Carrier 69NT20-531-300 manual Set point, the test proceeds to test, By starting P10-0 over

Page 49

Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4)

 

 

Setup: If the container temperature is below 7.2_C (45_F), the set point is

 

 

changed to 7.2_C and a 180 minute timer is started. The control will then be

 

 

placed in the equivalent of normal heating. If the container temperature is above

P10-0

Frozen Mode

7.2_C at the start of the test, then the test proceeds immediately to test 10-1.

During this test, the control temperature will be shown in the right display.

Heat Test

 

Pass/Fail Criteria: The test fails if the 180 minute timer expires before the con-

 

 

 

 

trol temperate reaches set point -0.3_C (0.17_F). If the test fails it will not auto-

 

 

repeat. There is no pass display for this test, once the control temperature reaches

 

 

set point, the test proceeds to test 10-1

 

 

Requirements: Control temperature must be at least 7.2_C (45_F)

 

 

Setup: The set point is changed to -17.8_C (0_F). The system will then attempt

P10-1

Frozen Mode Pull

to pull don the Control temperature to set point using normal frozen mode cool-

ing. During this test, the control temperate will be shown on the right display

Down Test

 

Pass/Fail Criteria: If the control temperature does not reach set point -0.3_C

 

 

 

 

(0.17_F) before the 180 minute timer expires the test fails and will auto-repeat

 

 

by starting P10-0 over..

 

 

Requirements: Test P10-1 must pass for this test to execute. This test is skipped

 

 

if the DATAcorder is not configured or available.

 

 

Setup: During this test, the left display will read “P10-2,” and the right display

 

 

will show the supply air temperature. A two hour timer is started. The unit will

 

 

be required to maintain the temperature to within + 0.5_C (0.9_F)/-1.3_C

 

 

(2.3_F) of set point until a DataCORDER recording is executed. The recorder

 

 

supply probe temperature running total (and its associated readings counter) will

 

Frozen Mode

be zeroed out for the remainder of the recording period at the start of this test, so

P10-2

Maintain

that the actual value recorded in the DataCORDER will be an average of only

 

Temperature Test

this test’s results. Once a recording interval is complete, the average recorder

 

 

supply temperature will be recorded in the DataCORDER, as well as stored in

 

 

memory for use in applying the test pass/fail criteria.

 

 

Pass/Fail Criteria: If the recorded temperature is within +0.5_C (0.9_F)/-1.3_C

 

 

(2.3_F) of set point from test start to DataCORDER recording, the test passes. If

 

 

the average temperature is outside of the tolerance range at the recording, the test

 

 

fails and will auto-repeat by starting P10-0 over.

 

 

 

