Carrier 48/50PD05 manual Indoor Air Quality IAQ

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48/50PD

a.(Configuration→ECON→UEFC = 0) - Disabled When UEFC = 0, unoccupied free cooling is disabled. Cooling will only occur if the space exceeds the unoccupied setpoints.

b.(Configuration→ECON→UEFC = 1) - Unoccupied When UEFC is set to 1, unoccupied free cooling can occur throughout the entire unoccupied period. The space temperature must be higher then the mid-point between the occupied cooling and heating set points.

c.(Configuration→ECON→UEFC = 2) - Preoccupancy When UEFC is set to 2, unoccupied free cooling can only occur when the time until the next occupied period is less than the Free Cool PreOcc Time (FC.TM) in minutes.

2.Free Cool PreOcc Time (Configuration→ECON→FC.TM)

FC.TM is the configuration that determines how many minutes before occupancy that free cooling can occur when set for Preoccupancy (UEFC = 2).

3.1.Free Cool Low Temp Limit (Configuration→ECON→FC.LO)

Unoccupied free cooling cannot occur if the Outdoor Air Temperature (Temperature→ AIR.T→ OAT) is less than FC.LO.

Power Exhaust

To enable power exhaust set Power Exhaust Installed (Configuration→ECON→PE.EN) to YES. On the 48/50PD-05 and 06 size units both power exhaust fans are wired together and are controlled by the configuration Power Exhaust Stage1 CFM (Configuration→ECON→PE1.C). When the Indoor Fan Max Speed CFM (Configuration→ECON→IDF.C) is set to the correct supply duct CFM (either by fan tables or air balance report) the control will calculate the outside air CFM based on outside air

damper position and Commanded Fan Speed (Outputs→FANS→F.SPD) to turn on the power exhaust when the calculated outside air CFM reaches Power Exhaust Stage1 CFM (Configuration→ECON→PE1.C). The power exhaust will turn off when the calculated outside air CFM falls below Power Exhaust Stage1 CFM (Configuration→ECON→PE1.C). The Power Exhaust Stage2 CFM (Configuration→ECON→PE2.C) is not currently used on the 48/50PD-05 and 06 units.

Indoor Air Quality (IAQ)

The ComfortLink TM control has the capability for several methods of demand ventilation control. Indoor air quality is typically measured using a CO2 sensor whose measurements are displayed in parts per million (ppm). Outdoor air quality may be measured with a CO2 sensor for indoor-outdoor differential demand ventilation control, or with other sensor types for the outdoor air lockout function. The factory-installed indoor air quality CO2 sensor is mounted in the return section. A field-installed indoor air quality CO2 sensor may be mounted in the return or directly in the occupied space, per job requirements. The indoor air quality modes of operation can be affected by the IAQ Analog Input Config (Configuration→ AIR.Q→ IA.CF), IAQ Switch Input Config (Configuration→ AIR.Q→ IA.CF), OAQ Analog Input Config (Configuration→ AIR.Q→ OA.CF) and other related fan and limit configurations as described below.

IAQ (Analog Input)

The ComfortLink TM control is configured for indoor air quality sensors which provide 4 to 20 mA signal for 0 to 2000 ppm CO2. If the sensor being used has a different range, the ppm display range must be reconfigured by entering new values for the IAQ Sensor Value at 4mA (Configuration→AIR.Q→I.4M) and IAQ Sensor Value at 20mA (Configuration→AIR.Q→I.20M).

IA.CF = 0 (No IAQ)

IA.CF = 0 signifies that there is no IAQ sensor installed. The damper will operate at the Econ Min at Max Fan Speed

(Configuration→ECON→MP.MX) when the fan is at Supply Fan Maximum Speed (Configuration→UNIT→FS.MX) and the damper position will vary at other fan speeds as described in the Cooling Mode with Economizer section below when the space is occupied and the indoor fan is on.

IA.CF = 1 (DCV)

When IA.CF = 1 the IAQ algorithm is set for Demand Control Ventilation (DCV). During DCV, the damper modulates between two user configurations depending upon the relationship between the Indoor Air Quality (IAQ) and the Outdoor Air Quality (OAQ). The lower of these two positions is referred to as the Econo Min IAQ Position (Configuration→AIR.Q→AQ.MN) while the higher is referred to as the Econ Min at Max Fan Speed (Configuration→ECON→MP.MX). The Econo Min IAQ Position (Configuration→AIR.Q→AQ.MN) should be set to an economizer position that brings in enough fresh air to remove contaminates and CO2 generated by sources other than people.

The Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) should be set to an economizer position that brings in fresh air to remove contaminates and CO2 generated by all sources including people when the indoor fan is operating at the Supply Fan Maximum Speed (Configuration→UNIT→FS.MX). The Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) value is the design value for maximum occupancy.

The ComfortLink TM control will begin to open the damper from the Econo Min IAQ Position (Configuration→AIR.Q→AQ.MN) position when the IAQ level begins to exceed the Outdoor Air Quality (OAQ) level by a configurable amount. This amount is

referred to as AQ Differential Low

(Configuration→AIR.Q→AQD.L). When the differential between IAQ and OAQ reaches AQ Differential High (Configuration→AIR.Q→AQD.H), the economizer position will be at the Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) when the indoor fan speed is

at Supply Fan Maximum Speed

(Configuration→UNIT→FS.MX). When the IAQ/OAQ

differential is between AQ Differential Low (Configuration→AIR.Q→AQD.L) and AQ Differential High (Configuration→AIR.Q→AQD.H), the control will modulate the damper between Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) and Econo Min IAQ Position (Configuration→AIR.Q→AQ.MN) in a linear manner as shown in Figure 3. At other fan speeds the economizer damper will operate in the shaded area between the two economizer position curves but at the actual fan speed as indicated by Commanded Fan Speed (Outputs→FANS→F.SPD).

IA.CF = 2 (Override IAQ)

When IA.CF = 2, the IAQ algorithm maintains the damper at Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) when the indoor fan speed is at Supply Fan Maximum Speed (Configuration→UNIT→FS.MX) or in the shaded area of Figure 3 when the indoor fan speed is at the Commanded Fan Speed (Outputs→FANS→F.SPD) until the override condition triggers. The override triggers when the IAQ/OAQ differential is greater than AQ Differential High (Configuration→AIR.Q→AQD.H). The IAQ Override Position (Configuration→AIR.Q→OVR.P). The economizer damper will return to the Econ Min at Max Fan Speed (Configuration→ECON→MP.MX) or MP.MX curve at other fan speeds when the IAQ/OAQ differential is less than the AQ Differential Low (Configuration→AIR.Q→AQD.L).

The override algorithm will operate whenever the building is occupied and the indoor fan is operating or whenever the IAQ algorithm has caused the indoor fan to operate. The IAQ Analog Fan Config (Configuration→AIR.Q→IA.FN) determines whether or not the IAQ algorithm can turn on the indoor fan.

If the indoor fan is not operating, the economizer position will be zero. If the override is not active and the building is unoccupied, the economizer position will be zero. The damper position may

