LCA/LGA ENGINEERING DATA 036, 042, 048, 060 and 072 …

1 036, 042, 048, 060 and 072 Models3 to 6 Ton ( to kW)LCA/LGAB ulletin No. 210232 May 1999 Supersedes July 1998 LCA Packaged Cooling and Electric Heat LGA Packaged Cooling and Gas HeatCooling Capacity - 35,800 to 72,000 Btuh ( to kW)Gas Input Heating Capacity - 78,000 to 125,000 ( to kW)Optional Electric Heat - 7 to 30 kWPACKAGED L SERIESENGINEERINGDATAT able of ContentsFeaturesPage OptionsPage Installed Only OptionsPage or Factory Installed AccessoriesPage Installed Only OptionsPage Control SystemsPage Control Selection FlowchartsPage WiringPage Number IdentificationPage - LCA/LGAPage DataPage Altitude Derate LGA ModelsPage DataPage Electric Heat AccessoriesPage Heat Data - LCA036-042-048 Page Heat Data - LCA060 Page Heat Data - LCA072 Page RatingsPage ClearancesPage DataPage SpecificationsPage - LCA ModelsPage - LGA ModelsPage - AccessoriesPage (Standard EfficiencyCooling & Electric Heat)Shown With Optional Economizerand Electric HeatVERIFIEDENERGYPERFORMANCELGA060H(Hig h EfficiencyCooling & Gas Heat)Shown With Optional EconomizerNOTE - Due to Lennox ongoing committment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurringliability.

2 1999 Lennox Industries Flow Choice Bottom (down-flow) or horizontal (side) supply and return airStandardStandardStandardStandardStand ardBottom Power Entry For electrical linesStandardStandardStandardStandardSta ndardCabinet Heavy gauge galvanized steel, fully insulated, powdered enamel paintfinish, large removeable access panels, electrical inlets in cabinet base andelectric heat end panel (LCA only), easy access control area with factoryinstalled controls, low voltage terminal strip, unit lifting holes in base railStandardStandardStandardStandardStan dardCabinet Access Panels 1 heating area access panel, 2 blower access panels,1 hinged compressor/controls access panel and 1 hinged air filter/economizeraccess panel with tool-less access handles, gaskets on all edges for tight seal,blower access panels and air filter/economizer access panel are insulatedwith fiberglass Construction Copper tube construction, ripple-edged enhanced alumi-num fins, flared shoulder tubing connections, silver soldered construction, fac-tory tested, indoor coil drain connection extends outside of unit cabinetStandardStandardStandardStandardS tandardCompressor Crankcase HeaterStandardStandardStandardStandardSt andardFilters Disposable 2 inch (51 mm)

3 Pleated commercial gradeStandardStandardStandardStandardSta ndardFilter Access Hinged filter door with tool-less access handlesStandardStandardStandardStandardS tandardIntegrated Modular Control (IMC) Solid-state board contains all controls andcontrol relays to operate unitBuilt-in Functions Include:Blower On/Off DelayBuilt-in Control Parameter Defaults -ensures proper unit operationwhen power is restored after power failureService Relay OutputDefrost Control- heat pump models onlyDehumidification Control -monitors humidity levels, will allow bothheating and cooling to operate at the same time, as needed, requiresoptional field installed DehumidistatDirty Filter Switch Input- requires optional field installed Dirty FilterSwitchEconomizer Control -four modes of operation (outdoor enthalpy,differential enthalpy, temperature and global)Electric Heat Staging -regulates electric heat during building warm-upETM Compatible -various modules (see factory or field installed accessories)

