Lennox Xion™ LHX Rooftop Units

Model Number Identification

The model number is structured to identify key features:

• LHX: Series designation
• 120: Nominal Cooling Capacity (10 Tons)
• S5: Cooling Efficiency (Standard Efficiency)
• M: Blower Type (MSAV® Multi-Stage Air Volume, Belt Drive)
• N: Factory Installed Electric Heat (No Heat)
• 1: Minor Design Sequence (1st Revision)
• Y: Voltage (e.g., Y = 208/230V-3 phase-60Hz)

Feature Highlights

Xion™ rooftop units are engineered for reliable performance and year-round comfort, featuring:

• Scroll Compressors
• Check/Thermal Expansion Valves
• Reversing Valves
• Filter/Driers
• Copper Tube Outdoor Coil
• Outdoor Coil Fan Motors
• Heavy Gauge Steel Cabinet
• Insulation
• Hinged Access Panels (optional)
• MSAV™ Multi-Stage Air Volume Blower
• Electric Heat (option)
• Air Filters
• Lennox® CORE Lite Control System

Approvals and Warranty

Approvals

• AHRI Standard 340/360-2023 certified
• ETL and CSA listed
• Unit and components ETL, NEC and CEC bonded for grounding
• ASHRAE 90.1 energy efficiency compliant
• DOE 2023 energy efficiency standards
• HCAI (OSHPD) Special Seismic Certification
• California Code of Regulations, Title 24 compliant
• ISO 9001 Registered Manufacturing Quality System

Warranty

• Compressors: Limited five years
• Lennox® CORE Lite Unit Controller: Limited three years
• Variable-Frequency Drive (VFD): Limited five years
• High Performance Economizers (optional): Limited five years
• All other covered components: Limited one year

Cooling/Heating System

• Designed for maximum sensible and latent cooling performance.
• Operates in cooling mode from 45°F to 125°F.
• Uses R-454B Refrigerant (Low GWP, Zero ODP, Low Toxicity/Lower Flammability - A2L).
• Two-stage scroll compressor system with resilient mounting for quiet operation.
• Compressor crankcase heaters protect against refrigerant migration.
• Check/Thermal Expansion Valves ensure optimal performance.
• 4-way reversing valve for quick changeover.
• High capacity filter/drier protects the system.
• High Pressure Switches protect the compressor from overload.
• Low Pressure Switches protect against low/no airflow.
• Indoor coil freeze protection prevents evaporator coil ice build-up.
• Coil construction includes copper tubes and aluminum fins with flared shoulder tubing connections.
• Antimicrobial condensate drain pan with a sloped design.
• Single speed outdoor coil fan motors with thermal overload protection.

Cabinet

• Heavy-gauge steel panels and base rail with rigging holes and fork slots.
• Raised edges around duct and power entry openings for water protection.
• Available in downflow (vertical) or field-converted horizontal airflow configurations.
• Duct flanges provided for horizontal duct attachment.
• Power entry through unit base or horizontal access knock-out.
• Exterior panels constructed of heavy-gauge, galvanized steel with a textured pre-paint polyurethane finish.
• Fully insulated with non-hygroscopic fiberglass insulation.
• Unit base is fully insulated and serves as an air seal.

Indoor Air Quality

• Disposable 2-inch MERV 4 filters furnished as standard.
• Optional Healthy Climate® High Efficiency Air Filters (MERV 8, 13, or 16).
• Optional Replacement Filter Media Kit With Frame.
• Optional Healthy Climate® UVC Germicidal Lamps to reduce microbes.
• Optional Needlepoint Bipolar Ionization (NPBI) Kit to reduce airborne contaminants.
• Optional Indoor Air Quality (CO2) Sensors to monitor CO2 levels and adjust economizer dampers.

Lennox® CORE Lite Control System

• Designed for accelerated equipment installation and service.
• Microprocessor-based controller for flexible unit control.
• CORE Mobile Service App for guided setup, testing, and troubleshooting.
• Features include a 7-Segment Display for unit status and alarms, SmartWire™ System, and USB port for information transfer and software updates.
• Configurable functions include multiple cooling airflows, programmable blower speeds, economizer control options, exhaust fan control, and more.
• Includes component protection and unit safeguards such as compressor time-off delay, adjustable blower delays, and smoke alarm modes.
• Compatible with DDC and 24V thermostats, BACnet MS/TP (field option), and Lennox S-BUS.

Economizer

• Economizer operation is controlled by the Lennox® CORE Lite Unit Controller.
• Simple plug-in connections for easy installation.
• Factory-installed CEC Title 24 approved sensors for outdoor, return, and discharge air temperature monitoring.
• Optional sensors available for enhanced outdoor air suitability determination.
• Available options include High Performance Economizer (California Title 24 compliant), Differential Enthalpy Control, and Differential Sensible Control.

Options and Accessories

A wide range of options and accessories are available, including:

• Cooling System: Condensate Drain Trap, Drain Pan Overflow Switch.
• Blower: Various Blower Motors, VFD Manual Bypass Kit, Drive Kits.
• Cabinet: Combination Coil/Hail Guards, Hinged Access Panels, Horizontal Discharge Kit, Return Air Adaptor Plate.
• Controls: BACnet® MS/TP Module, Dirty Filter Switch, Smoke Detector.
• Indoor Air Quality: High Efficiency Air Filters, UVC Germicidal Lamps, Needlepoint Bipolar Ionization (NPBI) Kit, CO2 Sensors.
• Electrical: Disconnect Switches, GFI Service Outlets, Weatherproof Covers.
• Electric Heat: Various kW options available.
• Economizer: High Performance Economizer, Economizer Controls, Outdoor Air Dampers.
• Power Exhaust: Standard Static Power Exhaust Fan.
• Roof Curbs: Hybrid Roof Curbs, Adjustable Pitch Curb.
• Ceiling Diffusers: Round and Rectangular Transitions, Step-Down and Flush Diffusers.

Specifications

Detailed specifications for cooling, heating, sound, and electrical performance are provided, including:

• Nominal Tonnage
• Efficiency Type
• Blower Type and Air Volume
• Cooling and Heating Performance data (Capacity, COP, IEER, EER)
• Sound Rating Number (dBA)
• Refrigerant Type and Charge
• Electric Heat Availability
• Compressor Type
• Outdoor and Indoor Coil details (Face area, Rows, Fins, Tube diameter)
• Outdoor Coil Fan Motor specifications
• Blower Motor and Drive Kit specifications
• Filter type and size
• Line voltage data
• Unit Clearances (Service and Minimum Operation)
• Outdoor Sound Data (Octave Band Sound Power Levels)
• Weight Data (Net and Shipping)
• Dimensions and Center of Gravity

Sequence of Operation

Details the unit's operation based on thermostat demand and economizer presence, including supply air blower speed settings for ventilation, cooling, and heating modes.

Blower Data

Provides detailed blower performance tables for various air volumes and static pressures, including RPM and BHP for different motor sizes and drive kits.

Electrical/Electric Heat Data

Contains comprehensive tables for electrical characteristics, including compressor ratings, fan motor data, and electric heat capacities for various voltage and kW configurations. Also lists disconnect options.

Revisions

Document revisions include the addition of the VFD Manual Bypass Kit.