LINNOX LGT 092 Rooftop Units High Efficiency Instruction Manual

COMMERCIAL
PRODUCT SPECIFICATIONS

PACKAGED GAS / ELECTRIC
LGT Enlight™ Rooftop Units
High Efficiency – 60 Hz

7.5 to 12.5 Tons
Net Cooling Capacity − 90,000 to 136,000 Btuh
Gas Input Heat Capacity − 130,000 to 240,000 Btuh

LGT 092 Rooftop Units High Efficiency

MODEL NUMBER IDENTIFICATION

FEATURE HIGHLIGHTS
Lennox’ Enlight™ rooftop units featuring the Lennox® CORE Control System create a bright future through a highly energyefficient and environmentally sustainable design. Comprehensive configurations meet a wide range of applications, making it the most  flexible product line Lennox has to offer.

1. Heat Exchanger/Inshot Burners
2. Scroll Compressors
3. Environ™ Coil System
4. Outdoor Coil Fan Motors
5. Heavy Gauge Steel Cabinet
6. Hinged Access Panels
7. DirectPlus™ Direct Drive,ECM Blower System
8. Air Filters
9. Lennox® CORE Control System

APPROVALS AND WARRANTY

APPROVALS

• AHRI Standard 340/360 certified
• ETL and CSA listed
• Efficiency rating certified by CSA
• Components bonded for grounding to meet safety standards for servicing required by ETL, NEC and CEC
• All models are ASHRAE 90.1 compliant
• All models meet DOE 2023 energy efficiency standards
• All models meet California Code of Regulations, Title 24 and ASHRAE 90.1-2022 Section 6.4.3.10 requirements for staged airflow
• ISO 9001 Registered Manufacturing Quality System

WARRANTY

• Aluminized Heat Exchanger – Limited ten years
• Stainless Steel Heat Exchanger (optional) – Limited fifteen years
• Compressors – Limited five years
• Environ™ Coil System – Limited three years
• Lennox® CORE Unit Controller – Limited three years
• High Performance Economizers (optional) – Limited five years
• All other covered components – Limited one year

FEATURES AND BENEFITS

1. HEATING SYSTEM
   • Aluminized steel inshot burners
   • Direct spark ignition
   • Electronic flame sensor
   • Combustion air inducer
   • Redundant automatic dual stage gas valve with manual shut-off
   Heat Exchanger
   • Tubular construction, aluminized steel
   • Life-cycle tested
   NOTE – Optional Stainless Steel Heat Exchanger is required if mixed air temperature is below 45°F.
   Electronic Pilot Ignition
   • Electronic spark igniter provides positive direct ignition of burners on each operating cycle
   • Permits main gas valve to stay open only when the burners are proven to be lit
   • If loss of flame occurs, gas valve closes, shutting off the gas to the burners
   • LED indicates status and aids in troubleshooting
   • Watchguard circuit on module automatically resets ignition controls after one hour of continuous thermostat demand after unit lockout, eliminating nuisance service calls
   • Factory installed in the gas heating compartment Limit Controls
   • Redundant limit controls with fixed temperature setting
   • Protects heat exchanger and other components from overheating
   Safety Switches
   • Flame roll-out switch
   • Flame sensor
   • Combustion air inducer proving switch
   • Protects system operation
   Required Selections
   Gas Input Choice – Order one:
   • Standard Gas Heat, 2 Stage (84,500/130,000 Btuh)
   • Medium Gas Heat, 2 Stage (117,000/180,000 Btuh)
   • High Gas Heat, 2 Stage (156,000/240,000 Btuh)
   Options/Accessories
   Factory Installed
   Stainless Steel Heat Exchanger
   • Required if mixed air temperature is below 45°F
   Field Installed
   Bottom Gas Piping Kit
   • Allows bottom gas entry
   Low Temperature Vestibule Heater
   • Electric heater automatically controls minimum temperature in gas burner compartment when temperature is below -40°F
   • CSA certified to allow operation of unit down to -60°F
   Options/Accessories
   Field Installed
   Combustion Air Intake Extensions
   • Recommended for use with existing flue extension kits in areas where high snow areas can block intake air LPG/Propane Kits
   • Conversion kit to field change over units from Natural Gas to LPG/Propane
   Vertical Vent Extension Kit
   • Use to exhaust flue gases vertically above unit
   • Required when unit vent is too close to fresh air intakes per building codes
   • Also prevents ice formation on intake louvers
   • Kit contains vent transition, vent tee, drain cap, and installation hardware
   NOTE – Straight vent pipes (4 in. B-Vent) and caps are not furnished and must be field supplied. Refer to kit instructions for additional information.
   COOLING SYSTEM
   • Designed to maximize sensible and latent cooling performance at design conditions
   • System can operate from 0°F to 125°F without any additional controls
   R-410A Refrigerant
   • Non-chlorine based
   • Ozone-friendly

2. Compressor System
   • System consists of one two-stage scroll compressor and one single-stage scroll compressor
   • Resiliently mounted on rubber grommets for quiet operation
   Compressor Crankcase Heaters
   • Protects against refrigerant migration that can occur during low ambient operation or during extended off cycles
   Thermal Expansion Valves
   • Ensures optimal performance throughout the application range
   • Removable element head
   Filter/Driers
   • High capacity filter/drier protects the system from dirt and moisture
   High Pressure Switches
   • Protects the compressor from overload conditions such as dirty condenser coils, blocked refrigerant flow or loss of outdoor fan operation
   Low Pressure Switches
   • Protects the compressors from low pressure conditions such as low refrigerant charge or low/no airflow
   Indoor Coil Freeze Protection
   • Protects the evaporator coil from damaging ice buildup due to conditions such as low/no airflow, or low refrigerant charge

3. Condenser Coil – Environ™ Coil System
   • Lightweight, all aluminum brazed fin construction
   • Constructed of three components
   • A flat extrusion tube
   • Fins in-between the flat extrusion tube
   • Two refrigerant manifolds
   Environ™ Coil System Features:
   • Improved heat transfer performance due to high primary surface area (flat tubes) versus secondary surface (fins)
   • Smaller internal volume (reduced refrigerant charge)
   • High durability
   • All aluminum construction
   • Fewer brazed joints
   • Compact design
   • Reduced unit weight
   • Easy maintenance/cleaning
   • Mounting brackets with rubber inserts secure coil to unit providing vibration dampening and corrosion protection
   • Angled cabinet design protects coil from damage
   Evaporator Coil
   • Copper tube construction
   • Enhanced rippled-edge aluminum fins
   • Flared shoulder tubing connections
   • Silver soldered construction
   • Factory leak tested
   • Cross-row circuiting with rifled tubing
   Antimicrobial Condensate Drain Pan
   • Composite pan, sloped to meet drainage requirements per ASHRAE 62.1
   • Antimicrobial additive prevents growth of mold and mildew, which improves indoor air quality and reduces drain line blockage
   • Side or bottom drain connections
   • Reversible to allow connection at back of unit

4. Outdoor Coil Fan Motors
   • Thermal overload protected
   • Totally enclosed
   • Permanently lubricated ball bearings
   • Shaft up
   • Wire basket mount
   Outdoor Coil Fans
   • PVC coated fan guard furnished
   Required Selections
   Cooling Capacity
   • Specify nominal cooling capacity
   Options/Accessories
   Factory or Field Installed
   Condensate Drain Trap
   • Constructed of PVC (factory or field) or copper (field only)
   NOTE – Trap is field installed only; PVC version may be factory ordered to ship with unit.
   Drain Pan Overflow Switch
   • Monitors condensate level in drain pan
   • Shuts down unit if drain becomes clogged
   CABINET
   

5. Construction
   • Heavy-gauge steel panels
   • Full perimeter heavy-gauge galvanized steel base rail
   • Base rails have rigging holes
   • Three sides of the base rail have forklift slots
   • Raised edges around duct and power entry openings in the bottom of the unit for water protection
   Airflow Choice
   • Units are shipped in downflow (vertical) return air flow configuration
   NOTE – Units can be field converted to horizontal airflow with optional Horizontal Discharge Kit.
   Duct Flanges
   • Provided for horizontal duct attachment
   Power/Gas Entry
   • Electrical and gas lines can be routed through the unit base or through horizontal access knock-outs
   Exterior Panels
   • Constructed of heavy-gauge, galvanized steel
   • Textured pre-paint with polyurethane finish
   • Cyclic salt fog and UV exposure up to 1680 hours per ASTM D5894
   Insulation
   • Fully insulated with non-hygroscopic fiberglass insulation (conditioned areas)
   • Unit base is fully insulated
   • Base insulation serves as an air seal to the roof curb, eliminating the need to add a seal during installation
   

