Carrier 48/50PD05 manual Service

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Carrier Accessory Kits

There are specific accessory kits sold for various field installed accessories. These kits vary based on model, size, voltage, manufacture date, and duct orientation. Some of these kits include Economizer, Power Exhaust, and Electric Heat. Refer to the Controls Quick Set-Up section for configuration and more information on these accessories.

Two-Position Damper

The two-position outdoor air damper accessory usage depends on model size and return duct orientation. This accessory wires directly into the low voltage circuit for the indoor fan control. No other control configuration is needed.

Indoor Air Quality

The indoor air quality (IAQ) sensor (part no. 33ZCSENCO2) is a field-installed accessory which measures CO2 levels in the air. When installing this sensor, an ECB board must be installed and the unit must be configured for IAQ use by setting ConfigurationAIR.QIA.CF to a value of 1, 2, or 3. See the Indoor Air Quality section for more information.

TB1-2 . . . . . . . 4-20 mA Input

TB1-3 . . . . . . . Sensor Common

TB1-R . . . . . . 24 VAC Output

TB1-C . . . . . . Common (GND)

Outdoor Air Quality

The outdoor air quality (OAQ) sensor is a field-installed accessory that measures CO2 levels in the air. When installing this sensor, an ECB board must be installed and the unit must be configured for OAQ use by setting ConfigurationAIR.QOA.CF to a value of 1 or 2. See the Indoor Air Quality section for more information.

TB1-4 . . . . . . . 4-20 mA Input

TB1-3 . . . . . . . Sensor Common

TB1-R . . . . . . 24 VAC Output

TB1-C . . . . . . Common (GND)

Smoke Detectors

The smoke detectors are field-installed accessories. These detectors can detect smoke in either the return air (part no. CRSMKDET003A00) or supply and return air (part no. CRSMKSUP002A00). When installing either detector, the unit must be configured for fire shutdown by setting ConfigurationUNITFS.SW to normally open (1) or normally closed (2).

TB1-Fire Shutdown-1 . . . . Dry Contact Source TB1-Fire Shutdown-2 . . . . Discrete Input to Board TB1-R . . . . . . . . . . . . . . . . 24 VAC Output TB1-C . . . . . . . . . . . . . . . . Common (GND)

Filter Status

The filter status accessory (part no. CRSTATUS002B00) is a field-installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting ConfigurationUNITFL.SW to normally open (1) or normally closed (2). Normally open (1) is the preferred configuration. Filter status wires are pre-run in the unit harness and located near the switch installation location. Refer to the Filter Accessory Installation Instructions for more information.

Fan Status

The fan status accessory (part no. CRSTATUS003B00) is a field-installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be

configured for fan status by setting ConfigurationUNITFN.SW to normally open (1) or normally closed (2). Normally open (1) is the preferred configuration. Fan status wires are pre-run in the unit harness and located near the switch installation location. Refer to the Fan Accessory Installation Instructions for more information.

IMPORTANT: The Fan Status terminals on TB1 are NOT to be used.

Enthalpy Sensors

The enthalpy accessories (part no. CRENTSNG002A00 and CRENTDIF002A00) are field-installed accessories. The first accessory (outdoor air only) determines when the enthalpy is low relative to a fixed reference. Adding the second accessory (return air) compares the enthalpy between the outdoor and return airstreams. In each case, the enthalpy 4 to 20 mA signals are converted to a switch output which is read by the ECB. When installing this accessory, the unit must be configured for

enthalpy-based control by setting ConfigurationECONEN.SW to normally open (1). Normal status is an active switch which tells the control that enthalpy is LOW. The actual switch terminal LOW is normally closed. Refer to the Enthalpy Kit Installation Instructions for more information on its installation.

Return/Supply Air Temperature Sensor

The temperature sensor (part no. 33ZCSENSAT) is a field-installed accessory which may be installed on the common return air duct and/or the common supply air duct near the unit. The duct supply air temperature (SAT) may be used to replace the SAT sensor that is internal to the unit. A supply duct SAT measurement is valid for heating mode display while the factory-standard internal SAT is not valid for heating due to its location upstream of the heating section. When installing the supply duct SAT, the unit must be configured by setting ConfigurationUNITSAT.H to ENBL. A SAT sensor in the supply duct is the preferred configuration for systems with Carrier variable volume and temperature (VVT) accessory controls.

Space Humidistat

The Space Humidistat (part no. --HL--38MG-029) is a wall mounted device with an adjustable setpoint to control humidity levels. The humidistat input is provided on the field connection terminal board. The Space Humidity Switch configuration, ConfigurationUNITRH.SW, identifies the normally open or normally closed status of this input at LOW humidity.

