Lennox International Inc 2SCU13 Slab Mounting, Wind Barrier Construction, Thermostat Designations

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Slab Mounting

Discharge Air

Building

Structure

Mounting Slab

Ground Level

2° or 2" per 5' slope tolerance away from building structure.

Figure 2

Wind Barrier Construction

Prevailing Winter Winds

 

Wind Barrier

 

Inlet Air

24"

 

 

Inlet Air

Inlet Air

 

Figure 3

Electrical Wiring

All field wiring must be done in accordance with the National Electrical Code (NEC) recommendations, Canadian Electrical Code (CEC) and CSA Standards, or local codes, where applicable.

WARNING

Unit must be grounded in accordance with national and local codes. Failure to ground unit properly can result in personal injury or death.

Refer to the furnace or blower coil Installation Instructions for additional wiring application diagrams and refer to unit rating plate for minimum circuit ampacity and maximum overcurrent protection size.

# 48283B006

1.Install line voltage power supply to unit from a properly sized disconnect switch. Any excess high voltage field wiring should be trimmed or secured away from the low voltage field wiring.

2.Ground unit at unit disconnect switch or to an earth ground. To facilitate conduit, a hole is in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting. Units are approved for use only with copper conductors. 24V Class II circuit connections are made to the low voltage pigtails. A complete unit wiring diagram is located inside the unit control box cover (see also pages 16 and 17 of this instruction).

3.Install room thermostat on an inside wall that is not subject to drafts, direct sunshine, or other heat sources.

4.Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit (see Figure 4).

5.Do not bundle any excess 24V control wire inside control box. Run control wire through installed wire tie and tighten wire tie to provide low voltage strain relief and to maintain separation of field-installed low and high voltage circuits.

Thermostat Designations

Thermostat

Indoor Unit

 

R

Power

R

Outdoor

 

Unit

 

Heat

 

W1

W

 

 

 

Y

Cooling

Y

Y1 Outdoor Unit

 

 

G

Indoor Blower

 

 

G

 

C

 

C

C Outdoor Unit

 

 

See unit wiring diagram for power supply connections. If the indoor unit is not equipped with a blower relay, one must be field supplied and installed.

Do not connect C (common) connection between indoor unit and thermostat except when required by the indoor thermostat. Refer to thermostat installation instructions. C (common) connection between indoor unit and outdoor unit required for proper operation.

Figure 4

Refrigerant Piping

Field refrigerant piping consists of liquid and suction lines from the outdoor unit (sweat connections) to the indoor coil (flare or sweat connections).

Select line set diameters from Table 2 on page 4 to ensure that oil returns to the compressor. Size vertical

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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 RunsRefrigerant Metering Device Fixed Orifice SystemsExpansion 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 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 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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