6. Hinged Access Panels
   • Tool-less access
   • Filter section
   • Blower/heating section
   • Compressor/controls section
   • Panel seals and quarter-turn latching handles provide a tight air and water seal
   Required Selections
   Airflow Configuration
   • Specify downflow or horizontal
   Options/Accessories
   Factory or Field Installed
   Return Air Adaptor Plate
   • For same size LC/LG/LH and TC/TG/TH unit replacement
   • Installs on return air opening in unit to match return air opening on existing roof curbs
   • Also see Accessory Air Resistance table
   Combination Coil/Hail Guards
   • Heavy gauge steel frame
   • Painted to match cabinet
   • Expanded metal mesh protects outdoor coil
   Factory Installed
   Corrosion Protection
   • Completely flexible immersed coating
   • Electrodeposited dry film process
   (AST ElectroFin E-Coat)
   • ASTM B117 / DIN 53167 Salt Spray – 15,000+ hours
   • ASTM G85 Annex A3 SWAAT Modified Salt Spray – 3,000 hours
   • VA Master Construction Specification Division 23 for High Humidity Installations
   • CID AA-52474A (GSA)
   • Indoor Corrosion Protection:
   • Coated coil
   • Coated reheat coil
   • Painted blower housing
   • Painted base
   • Outdoor Corrosion Protection:
   • Coated coil
   • Painted outdoor base
   Field Installed
   Horizontal Discharge Kit
   • Consists of duct covers to block off downflow supply and return air openings for horizontal applications
   • Also includes return air duct flanges for end return air when economizer is used in horizontal applications
   NOTE – When configuring unit for horizontal application with economizer, a separate Horizontal Barometric Relief Damper with Hood must be ordered separately for installation in the return air duct.
   BLOWER

7. DirectPlus™ Blower System
   • High-efficiency, variable-speed ECM (electronically commutated) motor
   • Eliminates the need for a separate variable-frequency drive
   • MSAV® Multi-Stage Air Volume control modulates the amount of supply blower airflow according to cooling demand, heating demand, ventilation demand or smoke alarm
   • The amount of airflow for each stage can be set according to a parameter in the Lennox ®CORE Unit Controller
   • Unit is shipped from the factory with preset airflows
   • Fully variable speed motor modulates to maximize system efficiency
   • Combines the motor and electronics into one unit
   • Aerodynamically optimized impeller
   • Backward curved blades mounted directly onto the rotor
   • Air inlet grill reduces indoor sound levels without affecting air performance
   Supply Static Pressure Transducer (VAV Models Only)
   • Sends information to the Lennox® CORE Unit Controller to control blower speed to the desired supply duct static pressure
   • Shipped with the unit for remote field installation in the supply duct
   Required Selections
   Blower Selection
   • MSAV® Multi-Stage Air Volume controls the speed of the blower based on the cooling and heating demands
   • VAV (Variable Air Volume) blower varies the air volume to maintain a constant supply duct static pressure
   ELECTRICAL
   SmartWire™ System
   • Keyed and color-coded wiring connectors prevent miswiring
   • Wire coloring scheme is standardized across all models
   • Each connection is intuitively labeled to make troubleshooting and servicing quick and easy
   Electrical Plugs
   • Positive connection electrical plugs are used to connect common accessories or maintenance parts for easy removal or installation
   Phase/Voltage Detection
   • Monitors power supply to assure phase is correct at unit start-up
   • If phase is incorrect, the unit will not start and an alarm code is reported to the unit controller
   • Protects unit from being started with incorrect phasing which could lead to issues such as compressors running backwards
   • Voltage detection monitors power supply voltage to assure proper voltage
   • If voltage is not correct (over/under voltage conditions) the unit will not start and an alarm code is reported to the unit controller
   Required Selections
   Voltage Choice
   • Specify when ordering base unit
   Options/Accessories
   Factory Installed
   Circuit Breakers
   • HACR type
   • For overload and short circuit protection
   • Factory wired and mounted in the power entry panel
   • Current sensitive and temperature activated
   • Manual reset
   Short-Circuit Current Rating (SCCR)
   • Higher short circuit protection up to 100kA
   NOTE – Disconnect Switch is furnished and factory installed with High SCCR option.
   Factory or Field Installed
   Disconnect Switch
   • Accessible outside of unit
   • Spring loaded weatherproof cover furnished
   GFI Service Outlets (2)
   • 115V ground fault circuit interrupter (GFCI) type options:
   • Factory installed, powered and wired
   • Factory installed, non-powered, field wired
   • Field installed, non-powered, field wired
   Field Installed
   GFI Weatherproof Cover
   • Single-gang cover
   • Heavy-duty, UV-resistant, polycarbonate case construction
   • Hinged base cover with gasket
   INDOOR AIR QUALITY

8. Air Filters
   • Disposable 2 inch MERV 4 filters furnished as standard
   Options/Accessories
   Factory or Field Installed
   Healthy Climate® High Efficiency Air Filters
   • Disposable MERV 8 and MERV 13 (Minimum Efficiency Reporting Value based on ASHRAE 52.2) efficiency 2 inch pleated filters
   Field Installed
   Healthy Climate ® High Efficiency MERV 16 Air Filters
   • Disposable MERV 16 (Minimum Efficiency Reporting Value based on ASHRAE 52.2) efficiency 2 inch pleated filters
   Healthy Climate® UVC Germicidal Light Kit
   • Germicidal lamps emit ultra-violet (UV-C) energy, which has been proven to be effective in reducing microbes such as viruses, bacteria, yeasts, and molds
   • UV-C energy greatly reduces the growth and proliferation of mold and other bioaerosols (bacteria and viruses) on illuminated surfaces (particularly coil and drain pan)
   • Destroys the organism or controls its ability to reproduce
   • Field installed in the blower/evaporator coil section
   • Magnetic safety interlock terminates power when access panels are removed
   • All necessary hardware for installation is included
   • Lamps operate on 110/230V-1ph power supply
   NOTE – Step-down transformer may be ordered separately for 460V and 575V units.
   • Approved by ETL
   Needlepoint Bipolar Ionization (NPBI) Kit
   • NPBI technology integrates with system controls for effective air treatment
   • Ionization has been shown to effectively reduce harmful pathogens, pollutants and odors
   NOTE – Please visit www.sciencedirect.com for additional information.
   • Brush-type ionizer introduces a high concentration of both positive and negative ions into the airstream
   • The bipolar ions are then dispersed into the occupied space through the duct system proactively reducing the airborne contaminants
   • Ions travel within the building air stream and attach to particles, pathogens, and gas molecules, making them larger and easier to capture in the filtration system
   • UL 2998 certified for zero ozone emission Indoor Air Quality (CO2) Sensors
   • Monitors CO2 levels
   • Reports to the Lennox® CORE Unit Controller, which adjusts economizer dampers as needed
   Replacement Filter Media Kit With Frame
   • Replaces existing pleated filter media
   • Includes washable metal mesh screen and metal frame with clip for holding replaceable non-pleated filter
   LENNOX® CORE CONTROL SYSTEM

