Carrier 39L specifications Air Quality and Oavp Sensor Wiring

Page 62

AIR QUALITY SENSOR Ð Air quality (AQ) sensors are CO2 sensors shipped inside the fan section for ®eld instal- lation. To wire the sensors after they are mounted in the con- ditioned air space and return air duct, see Fig. 62 and the instructions shipped with the sensors. For each sensor, use two 2-conductor 20 AWG twisted-pair cables (unshielded) to connect the separate 24 vac power source to the sensor and the sensor to the option module (PSIO slave) terminals. To connect each AQ sensor to the option module, identify the positive (1) and negative (−) terminals on the sensor; connect AQ1 to terminals 25 and 26 and connect AQ2 to terminals 28 and 29.

OUTSIDE AIR VELOCITY PRESSURE (OAVP) SEN- SOR Ð The OAVP sensor is factory installed and wired. As shown in Fig. 62, the sensor's power wiring is connected to TB2, 9 and 10 for 39L units or TB2, 29 and 30 for 39NX units; the signal leads are connected to terminals 31 and 32 in the option module.

Note that if the velocity pressure of the supply and/or re- turn air is below 0.75 in. wg, the system may require trans- ducers with lower ranges than those of the default factory- supplied transducers. As a general rule, size transducers so that the maximum air velocity pressure is 75% of the transducer's maximum value. For example, if the 39L or 39NX unit produces a maximum air velocity pressure of

0.15in. wg, a transducer with a maximum value of

0.20in. wg can be used. Sizing the transducers according to these guidelines ensures that they have good resolution.

Factory-Supplied Return Fans with Inlet Guide Vanes (IGVs) are factory wired except for the air supply control signal from the air¯ow monitoring stations, which is con- nected in the ®eld to the bulkhead ®tting.

Return Fans with Field-Supplied IGV Actuators must be able to receive a 4 to 20 mA signal and may NOT have an im- pedance of more than 600 ohms. An isolated power source must be ®eld-supplied and installed. See Table 9 for recommended actuators.

To install actuators, see Fig. 65. Using a 2-conductor

20 AWG conductor cable (one twisted pair, unshielded) rated for the application, connect the positive (1) wire to terminal 37 in the option module. Connect the negative (−) wire to terminal 38. Connect the 24 vac power leads to TB2, terminals 23 and 24.

Field-Supplied Return Fans with Variable Frequency Drives must have 4 to 20 mA signal input boards and their own ®eld-supplied and installed power sources.

To install return fans with variable frequency drives, see Fig. 66. Using a 2-conductor 20 AWG conductor cable (one twisted pair, unshielded) rated for the application, con- nect the positive (1) signal wire to terminal 37 in the option module. Connect the negative signal (−) wire to terminal 38.

The supply fan minimum set point must be equal to the return fan minimum air¯ow, plus the delta air¯ow that is to be maintained.

LEGEND

AQ Ð Air Quality Sensor

OAVP Ð Outside Air Velocity Pressure Sensor

Field Wiring Factory Wiring

NOTE: See unit label diagram or Fig. 12 for remote-mount control box connections.

Fig. 62 Ð Air Quality and OAVP Sensor Wiring

FAN VOLUME CONTROL (Fig. 63)

Air¯ow Monitoring Stations are ®eld-selected and ®eld- installed in the supply and return air ducts; see Fig. 63. Install each monitoring station in a straight portion of the duct with any upstream or downstream elbows or ®ttings at least 2.5 diameters away.

Use approved plenum tubing to connect each monitoring station to the bulkhead ®ttings on top of the control box. For runs up to 50 ft, use 1¤4-in. OD tubing. For runs over 50 ft, use 3¤8-in. OD tubing.

Differential Pressure Transducers for fan volume control are factory-installed in the control box (two are supplied). The power supply for the transducers is also factory installed. Both transducers have pressure ranges of 0.0 to 1.0 in. wg and produce 2 to 10 vdc signals. See Fig. 64 for wiring details.

