Carrier 39L specifications

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HEATING COIL CONTROL Ð The heating coil control ad- justs the steam or hot water valve. Heat is primarily used for morning warm-up or Occupied Heating with the valve modu- lated to maintain desired return-air temperature.

If the supply fan is OFF, the heating valve is modulated to maintain a desired minimum duct temperature (fan off value).

If the fan is ON, the system determines if it is in the morn- ing warm-up mode. If it is, the return-air sensor is read and compared to the Occupied Heating set point. If heating is required, the control calculates the supply-air temperature required to satisfy conditions.

Once the required supply-air temperature has been cal- culated, it is compared to the actual supply-air temperature and the heating coil valve modulates to the required position.

The heat interlock relay is energized whenever there is a need for heat.

Once morning warm-up is completed, heat is activated again unless Occupied Heat has been selected.

During cooling or fan-only operation, heat can also be pro- vided to maintain the supply-air temperature when the amount of cold outside air admitted by the IAQ or OAC controls causes the temperature to fall below the supply-air set point.

CHILLED WATER COIL COOLING CONTROL Ð The cooling coil control adjusts the chilled water valve. The valve is modulated to maintain desired supply-air temperature set point. The valve is held in its normal position whenever the system is in Nighttime Free Cooling or whenever the supply fan is OFF.

If the fan is ON, the control reads the humidity sensor and compares the value to the high humidity limit.

If the humidity is higher than the humidity limit, the chilled water valve fully opens.

If the humidity is below the high humidity limit, or if no humidity sensor is supplied, the control reads the supply-air sensor and computes the supply-air temperature required to satisfy conditions, provided that return-air temperature is greater than the Occupied Cooling set point.

Once the required supply-air temperature has been cal- culated, it is compared to the current supply-air temperature and the chilled water valve modulates to the position re- quired to maintain desired conditions.

See Fig. 77 for cooling operation ¯owchart.

STATIC PRESSURE CONTROL Ð The static pressure con- trol adjusts the inlet guide vanes (IGVs) or the supply-fan motor inverter in a variable air volume system in order to maintain the duct static pressure set point.

If the supply fan is OFF, the IGVs remain closed or the minimum signal is sent to the inverter.

If the fan is ON, the system reads the duct static pressure sensor and computes the static pressure required to satisfy conditions. The system compares the duct static pressure to the computed value and calculates the required signal that is output to the IGV actuator or the inverter.

FAN VOLUME CONTROL Ð Fan volume control adjusts the inlet guide vanes or inverter in a VAV system. The return fan IGVs or inverters are modulated to maintain a constant differential cfm value between the supply and return fans in the system.

If the supply fan is OFF, the return fan inlet guide vanes are closed and no signal is sent to the return fan inverter.

If the supply fan is ON, the control reads the supply fan differential pressure transmitter and computes the supply cfm. The desired return cfm is calculated by subtracting the dif- ferential cfm set point from the calculated supply cfm. The return cfm is read and the return fan differential pressure re- quired to satisfy conditions is calculated.

The calculated return fan differential pressure is com- pared to the current differential pressure. The signal required to satisfy conditions is sent to the return fan inlet guide vane actuator or return fan inverter.

DIRECT EXPANSION COOLING CONTROL Ð The di- rect expansion (DX) cooling control regulates the DX cool- ing system. The DX cooling stages are energized and deen- ergized to maintain the desired supply-air temperature set point. Whenever the system is in Nighttime Free Cooling mode or whenever the supply fan is off, the DX cooling stages remain off.

If the supply fan is on, the control reads the humidity sen- sor (if supplied) and compares the value to the high humid- ity limit. If the humidity is higher than the high humidity limit, the DX cooling stages are energized to maintain a mini- mum supply-air temperature. If the humidity is below the limit, the control reads the space temperature sensor and com- putes the supply-air temperature required to satisfy conditions.

Once the required supply-air temperature has been cal- culated, it is compared to the actual supply-air temperature and the required DX cooling stages are energized to main- tain the desired conditions.