9. The Lennox® CORE Control system is designed to accelerate equipment install and service. Standard with all Enlight™ rooftop units, control system integrates key technologies that lower installation costs, drive system efficiency, and protect your  investments.
   The Lennox® CORE Unit Controller is a microprocessorbased controller that provides flexible control of all unit functions.
   CORE Mobile Service App
   • Guided Setup with progress indicators, detailed help, and exportable summaries to manage simple, trouble-free setup, reducing commissioning times
   • Enhanced Test Functionality provides real-time sensor readings, trending, and reports that enable easy troubleshooting
   • Ability to set and configure parameters of the CORE Control System to manage sequence of operation
   • Economizer test function ensures economizer is operating correctly
   Additional Features:
   • Built-In 7-Segment Display shows Unit Status and active alarms for easy troubleshooting
   • Buttons for test and clearing delays
   • SmartWire™ System with keyed and removable screw terminals ensure correct field wiring
   • Built-in BACnet MS/TP and IP allow open integration to building management systems
   • Two-port Ethernet Switch enables daisy chaining for BACnet IP and automatic firmware updates
   NOTE – Unit Internet Connection required.
   • Profile setup copies key settings between units with the same configuration to reduce setup time
   • USB port allows a technician to download and transfer unit information to help verify service was performed
   • USB software updates on the Lennox® CORE Unit Controller enhance functionality without the need to change components
   • Unit Controller Software
   Configurable Built-In Functions
   • Discharge Air Cooling Control
   • Up to three distinct Cooling Airflows in Thermostat Mode
   • Programmable independent heating, ventilation and cooling blower speeds
   • Discharge Air Heating Control
   • Economizer Control Options (See Economizer / Exhaust Air / Outdoor Air sections)
   • Exhaust Fan Control Modes for fresh air damper position
   • Configurable Morning Warm-up
   • Night Setback Mode
   • Fresh Air Tempering for Improved Ventilation
   • Demand Control Ventilation
   • Low Ambient Controls for operation down to 0°F
   • Humiditrol™ Operation
   • Enhanced Dehumidification (Latent Demand Control without reheat)
   Component Protection / Unit Safeguards:
   • Compressor Time-Off Delay
   • Adjustable Blower On/Off Delay
   • Return Air Temperature Limit Control
   • Safety Switch Input allows Controller to respond to a external safety switch trip
   • Service Relay Output
   • Thermostat Bounce Delay
   • Smoke Alarm Mode has four choices (unit off, positive pressure, negative pressure, purge)
   • “Strike Three” Protection
   • Gas Valve Time Delay Between First and Second Stage
   • Minimum Compressor Run Time
   Control Methods / Interfaces:
   • DDC and 24V Thermostat
   • BACnet MS/TP and IP
   • LONTalk (Factory and Field Option)
   • Lennox S-BUS
   • Compatibility with Lennox Wireless Zone Sensors
   • Zone Temperature Sensor Input
   • Dehumidistat and Humidity Sensor Inputs
   • Indoor Air Quality Inputs (2)
   • Built-in Control Parameter Defaults
   • Permanent Diagnostic Code Storage
   • Field Adjustable Control Parameters (Over 200 settings)
   • Multiple Configurable Digital Inputs
   • LED Indicators
   • PC Interface connects the Lennox® CORE Unit Controller to a PC with the Lennox Unit Controller Software
   NOTE – Lennox CORE Control System features vary with the type of rooftop unit in which the control is installed.
   Controls Options
   Factory or Field Installed
   Blower Proving Switch
   • Monitors blower operation, shuts down unit if blower fails
   Dirty Filter Switch
   • Senses static pressure increase and issues alarm if necessary
   Fresh Air Tempering
   • Used in applications with high outside air requirements
   • Controller energizes the first stage heat as needed to maintain a minimum supply air temperature for comfort, regardless of the thermostat demand
   • When ordered as a factory option, sensor ships with the unit for field installation
   Smoke Detector
   • Photoelectric type
   • Installed in supply air section, return air section or both sections
   • Available with power board and single sensor (supply or return) or power board and two sensors (supply and return)
   • Power board located in unit control compartment
   Interoperability via BACnet® or LonTalk ® Protocols
   • Communication compatible with third-party automation systems that support the BACnet Application Specific Controller device profile, LonMark ® Space Comfort Controller functional profile, or LonMark Discharge Air Controller functional profile Commercial Control Systems
   Field Installed
   Thermostats
   • Control system and thermostat options, see page 13
   ECONOMIZER
   • Economizer operation is set and controlled by the Lennox® CORE Control System
   • Simple plug-in connections from economizer to control system for easy installation
   • All Enlight™ rooftop units are equipped with factory installed CEC Title 24 approved sensors for outside, return and discharge air temperature monitoring
   NOTE – Optional sensors may be used instead of unit sensors to determine whether outdoor air is suitable for free cooling. See the Options/ Accessories table.
   Factory or Field Installed

10. High Performance Economizer
    • Approved for California Title 24 building standards
    • Low leakage dampers are Air Movement and Control Association International (AMCA) Class 1A Certified – KK Maximum 3 CFM per sq. ft. leakage at 1 in. w.g.
    • ASHRAE 90.1 compliant
    • Downflow or Horizontal with Outdoor Air Hood
    • Outdoor Air Hood is included when economizer is factory installed and is furnished with economizer when ordered for field installation

11. • Downflow Barometric Relief Dampers with Exhaust Hood is also furnished
    • Linked damper action
    • High torque 24-volt fully-modulating spring return damper motor
    • Return air and outdoor air dampers
    • Plug-in connections to unit
    NOTE – High Performance Economizers are not approved for use with enthalpy controls in Title 24 applications.
    NOTE – The Free Cooling setpoint for Title 24 applications must be set based on the Climate Zone where the system is installed. See Section 140.4 “Prescriptive Requirements for Space Conditioning Systems” of the California Energy Commission’s 2022  Building Energy Efficiency Standards.
    NOTE – Refer to Installation Instructions for complete setup information.
    Factory or Field Installed
    Differential Sensible Control
    • Factory setting
    • Uses outdoor air and return air sensors that are furnished with the unit
    • The Lennox® CORE Control System compares outdoor air temperature with return air and activates the economizer when the outdoor air is below the configured setpoint and cooler than return air
    NOTE – Differential Sensible Control can be configured in the field to provide Offset Differential Sensible Control or Single Sensible Control.
    In Offset Differential Sensible Control mode, the economizer is enabled if the temperature differential (offset) between outdoor air and return air reaches the configured setpoint.
    In Single Sensible Control mode, the economizer is enabled when outdoor air temperature falls below the configured setpoint.
    Global Control
    • The unit controller communicates with a DDC system with one global sensor (enthalpy or sensible)
    • Determines whether outside air is suitable for free cooling on all units connected to the control system
    • Sensor must be field provided
    Single Enthalpy Control (Not for Title 24)
    • Outdoor air enthalpy sensor enables economizer if the outdoor enthalpy is less than the setpoint of the control
    Differential Enthalpy Control (Not for Title 24)
    • Order two Single Enthalpy Controls
    • One is field installed in the return air section
    • One is installed in the outdoor air section
    • Allows the economizer control to select between outdoor air or return air, whichever has lower enthalpy
    Field Installed
    Outdoor Air CFM Control
    • Maintains constant outdoor air volume levels on the supply air fan and varying unit airflows
    • Velocity sensor located in the rooftop unit outdoor air section, the Lennox® CORE Control System changes the economizer position to help minimize the effect of supply fan speed changes on outdoor air volume levels
    • Setpoint for outdoor air volume is established by field testing
    NOTE – Not available with Demand Control Ventilation (CO2 Sensor) or Building Pressure Control.
    Building Pressure Control
    • Maintains constant building pressure level
    • Includes a static pressure transducer and outdoor static pressure assembly
    • Using differential pressure information between the outdoor air and the building air, the Lennox® CORE Control System changes the economizer position to help maintain a constant building pressure
    NOTE – Not available with Demand Control Ventilation (CO2 Sensor) or Outdoor Air CFM Control.
    EXHAUST
    Factory or Field Installed
    Power Exhaust Fan
    • Installs internal to unit for downflow applications only with economizer option
    • Provides exhaust air pressure relief
    • Interlocked to run when supply air blower is operating
    • Fan runs when outdoor air dampers are 50% open (adjustable)
    • Motor is overload protected
    • Fan is 20 in. diameter
    • Five blades
    • One 1/3 hp motor
    NOTE – Requires Economizer and Downflow Barometric Relief Dampers.
    Field Installed
    Horizontal Low Profile Barometric Relief Dampers
    • For use when unit is configured for horizontal applications requiring an economizer
    • Allows relief of excess air
    • Aluminum blade dampers prevent blow back and outdoor air infiltration during off cycle
    • Field installed in return air duct
    • Bird screen and hood furnished
    NOTE – Requires Horizontal Discharge Kit.
    OUTDOOR AIR
    Factory or Field Installed
    Outdoor Air Damper
    • Downflow or Horizontal
    • Linked mechanical dampers
    • 0 to 25% (fixed) outdoor air adjustable
    • Installs in unit
    • Includes outdoor air hood
    • Motorized model features fully modulating spring return damper motor with plug-in connection
    • Manual model features parallel blade, gear-driven dampers with adjustable fixed position
    NOTE – Outdoor Air Hood is included when damper is factory installed and is furnished with damper when ordered for field installation.
    NOTE – Manual Outdoor Air Damper is a field installed option only.
    ROOF CURBS
    Field Installed
    • Nailer strip furnished (downflow only)
    • Mates to unit
    • US National Roofing Contractors Approved
    • Shipped knocked down
    Hybrid Roof Curbs, Downflow
    • Interlocking tabs fasten corners together
    • No tools required for assembly
    • Can also be fastened together with furnished hardware
    • Available in 8, 14, 18, and 24 inch heights
    Adjustable Pitch Curb
    • Fully adjustable pitch curbs (3/4 in. per foot in any direction) provide a level platform for rooftop units allowing flexible installations on roofs with uneven or sloped angles
    • Interlocking tabs fasten corners together
    • No tools required for assembly
    • Hardware is furnished to connect upper curb with lower curb
    • Available in 14 inch height
    Adaptor Curbs (not shown)
    • Curbs are regionally sourced
    • Dimensions vary based upon the source
    NOTE – Contact your local sales representative for a detailed cut sheet with applicable dimensions.
    CEILING DIFFUSERS
    Field Installed
    Ceiling Diffusers
    (Flush or Step-Down)
    • White powder coat finish on diffuser face and grilles
    • Insulated UL listed duct liner
    • Diffuser box has collars for duct connection
    • Step-down diffusers have double deflection blades
    • Flush diffusers have fixed blades
    • Provisions for suspending
    • Internally sealed to prevent recirculation
    • Removable return air grille
    • Adapts to T-bar ceiling grids or plaster ceilings
    Transitions (Supply and Return)
    • Used with diffusers
    • Installs in roof curb
    • Galvanized steel construction
    • Flanges furnished for duct connection to diffusers
    • Fully insulated

