states.