See Fig. 77 for cooling operation and Fig. 78 for DX sub- master gain operation. For more complete information, refer to the Application Data book for Product Integrated Controls with DX Cooling

ELECTRIC HEATER CONTROL Ð Electric heater stag- ing regulates the electric heater. The heater is primarily used for morning warm-up or Occupied Heating, with the heater staged to maintain desired return air temperature. (The num- ber of heat stages is factory set for each unit heater.)

If the supply fan is OFF, all stages of electric heat are turned off.

If the fan is ON, the control determines if the system is in morning warm-up. If it is, the return-air sensor is read and compared to the Occupied Heating set point. If heat is re- quired, the control calculates the supply-air temperature re- quired to satisfy conditions.

Once the required supply-air temperature has been cal- culated, it is compared to the supply-air temperature to de- termine the number of heat stages required to satisfy con- ditions. The required stages are energized sequentially with 2-second intervals between stages and the heat interlock re- lay is energized. For VAV units, the number of stages turned on is limited by the PIC IGV output.

Once the morning warm-up is completed, heat is not ac- tivated again unless OCCUPIED HEAT has been selected.

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Contents Installation, Operation, Start-Up Instructions ContentsInstallation Safety ConsiderationsGeneral Page ABX IGVPIC VAVDirect Expansion FMB Ð Filter Mixing BoxMXB Ð Mixing Box Normally ClosedControl Box for Remote Mounting AFS AotcAQ1 AQ2PIC Section Control Box Component Arrangements, 39L PIC Section Control Box Component Arrangement, 39NX Sizes PIC Section Control Box Component Arrangement, 39NX Sizes Page Input and Output Points AddressUnit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Page Page Page Page Page Page Junction Box Connections for Optional Remote Control Box Terminal SignalValve Assembly Typical Hot Water Valve Wiring Chilled Water Valve Wiring Duct Static Pressure ProbeNema Ð National Electrical Manufacturers Association Resistance Temperature OhmsMixed-Air Temperature Sensor HH79NZ021 Installation Enthalpy Control Settings Supply/Return Air Temperature Sensor HH79NZ019COI L Comno Wall-Mounted Relative Humidity Sensor Fig Duct-Mounted Relative Humidity Sensor Locations Air¯ow Switch P/N HK06WC030 CO2 Sensor Accessories CGCDXSEN002A00CGCDXSEN003A00 CGCDXGAS001A00Air Quality CO2 Sensor Wall Mount Version Shown CO2 Concentration PPMOAC Pressure Transducers Recommended Sensor Device Wiring Manufacturer Part NumberProcessor Sensor Module PIN noField Wiring of Sensors Recommended Actuators StrokeField-Supplied Mixing Box Actuator Signal Wiring HAND/OFF/AUTO Switch Tran Ð Transformer High-Pressure Switch Remove JumperEvacuation Supply Fan Contactor Fire Shut Down Terminal BlockPres Single-Pole, Double-Throw Spdt Relay Wiring of Device Under Discrete Output Temperature Control Wiring of Two-Stage Humidication Control Relays Duct Mounted Relative Humidity Transmitter Wiring Air Quality and Oavp Sensor Wiring Wiring of Return Fan Volume Control With IGVs Pulse-Type Meter Wiring Control SystemCCN Communication Wiring AHU Air Handling UnitRelay Module Outdoor Air ThermostatFunction USE Keys Local Interface Device Key UsageOperative USE Keys Status History Schedule Service Set Point Test Functions and SubfunctionsSUB Function Number OavpControl Operation Operation Keyboard Display Description EntryKeyboard Directory StatusInputs VAV Direct Expansion Oavp Ð Outside Air Velocity Pressure AIRQUAL1 SET Point Quick Test History Example 2 Ð Reading Current Operating Modes Example 1 Ð Reading Alarm CodesKeyboard Display Comments Entry Response Alarms Display CodesForce States Display DescriptionState of Items Controlled Example 3 Ð Forcing An Input ValueExample 4 Ð Forcing An Output Value Relay StagesExample 5 Ð Using Quick Test Example 6 Ð Logging On and Logging Off Service FunctionKeyboard Display Comments Entry Response To LOG on To LOG OFFService Conguration Ranges and Defaults Analog Output Temperature Control Example 8 Ð Conguration of Measurements Example 7 Ð Reading and Changing Factory CongurationsExample 9 Ð User Congurations Example 10 Ð Conguration of Heating Coil Example 11 Ð Conguration of Space Temperature ResetExample 12 Ð Conguration of Loadshed Example 15 Ð Conguration of Analog Temperature Control Example 14 Ð Conguration of Alarm LimitsExample 13 Ð Conguration of Fan Tracking Example 16 Ð Conguration of Discrete Temperature Control Example 17 Ð Service History CongurationExample 18 Ð Service/Maintenance Alarm Conguration Set Point Ranges and DefaultsExample 22 Ð Setting Daylight Savings Time Example 21 Ð Setting of Time and DateExample 20 Ð Reading and Changing System Set Points Example 23 Ð Setting of Holidays Schedule I Sample Time ScheduleKeyboard Display Comment Entry Response Programming Period Example 24 Ð Using the Schedule FunctionPeriod 1 Dene schedule period For this example, Period 6 is used for holiday only Constant Volume and Variable Air Volume Units Control Operating SequencePage Page MAT Ð Mixed-Air Temperature OAT Ð Outdoor-Air TemperatureIAQ Indoor-Air QualityConstant Volume Units Only CCV Ð Cooling Coil Valve RAT Ð Return-AirDX Submaster Gain Control Operation Variable Air Volume Units Only Page Outside Air OACConstant Outside Air Oavp Ð Outside Air Velocity Pressure102 START-UP Initial CheckTest of Input Signals Keyboard Display COMMENTS/ACTION Entry ResponseKeyboard Display COMMENTS/ACTION Entry Response FSD NRM FollowingTest of Output Signals For Variable Air Volume UnitsTest of Output Options Using Option Module Electric Heater TestControl Loop Checkout Direct Expansion DX Cooling TestDigital DC Volt Meter vs DC Milliamp Meter DC Milliamps DC VoltageValve Troubleshooting Recommended Gain Starting ValvesTypical Linkages Example 25 Ð Forcing An OutputIGV % HCV 10/FORCEDExample 26 Ð Heating Coil Valve Test Way Normally Open Control Module TroubleshootingExit Test Dsio Unit Troubleshooting Problem Possible Cause Corrective ActionHCV, CCV, IGV OAC malfunctioning IAQ featuresMalfunctioning Metric Conversion Chart