HUMIDITROL® DEHUMIDIFICATION SYSTEM OPTION

OVERVIEW

• Factory installed option designed to control humidity
• Provides dehumidification on demand using ASHRAE 90.1 recommended method for comfort conditioning humidity control
• Unit comes equipped with one row reheat coil, solenoid valve and humidity controller
• A thermostat with a dehumidification output, a dehumidistat, or a DDC controller with an isolated output is required to control humidity and must be located in the occupied space
  NOTE – Controls are not furnished and must be ordered separately.

BENEFITS

• Improves indoor air quality
• Helps prevents damage due to high humidity levels
• Improves comfort levels by reducing space humidity levels

OPERATION
No Dehumidification Demand

• The unit will operate conventionally whenever there is a demand for cooling or heating and no dehumidification demand
• Free cooling is only permitted when there is no demand for dehumidification

Dehumidification Demand Only

• Dehumidification is initiated by an output from a thermostat with a dehumidification output, a dehumidistat, or a DDC controller with an isolated output to control humidity
• Reheat operation will initiate on a dehumidification demand and does not require a cooling demand
• The unit will operate in the dehumidification mode until the relative humidity of the conditioned space is below the setpoint
• This reduces sensible cooling capacity and extends compressor run time to control humidity when the cooling load is low
• A solenoid valve diverts hot gas from the compressor to the reheat coil
• The cooled and dehumidified air from the evaporator is reheated as it passes through the reheat coil
• The de-superheated and partially condensed refrigerant  continues to the outdoor condenser coil where condensing is completed
• Unit will continue to operate in this mode until the dehumidification demand is satisfied

NOTE – See Sequence of Operation for additional information.

Dehumidification and Cooling Demand (Thermostat/ Room Sensor Application)

• If both a dehumidification and a full cooling load demand occur, the system will operate in cooling until the cooling demand is satisfied
• Then the system will energize the dehumidification mode

Options / Accessories
Humidity Sensor Kit

• Remote mounted dehumidistat for factory installed Humiditrol® option
• Adjustable 20-80%
  NOTE – A thermostat with a dehumidification output or a DDC controller with an isolated output can be use instead.

OPTIONAL CONVENTIONAL TEMPERATURE CONTROL SYSTEMS

CS8500 Commercial 7-Day Programmable Thermostat

• Fully Communicating Sensor
• Full Color Touchscreen Interface
• Variable Speed System Control (On Compatible Units)
• Up To 4 Heat / 4 Cool
• Built-In Sensors For Temperature, Humidity And Optional CO2
• Remote Sensor Options For Occupancy, Temperature
• BACnet Capable Options
• 5-2 or 7-Day Scheduling
• Smooth Setback Recovery
• Heat/Cool Auto-Changeover
• Four-Wire Installation
• FDD, ASHRAE, IECC Compliant

CS7500 Commercial 7-Day Programmable Thermostat

• Premium Universal Thermostat
• Full Color Touchscreen Interface
• Up To 4 Heat / 3 Cool
• Built-In Sensors For Temperature and Humidity
• Remote Sensors Options For Temperature, Discharge Air, Outdoor Air
• 5-2 or 7-Day Scheduling
• Smooth Setback Recovery
• Heat/Cool Auto-Changeover
• FDD, ASHRAE, IECC Compliant

CS3000 Commercial 5-2 Day Programmable Thermostat

• Conventional Multi-Stage Thermostat
• Intuitive Display
• Push-Button Operation
• Up To 2 Heat / 2 Cool
• Built-In Temperature Sensor
• Remote Temperature Sensing
• Up to 5-2 Day Scheduling
• Smooth Setback Recovery
• Heat/Cool Auto-changeover

Wireless/Wired Temperature/Humidity Room Sensor
(LCS-5030)

• Simple Push-Button Override
• Variable Speed System Control (On Compatible Units)
• Up To 4 Heat / 4 Cool
• AA Battery / 24VAC Powered
• Bluetooth™ Mesh Operation
• SBUS Wired Operation
• Automatic Sensor Averaging
• Locking Hex Screw

Wireless Repeater for LCS-5030

• Extends Effective Range of Wireless Sensor (LCS-5030)
• 24VAC Only
• Locking Hex Screw

NOTE – Wireless only.

Wired Temperature/Humidity Room Sensor
(Non-Communicating)

• Terminal blocks for wiring connections
• Five-wire sensor connection
• Off-white plastic enclosure
• Non-adjustable
• Relative humidity range: 0 -100%
• +/- 3% Accuracy

CS8500 Commercial 7 Day Programmable Thermostat
CS8500 7-Day Thermostat| No CO2 Sensing
With CO2 Sensing| 17G75
17G76
Sensors/Accessories| ¹ Remote non-adjustable wall-mount 10k
¹ Remote non-adjustable wall-mount 11k| 47W37
94L61
Sysbus Network Cable (Yellow) for CS8500 and LCS-5030 Wired Room Sensor
Twisted pair 100% shielded communication cable, Red and Black
22 AWG, yellow jacket, rated at 75°C, 300V, Plenum rated
Insulation – Low smoke PVC, NEC, CMP| 500 ft. box
1000 ft. box
2500  ft. roll| 27M19
94L63
68M25
CS7500 Commercial 7-Day Programmable Thermostat
CS7500 7-Day Thermostat Sensors/Accessories| ² Remote non-adjustable wall- mount 20k
² Remote non-adjustable wall-mount 10k
Remote non-adjustable discharge air (duct mount)
Outdoor temperature sensor| 24K41
47W36
47W37
19L22
X2658
CS3000 Commercial 5-2 Day Programmable Thermostat
CS3000 5-2 Day Thermostat Sensors/Accessories| Remote non-adjustable wall mount 10k averaging
Thermostat wall mounting plate| 11Y05
47W37
X2659
Universal Thermostat Guard with Lock (clear)
| Inside Dimensions (H x W x D) 5-7/8 x 8-3/8 x 3 in.| 39P21
Temperature/Humidity Room Sensors
LCS-5030 Wireless/Wired Temperature/Humidity Room Sensor| 21L07
Wireless Repeater for LCS-5030| 21L09
A335MT13AE1 Wired Temperature/Humidity Room Sensor (Non-Communicating)| 21W06

1Up to nine of the same type remote temperature sensors can be connected in parallel.
2R emote wall-mount sensors can be applied in any of the following combinations:
One Sensor – (1) 47W36, Two Sensors – (2) 47W37, Three Sensors – (2) 47W36 and (1) 47W37 Four Sensors – (4) 47W36, Five Sensors – (3) 47W36 and (2) 47W37

SEQUENCE OF OPERATION

Objective: Outline the unit functions as a result of room thermostat or zone sensor demands.
Given: When economizer is present, it will function as an integral part of the unit cooling system. When not present, unit will function as if economizer is present but outdoor ambient is high and sensed as not suitable.
UNIT OPERATION WITH 2-STAGE THERMOSTAT (2 COOL AND 2 HEAT STAGES, Y1, Y2, W1, W2) SUPPLY AIR BLOWER SPEED

Unit has following supply air blower speed setting:

• Ventilation speed
• Cooling Speed – Low
• Cooling Speed – High
• Heating speed
• Smoke speed (Used only in smoke removal option – not discussed)

1UNIT FEATURES AN ECONOMIZER AND OUTDOOR AIR IS SUITABLE
Cooling – Thermostat Mode (Y1, Y2)

Y1 Demand:
All compressors are off, supply air blower is on low cooling speed to minimize blower power consumption, economizer modulates (minimum to maximum open position) to maintain 55°F supply air temperature (default unit controller setting).

