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 27 page image

27CONTROLS QUICK STARTThe following section will provide a quick user guide to set-ting up and configuring the N Series units with ComfortLinkcontrols. See Basic Control Usage section on pages 4 and 5 forinformation on operating the control.Variable Air Volume Units Using Return AirSensor or Space Temperature Sensor — Toconfigure the unit, perform the following:1. The type of control is configured under ConfigurationUNITC.TYP. Set C.TYP to 1 (VAV-RAT) for returnair sensor. Set C.TYP to 2 (VAV-SPT) for space tempera-ture sensor.NOTE: For VAV with a space sensor (VAV-SPT), underConfigurationUNITSENSSPT.S, enable thespace sensor by setting SPT.S to ENBL.NOTE: Refer to the section on static pressure control for infor-mation on how to set up the unit for the type of supply fan con-trol desired.2. The space temperature set points and the supply air setpoints are configured under the Setpoints menu. Theheating and cooling set points must be configured. Seethe Heating Control and Cooling Control sections for fur-ther description on these configurations. Configure thefollowing set points:Also configure the following points in the Configura-tionBPD.LV.T menu:3. To program time schedules, make sure SCH.N=1 underConfigurationIAQSC.OVSCH.N to configurethe control to use local schedules.4. Under the Time ClockSCH.L submenu, enter the de-sired schedule. See Time Clock section for furtherdescriptions of these configurations.5. Under ConfigurationSPSP.SP, the Supply DuctStatic Pressure set point should be configured.6. If supply air temperature reset is desired, under theConfigurationEDT.R submenu, the following setpoints should be configured:This applies to both TSTAT MULTI and SENSORMULTI modes.NOTE: Configure either RTIO and LIMT or RES.S. All threeare not used.7. See the Economizer Configurations section for additionaleconomizer option configurations.8. See the Exhaust Configurations section for addition ex-haust option configurations.Multi-Stage Constant Volume and Staged AirVolume Units with Mechanical Thermostat —To configure the unit, perform the following:1. Under ConfigurationUNITC.TYP, set C.TYP to 3(TSTAT MULTI). See the Economizer Configurationssection for additional economizer option configurations.2. Under the Setpoints menu, set the followingconfigurations:See the Exhaust Configurations section for additional ex-haust option configurations.Multi-Stage Constant Volume and Staged AirVolume Units with Space Sensor — To configurethe unit, perform the following:1. Under ConfigurationUNITC.TYP, set C.TYP to 4(SPT MULTI).2. Under the Setpoints menu, the following configurationsshould be set:3. Under the Setpoints submenu, the heating and cooling setpoints must be configured:4. Under ConfigurationUNITSENSSPT.S, enablethe space sensor by setting SPT.S to ENBL.5. Under ConfigurationUNITFN.MD, set FN.MD to1 for continuous fan or 0 for automatic fan.6. To program time schedules, set SCH.N=1 under Config-urationIAQSC.OVSCH.N to configure the con-trol to use local schedules.7. Under the TimeclockSCH.L submenu, enter the de-sired schedule. See Time Clock section for furtherdescriptions of these configurations.8. See the Economizer Configurations section for additionaleconomizer option configurations.9. See the Exhaust Configurations section for additional ex-haust option configurations.Economizer Configurations — Under the Configu-ration ECON submenu, the following set points should beconfigured:OHSP Occupied Heat Set PointOCSP Occupied Cool Set PointUHSP Unoccupied Heat Set PointUCSP Unoccupied Cool Set PointGAP Heat-cool Set Point GapV.C.ON VAV Occupied Cool On DeltaV.C.OF VAV Occupied Cool Off DeltaL.H.ON Demand Level Low Heat OnL.H.OF Demand Level Low Heat OffRS.CF EDT Reset ConfigurationRTIO Reset RatioLIMT Reset LimitRES.S EDT 4-20 mA Reset InputSA.HI Supply Air Set Point HiSA.LO Supply Air Set Point LoSA.HI Supply Air Set Point HiSA.LO Supply Air Set Point LoOHSP Occupied Heat SetpointOCSP Occupied Cool SetpointUHSP Unoccupied Heat SetpointUCSP Unoccupied Cool SetpointGAP Heat-Cool Setpoint GapD.LV.T Cool/Heat Set Point Offsets (located in theConfiguration menu)EC.EN Economizer Enabled?EC.MN Economizer Min.PositionEC.MX Economizer Maximum PositionE.TRM Economizer Trim for SumZ?E.SEL Econ Changeover SelectOA.E.C OA Enthalpy Change Over SelectOA.EN Outdoor Enthalpy Compare ValueOAT.L High OAT Lockout TempO.DEW OA Dew Point Temp LimitORH.S Outside Air RH SensorCFM.C Outdoor Air CFM ControlE.CFG Economizer Operation Config