Lennox International Inc 2SCU13 Approach Values for TXV Systems, Outdoor Ambient Temp Superheat

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Superheat Values for Fixed Orifice Systems (80°DB/67°WB Return Air)

Outdoor Ambient Temp.

Superheat

°F

°F

 

 

60

38

 

 

65

35

70

30

 

 

75

26

80

22

 

 

85

18

90

12

 

 

95

8

100

5

 

 

105

0

 

 

Table 7

Pressures higher than those listed indicate that the system is overcharged. Pressures lower than those listed indicate that the system is undercharged. Verify adjusted charge using the approach method.

4.Use the same digital thermometer to check liquid line temperature.

5.Subtract the outdoor ambient temperature from the liquid line temperature to determine the approach temperature.

_____ ° Liquid Line Temperature °F

–_____ ° Outdoor Ambient Temperature °F = _____ ° Approach Temperature °F

6.Compare the approach value with those shown in Table 8. If the values to do not agree with those provided in Table 8, add refrigerant to lower the approach temperature or recover refrigerant from the system to increase the approach temperature.

Check Charge Using Normal Operating Pressures

Use Table 9 to perform maintenance checks. Table 9 is not a procedure for charging the system. Minor variations in these pressures may be due to differences in installa- tions. Significant deviations could mean that the system is not properly charged or that a problem exists with some component in the system.

Approach Values for TXV Systems

Model

-18

-24

-30

-36

-42

-48

-60

 

 

 

 

 

 

 

 

Temp.

6

10

11

9

5

5

8

°F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approach value is the liquid line temperature minus the outdoor ambient temperature (±1°F).

NOTE: For best results, use the same digital thermometer to check both outdoor ambient and liquid temperatures.

Table 8

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Contents Installation and Maintenance Instructions Table of ContentsInstallation Installation ClearancesTorque Table Slab MountingElectrical Wiring Slab MountingWind Barrier Construction Thermostat DesignationsOutside Unit Placement Installation Installing Refrigerant LineBrazing Connection Procedure Refrigerant Line Set DiametersRefrigerant Line Sets Installing Horizontal Runs Refrigerant Line Sets Transition from Vertical to HorizontalRefrigerant Metering Device Fixed Orifice SystemsExpansion Valve Systems Metering Device Installation To Access the Schrader PortTo Open Liquid or Suction Line Service Valve Fixed Orifice DataBall Type Service Valve Valve Open To Close Liquid or Suction Line Service ValveSuction Line Ball Type Service Valve Leak TestingEvacuation Refrigerant Charge Adjustment START-UPRefrigerant Charging Charge Using Weigh-In Method Fixed Orifice/TXV Systems Subcooling Values for Fixed Orifice or TXV SystemsOutdoor Liquid Subcooling ±1F Temp Check Charge Using Normal Operating Pressures Approach Values for TXV SystemsOutdoor Ambient Temp Superheat ModelNormal Operating Pressures Fixed Orifice RFCMaintenance OperationIndoor Coil Indoor UnitStart-Up and Performance Checklist Single Phase Wiring Diagram P/N Three Phase Wiring Diagram P/N Limited Warranty

2SCU13 specifications

Lennox International Inc. is renowned for its innovation in heating, ventilation, air conditioning, and refrigeration (HVACR) systems. One of its standout products is the 2SCU13 model, which embodies the company's commitment to energy efficiency and customer comfort. This air conditioning unit is particularly appreciated in both residential and light commercial applications for its robust performance and advanced features.

The 2SCU13 is designed with a focus on energy efficiency, boasting a SEER rating of up to 14. This not only eases the burden on utility bills but also aligns with environmentally conscious practices by reducing carbon footprints. The unit’s efficiency is further enhanced by its scroll compressor, which is known for reliable performance and quiet operation.

One of the key characteristics of the 2SCU13 is its two-stage cooling system. This technology allows the unit to operate at two different cooling capacities, adapting to varying temperature conditions. By running at a lower capacity during mild weather, the 2SCU13 minimizes energy consumption, while still ensuring optimal comfort during hotter days by ramping up to full capacity when needed. This adaptability also contributes to a more consistent temperature throughout the space being cooled.

Another notable feature is the unit's humidity control capabilities. The two-stage operation also aids in managing indoor humidity levels, making it an excellent choice for areas with high humidity. Proper humidity control not only enhances comfort but also plays a crucial role in improving indoor air quality.

The design of the 2SCU13 ensures durability and longevity. It comes equipped with a rugged cabinet that withstands the elements, along with a baked-on powder coat finish that resists rust and corrosion. The unit also includes a protective grille that serves to shield the coil from debris, further enhancing its lifespan.

With easy installation and maintenance in mind, Lennox has incorporated service-friendly features into the design of the 2SCU13. The unit includes a convenient access panel that simplifies routine checks and repairs, making it easier for homeowners and technicians alike.

Overall, Lennox International Inc. 2SCU13 represents a harmonization of efficiency, comfort, and durability, making it a noteworthy choice among HVAC systems. Its advanced technology and design features ensure that it meets the evolving needs of consumers while providing reliable performance for years to come.
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