Y2 Demand:
All compressors are off, supply air blower is on high cooling speed providing higher cooling capacity, and economizer modulates to maintain 55°F supply air temperature.
If economizer stays at maximum open for 3 minutes, compressor 1 is energized while supply air blower stays on high cooling speed providing maximum cooling capacity.

1Outdoor air suitability is determined by the energy state of outdoor ambient (enthalpy or sensible) and its ability to achieve the desired free cooling effects. Outdoor air suitability can also be determined by a third party controller and provided to the rooftop unit via a network connection.

UNIT DOES NOT FEATURE AN ECONOMIZER OR OUTDOOR AIR IS NOT SUITABLE
Y1 Demand:
Compressor 1 operates and supply air blower operates at low cooling speed.
Y2 Demand:
All compressors operate and supply air blower operates at high cooling speed.

Dehumidification Mode
If a unit with Humiditrol® Dehumidification Option receives a call for dehumidification, economizer free cooling is locked out.

Call For Dehumidification, No Y1, Y2 demand:
1st stage compressor operates, supply air blower operates at low cooling speed, and the reheat valve is energized.
Y1 Demand With A Call For Dehumidification:
All compressors operate, supply air blower operates at high cooling speed and the reheat valve is energized.
Y2 Demand With A Call For Dehumidification:
All compressors operate, supply air blower operates at high cooling speed, and the reheat valve is deenergized.

UNIT OPERATION WITH 3-STAGE THERMOSTAT OR ZONE SENSOR
(3 COOL AND 2 HEAT STAGES, Y1, Y2, Y3 AND W1, W2)
SUPPLY AIR BLOWER SPEED
Unit has following supply air blower speed setting:

• Ventilation speed
• Cooling Speed – Low
• Cooling Speed – Medium
• Cooling Speed – High
• Heating speed
• Smoke speed (Used only in smoke removal option – not discussed)

¹ Unit Features An Economizer And Outdoor Air Is Suitable
Cooling – Thermostat or Zone Sensor Mode (Y1, Y2, Y3)

Y1 Demand:
All compressors are off, supply air blower is on low cooling speed to minimize blower power consumption, economizer modulates (minimum to maximum open position) to maintain 55°F supply air temperature (default unit controller setting).
Y2 Demand:
All compressors are off, supply air blower is on high cooling speed providing higher cooling capacity, and economizer modulates to maintain 55°F supply air temperature.
If economizer stays at maximum open for 3 minutes, compressor 1 is energized while supply air blower stays on high cooling speed providing maximum cooling capacity. After compressors are energized the economizer stays at maximum open.
Y3 Demand:
Compressors 1 and 2 are energized while supply air blower stays on high cooling speed.

1Outdoor air suitability is determined by the energy state of outdoor ambient (enthalpy or sensible) and its ability to achieve the desired free cooling effects. Outdoor air suitability can also be determined by a third party controller and provided to the rooftop unit via a network connection.

Unit Does Not Feature An Economizer or Outdoor Air Is Not Suitable
Y1 Demand:
Compressor 1 operates at part load and supply air blower operates at low cooling speed.
Y2 Demand:
Compressor 1 operates at part load with compressor 2 ON, and supply air blower operates at medium cooling speed.
Y3 Demand:
All compressors operate and supply air blower operates at high cooling speed.

Dehumidification Mode
If a unit with Humiditrol® Dehumidification Option receives a call for dehumidification, economizer free cooling is locked out.
Call For Dehumidification, No Y1, Y2 Demand:
1st stage compressor operates, supply air blower operates at low cooling speed, and the reheat valve is energized.
Y1 Demand With A Call For Dehumidification:
All compressors operate, supply air blower operates at medium cooling speed and the reheat valve is energized.
Y2 Demand With A Call For Dehumidification:
All compressors operate, supply air blower operates at high cooling speed and the reheat valve is energized.
Y3 Demand With A Call For Dehumidification:
All compressors operate, supply air blower operates at high cooling speed, and the reheat valve is deenergized.

HEATING MODE (GAS HEAT)
NOTE – HEATING MODE IS THE SAME FOR ALL CONTROL OPTIONS
W1 Demand:
Gas valves are open (stage 1 on units with 2-stage gas valves) and supply air blower operates at heating speed.
W2 Demand:
Gas valves are open (stage 2 on units with 2-stage gas valves) and supply air blower operates at heating speed.

OUTDOOR AIR DAMPER
The minimum damper position for “occupied low blower” and “occupied high blower” is adjusted during unit setup to provide minimum fresh air requirements per ASHRAE 62.1 at the corresponding supply air blower speeds.
When supply air blower is off or the unit is in unoccupied mode, the outdoor air damper is closed.
When unit is in occupied mode and supply air blower is operating at a speed below the “midpoint” blower speed, the outdoor air damper is at minimum “low blower” position.
When unit is in occupied mode and supply air blower is operating at a speed equal to or above the “midpoint” blower speed, the outdoor air damper is at minimum “high blower” position.

NOTE – The “midpoint” blower speed is an average of the minimum and maximum blower speed (minimum speed + maximum speed divided by 2).

POWER EXHAUST
NOTE – POWER EXHAUST OPERATION IS THE SAME FOR ALL CONTROL OPTIONS
Single-stage power exhaust fan is an option available to units with Economizer and for downflow applications only.
Power exhaust fan operates when economizer outdoor air dampers are 50% open (adjustable) and when supply air blower is ON.

UNITS IN ZONING APPLICATIONS OPERATING WITH DISCHARGE AIR CONTROL (2 HEAT / 3 COOL) SUPPLY AIR BLOWER SPEED
Unit has the following supply air blower speed settings:

• Ventilation Speed
• Cooling Speed – Fully modular based on supply duct static pressure
• Heating Speed
• Smoke Speed (Used only in smoke removal option – not discussed)

COOLING MODE
Discharge air temperature (DAT) can be used to control unit staging.
DAT default setpoint = 55ºF. Unit will stage compressors as required to maintain the setpoint when provided with Y1 thermostat demand.
Increasing compressor stages provides more cooling capacity while decreasing compressor stages provides less cooling capacity.

¹ Unit Features An Economizer And Outdoor Air Is Suitable
Y1 Demand:
All compressors are off, supply air blower operates to maintain duct static pressure, economizer modulates (minimum to maximum open position) to maintain 55°F supply air temperature (default unit controller setting).
Y2 Demand:
All compressors are off, supply air blower operates to maintain duct static pressure, and economizer modulates to maintain 55°F supply air temperature. If economizer stays at maximum open for 3 minutes, compressor 1 is energized while supply air blower  operates to maintain duct static pressure.
After compressor 1 is energized, the economizer stays at maximum open.
Y3 Demand:
Compressor 1 and 2 are energized while supply air blower operates to maintain duct static pressure.

1Outdoor air suitability is determined by the energy state of outdoor ambient (enthalpy or sensible) and its ability to achieve the desired free cooling effects. Outdoor air suitability can also be determined by a third party controller and provided to the rooftop unit via a network connection.

Unit Does Not Feature An Economizer Or Outdoor Air Is Not Suitable
Y1 Demand:
Compressor 1 operates at part load and supply air blower operates to maintain duct static pressure.
Y2 Demand:
Compressors 1 operates at part load with compressor 2 ON and supply air blower operates to maintain duct static pressure.
Y3 Demand:
All compressors operate and supply air blower operates to maintain duct static pressure.
HEATING MODE (2 Heat)
Discharge air temperature (DAT) can be used to control unit staging.
DAT default setpoint = 110ºF. Unit will stage heating as required to maintain the setpoint when provided with W1 demand.
Increasing heat stages provides more heating capacity while decreasing heat stages provides less heating capacity.
Blower operates to maintain Heating Static setpoint for all stages.
W1 Demand:
The first stage of mechanical heat is activated; gas valve one is in low fire mode. This is ~65% of heating capacity.
W2 Demand:
Gas valves are in high fire mode. This is 100% of heating capacity.

MODULATING OUTDOOR AIR DAMPER
The minimum damper position for “occupied low blower” and “occupied high blower” is adjusted during unit setup to provide minimum fresh air requirements per ASHRAE 62.1 at the corresponding supply air blower speeds.