4 Extensive Unit Diagnostics -80 diagnostic codesPermanent Diagnostic Code StorageField Changeable Control Parameters- 114 different parametersGas Valve Delay Between First and Second StageIndoor Air Quality Input -monitors CO2levels, adjusts economizerdampers as needed (four modes of operation), requires optional fieldinstalled Indoor Air Quality (CO2) SensorLow Ambient Controls- Allows unit cooling operation down to 0EF( )Minimum Run TimeNight Setback Mode -adjusts setpoint, closes outdoor air dampers andoperates blower on demand, may be customized for special requirementsReturn Air Temperature Limit ControlSmoke Alarm Mode -four modes of operation Strike Three Low Pressure Control -protects system from low suctionpressure while eliminating nuisance faultsThermostat Bounce DelayThree Digit Display -Displays: outdoor temperature, supply airtemperature, return air temperature (temperatures in F or C),economizer damper position, Indoor Air Quality, control Stage Heat/Three Stage Cool Thermostat CompatibleWarm-up Mode -four modes of operationStandardStandardStandardStandar dStandardOutdoor Coil Fan PVC coated fan guard furnishedStandardStandardStandardStandar dStandardOutdoor Coil Fan Motor Overload protected, permanently lubricated,equipped with ball bearings, shaft up, wire basket mountStandardStandardStandardStandardSta ndardSupply Air Blower Choice Direct drive or belt drive (belt drive - ball bearingsand adjustable pulley for speed change), forward curved blades, blower wheelstatically and dynamically DriveStandardDirect DriveStandardDirect DriveStandardDirect DriveStandardBelt DriveStandardSupply Air Motor (Standard Efficiency) Overload protected, equipped with ballbearings (belt drive) or sleeve bearings (direct drive)

5 StandardStandardStandardStandardStandard Transformer 70VA transformer with built-in circuit breakerStandardStandardStandardStandardS tandardL Series 036-072/ Page 2 FEATURES-LCAM odelsItemLCA/LGA036 LCA/LGA042 LCA/LGA048 LCA/LGA060 LCA/LGA072 Approvals and listed, efficiency rating verified by , compo-nents bonded for grounding to meet safety standards for servicing required , and National and Canadian Electrical CodesStandardStandardStandardStandardSta ndardARI Ratings Ratings in accordance with ARI Standard 210/240-94 and certi-fied to ARIS tandardStandardStandardStandardStandardC ompressors Reciprocating type, resiliently mounted on rubber grommets S Models S Models S Models S Models----Compressors CopelandXCompliant ScrollZfor high efficiency, resilientlymounted on rubber grommets H Models H Models H Models H Models S Models & H ModelsOutdoor Coil Construction FormedtypeStandardStandardStandardStanda rdStandardRefrigeration System Consists of.

6 Compressor, condenser coil and directdrive fan, evaporator coil and belt or direct drive blower, expansion valve withreplaceable thermostatic element, high capacity drier, high pressure switch,low pressure switch, full refrigerant charge, crankcase heater, freezestat (pre-vent coil freeze-up during low ambient operation or loss of air) and low ambientswitch for operation down to 0 F (-18 C)StandardStandardStandardStandardStanda rdWarranty Limited five years compressor, limited one year all other coveredcomponents, see limited warranty certificate included with unit for detailsStandardStandardStandardStandardS tandardFEATURES-LGAM odelsItemLCA/LGA036 LCA/LGA042 LCA/LGA048 LCA/LGA060 LCA/LGA072 Approvals certified as combination heating/cooling unit for out-door installation, efficiency rating verified by , bonded for grounding tomeet safety standards for servicing required by and National andCanadian Electrical CodesStandardStandardStandardStandardSta ndardARI Ratings Ratings in accordance with ARI Standard 210/240-94 and certi-fied to ARIS tandardStandardStandardStandardStandardC ompressors Reciprocating type, resiliently mounted on rubber grommets S Models S Models S Models S Models----Compressors CopelandXCompliant ScrollZfor high efficiency.

7 Resilientlymounted on rubber grommets H Models H Models H Models H Models S Models & H ModelsFan and Limit Controls Factory installed, 90 second fan on time delay, duallimit controls (primary and secondary) with fixed temperature settingStandardStandardStandardStandardS tandardooHeat Exchanger Tubular construction, aluminized steel, lifecycle testedStandardStandardStandardStandardSt andardOutdoor Coil Construction FormedtypeStandardStandardStandardStanda rdStandardHeating System Aluminized steel inshot burners, direct spark ignition, elec-tronic flame sensor, redundant automatic single or dual gas valve with manualshut-off, induced draft blower, flame rollout switchStandardStandardStandardStandardSt andardRefrigeration System Consists of: compressor, condenser coil and directdrive fan, evaporator coil and belt or direct drive blower, expansion valve withreplaceable thermostatic element, high capacity drier, high pressure switch,low pressure switch, full refrigerant charge, crankcase heater, freezestat (pre-vent coil freeze-up during low ambient operation or loss of air) and low ambientswitch for operation down to 0 F (-18 C)StandardStandardStandardStandardStanda rdWarranty Limited ten years heat exchanger, limited five years compressor, oneyear all other covered components, see limited warranty certificate included withunit for detailsStandardStandardStandardStandardS tandardoOptional stainless steel heat exchanger required if mixed air temperature is below 45 (7 ).

