Carrier 48HC 04-28 Controls, Start-up, Operation And Troubleshooting

Also see for /50HC 04-28: Manual

Contents

Carrier 48HC 04-28 Controls, Start-up, Operation And Troubleshooting Manual pdf 13 page image

13NOTE: An IAQ switch cannot be used if an enthalpy switch is al-ready on this input.IAQ SENSORIf an CO 2 sensor accessory was field installed, the unit must beconfigured for it by setting ConfigurationAIR.QIA.CFselects the unit response to this input. Default conversion to 0to 2000 ppm.OAQ SENSORIf an outdoor air quality sensor accessory was field installed,the unit must be configured for it by setting Configura-tionAIR.QOA.CF selects the unit response to this input.Default conversion to 0 to 2000 ppm.FAN STATUSIf a fan status accessory was field installed, the unit must beconfigured for it by setting ConfigurationUNITFN.SWto normally open (1) or normally closed (2). Normally open (1)is the preferred configuration.FILTER STATUSIf a filter status accessory was field installed, the unit must beconfigured for it by setting ConfigurationUNITFL.SW tonormally open (1) or normally closed (2). Normally open (1) isthe preferred configuration.Programming Operating SchedulesThe ComfortLink controls will accommodate up to eight dif-ferent schedules (Periods 1 through 8), and each schedule is as-signed to the desired days of the week. Each schedule includesan occupied 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 programmed for24 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 Schedule Num-ber (ConfigurationCCNSCH.O=SCH.N). If passwordprotection has been enabled, the user will be prompted toenter the password before any new data is accepted. SCH.Nhas a range of 0 to 99. The default value is 1. A value of 0 isalways occupied, and the unit will control to its occupied setpoints. 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 2-64schedules is configured, then the control will force the num-ber back to 1. Make sure the value is set to 1 to use a localschedule.2. Enter the Time Clock mode. Scroll down to the LOCALTIME SCHEDULE (SCH.L) sub-mode, and pressENTER. Period 1 (PER.1) will be displayed.3. Scroll down to the MON.1 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 through therest of the days and apply schedule 1 where desired. Theschedule 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, in24-hour (military) time. Press ENTER and hour value issaved 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 schedule isneeded, such as for weekends or holidays, scroll down andrepeat the entire procedure for period 2 (PER.2). If addi-tional schedules are needed, repeat the process for as manyas are needed. Eight schedules are provided. See Table 5for an example of setting the schedule.