• When supply air blower is off or the unit is in unoccupied mode, the outdoor air damper is closed.
• When unit is in occupied mode and supply air blower is operating at a speed below the “midpoint” blower speed, the outdoor air damper is at minimum “low blower” position.
• When unit is in occupied mode and supply air blower is operating at a speed equal to or above the “midpoint” blower speed, the outdoor air damper is at minimum “high blower” position.

NOTE – The “midpoint” blower speed is an average of the minimum and maximum blower speed (minimum speed + maximum speed) divided by 2.

OPTIONS / ACCESSORIES

COOLING SYSTEM

Condensate Drain Trap| PVC
Copper| 22H54
76W27
| OX| OX| OX| OX
---|---|---|---|---|---|---
X| X| X| X
Drain Pan Overflow Switch| | 21Z07| OX| OX| OX| OX

HEATING SYSTEM

180,000 Btuh
240,000 Btuh| Factory| O| O| O| O
Factory| O| O| O| O
Factory| O| O| O| O
Low Temperature Vestibule Heater| 208/230V-3ph
460V
575V| 22A51| X| X| X| X
22A55| X| X| X| X
13X65| X| X| X| X
LPG/Propane Conversion Kits| Standard Heat
Medium Heat
High Heat| 14N22| X| X| X| X
14N23| X| X| X| X
14N25| X| X| X| X
Stainless Steel Heat Exchanger| Factory| O| O| O| O
Vertical Vent Extension Kit| 42W16| X| X| X| X

BLOWER – SUPPLY AIR

DirectPlus™ Blower System with MSAV®
DirectPlus™ Blower System with VAV| Factory
Factory| O| O| O| O
---|---|---|---|---|---
O| O| O| O

CABINET

CONTROLS

Commercial Controls
CPC Einstein Integration LonTalk® Module Novar® LSE| Factory
54W27
Factory
| O| O| O| O
OX| OX| OX| OX
O| O| O| O
Dirty Filter Switch| 53W67| OX| OX| OX| OX
Fresh Air Tempering| 21Z08| OX| OX| OX| OX
Smoke Detector – Supply or Return (Power board and one sensor)| 11K76| OX| OX| OX| OX
Smoke Detector – Supply and Return (Power board and two sensors)| 11K80| OX| OX| OX| OX

NOTE – Catalog and model numbers shown are for ordering field installed accessories.
OX – Configure To Order (Factory Installed) or Field Installed
O = Configure To Order (Factory Installed)
X = Field Installed

INDOOR AIR QUALITY

Air Filters

Healthy Climate® High Efficiency Air Filters
20 x 25 x 2 (Order 4 per unit)| MERV 8
MERV 13
MERV 16| 50W61
52W41
21U41| OX| OX| OX| OX
---|---|---|---|---|---|---
OX| OX| OX| OX
X| X| X| X
Replacement Media Filter With Metal Mesh Frame
(includes non-pleated filter media)| Y3063| X| X| X| X

Indoor Air Quality (CO2) Sensors

Sensor – Wall-mount, off-white plastic cover with LCD display| 77N39| X| X| X| X
---|---|---|---|---|---
Sensor – Wall-mount, off-white plastic cover, no display| 23V86| X| X| X| X
Sensor – Black plastic case with LCD display, rated for plenum mounting| 87N52| X| X| X| X
Sensor – Wall-mount, black plastic case, no display, rated for plenum mounting| 87N54| X| X| X| X
CO2 Sensor Duct Mounting Kit – for downflow applications| 85L43| X| X| X| X
Aspiration Box – for duct mounting non-plenum rated CO2 sensors ( 77N39 )| 90N43| X| X| X| X

Needlepoint Bipolar Ionization (NPBI)

UVC Germicidal Lamps

ELECTRICAL

Voltage 60 Hz| 208/230V – 3 phase
460V – 3 phase
575V – 3 phase| Factory| O| O| O| O
---|---|---|---|---|---|---
Factory| O| O| O| O
Factory| O| O| O| O
HACR Circuit Breakers| Factory| O| O| O| O
² Short-Circuit Current Rating (SCCR) of 100kA (includes Phase/Voltage Detection)| Factory| O| O| O| O
Disconnect Switch| 80 amp| 54W56| OX| OX| OX| OX
GFI Service Outlets| 15 amp non-powered, field-wired (208/230V, 460V only)
15 amp factory-wired and powered (208/230V, 460V only)
³ 20 amp non-powered, field-wired (208/230V, 460V, 575V)
³ 20 amp non-powered, field-wired (575V)| 74M70| OX| OX| OX| OX
Factory| O| O| O| O
67E01| X| X| X| X
Factory| O| O| O| O
Weatherproof Cover for GFI| 10C89| X| X| X| X

1Lamps operate on 110-230V single-phase power supply. Step-down transformer may be ordered separately for 460V and 575V units. Alternately, 110V power supply may be used to directly power the UVC ballast(s).
2 Disconnect Switch is furnished and factory installed with High SCCR option.
3 Canada requires a minimum 20 amp circuit. Select 20 amp, non-powered, field wired GFI.

NOTE – Catalog and model numbers shown are for ordering field installed accessories.
OX – Configure To Order (Factory Installed) or Field Installed
O = Configure To Order (Factory Installed)
X = Field Installed

ECONOMIZER
High Performance Economizer (Approved for California Title 24 Building Standards / AMCA Class 1A Certified)

High Performance Economizer (Downflow or Horizontal
Includes Economizer Dampers with Outdoor Air Hood and Downflow Barometric Relief Dampers with Exhaust Hood
Downflow Applications – Use furnished Outdoor Air Hood – Order Downflow Barometric Relief
Dampers and Exhaust Hood separately Horizontal Applications – Use furnished Outdoor Air Hood – Order Horizontal Low Profile
Barometric Relief Dampers with Exhaust Hood and Horizontal Discharge Kit separately| 20U80| OX| OX| OX| OX
---|---|---|---|---|---

Horizontal Barometric Relief Dampers

Economizer Controls

OUTDOOR AIR
Outdoor Air Dampers With Outdoor Air Hood

POWER EXHAUST

Standard Static| 208/230V-3ph
460V-3ph
575V-3ph| 53W45
53W44
53W46
| OX| OX| OX| OX
---|---|---|---|---|---|---
OX| OX| OX| OX
OX| OX| OX| OX

HUMIDITROL® CONDENSER REHEAT OPTION

ROOF CURBS
Hybrid Roof Curbs, Downflow

Adjustable Pitch Curb, Downflow

CEILING DIFFUSERS

Step-Down – Order one| RTD11-95S
RTD11-135S
RTD11-185S| 13K61
13K62
13K63
| X| | |
---|---|---|---|---|---|---
| X| X|
| | | X
Flush – Order one| FD11-95S
FD11-135S
FD11-185S| 13K56
13K57
13K58| X| | |
| X| X|
| | | X
Transitions (Supply and Return) – Order one| C1DIFF30B-1
C1DIFF31B-1
C1DIFF32B-1| 12X65
12X66
12X67| X| | |
| X| X|
| | | X

NOTE – Catalog and model numbers shown are for ordering field installed accessories.
OX – Configure To Order (Factory Installed) or Field Installed
O = Configure To Order (Factory Installed)
X = Field Installed