TB1-R . . . . . . 24 VAC Dry Contact Source TB1-W2 . . . . . Discrete Input to Board

Space Humidity Sensor

The space relative humidity sensor (part no. 33ZCSENDRH-01 duct mount or 33ZCSENSRH-01 wall mount) is a field-installed accessory. The space relative humidity (RHS) may be selected for use if the outdoor air quality sensor (OAQ) is not used and an economizer board is installed. When installing the relative humidity sensor, the unit must be configured by setting ConfigurationUNITRH.S to YES.

TB1-1 . . . . . . . 24 VDC Loop Power

TB1-4 . . . . . . . 4-20 mA Input Signal

SERVICE

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, turn off main power switch to unit and install lockout tag. Ensure electrical service to rooftop unit agrees with voltage and amperage listed on the unit rating plate.

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Contents Table of Contents What to do if you smell gas Safety ConsiderationsBasic Control Usage GeneralCCN Tables and Display Scrolling Marquee Mode and Menu Display StructureSystem Pilott and Touch Pilot Devices START-UP Condenser Fans and Motors Power SupplyInternal Wiring Evaporator FanControls Quick SET-UP CCN Communication AccessoriesTimeclock Setting an Occupied Time Schedule Weekdays Only for 730 toFan Status Filter StatusFan Test Service TestProgramming Operating Schedules Independent OutputsControls Operation Third Party ControlModes Unit ConfigurationOccupancy Determination General Operating SequenceIndoor Fan Operation Compressor OperationUnoccupied Free Cooling Outdoor Fan OperationEconomizer Operation Indoor Air Quality IAQ Cooling Modes Cool Supply Air Set Point Demand Control Ventilation Ventilation ModeFor all units with Economizers For units with Enthalpy ControlHeating Modes Gas Heat Start-Up Supply-Air Temperature Sensor SATTemp Comp Strt Heat Factr TCS.H Temperature Compensated StartSetting Up the System Temp Comp Strt Cool Factr TCS.CDemand Limit Carrier Comfort Network Ccnr ConfigurationComplete Unit Stoppage TroubleshootingAlarm Handling Restart ProcedureCommunication Failures Alarms and AlertsAlarm Code A154 Serial Eeprom Hardware Failure Alert Code T073 Outdoor Air Temperature Thermistor FailureAlert Code T074 Space Temperature Thermistor Failure Alert Code T075 Supply Air Temperature Thermistor FailureAlarm Code A404 Fire Shutdown Alarm Code T155 Serial Eeprom Storage Failure ErrorAlarm Code A156 Critical Serial Eeprom Storage Fail Error Alarm Code A200 Linkage Timeout Comm FailureAlert Code T416 OAQ Input Out of Range Alert Code T415 IAQ Input Out of RangeComfortLink Alarm Codes Cooling Troubleshooting Cooling Service Analysis Digital Scroll Controller DSC TroubleshootingDSC Red LED Flash Codes Flash Code 4 ⎯ Locked RotorEconomizer Service Analysis Economizer TroubleshootingPhase Loss Protection Heating TroubleshootingVariable Frequency Drive VFD Troubleshooting IGC Service Analysis Logic Flash IGC Board LED Alarm CodesElectric Heat Service Analysis LEDThermistor/Temperature Sensor Check Thermistor TroubleshootingAir Temperatures Refrigerant TemperaturesSensor Trim Transducer TroubleshootingForcing Inputs and Outputs Temp Voltage Resistance Drop Temp Voltage Resistance Temp F Drop Degree C Degree F Psig Major System ComponentsGeneral Pressure Voltage48PD Control Wiring Schematic 50PD Control Wiring Schematic 48/50PD Power Wiring Schematic and Legend Typical Unit Component Arrangement Main Base Board MBB SettingFIL.S MBB ConnectionsEconomizer Control Board ECB Center of the board. Do not change this settingRM.OC ECB ConnectionsCommunication Modulation Board AUX1CMP.A Digital Scroll Control Board DSCVariable Frequency Drive VFD Variable Frequency Drive VFDIntegrated Gas Control IGC Board Integrated Gas Control IGC BoardTB1 Low Voltage Terminal StripCarrier Comfort Network Ccnr Interface Accessory Navigatort DisplayField-Installed Accessories Scrolling Marquee DisplaySpace Temperature Sensor Averaging Space Temperature Sensor T-58Space Temperature Sensor Averaging Service Routine Cleaning of Round-Tube Coil Surfaces CleaningCoil Maintenance and Cleaning Recommendation Periodic Clean Water RinseMain Burner 48PD Condensate Drain PanFilters Outdoor-Air Inlet ScreensLubrication Evaporator Fan Service and ReplacementEvaporator Fan Performance Adjustment Condenser-Fan Adjustment Evaporator Fan Belt Tension AdjustmentVariable Frequency Drive VFD Replacement Refrigerant Charge Economizer Operation During Power FailureVerify Sensor Performance EvacuationElevation Natural GAS Propane Gas Valve AdjustmentPuronR Refrigerant Altitude Compensation 48PG03-07Protective Devices High AltitudeMain Burners Filter DrierCompressor Sound Shield Replacement PartsDiagnostic LEDs Relief DevicesAppendix a Local Display and CCN Tables Mode RUN StatusGeneric = CCN StrtAlrmdisp = CCN OnlyMode Pressures Mode Service TestMode Temperatures Mode Inputs Mode SET PointsOutputs Mode OutputsMode Configuration MOT.H HT.TYHTR MRT.HII.FN IA.CFIA.FN II.CFSAT.C TrimSPT.C SPT.TCCN only Tables Mode Time ClockMode Operating Modes AQ.DV OK.HTACT.H EN.LOTABLE/SUB---TABLE Status Mode AlarmsExpansion Range Default CCN CCN Point CCN Write Expansion Range UnitsVFD Terminal Designations Appendix B VFD InformationVFD Configurations Start Up with Assistant Standard Display ModeVFD Operation VFD ModesDrive Parameter Backup Mode Parameters ModeStart-Up Assistant Mode Changed Parameters ModeVFD Diagnostics Heat Sink VFD MaintenanceCorrecting Alarms History201---206 Fault Codes101---105 1003 10001001 1002Maintenance Interval Alarm CodesMaintenance Intervals Battery Replacement Main Fan ReplacementControl Panel Cleaning Airflow Appendix C START-UP DataFan Performance 48PDD05 Vertical Units Fan Performance 48PDE05 Vertical UnitsFan Performance 48PDD06 Vertical Units CFM Fan Performance 48PDE06 Vertical UnitsRpm Bhp 1500 Available External Static Pressure in. wgBhp Rpm Fan Performance 48PDD05 Horizontal UnitsFan Performance 48PDE05 Horizontal Units 1026 1086 1144 1199 1253 Fan Performance 48PDD06 Horizontal UnitsFan Performance 48PDE06 Horizontal Units Fan Performance 50PD06 Vertical Units Fan Performance 50PD05 Vertical UnitsBhp Rpm 1500 Fan Performance 50PD05 Horizontal UnitsGeneral Notes for FAN Performance Data Tables Appendix D Additional START-UP Data Indicate Unit Settings below Control SET Point and Configuration LOGCCN Point Entry 103 104 PRE-START-UP Unit START-UP Checklist106

