Carrier 48/50PD05 manual For all units with Economizers, For units with Enthalpy Control

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For all units with Economizers:

1.1.The outdoor temperature is below the Econo Cool Hi Temp Limit (ConfigurationECONEH.LO) and above

the Econo Cool Lo Temp Limit (ConfigurationECONEL.LO).

For units with Enthalpy Control

2.1.The outdoor enthalpy is low and the outdoor temperature is below the Econo Cool Hi Temp Limit (ConfigurationECONEH.LO) and above the Econo Cool Lo Temp Limit (ConfigurationECONEL.LO).

If the conditions above are true and the economizer is available for cooling the economizer outside air and return air dampers will modulate to allow proportions of outside air and return air to mix and produce a temperature equal to the Cool Supply Air Set Point (SetpointSASP). If reset is applied to the Supply Air Temperature Set Point (SetpointSASP) the dampers will control to the Supply Air Control Point (Run StatusCOOLSA.CP).

If the conditions above are true but the economizer dampers are not able to satisfy the Cool Supply Air Set Point (SetpointSASP) with Reset (if applied), the compressor will turn on and modulate to provide additional cooling to satisfy the Cool Supply Air Set Point (SetpointSASP) with Reset if applied.

If the conditions above are not true, the economizer will move to a user Configurable Econ Min at Max Fan Speed (ConfigurationECONMP.MX) where the minimum economizer damper position is based on the Supply Fan Maximum Speed (ConfigurationUNITFS.MX). This is done to maintain a constant airflow through the economizer by opening the dampers more as the indoor fan speed is reduced or closing the dampers more as the indoor fan speed increases.

The shape of the Economizer Minimum Position vs. Fan Speed curve is determined by the configuration parameters: Econ Min at 25% Fan speed (ConfigurationECONMP.25), Econ Min at 50% Fan speed (ConfigurationECONMP.50), Econ Min at 75% Fan speed (ConfigurationECONMP.75) and Econ Min at Max Fan speed (ConfigurationECONMP.MX).

The Econ Min at 25% Fan speed (ConfigurationECONMP.25), Econ Min at 50% Fan speed

(ConfigurationECONMP.50) and Econ Min at 75% Fan speed (ConfigurationECONMP.75) damper positions are calculated based on the Econ Min at Max Fan Speed (ConfigurationECONMP.MX) and Supply Fan Maximum Speed (ConfigurationUNITFS.MX).

The Econ Min at 25% Fan speed (ConfigurationECONMP.25), Econ Min at 50% Fan speed

(ConfigurationECONMP.50) and Econ Min at 75% Fan speed (ConfigurationECONMP.75) damper position are user configurable and can be determined by setting the fan speed at 25, 50 and 75% and determining the damper position required to maintain the Econ Min at Max Fan Speed (ConfigurationECONMP.MX) Outside air CFM through the economizer outside air dampers. The default calculations programmed into the PD controls is based on a side shot economizer at 400 CFM/TON Supply Air flow with negative 0.25 in H2O pressure in the return duct.

Econ Min at Max fan Speed (ConfigurationUNITFS.MN) is set by user based on minimum required outside air ventilation CFM required for the application. This procedure would be the same as if this were a CV unit with the unit running at the design point CFM. This determines the minimum position amount of outside air CFM required when the fan is running at maximum speed.

Configure the Indoor Fan Max Speed CFM (ConfigurationECONIDF.C) either to the supply CFM determined from the fan performance tables or air balance reports. If using fan performance tables make corrections for all installed accessory pressure loss and use measured RPM, power and static

pressure readings to determine the actual Indoor Fan Max Speed

CFM (ConfigurationECONIDF.C).

ECON MIN

 

 

 

 

 

 

 

 

48/50PD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AT MAX

 

 

 

 

 

 

 

 

 

 

FANSPEED

 

INCREASINGVENTILATION

 

 

 

 

 

 

 

MINIMUM

 

 

 

 

 

 

 

 

POSITION

 

 

 

 

 

 

 

 

 

(MINP_MAX)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VENTILATION FOR PEOPLE

 

 

 

IAQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DAMPER

 

 

 

 

 

 

 

 

 

POSITION

 

 

VENTILATION FOR SOURCES

 

 

 

(AQ. MN)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

700 INSIDE/OUTSIDE CO2

 

 

 

 

 

 

 

 

DIFFERENTIAL

 

 

 

 

AQ

 

 

AQ

 

 

 

 

DIFFERENTIAL

DIFFERENTIAL

 

 

 

 

LOW (AQD.L)

HIGH (AQD.H)

 

 

 

 

 

 

 

 

 

C09145

Fig. 8 - Economizer Minimum Position

If the indoor fan is not operating, the economizer will be fully closed, 0% open.

Ventilation Mode

If the space temperature falls 0.5F below the Occupied Cool Set Point (SetpointsOCSP) the compressor will turn off, the indoor fan speed will be set to the Vent Mode Fan Speed (ConfigurationUNITFS.VM) and the economizer will open to the position that will supply minimum ventilation air at the

configured Vent Mode Fan Speed (ConfigurationUNITFS.VM). Default Vent Mode Fan Speed

(ConfigurationUNITFS.VM) is 50%. Configuring the Vent Mode Fan Speed (ConfigurationUNITFS.VM) lower will provide additional energy savings in vent mode but may not supply the required ventilation air to the conditioned space at lower fan speeds.

Demand Control Ventilation

The 48PD units can also be equipped with optional CO2 sensors for additional indoor air quality control. When unit is equipped with a return duct CO2 sensor or return duct CO2 sensor and outside air CO2 sensor the Economizer minimum position vs. fan speed curve will be recalculated based on the CO2 level of the return and/or outside air as shown in Fig. 8. See the Indoor Air

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Contents Table of Contents What to do if you smell gas Safety ConsiderationsBasic Control Usage GeneralSystem Pilott and Touch Pilot Devices Scrolling Marquee Mode and Menu Display StructureCCN Tables and Display 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 OperationEconomizer Operation Outdoor Fan OperationUnoccupied Free Cooling 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 TroubleshootingVariable Frequency Drive VFD Troubleshooting Heating TroubleshootingPhase Loss Protection IGC Service Analysis Logic Flash IGC Board LED Alarm CodesElectric Heat Service Analysis LEDThermistor/Temperature Sensor Check Thermistor TroubleshootingAir Temperatures Refrigerant TemperaturesForcing Inputs and Outputs Transducer TroubleshootingSensor Trim 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 ScreensEvaporator Fan Performance Adjustment Evaporator Fan Service and ReplacementLubrication Variable Frequency Drive VFD Replacement Evaporator Fan Belt Tension AdjustmentCondenser-Fan Adjustment 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 Temperatures Mode Service TestMode Pressures 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 History101---105 Fault Codes201---206 1003 10001001 1002Maintenance Intervals Alarm CodesMaintenance Interval Control Panel Cleaning Main Fan ReplacementBattery Replacement 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. wgFan Performance 48PDE05 Horizontal Units Fan Performance 48PDD05 Horizontal UnitsBhp Rpm 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.