SPECIFICATIONS

General Data                                Nominal Tonnage| 7.5 Ton| 8.5 Ton| 10 Ton| 12.5 Ton
---|---|---|---|---
Efficiency Type| High| High| High| High
Model Number| LGT092H4E| LGT102H4E| LGT120H4E| LGT150H4E
Blower Type| DirectPlus™ ECM Direct Drive with MSAV®| DirectPlus™ ECM Direct Drive with MSAV®| DirectPlus™ ECM Direct Drive with MSAV®| DirectPlus™ ECM Direct Drive with MSAV®
Cooling Gross Cooling Capacity – Btuh| 93,000| 101,000| 117,000| 141,000
Performance 1 Net Cooling Capacity – Btuh| 90,000| 98,000| 114,000| 136,000
1 AHRI Rated Air Flow – cfm| 3000| 3400| 3400| 4100
Total Unit Power – kW| 7.5| 8.1| 9.5| 12.5
1 IEER (Btuh/Watt)| 15.7| 15.7| 15.5| 14.6
1 EER (Btuh/Watt)| 12.3| 12.1| 12.1| 10.8
Refrigerant Refrigerant Type| R-410A| R-410A| R-410A| R-410A
Charge Without Reheat                   Circuit 1| 7 lbs. 0 oz.| 7 lbs. 0 oz.| 7 lbs. 0 oz.| 7 lbs. 4 oz.
Option                                 Circuit 2| 7 lbs. 0 oz.| 7 lbs. 6 oz.| 7 lbs. 0 oz.| 7 lbs. 0 oz.
With Reheat                        Circuit 1| 7 lbs. 4 oz.| 7 lbs. 4 oz.| 7 lbs. 4 oz.| 7 lbs. 8 oz.
Option                                 Circuit 2| 7 lbs. 0 oz.| 7 lbs. 6 oz.| 7 lbs. 0 oz.| 7 lbs. 0 oz.
Gas Heating Options Available| | See p| ge 25|
Compressor Type (number)| | Two-Stag| e Scroll (1)|
Single-Stage Scroll (1)
Outdoo r Coils| Net face area (total) – sq. ft.| 28.0| 28.0| 28.0| 28.0
| Number of rows| 1| 1| 1| 1
| Fins per inch| 23| 23| 23| 23
Outdoor| Motor – (No.) HP| 2 (1/3)| 2 (1/3)| 2 (1/2)| 2 (1/2)
Coil Fans| Motor rpm| 1075| 1075| 1075| 1075
| Total Motor watts| 860| 860| 1000| 1000
| Diameter – (No.) in.| (2) 24| (2) 24| (2) 24| (2) 24
| Number of blades| 3| 3| 3| 3
| Total Air volume – cfm| 9000| 9000| 9700| 9700
Indoor| Net face area (total) – sq. ft.| 12.78| 12.78| 12.78| 12.78
Coil| Tube diameter – in.| 3/8| 3/8| 3/8| 3/8
| Number of rows| 4| 4| 4| 4
| Fins per inch| 14| 14| 14| 14
General Data| Nominal Tonnage| 7.5 Ton| 8.5 Ton| 10 Ton| 12.5 Ton
---|---|---|---|---|---
| Efficiency Type| High| High| High| High
| Model Number| LGT092H4P| LGT102H4P| LGT120H4P| LGT150H4P
| Blower Type| DirectPlus™ ECM Direct Drive with VAV| DirectPlus™ ECM Direct Drive with VAV| DirectPlus™ ECM Direct Drive with VAV| DirectPlus™ ECM Direct Drive with VAV
Cooling| Gross Cooling Capacity – Btuh| 93,000| 101,000| 117,000| 141,000
Performance| 1 Net Cooling Capacity – Btuh| 90,000| 98,000| 114,000| 136,000
| 1 AHRI Rated Air Flow – cfm| 3000| 3400| 3400| 4100
| Total Unit Power – kW| 7.5| 8.1| 9.5| 12.5
| 1 IEER (Btuh/Watt)| 14.6| 14.6| 14.6| 14.0
| 1 EER (Btuh/Watt)| 12.3| 12.1| 12.1| 10.8
Refrigerant| Refrigerant Type| R-410A| R-410A| R-410A| R-410A
Charge| Without Reheat                   Circuit 1| 7 lbs. 0 oz.| 7 lbs. 0 oz.| 7 lbs. 0 oz.| 7 lbs. 4 oz.

NOTE – Net capacity includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
1AHRI Certified to AHRI Standard 340/360; 95°F outdoor air temperature and 80°F db/67°F wb entering evaporator air; minimum external duct static pressure.

RATINGS

NOTE − For Temperatures and Capacities not shown in tables, see bulletin − Cooling Unit Rating Table Correction Factor Data in Miscellaneous Engineering Data section.

7.5 TON – LGT092H4E/P (1 COMPRESSOR – PART LOAD)

7.5 TON – LGT092H4E/P (2 COMPRESSORS – PART LOAD / FULL LOAD)

7.5 TON – LGT092H4E/P (2 COMPRESSORS – FULL LOAD)

8.5 TON – LGT102H4E/P (1 COMPRESSOR – PART LOAD)

8.5 TON – LGT102H4E/P (2 COMPRESSORS – PART LOAD / FULL LOAD)

8.5 TON – LGT102H4E/P (2 COMPRESSORS – FULL LOAD)

10 TON – LGT120H4E/P (1 COMPRESSOR – PART LOAD)

10 TON – LGT120H4E/P (2 COMPRESSORS – PART LOAD / FULL LOAD)

10 TON – LGT120H4E/P (2 COMPRESSORS – FULL LOAD)

12.5 TON – LGT150H4E/P (1 COMPRESSOR – PART LOAD)

12.5 TON – LGT150H4E/P (2 COMPRESSORS – PART LOAD / FULL LOAD)

12.5 TON – LGT150H4E/P (2 COMPRESSORS – FULL LOAD)

HUMIDITROL DEHUMIDIFICATION SYSTEM RATINGS

7.5 TON – LGT092H4E WITH HUMIDITROL® OPERATING (PART LOAD)

7.5 TON – LGT092H4E WITH HUMIDITROL® OPERATING (FULL LOAD)

8.5 TON – LGT102H4E WITH HUMIDITROL® OPERATING (PART LOAD)

8.5 TON – LGT102H4E WITH HUMIDITROL® OPERATING (FULL LOAD)

10 TON – LGT120H4E WITH HUMIDITROL® OPERATING (PART LOAD)

10 TON – LGT120H4E WITH HUMIDITROL® OPERATING (FULL LOAD)

12.5 TON – LGT150H4E WITH HUMIDITROL® OPERATING (PART LOAD)

12.5 TON – LGT150H4E WITH HUMIDITROL® OPERATING (FULL LOAD)

BLOWER DATA

BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY (NO HEAT SECTION) WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:

1 − Wet indoor coil air resistance of selected unit.
2 − Any factory installed options air resistance (heat section, Economizer, etc.)
3 − Any field installed accessories air resistance (duct resistance, diffuser, etc.)
See page 33 for wet coil and option/accessory air resistance data.

Maximum Static Pressure With Gas Heat – 2.0 in. w.g.
Minimum Air Volume Required For Different Gas Heat Sizes:
Standard – 2150 cfm; Medium – 2250 cfm; High – 2600 cfm

FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORY AIR RESISTANCE – in. w.g.

POWER EXHAUST FAN PERFORMANCE

CEILING DIFFUSERS AIR RESISTANCE – in. w.g.

| RTD11 Step-Down Diffuser| FD11 Flush Diffuser
---|---|---
Unit Size| Air Volume cfm| 2 Ends Open| 1 Side, 2 Ends
Open| All Ends & Sides
Open
092 Models| 2400| 0.21| 0.18| 0.15| 0.14
2600| 0.24| 0.21| 0.18| 0.17
2800| 0.27| 0.24| 0.21| 0.20
3000| 0.32| 0.29| 0.25| 0.25
3200| 0.41| 0.37| 0.32| 0.31
3400| 0.50| 0.45| 0.39| 0.37
3600| 0.61| 0.54| 0.48| 0.44
3800| 0.73| 0.63| 0.57| 0.51
102 & 120 Models| 3600| 0.36| 0.28| 0.23| 0.15
3800| 0.40| 0.32| 0.26| 0.18
4000| 0.44| 0.36| 0.29| 0.21
4200| 0.49| 0.40| 0.33| 0.24
4400| 0.54| 0.44| 0.37| 0.27
4600| 0.60| 0.49| 0.42| 0.31
4800| 0.65| 0.53| 0.46| 0.35
5000| 0.69| 0.58| 0.50| 0.39
5200| 0.75| 0.62| 0.54| 0.43
150 Models| 4200| 0.22| 0.19| 0.16| 0.10
4400| 0.28| 0.24| 0.20| 0.12
4600| 0.34| 0.29| 0.24| 0.15
4800| 0.40| 0.34| 0.29| 0.19
5000| 0.46| 0.39| 0.34| 0.23
5200| 0.52| 0.44| 0.39| 0.27
5400| 0.58| 0.49| 0.43| 0.31
5600| 0.64| 0.54| 0.47| 0.35
5800| 0.70| 0.59| 0.51| 0.39

CEILING DIFFUSER AIR THROW DATA

ELECTRICAL DATA

Model No.| | LGT102H4E / LGT102H4P|
---|---|---|---
1 V oltage – 60Hz| 208/230V-3ph| 460V-3ph| 575V- 3ph
Compressor 1                                Rated Load Amps| 12.9| 7.1| 4.6
(Non-Inverter)                             Locked Rotor Amps| 105| 62| 39
Compressor 2                                Rated Load Amps| 13.7| 6.1| 4.8
(Non-Inverter)                             Locked Rotor Amps| 83.1| 43| 33
Outdoor Fan                Full Load Amps (2 Non-ECM) Motors (2)| 2.4| 1.3| 1
Power Exhaust                                  Full Load Amps