IGV Ð Inlet Guide Vane

Field Wiring

NOTE: Air monitoring stations are ®eld supplied and installed; pres- sure transducers are factory supplied and installed.

Fig. 63 Ð Field-Installed Fan Volume Control

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Contents Installation, Operation, Start-Up Instructions ContentsGeneral Safety ConsiderationsInstallation Page PIC ABXIGV VAVMXB Ð Mixing Box Direct ExpansionFMB Ð Filter Mixing Box Normally ClosedControl Box for Remote Mounting AQ1 AFSAotc 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 CGCDXSEN003A00 CO2 Sensor AccessoriesCGCDXSEN002A00 CGCDXGAS001A00Air Quality CO2 Sensor Wall Mount Version Shown CO2 Concentration PPMOAC Pressure Transducers Processor Recommended Sensor Device WiringManufacturer Part Number Sensor Module PIN noField Wiring of Sensors Recommended Actuators StrokeField-Supplied Mixing Box Actuator Signal Wiring Evacuation Supply Fan Contactor HAND/OFF/AUTO Switch Tran Ð TransformerHigh-Pressure Switch Remove Jumper 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 Relay Module AHUAir Handling Unit Outdoor Air ThermostatOperative USE Keys Local Interface Device Key UsageFunction USE Keys SUB Function Number Status History Schedule Service Set Point TestFunctions and Subfunctions OavpControl Operation Operation Keyboard Display Description EntryKeyboard Directory StatusInputs VAV Direct Expansion Oavp Ð Outside Air Velocity Pressure AIRQUAL1 SET Point Quick Test History Keyboard Display Comments Entry Response Example 1 Ð Reading Alarm CodesExample 2 Ð Reading Current Operating Modes Force States AlarmsDisplay Codes Display DescriptionExample 4 Ð Forcing An Output Value State of Items ControlledExample 3 Ð Forcing An Input Value Relay StagesKeyboard Display Comments Entry Response To LOG on Example 5 Ð Using Quick TestExample 6 Ð Logging On and Logging Off Service Function To LOG OFFService Conguration Ranges and Defaults Analog Output Temperature Control Example 9 Ð User Congurations Example 7 Ð Reading and Changing Factory CongurationsExample 8 Ð Conguration of Measurements Example 12 Ð Conguration of Loadshed Example 11 Ð Conguration of Space Temperature ResetExample 10 Ð Conguration of Heating Coil Example 13 Ð Conguration of Fan Tracking Example 14 Ð Conguration of Alarm LimitsExample 15 Ð Conguration of Analog Temperature Control Example 18 Ð Service/Maintenance Alarm Conguration Example 16 Ð Conguration of Discrete Temperature ControlExample 17 Ð Service History Conguration Set Point Ranges and DefaultsExample 20 Ð Reading and Changing System Set Points Example 21 Ð Setting of Time and DateExample 22 Ð Setting Daylight Savings Time Example 23 Ð Setting of Holidays Schedule I Sample Time SchedulePeriod 1 Dene schedule period Example 24 Ð Using the Schedule FunctionKeyboard Display Comment Entry Response Programming Period For this example, Period 6 is used for holiday only Constant Volume and Variable Air Volume Units Control Operating SequencePage Page IAQ MAT Ð Mixed-Air TemperatureOAT Ð Outdoor-Air Temperature 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 Constant Outside Air Outside AirOAC 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 TestDigital DC Volt Meter vs DC Milliamp Meter Control Loop CheckoutDirect Expansion DX Cooling Test DC Milliamps DC VoltageValve Troubleshooting Recommended Gain Starting ValvesIGV % Typical LinkagesExample 25 Ð Forcing An Output HCV 10/FORCEDExit Test Control Module TroubleshootingExample 26 Ð Heating Coil Valve Test Way Normally Open Dsio Unit Troubleshooting Problem Possible Cause Corrective ActionHCV, CCV, IGV Malfunctioning IAQ featuresOAC malfunctioning 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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