Lennox International Inc Elite Series Gas Furnace General, Combustion, Dilution & Ventilation Air

Page 5

DThe input rate and temperature rise must be set per the furnace rating plate.

DOne hundred percent (100%) outdoor air must be pro­ vided for combustion air requirements during construc­ tion. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furnace. Size the temporary duct following these instructions in section for Combustion, Dilution and Ventilation Air in a confined space with air from outside.

DThe furnace heat exchanger, components, duct system, air filters and evaporator coils must be thoroughly cleaned following final construction clean-up.

DAll furnace operating conditions (including ignition, in­ put rate, temperature rise and venting) must be verified according to these installation instructions.

General

These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.

In addition to the requirements outlined previously, the fol­ lowing general recommendations must be considered when installing an EL296UHE furnace:

•Place the furnace as close to the center of the air dis­ tribution system as possible. The furnace should also be located close to the vent termination point.

•When the furnace is installed in non-direct vent applica­ tions, do not install the furnace where drafts might blow directly into it. This could cause improper combustion and unsafe operation.

•When the furnace is installed in non-direct vent applica­ tions, do not block the furnace combustion air opening with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation.

•When the furnace is installed in an attic or other insu­ lated space, keep insulation away from the furnace.

•When the furnace is installed in an unconditioned space, consider provisions required to prevent freezing of condensate drain system.

•The “A” coil drain pan is high quality engineering poly­ mer with a maximum service temperature of 500° F. However, adequate space must be provided between the drain pan and the furnace heat exchanger. At least 2” space is required for sectionalized heat exchanger and and 4” for drum-type or oil-fired furnace exchanger. Closer spacing may damage the drain pan and cause leaking.

CAUTION

EL296UHE unit should not be installed in areas nor­ mally subject to freezing temperatures.

WARNING

The State of California has determined that this prod­ uct may contain or produce a chemical or chemicals, in very low doses, which may cause serious illness or death. It may also cause cancer, birth defects or reproductive harm.

WARNING

Insufficient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause excess water in the heat exchanger resulting in rust­ ing and premature heat exchanger failure. Excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid exposure to the following substances in the com­ bustion air supply:

Permanent wave solutions Chlorinated waxes and cleaners Chlorine base swimming pool chemicals Water softening chemicals

De-icing salts or chemicals Carbon tetrachloride Halogen type refrigerants

Cleaning solvents (such as perchloroethylene) Printing inks, paint removers, varnishes, etc. Hydrochloric acid

Cements and glues

Antistatic fabric softeners for clothes dryers Masonry acid washing materials

Combustion, Dilution & Ventilation Air

If the EL296UHE is installed as a Non-Direct Vent Fur­ nace, follow the guidelines in this section.

NOTE - In Non-Direct Vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and flue gases are discharged out-doors.

In the past, there was no problem in bringing in sufficient outdoor air for combustion. Infiltration provided all the air that was needed. In today's homes, tight construction practices make it necessary to bring in air from outside for combustion. Take into account that exhaust fans, ap­ pliance vents, chimneys, and fireplaces force additional air that could be used for combustion out of the house. Unless outside air is brought into the house for combus­ tion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combustion gases enter the living space creating a po­ tentially dangerous situation.

In the absence of local codes concerning air for combus- tion and ventilation, use the guidelines and procedures in this section to install EL296UHE furnaces to ensure effi­ cient and safe operation. You must consider combustion air needs and requirements for exhaust vents and gas