(1) 0.33 HP

| 2.4| 1.3| 1
Service Outlet 115V GFI (amps)| 15| 15| 20
Indoor Blower                                         Horsepower| 3.75| 3.75| 3.75
Motor                                                 Full Load Amps| 8.8| 4.3| 3.4
2 Maximum                                                  Unit Only| 50| 25| 20
Overcurrent                                   With (1) 0.33 HP Protection (MOCP)                          Power Exhaust| 50| 30| 20
3 Minimum                                                   Unit Only| 44| 22| 16
Circuit                                            With (1) 0.33 HP Ampacity (MCA)                              Power Exhaust| 47| 24| 17

NOTE – All units have a minimum Short Circuit Current Rating (SCCR) of 5000 amps.
1Extremes of operating range are plus and minus 10% of line voltage.
2 HACR type breaker or fuse.
3 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Model No.| | LGT120H4E / LGT120H4P|
---|---|---|---
1 V oltage – 60Hz| 208/230V-3ph| 460V-3ph| 575V- 3ph
Compressor 1                                Rated Load Amps| 16.7| 7.1| 5.7
(Non-Inverter)                             Locked Rotor Amps| 110| 54.7| 47.8
Compressor 2                                Rated Load Amps| 16| 7.8| 5.7
(Non-Inverter)                             Locked Rotor Amps| 110| 52| 38.9
Outdoor Fan                Full Load Amps (2 Non-ECM) Motors (2)| 3| 1.5| 1.2
Power Exhaust                                  Full Load Amps

(1) 0.33 HP

| 2.4| 1.3| 1
Service Outlet 115V GFI (amps)| 15| 15| 20
Indoor Blower                                         Horsepower| 3.75| 3.75| 3.75
Motor                                                 Full Load Amps| 8.8| 4.3| 3.4
2 Maximum                                                  Unit Only| 60| 30| 20
Overcurrent                                   With (1) 0.33 HP Protection (MOCP)                          Power Exhaust| 70| 30| 25
3 Minimum                                                   Unit Only| 52| 25| 19
Circuit                                            With (1) 0.33 HP Ampacity (MCA)                              Power Exhaust| 55| 26| 20

NOTE – All units have a minimum Short Circuit Current Rating (SCCR) of 5000 amps.
1Extremes of operating range are plus and minus 10% of line voltage.
2HACR type breaker or fuse.
3 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

3ph**
Compressor 1| Rated Load Amps| 17.6| 8.5| 6.3
(Non-Inverter)| Locked Rotor Amps| 136| 66.1| 55.3
Compressor 2| Rated Load Amps| 22.6| 10| 7.5
(Non-Inverter)| Locked Rotor Amps| 166.2| 74.6| 54
Outdoor Fan| Full Load Amps (2 Non-ECM)| 3| 1.5| 1.2
Motors (2)|
Power Exhaust| Full Load Amps| 2.4| 1.3| 1
(1) 0.33 HP|
Service Outlet 115V GFI (amps)| 15| 15| 20
Indoor Blower| Horsepower| 3.75| 3.75| 3.75
Motor| Full Load Amps| 8.8| 4.3| 3.4
2 Maximum| Unit Only| 80| 35| 25
Overcurrent| With (1) 0.33 HP| 80| 35| 25
Protection (MOCP)| Power Exhaust
3 Minimum| Unit Only| 61| 29| 22
Circuit| With (1) 0.33 HP| 64| 30| 23
Ampacity (MCA)| Power Exhaust

NOTE – All units have a minimum Short Circuit Current Rating (SCCR) of 5000 amps.
1 Extremes of operating range are plus and minus 10% of line voltage.
2 HACR type breaker or fuse.
3 Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

FIELD WIRING NOTES

• For use with copper wiring only
• Field wiring not furnished
• All wiring must conform to NEC or CEC and local electrical codes
• For specific wiring information, please refer to the installation instructions

UNIT CLEARANCES

1 Unit Clearance| A| B| C| D| T op Clearance
---|---|---|---|---|---
in.| mm| in.| mm| in.| mm| in.| mm
Service Clearance| 60| 1524| 36| 914| 36| 934| 60| 1524| Unobstructed
Clearance to Combustibles| 36| 914| 1| 25| 1| 25| 1| 25
Minimum Operation Clearance| 36| 914| 36| 914| 36| 914| 36| 914

NOTE – Entire perimeter of unit base requires support when elevated above the mounting surface.
1Service Clearance – Required for removal of serviceable parts.
Clearance to Combustibles – Required clearance to combustible material.
Minimum Operation Clearance – Required clearance for proper unit operation.

OUTDOOR SOUND DATA

Unit
Model Number| Octave Band Sound Power Levels dBA, re 10    Watts – Center Frequency – Hz| Sound Rating Number (dBA)
---|---|---
125| 250| 500| 1000| 2000| 4000| 8000
092, 102| 76| 79| 84| 83| 79| 73| 66| 88
120, 150| 70| 77| 85| 84| 80| 78| 76| 89

Note – The octave sound power data does not include tonal corrections.
1 Sound Rating Number according to AHRI Standard 370-2001 (includes pure tone penalty). Sound Rating Number is the overall A-Weighted Sound Power Level, (LWA), dBA (100 Hz to 10,000 Hz).

WEIGHT DATA

WEIGHT DATA

W E I G H T DATA

| Shipping Weight
lbs.| kg
ECONOMIZE R  / OUTDOOR AI R / EXHAUST

Economizer

Outdoor Air Dampers

GA S HEAT EXCHANGER (NET WEIGHT)
Medium Heat (adder over standard heat)| 9| 5
High Heat (adder over standard heat)| 32| 15
COMBIN ATION COIL/HAIL G U ARDS
All models| 55| 25
ROO F CURBS

Hybrid Roof Curbs, Downflow

Adjustable Pitch Curb, Downflow

CEILIN G DIFFUSERS
Step-Down| RTD11-95S| 118| 54
RTD11-135S| 135| 61
RTD11-185S| 168| 76
Flush| FD11-95S| 118| 54
FD11-135S| 135| 61
FD11-185S| 168| 76
Transitions| C1DIFF30B-1| 30| 14
C1DIFF31B-1| 32| 15
C1DIFF32B-1| 36| 16
HUMIDITROL ® DEHUMIDIFIC ATION S Y STE M
Humiditrol® Dehumidification Option| 20| 9

DIMENSIONS

Base Unit – The unit with NO INTERNAL OPTIONS.
Max. Unit – The unit with ALL INTERNAL OPTIONS Installed. (Economizer, Standard Static Power Exhaust Fans, Controls, etc.). Does not include accessories external to unit or high static power exhaust.

ACCESSORIES

OUTDOOR AIR HOOD DETAIL

HORIZONTAL ECONOMIZER APPLICATION
(With Furnished Barometric Relief Dampers and Optional Horizontal Discharge Kit – Required)

NOTE – Return Air Duct and Transition must be supported.

BAROMETRIC RELIEF DAMPERS
(Furnished with Economizer)

HORIZONTAL ECONOMIZER APPLICATION
(with Optional Low Profile Horizontal Barometric Relief Dampers and Horizontal Discharge Kit – Required)

HORIZONTAL LOW PROFILE BAROMETRIC RELIEF DAMPERS
(Field installed in horizontal return air duct adjacent to unit)

HYBRID ROOF CURBS – DOUBLE DUCT OPENING

TYPICAL FLASHING DETAIL FOR ROOF CURB

DETAIL ROOF CURB

ADJUSTABLE PITCH CURBS – DOUBLE DUCT OPENING

ROOF CURBS WITH SUPPLY & RETURN AIR TRANSITIONS FOR CEILING DIFFUSERS

COMBINATION CEILING SUPPLY AND RETURN DIFFUSERS

STEP-DOWN CEILING DIFFUSER

FLUSH CEILING DIFFUSER

REVISIONS

Visit us at www.Lennox.com
For the latest technical information, www.LennoxCommercial.com
Contact us at 1-800-4-LENNOX

NOTE – Due to Lennox’ ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability.
Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.
Installation and service must be performed by a qualified installer and servicing agency.
©2024 Lennox Industries, Inc.

References

• Lennox
• Commercial Air Conditioning & Heating Units | Lennox Commercial

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