39L specifications

The Carrier 39L is a cutting-edge air conditioning unit designed for both residential and commercial applications, providing exceptional cooling and heating performance. Equipped with advanced technologies, this system ensures optimal climate control while maintaining energy efficiency.

One of the standout features of the Carrier 39L is its inverter technology. This innovation allows the system to adjust its compressor speed based on the ambient temperature, which results in a significant reduction in energy consumption. By operating at varying capacities rather than a fixed output, the 39L can maintain a consistent temperature, enhancing comfort while lowering electricity bills.

The Carrier 39L also includes a high-efficiency air filtration system, designed to capture dust, allergens, and other airborne particles. This not only improves indoor air quality but also promotes a healthier living environment. The filtration system is complemented by anti-bacterial treatment, ensuring that the air circulated within your space is both clean and refreshing.

In terms of design, the Carrier 39L boasts a sleek and compact form factor, making it easy to integrate into various settings, from homes to offices. Its quiet operation is another notable feature, as it minimizes noise levels, allowing occupants to enjoy a serene atmosphere without disruptive sound.

Further enhancing convenience, the Carrier 39L comes equipped with smart connectivity options. Users can control the unit remotely via a smartphone app, making it easy to adjust settings, program schedules, and monitor energy usage from anywhere. This feature not only improves user experience but also supports energy-saving practices.

Durability is also a key characteristic of the Carrier 39L. Constructed with high-quality materials and coated with corrosion-resistant treatments, the unit is built to withstand various environmental conditions. This ensures long-lasting performance and reduces the need for frequent maintenance.

Overall, the Carrier 39L is a versatile, efficient, and user-friendly air conditioning solution. Its blend of advanced technologies, energy-saving capabilities, and robust design makes it an ideal choice for those seeking reliable climate control in their spaces. Whether for residential comfort or commercial necessity, the Carrier 39L stands out as a leader in modern air conditioning.
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