Page 5

Page 4 Page 6
Image 5
Page 4 Page 6
Contents Table of Contents Installation Instructions EL296UHETOP View EL296UHE Unit Dimensions inches mmEL296UHE Gas Furnace Safety InformationShipping and Packing List Package 1 of 1 containsUse of Furnace as Construction Heater Installation LocationsInstalled in Combination with a Cooling Coil Combustion, Dilution & Ventilation Air GeneralAir from Inside Confined SpaceUnconfined Space Equipment in Confined Space ALL AIR from InsideEquipment in Confined Space Air from OutsideEquipment in Confined Space ALL AIR from Outside Shipping Bolt Removal Installation Setting EquipmentMoved before the furnace is placed into operation. Af­ EL296 Furnaces with 1/2 HP Blower MotorFront View Setting EquipmentSide View END ViewSide Return Air With transition and filter Return Air GuidelinesFrontBack Optional Return Air Base Upflow Applications OnlyRemoving the Bottom Panel Suspended Installation of Horizontal Unit Horizontal Application Installation ClearancesPlatform Installation of Horizontal Unit Horizontal Suspension KITDuct System Pipe & Fittings SpecificationsFilters Piping and Fittings Specifications Joint Cementing ProcedureSpecification Primer & Solvent CementPiping Suspension Guidelines Venting PracticesWall Thickness Guidelines Removal of the Furnace from Common VentVent Piping Guidelines Horizontal Installation Offset RequirementsExhaust Piping Figures 22, 24 Minimum Vent Pipe LengthsPiping Size Process Standard Concentric Outdoor Termination Usage135 Standard Termination Elevation 4500 10,000 ftConcentric Termination Elevation 4501 10,000 ft Maximum Allowable Intake or Exhaust Vent Length in FeetConcentric Termination at Elevation 0 4500 ft Standard Termination Elevation 4500 10,000 ft Applications Right Hand Discharge Shown Intake Piping General Guidelines for Vent Terminations 32 to 20 to Inside Corner Detail US Installations1 Canadian Installations2No minimum to outside corner EL296UHE Exiting Exhaust and Intake Vent Different pressure zonesDirect Vent Roof Termination KIT 51MM 76MM Alternate Terminations Tee & Forty-Five Degree Elbows OnlySupport 51MM 7MM Vent PipeTop View Side ViewFront View Exhaust NON-DIRECT Vent Roof Termination KIT EL296UHE Direct Vent Application Using Existing ChimneyCondensate Piping EL296UHE NON-DIRECT Vent Application Using Existing ChimneyCondensate Trap Locations Condensate Trap With Optional Overflow SwitchUnit shown in horizontal left-hand discharge position EL296UHE with Evaporator Coil Using a Common Drain178 Trap / Drain Assembly Using 1/2 PVC or 3/4 PVCPlugged TAP Gas PipingLeak Check Left Side Piping Standard Right Side Piping Alternate Horizontal Applications Possible Gas Piping ConfigurationsInterior MAKE-UP BOX Installation Precautions and ProceduresElectrical GAS Pipe Capacity FT3/HR kL/HROn-Board Links and Diagnostic Push Button Figure Typical EL296UHE Wiring Diagram LED Integrated ControlIntegrated Control DIP Switch Settings EL296 Field Wiring Applications With Conventional Thermostat With tstat with OFFHumidity control Heat / 1 CoolHeat Pump Single StageComfortSense 7000 L7724UOFF Unit Start-Up For Your Safety Read Before OperatingDial Gas Pressure AdjustmentGAS Meter Clocking Chart Proper Combustion High Altitude Information Carbon Monoxide Poisoning Hazard Heating Sequence of Operation Other Unit AdjustmentsCabinet Parts Repair Parts ListControl Panel Parts Blower PartsCleaning The Burner Assembly ServiceBlower FiltersTypical Start-Up & Performance Check ListTotal External Static Drain Line Temperature RiseCondensate Line Thermostat Vent PipeApproved Carbon Monoxide Detectors Requirements for Commonwealth of Massachusetts

EL296UHE, Elite Series Gas Furnace specifications

Lennox International Inc. has long been a trusted name in the heating, ventilation, and air conditioning (HVAC) industry, and their Elite Series Gas Furnace, the EL296UHE, stands out as a remarkable choice for homeowners seeking efficiency and reliability. This gas furnace is designed to deliver exceptional performance while ensuring the comfort of your living space.

One of the most significant features of the EL296UHE is its impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%. This means that a substantial portion of the energy consumed is converted into heat, translating to lower energy bills and a reduced environmental footprint. By minimizing energy waste, homeowners can enjoy both cost savings and greater environmental responsibility.

The EL296UHE is equipped with a two-stage heating process that allows it to operate at different speeds. This dual-stage functionality offers a more consistent temperature throughout the home, minimizing cold spots and enhancing overall comfort. Additionally, this furnace features a variable-speed blower motor, which not only improves the distribution of heated air but also quietly adjusts the airflow to match the heating requirements of your space.

In terms of technology, the EL296UHE incorporates advanced design elements such as a patented ZenBalance™ technology. This innovation further increases efficiency by adjusting the heating output based on real-time demands, ensuring optimal comfort without excessive energy consumption.

Durability is another hallmark of the EL296UHE. Constructed with high-quality materials, this furnace is built to withstand the rigors of daily use. Its stainless-steel heat exchanger is particularly noteworthy, as it enhances the furnace's ability to operate efficiently while maximizing longevity.

Homeowners are also reassured by the EL296UHE's quiet operation. The design minimizes operational noise, making it an ideal choice for those who prefer a peaceful home environment. Furthermore, the furnace is equipped with an ENERGY STAR® certification, a testament to its energy-efficient performance.

Lastly, Lennox offers comprehensive warranties for the EL296UHE, ensuring peace of mind for consumers. The combination of high efficiency, advanced technology, and durability makes the Lennox Elite Series Gas Furnace, EL296UHE, an excellent investment for homeowners looking to enhance their heating systems for optimal comfort and efficiency.
Top Page Image Contents