T-309

3-24

Page 48 Page 50
Image 49
Page 48 Page 50
Contents Service Model Safety Summary 309 Safety-2 Safety-3 309 Table of Contents Table of Contents Check Controller Function Codes Connect Remote MonitoringEvaporator Coil Replacement Evaporator Heater Replacement Valve ReplacementReplacing The Evaporator Fan Assembly Precheck Procedure Checking The Stepper valveElectrical Wiring Schematic Refrigeration Circuit Schematic Economized Operation Refrigeration Circuit Schematic Standard OperationList of Tables DataCORDER Configuration VariablesUnit is fitted with a scroll compressor Section IntroductionManual, T-300 Section Description Evaporator Section Compressor Section Condenser Section Communications interface module For further information Module which allow communication with a masterTemperature Model RSH105 Weight Dry 46.5 kg 103 lbApproved Oil Mobil ST32 Oil Charge 2957 ml 100 ounces Oil level range, with the compressor offElectrical Data Safety and Protective Devices Refrigeration Circuit 2.5.1 Standard Operation Standard Operation with Receiver Refrigeration Circuit Schematic -- Economized Operation Section Microprocessor Temperature Control SystemKEY Function Controller Software Modes of Operation Perishable Mode -- Economy Controller Alarms Unit PRE-TRIP Diagnostics DCF02=2 Thermistor inputssupply & returnDCF02=5 Usda thermistor inputs DCF02=6Raw Data Report for ABC1234567 Standard Configuration Download ReportLogging Interval dCF03 DataCORDER may be powered up in any one of four waysDataView DataCORDER Alarms Std, Full CnF11 Defrost Off Selection NoOFFCnF33 Snap Freeze Option SnAPDisplay Only Functions Possibly delaying a needed defrost cycle Defrost temperature sensor reading is displayedSensor Reading Plicable with frozen set pointsController Function Codes Sheet 3 Controller Alarm Indications Sheet 1 Controller Alarm Indications Sheet 2 Controller Alarm Indications Sheet 3 Memory failure Error DescriptionP1-1 Draw test is done after 15 secondsDraw test is done after 10 seconds OndsTest fails Supply is comparedP6-2 Crease, the test failsTimer is started Pressure switch is open or the condenser fan switch is openDenser fan is started and a 60 second timer is started Requirements Control temperature must be at least 15.6C 60FSet point, the test proceeds to test Requirements Control temperature must be at least 7.2C 45FBy starting P10-0 over Inapplicable Functions Display Title Data 10 DataCORDER Alarm Indications 69NT Fresh AIR Makeup OperationTo start a pre-trip test, do the following Will be displayedWill be displayed Pull Down Falling Rising Controller Operation -- Perishable ModeController Operation -- Frozen Mode Frozen Mode Defrost Section Troubleshooting Unit will not heat or has insuffi Bent motor shaft Will not initiate defrostSuperheat Unit reads abnormal currents Current sensor wiring Check Valve Frontseated Backseated Section ServiceCompressor in a deep vacuum, internal dam- age will result Refrigerant Leak Checking Remove all refrigerant using a refrigerant recovery system Refrigerant Charge Compressor Upper Mounting Compressor OIL Level Condenser FAN and Motor Assembly Wrapped with Insulating compound. See Two expansion valves are used, the evaporatorRemoving the Expansion Valve If applicable, braze the equalizer connection to Cleaned regularly. The preferred cleaning fluid is freshEqualizer line Check superheat refer to step14. Unloader Solenoid Valve Start unit and check operationEvaporator FAN Motor Capacitors Valve Override Controls Precheck Procedure TP1 Mounting Stud Type Cut one wire of existing cable 40 mm 1-1/2 inch Cut wires 5 cm 2 inches from shoulder of defecShorter than the other wire Cut one replacement sensor wire opposite colorMaintenance of Painted Surfaces 23 Door Hinge Repair Crack, Chip & Hole Repair Kit 24. Insert Location In-lbs Ft-lbs 13.99 18.86 In-lbs #10 Ft-lbs 12.72 17.1414.6 49.4 37.08 12.3 41.6 31.25 32.8 24.64 22.7 17.00 11.9 Section Electrical Wiring Schematic Schematic Diagram Wiring Diagram Sheet 1 Wiring Diagram Sheet 2 Index 309 Index-2

69NT20-531-300 specifications

The Carrier 69NT20-531-300 is a cutting-edge rooftop unit designed to meet the demanding requirements of commercial heating and cooling applications. This model embodies Carrier’s commitment to energy efficiency, reliability, and advanced technological features that enhance indoor comfort while minimizing operational costs.

One of the standout features of the Carrier 69NT20-531-300 is its high energy efficiency. It is equipped with advanced compressor technology that optimizes performance while reducing energy consumption. This ensures that businesses can maintain a comfortable indoor climate without incurring exorbitant utility bills. With a high Seasonal Energy Efficiency Ratio (SEER) and Energy Efficiency Ratio (EER), users can expect not only enhanced comfort but also significant cost savings over time.

The cooling capabilities of the 69NT20-531-300 are complemented by its robust heating options. This unit utilizes a gas heat exchanger, ensuring quick and even heating throughout the space. The combination of cooling and heating capabilities in one compact unit makes it a versatile choice for various applications, including retail spaces, offices, and warehouses.

In addition to its impressive performance specifications, the Carrier 69NT20-531-300 incorporates innovative technologies that further enhance its functionality. The unit comes with advanced controls, allowing for precise temperature regulation and zoning capabilities. This ensures that different areas of a building can maintain their desired temperatures based on usage, improving overall energy efficiency.

Durability is another hallmark of the Carrier 69NT20-531-300. The unit is constructed with high-quality materials and features a weather-proof cabinet that protects it from the elements, ensuring long-term reliability even in harsh conditions. Furthermore, its modular design simplifies maintenance, making it easy for technicians to access critical components.

The 69NT20-531-300 is also designed with low noise operation in mind. It employs sound-dampening technology to ensure that operations are quiet, making it an ideal choice for locations where noise reduction is a priority, such as schools or healthcare facilities.

Overall, the Carrier 69NT20-531-300 stands out as a premier choice for businesses looking for an efficient, reliable, and feature-rich rooftop HVAC unit. Its blend of energy efficiency, advanced technology, and durability positions it as a leader in commercial heating and cooling solutions, making it a valuable investment for any commercial property.
Top Page Image Contents