Carrier 39L Control Loop Checkout, Direct Expansion DX Cooling Test, DC Milliamps DC Voltage

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Table 22 Ð Direct Expansion (DX) Cooling Test

 

 

 

KEYBOARD

DISPLAY

COMMENTS/ACTION

ENTRY

RESPONSE

 

 

 

NOTE: Only the con®gured number of stages are tested and appear on the display.

 

DX COOL

Entering ®eld test DX cooling coil. (Set the HOA switch to AUTO.)

 

DXS1 X

 

 

STG1 TST

The fan starts. If fan has IGVs, the IGVs open to 30%. After an 11-second delay, the 1st stage of DX cooling

 

is turned ON.

 

 

 

DXS2 X

The 1st stage of DX cooling is turned OFF.

 

STG2 TST

After a 2-second delay, the 2nd stage of DX cooling is turned ON.

 

DXS3 X

The 2nd stage of DX cooling is turned OFF.

 

STG3 TST

After a 2-second delay, the 3rd stage of DX cooling is turned ON.

 

DXS4 X

The 3rd stage of DX cooling is turned OFF.

 

STG4 TST

After a 2-second delay, the 4th stage of DX cooling is turned ON

 

DXS5 X

The 4th stage of DX cooling is turned OFF.

 

STG5 TST

After a 2-second delay, the 5th stage of DX cooling is turned ON.

 

DXS6 X

The 5th stage of DX cooling is turned OFF.

 

STG6 TST

After a 2-second delay, the 6th stage of DX cooling is turned ON.

 

DXS7 X

The 6th stage of DX cooling is turned OFF.

 

STG7 TST

After a 2-second delay, the 7th stage of DX cooling is turned ON.

 

DXS8 X

The 7th stage of DX cooling is turned OFF.

 

STG8 TST

After a 2-second delay, the 8th stage of DX cooling is turned ON.

 

EXIT TST

The fan and preceding DX cooling stage shut OFF.

 

TST CMPL

Test is complete. The unit is back under automatic control.

 

 

 

Electronic Valve Actuator Field Test Ð The elec- trically operated valve actuators supplied with 1¤2-in. to 11¤4-in. valve assemblies are a hydraulic, linear-piston type. The actuators supplied with the 11¤2-in. to 3-in. valve assem- blies are an electro-mechanical type. Both types of actuators contain a spring as part of the valve assembly. The spring returns the stem to its normal position whenever there is a loss of power or signal. Both actuators contain an internal solid-state drive which accepts a proportional 4 to 20 mA signal generated by the controller.

An increase in signal proportionally extends the actuator shaft and pushes the valve stem down. A decrease in signal retracts the actuator shaft and lifts the valve stem up. Valve construction determines normal valve ¯ow, either stem-up open, or stem-up closed. On 3-way mixing valves, stem-up allows ¯ow from port B to port AB.

Perform ®eld test for actuator as follows:

1.Verify actuator is powered by 24 vac at the WHITE/ BLUE and BLACK actuator wires.

2.Use a digital milliamp meter to verify the mA signal and proper polarity at the input signal leads, 1RED and −GREEN. A digital volt meter with a minimum of 2-place accuracy may be used to determine signal value, see Table 23.

3.Enter the heating coil valve or cooling coil valve Quick Test, retract the actuator shaft and completely lift valve stem.

4.While still in Quick Test, press . The actuator shaft should extend completely, pushing valve stem down. Exit Quick Test procedure.

Table 23 Ð Digital DC Volt Meter vs

DC Milliamp Meter

DC MILLIAMPS

DC VOLTAGE

4

.33

8

.57

12

.99

16

1.32

20

1.65

NOTE: The internal solid-state drives of the factory-supplied elec- tronic actuators impose a 82.5 ohm impedance to the signal current loop. A proportional voltage, ranging from 0.33 vdc at 4 mA to to 1.65 vdc at 20 mA will be present.

CONTROL LOOP CHECKOUT

Checkout and adjustment of control loops should only be performed by certi®ed Carrier Comfort Network tech- nicians. The following checkout procedure is offered as a guide and presumes the user has obtained basic knowl- edge of controls through CCN training.

To Check Operation of Analog Outputs Ð The control algorithms of the 39L and 39NX use the master/ submaster loop concept. The master loop monitors the mas- ter sensor (the sensor which tries to maintain the desired set point), and calculates the submaster reference required to do so. The submaster loop monitors the submaster sensor and controls the output to the controlled device. These algo- rithms require a number of gain values to function properly. The 39L and 39NX come with preset default values. How- ever, it may be necessary to adjust several of these values to achieve stable control. These values are submaster loop gain (SMG), submaster loop center value (SCV), master loop pro- portional gain (MPG) and, in some cases, master loop in- tegral gain (MIG).

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Contents Installation, Operation, Start-Up Instructions ContentsSafety Considerations InstallationGeneral 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 ThermostatLocal Interface Device Key Usage Function USE KeysOperative 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 1 Ð Reading Alarm Codes Example 2 Ð Reading Current Operating ModesKeyboard 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 7 Ð Reading and Changing Factory Congurations Example 8 Ð Conguration of MeasurementsExample 9 Ð User Congurations Example 11 Ð Conguration of Space Temperature Reset Example 10 Ð Conguration of Heating CoilExample 12 Ð Conguration of Loadshed Example 14 Ð Conguration of Alarm Limits Example 15 Ð Conguration of Analog Temperature ControlExample 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 21 Ð Setting of Time and Date Example 22 Ð Setting Daylight Savings TimeExample 20 Ð Reading and Changing System Set Points Example 23 Ð Setting of Holidays Schedule I Sample Time ScheduleExample 24 Ð Using the Schedule Function Keyboard Display Comment Entry Response Programming PeriodPeriod 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/FORCEDControl Module Troubleshooting Example 26 Ð Heating Coil Valve Test Way Normally OpenExit Test Dsio Unit Troubleshooting Problem Possible Cause Corrective ActionHCV, CCV, IGV IAQ features OAC malfunctioningMalfunctioning 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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