8 L Series 036-072/ Page 3 REQUIREDOPTIONS-ITEMSMUSTBEORDEREDANDFAC TORYINSTALLEDAir Flow Configuration specify horizontal or down-flow when ordering base unitSupply Air Motor Order one, belt drive or direct drive (See Blower Data Table for specifications):Standard Efficiency Overload protected, equipped with ball bearings (belt drive motors) or sleeve bearings (direct drive motors)High Efficiency Overload protected, equipped with ball bearings (belt drive motors only), 3 phase onlyDrive Kit Order one, belt drive only, see Drive Kit Specifications TableGas Input (LGA Models Only) Order one:78,000 Btuh ( kW) Standard Heat Gas Input92,000/125,000 Btuh ( kW) Dual Heat Gas Input125,000 Btuh ( kW) High Heat Gas InputOPTIONALACCESSORIESFACTORYINSTALLED ONLYItemLCA/LGA036 LCA/LGA042 LCA/LGA048 LCA/LGA060 LCA/LGA072 Cold Weather Kit (Canada Only) Electric heater automatically controls mini-mum temperature in gas burner compartment when temperature is below -40EF(-40EC).

9 Certified to allow operation of unit down to -60EF (-51EC)(LGAM odels Only)FactoryCorrosion Protection Phenolic epoxy coating, applied to condenser coils(with painted base section) and evaporator coils (with painted base andpainted blower housings), factory applied to either section or both sectionsFactoryooDisconnect Switch Accessible from outside of unit, spring loaded weath-erproof cover furnishedFactoryService Outlets (2) 115v ground fault circuit interrupter (GFCI) typeFactoryService valves - Fully serviceable brass valves installed in discharge & liquid linesFactorywwStainless Steel Heat Exchanger (LGA Models)FactoryFACTORYorFIELDINSTALLEDIte mLCA/LGA036 LCA/LGA042 LCA/LGA048 LCA/LGA060 LCA/LGA072 Blower Proving Switch-Monitors blower operation, shuts down unit if blower fails18L89 Condensate Drain Trap- field installed only,PVC37K69 CondensateDrainTrapfieldinstalledonly,ma y be factory enclosed to ship with unitCopper45K67 Control Systems See pages 5-9 for complete pages 5 - 9 Dirty Filter Switch- Senses static pressure increase indicating dirty filter condition30K48 Down-Flow Gravity Exhaust Dampers Allows relief of excess air, alumi-num blade dampers prevent blow back and outdoor air infiltration during offcycle, bird screen furnished, see below for damper hood - Net WeightLAGED03/07 - 8 lbs.

10 (4 kg)Down-Flow Gravity Exhaust Damper Hood- Field installed only - Net Weight28L51-15lbs.(7kg)Economizer Opposing gear driven recirculated air and outdoor air dampers,plug-in connections to unit, nylon bearings, neoprene seals, 24 volt fully modu-lating spring return motor, adjustable minimum damper position, damper assem-bly slides in unit, outdoor air hood must be ordered separately (see below),optional down-flow gravity exhaust dampers available (see above), choice ofeconomizer controls (see below) - Net WeightLAREMD03/07 - 34 lbs. (15 kg)Economizer Control Choice Sensible Control Furnished on IMC board in unit, uses outdoor air sen-sor furnished with unit to measure outdoor air temperature and control damp-er position(Furnished)Global Control Furnished on IMC board in unit, used with Direct DigitalControl (DDC)systems, uses global air sensor to control damper position,determines when to use outdoor air for cooling or set damper at minimumposition(Furnished)Outdoor Enthalpy Control Adjustable enthalpy sensor, senses outdoorair enthalpy for economizer control,0 to 100% outdoor airDifferential Enthalpy Control Two solid-state enthalpy sensors allowselection between outdoor air and return air (whichever has lowest enthalpy)(16K96)Outdoor(16K97)