Carrier 50PD05 Operating And Service Instructions

Also see for 48PD05: User manual User's information manual Installation instructions

Carrier Accessory KitsThere are specific accessory kits sold for various field installedaccessories. These kits vary based on model, size, voltage,manufacture date, and duct orientation. Some of these kits includeEconomizer, Power Exhaust, and Electric Heat. Refer to theControls Quick Set-Up section for configuration and moreinformation on these accessories.Two-Position DamperThe two-position outdoor air damper accessory usage depends onmodel size and return duct orientation. This accessory wiresdirectly into the low voltage circuit for the indoor fan control. Noother control configuration is needed.Indoor Air QualityThe indoor air quality (IAQ) sensor (part no. 33ZCSENCO2) is afield-installed accessory which measures CO2 levels in the air.When installing this sensor, an ECB board must be installed andthe unit must be configured for IAQ use by settingConfiguration-+AIR.Q-+IA.CF to a value of 1, 2, or 3. See theIndoor Air Quality section for more information.TB1-2 ....... 4-20 mA InputTB1-3 ....... Sensor CommonTB1-R ...... 24 VAC OutputTB1-C ...... Common (GND)Outdoor Air QualityThe outdoor air quality (OAQ) sensor is a field-installed accessorythat measures ('02 levels in the air. When installing this sensor, anECB board must be installed and the unit must be configured forOAQ use by setting Configuration-+AIR.Q-+OA.CF to a valueof I or 2. See the Indoor Air Quality section for more information.TBI-4 ....... 4-20 mA InputTBI-3 ....... Sensor CommonTB1-R ...... 24 VAC OutputTB1-C ...... Common (GND)Smoke DetectorsThe smoke detectors are field-installed accessories. These detectorscan detect smoke in either the return air (part no.CRSMKDET003A00) or supply and return air (part no.CRSMKSUP002A00). When installing either detector, the unitmust be configured for fire shutdown by settingConfiguration-+UNIT-+FS.SW to normally open (1) or normallyclosed (2).TB1-Fire Shutdown-1 .... Dry Contact SourceTB1-Fire Shutdown-2 .... Discrete Input to BoardTB1-R ................ 24 VAC OutputTB1-C ................ Common (GND)Filter StatusThe filter status accessory (part no. CRSTATUS002B00) is afield-installed accessory. This accessory detects plugged filters.When installing this accessory, the unit must be configured forfilter status by setting Configuration-+UNIT-+FL.SW tonormally open (1) or normally closed (2). Normally open (1) is thepreferred configuration. Filter status wires are pre-run in the unitharness and located near the switch installation location. Refer tothe Filter Accessory Installation Instructions for more information.Fan StatusThe fan status accessory (part no. CRSTATUS003B00) is afield-installed accessory. This accessory detects when the indoorfan is blowing air. When installing this accessory, the unit must beconfigured for fan status by settingConfiguration-+UNIT-+FN.SW to normally open (1) ornormally closed (2). Normally open (1) is the preferredconfiguration. Fan status wires are pre-run in the unit harness andlocated near the switch installation location. Refer to the FanAccessory Installation Instructions for more information.IMPORTANT: The Fan Status terminals on TB1 are NOT to beused.Enthalpv SensorsThe enthalpy accessories (part no. CRENTSNG002A00 andCRENTDIF002A00) are field-installed accessories. The firstaccessory (outdoor air only) detemfines when the enthalpy is lowrelative to a fixed reference. Adding the second accessory (returnair) compares the enthalpy between the outdoor and returnairstreams. In each case, the enthalpy 4 to 20 mA signals areconverted to a switch output which is read by the ECB. Wheninstalling this accessory, the unit must be configured forenthalpy-based control by settingConfiguration-+ECON-+EN.SW to normally open (1). Normalstatus is an active switch which tells the control that enthalpy isLOW. The actual switch terminal LOW is normally closed. Referto the Enthalpy Kit Installation Instructions for more informationon its installation.Return/Supply Air Temperature SensorThe temperature sensor (part no. 33ZCSENSAT) is a field-installedaccessory which may be installed on the common return air ductand/or the common supply air duct near the unit. The duct supplyair temperature (SAT) may be used to replace the SAT sensor thatis internal to the unit. A supply duct SAT measurement is valid forheating mode display while the factory-standard internal SAT isnot valid for heating due to its location upstream of the heatingsection. When installing the supply duct SAT, the unit must beconfigured by setting Configuration--+UNIT--+SATJI to ENBL.A SAT sensor in the supply duct is the preferred configuration forsystems with Carrier variable volume and temperature (VVT®)accessory controls.Space HumidistatThe Space Humidistat (part no. --HL--38MG-029) is a wallmounted device with an adjustable setpoint to control humiditylevels. The humidistat input is provided on the field connectionterminal board. The Space Humidity Switch configuration,Configuration-_UNIT-_RH.SW, identifies the normally open ornormally closed status of this input at LOW humidity.TB1-R ...... 24 VAC Dry Contact SourceTB1-W2 ..... Discrete Input to BoardSpace Humidity SensorThe space relative humidity sensor (part no. 33ZCSENDRH-01duct mount or 33ZCSENSRH-01 wall mount) is a field-installedaccessory. The space relative humidity (RHS) may be selected foruse if the outdoor air quality sensor (OAQ) is not used and aneconomizer board is installed. When installing the relativehumidity sensor, the unit must be configured by settingConfiguration -_UNIT-_RH.S to YES.TBI-1 ....... 24 VDC Loop PowerTB1-4 ....... 4-20 mA Input SignalSERVICEELECTRICALSHOCK HAZARDFailure to follow this warning could cause personaliniury or death.Before performing service or maintenance operationson unit, turn off main power switch to unit and installlockout tag. Ensure electrical service to rooftop unitagrees with voltage and amperage listed on the unitrating plate.59