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Contents Table of Contents Safety Considerations What to do if you smell gasGeneral Basic Control UsageSystem Pilott and Touch Pilot Devices Scrolling Marquee Mode and Menu Display StructureCCN Tables and Display START-UP Power Supply Internal WiringEvaporator Fan Condenser Fans and MotorsControls Quick SET-UP Accessories CCN CommunicationSetting an Occupied Time Schedule Weekdays Only for 730 to Fan StatusFilter Status TimeclockService Test Programming Operating SchedulesIndependent Outputs Fan TestThird Party Control Controls OperationUnit Configuration ModesGeneral Operating Sequence Occupancy DeterminationCompressor Operation Indoor Fan OperationEconomizer Operation Outdoor Fan OperationUnoccupied Free Cooling Indoor Air Quality IAQ Cooling Modes Cool Supply Air Set Point Ventilation Mode For all units with EconomizersFor units with Enthalpy Control Demand Control VentilationHeating Modes Supply-Air Temperature Sensor SAT Gas Heat Start-UpTemperature Compensated Start Setting Up the SystemTemp Comp Strt Cool Factr TCS.C Temp Comp Strt Heat Factr TCS.HCarrier Comfort Network Ccnr Configuration Demand LimitTroubleshooting Alarm HandlingRestart Procedure Complete Unit StoppageAlarms and Alerts Communication FailuresAlert Code T073 Outdoor Air Temperature Thermistor Failure Alert Code T074 Space Temperature Thermistor FailureAlert Code T075 Supply Air Temperature Thermistor Failure Alarm Code A154 Serial Eeprom Hardware FailureAlarm Code T155 Serial Eeprom Storage Failure Error Alarm Code A156 Critical Serial Eeprom Storage Fail ErrorAlarm Code A200 Linkage Timeout Comm Failure Alarm Code A404 Fire ShutdownAlert Code T415 IAQ Input Out of Range Alert Code T416 OAQ Input Out of RangeComfortLink Alarm Codes Cooling Troubleshooting Digital Scroll Controller DSC Troubleshooting Cooling Service AnalysisFlash Code 4 ⎯ Locked Rotor DSC Red LED Flash CodesEconomizer Troubleshooting Economizer Service AnalysisVariable Frequency Drive VFD Troubleshooting Heating TroubleshootingPhase Loss Protection IGC Service Analysis Logic IGC Board LED Alarm Codes Electric Heat Service AnalysisLED FlashThermistor Troubleshooting Air TemperaturesRefrigerant Temperatures Thermistor/Temperature Sensor CheckForcing Inputs and Outputs Transducer TroubleshootingSensor Trim Temp Voltage Resistance Drop Temp Voltage Resistance Temp F Drop Degree C Degree F Major System Components GeneralPressure Voltage Psig48PD Control Wiring Schematic 50PD Control Wiring Schematic 48/50PD Power Wiring Schematic and Legend Typical Unit Component Arrangement Setting Main Base Board MBBMBB Connections FIL.SCenter of the board. Do not change this setting Economizer Control Board ECBECB Connections RM.OCModulation Board AUX1 CommunicationDigital Scroll Control Board DSC CMP.AVariable Frequency Drive VFD Variable Frequency Drive VFDIntegrated Gas Control IGC Board Integrated Gas Control IGC BoardLow Voltage Terminal Strip TB1Accessory Navigatort Display Field-Installed AccessoriesScrolling Marquee Display Carrier Comfort Network Ccnr InterfaceSpace Temperature Sensor T-58 Space Temperature Sensor AveragingSpace Temperature Sensor Averaging Service Cleaning Coil Maintenance and Cleaning RecommendationPeriodic Clean Water Rinse Routine Cleaning of Round-Tube Coil SurfacesCondensate Drain Pan FiltersOutdoor-Air Inlet Screens Main Burner 48PDEvaporator Fan Performance Adjustment Evaporator Fan Service and ReplacementLubrication Variable Frequency Drive VFD Replacement Evaporator Fan Belt Tension AdjustmentCondenser-Fan Adjustment Economizer Operation During Power Failure Verify Sensor PerformanceEvacuation Refrigerant ChargeGas Valve Adjustment PuronR RefrigerantAltitude Compensation 48PG03-07 Elevation Natural GAS PropaneHigh Altitude Main BurnersFilter Drier Protective DevicesReplacement Parts Diagnostic LEDsRelief Devices Compressor Sound ShieldMode RUN Status Appendix a Local Display and CCN TablesStrt Alrmdisp = CCNOnly Generic = CCNMode Temperatures Mode Service TestMode Pressures Mode SET Points Mode InputsMode Outputs OutputsMode Configuration HT.TY HTRMRT.H MOT.HIA.CF IA.FNII.CF II.FNTrim SPT.CSPT.T SAT.CMode Time Clock CCN only TablesMode Operating Modes OK.HT ACT.HEN.LO AQ.DVMode Alarms Expansion Range Default CCN CCN Point CCN WriteExpansion Range Units TABLE/SUB---TABLE StatusAppendix B VFD Information VFD Terminal DesignationsVFD Configurations Standard Display Mode VFD OperationVFD Modes Start Up with AssistantParameters Mode Start-Up Assistant ModeChanged Parameters Mode Drive Parameter Backup ModeVFD Diagnostics VFD Maintenance Correcting AlarmsHistory Heat Sink101---105 Fault Codes201---206 1000 10011002 1003Maintenance Intervals Alarm CodesMaintenance Interval Control Panel Cleaning Main Fan ReplacementBattery Replacement Appendix C START-UP Data Fan Performance 48PDD05 Vertical UnitsFan Performance 48PDE05 Vertical Units AirflowFan Performance 48PDD06 Vertical Units Fan Performance 48PDE06 Vertical Units Rpm Bhp 1500Available External Static Pressure in. wg CFMFan Performance 48PDE05 Horizontal Units Fan Performance 48PDD05 Horizontal UnitsBhp Rpm Fan Performance 48PDD06 Horizontal Units 1026 1086 1144 1199 1253Fan Performance 48PDE06 Horizontal Units Fan Performance 50PD05 Vertical Units Fan Performance 50PD06 Vertical UnitsFan Performance 50PD05 Horizontal Units Bhp Rpm 1500General Notes for FAN Performance Data Tables Appendix D Additional START-UP Data Control SET Point and Configuration LOG Indicate Unit Settings belowCCN Point Entry 103 104 Unit START-UP Checklist PRE-START-UP106

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.
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