Lennox International Inc 2SCU13 Fixed Orifice Data, Metering Device Installation, TXV Data

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Fixed Orifice Data

Model

Part

Drill

Number

Size

 

 

 

 

2SCU13-18

100484-07

.053

 

 

 

2SCU13-24

100484-12

.062

2SCU13-30

100484-19

.070

 

 

 

2SCU13-36

100484-24

.076

2SCU13-42

100484-30

.082

 

 

 

2SCU13-48

100484-38

.091

2SCU13-60

100484-45

.099

 

 

 

Table 3

Metering Device Installation

Figure 9

TXV Data

Model

Part

Number

 

 

 

2SCU13-18, -24, -30, -36

26K34

 

 

2SCU13-42, -48

26K35

2SCU13-60

91M01

 

 

Table 4

To install an expansion valve (see Figure 9):

1.Separate the distributor assembly and remove the piston orifice and used teflon seal. Insert nozzle end of

# 48283B006

the expansion valve along with a new teflon seal into the distributor and tighten to 20 – 30 ft. lbs. Use backup wrench on all wrench flats. Overtightening will crush the teflon seal and may cause a leak.

2.Attach liquid line portion of distributor assembly along with new teflon seal to the inlet of the expansion valve. Tighten to 20 – 30 ft. lbs. Use backup wrench on all wrench flats. Overtightening will crush the teflon seal and may cause a leak.

3.Connect the external equalizer line to the equalizer port on the suction line and tighten to 8 ft. lbs.

4.Strap the superheat sensing bulb to the suction header.

If installing an expansion valve on an indoor coil that previously used a fixed orifice, be sure to remove the existing fixed orifice. Failure to remove a fixed orifice when installing an expansion valve to the indoor coil will result in improper operation and damage to the system.

Manifold Gauge Set

When checking the unit charge, use a manifold gauge set that is equipped with “low loss” hoses. Do not use a manifold gauge set with anything other than a “low loss” hose.

Liquid and Suction Line Service Valves

The liquid line and suction line service valves and service ports are used for leak testing, evacuating, charging, and checking charge.

Each valve is equipped with a service port which has a factory-installed Schrader valve (see Figure 10 on page 8). A service port cap protects the Schrader valve from con- tamination and serves as the primary leak seal.

To Access the Schrader Port:

1.Remove the service port cap with an adjustable wrench.

2.Connect gauge to the service port.

3.When testing is completed, replace service port cap. Tighten finger tight, then an additional 1/6 turn.

To Open Liquid or Suction Line Service Valve:

1.Remove stem cap with an adjustable wrench.

2.Use a service wrench with a hex-head extension to back the stem out counterclockwise as far as it will go. Use a 3/16" hex head extension for liquid line service valves and a 5/16" extension for suction line service valves.

3.Replace the stem cap. Tighten finger tight, then tighten an additional 1/6 turn.

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Contents Table of Contents Installation and Maintenance InstructionsSlab Mounting InstallationInstallation Clearances Torque TableThermostat Designations Electrical WiringSlab Mounting Wind Barrier ConstructionRefrigerant Line Set Diameters Outside Unit Placement InstallationInstalling Refrigerant Line Brazing Connection ProcedureRefrigerant Line Sets Transition from Vertical to Horizontal Refrigerant Line Sets Installing Horizontal RunsFixed Orifice Systems Refrigerant Metering DeviceExpansion Valve Systems Fixed Orifice Data Metering Device InstallationTo Access the Schrader Port To Open Liquid or Suction Line Service ValveLeak Testing Ball Type Service Valve Valve OpenTo Close Liquid or Suction Line Service Valve Suction Line Ball Type Service ValveEvacuation START-UP Refrigerant Charge AdjustmentRefrigerant Charging Subcooling Values for Fixed Orifice or TXV Systems Charge Using Weigh-In Method Fixed Orifice/TXV SystemsOutdoor Liquid Subcooling ±1F Temp Model Check Charge Using Normal Operating PressuresApproach Values for TXV Systems Outdoor Ambient Temp SuperheatFixed Orifice RFC Normal Operating PressuresIndoor Unit MaintenanceOperation Indoor CoilStart-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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