48/50PD05 specifications

The Carrier 48/50PD05 is a remarkable addition to Carrier's lineup of rooftop units, offering advanced cooling and heating solutions for commercial applications. Designed for medium-sized buildings, this unit is well-suited for both new installations and as a replacement for older systems, thanks to its versatile features and efficient performance.

One of the standout features of the 48/50PD05 is its energy efficiency. It incorporates state-of-the-art technology to achieve high Seasonal Energy Efficiency Ratios (SEER) and EER ratings, reducing operational costs while delivering superior comfort. The unit is also compliant with the latest energy regulations, making it an environmentally friendly choice for building owners concerned about sustainability.

The 48/50PD05 is equipped with a highly efficient scroll compressor, which not only enhances performance but also contributes to quiet operation. This is a significant advantage in commercial spaces where noise levels need to be kept in check for comfort and productivity. Additionally, the unit includes advanced airflow design, ensuring even distribution of conditioned air throughout the space.

Technologically, the Carrier 48/50PD05 features Carrier's Infinity Control system, which allows for precise control of indoor climate. This intelligent control mechanism can be integrated with smart building management systems, enabling users to monitor and manage energy use effectively. Wi-Fi connectivity is also available, providing remote access for real-time adjustments and diagnostics.

Durability is another characteristic of the 48/50PD05. Constructed with high-quality materials, the unit withstands various environmental conditions, ensuring longevity and reliability. Moreover, the modular design facilitates easy maintenance, making service procedures efficient and cost-effective.

In addition to cooling, the Carrier 48/50PD05 offers heating capabilities, often utilizing gas or electric heating options that can be tailored to the specific needs of a building. The unit can also be equipped with integrated economizers, allowing for free cooling during suitable outdoor conditions, further enhancing energy savings.

Overall, the Carrier 48/50PD05 stands out as a high-performance HVAC solution that combines efficiency, technology, and durability. It provides building owners with a versatile tool to ensure comfort while minimizing their environmental footprint. With a strong emphasis on energy savings and advanced control features, this rooftop unit is a smart investment for any commercial property.