Lennox International Inc EL296UHE Use of Furnace as Construction Heater, Installation Locations

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In order to ensure proper unit operation in non-direct vent applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or CSA‐B149 standard.

Installation Locations

This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in figure 12. Accessibility and ser­ vice clearances must take precedence over fire protection clearances.

NOTE - For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring.

For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the floor. The furnace must be located or protected to avoid physical damage by vehicles. When a furnace is installed in a public garage, hangar, or other building that has a haz­ ardous atmosphere, the furnace must be installed accord­ ing to recommended good practice requirements and cur­ rent National Fuel Gas Code or CSA B149 standards.

NOTE - Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation and premature heat exchanger failure.

This EL296UHE furnace must be installed so that its electrical components are protected from water.

Installed in Combination with a Cooling Coil

When this furnace is used with cooling coils (figure 3), it shall be installed in parallel with, or on the upstream side of, cool­ ing coils to avoid condensation in the heating compartment. With a parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled air from entering the furnace. If the damper is manually oper­ ated, it must be equipped to prevent operation of either the heating or the cooling unit, unless it is in the full HEAT or COOL setting.

When installed, this furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National Electric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following ad­ dress:

National Fire Protection Association

1 Battery March Park

Quincy, MA 02269

In Canada, all electrical wiring and grounding for the unit must be installed according to the current regulations of the Canadian Electrical Code Part I (CSA Standard C22.1) and/or local codes.

Heating Unit Installed Parallel to Air Handler Unit

 

Dampers

 

 

(open during heating operation only)

 

Gas Unit

 

AIR FLOW

 

AIR FLOW

 

Air Handler Unit

 

 

Dampers

 

 

(open during cooling operation only)

Heating Unit Installed Upstream of Cooling Coil

AIR FLOW

Gas Unit

AIR FLOW

 

Cooling Coil

 

FIGURE 3

NOTE - This furnace is designed for a minimum continu­ ous return air temperature of 60°F (16°C) or an intermit­ tent operation down to 55°F (13°C) dry bulb for cases where a night setback thermostat is used. Return air tem­ perature must not exceed 85°F (29°C) dry bulb.

The EL296UHE furnace may be installed in alcoves, clos­ ets, attics, basements, garages, crawl spaces and utility rooms in the upflow or horizontal position.

This furnace design has not been CSA certified for installa­ tion in mobile homes, recreational vehicles, or outdoors.

Use of Furnace as Construction Heater

Lennox does not recommend the use of EL296UHE units as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and op­ eration of the unit with clogged or misplaced filters will dam­ age the unit.

EL296UHE units may be used for heating of buildings or structures under construction, if the following conditions are met:

D The vent system must be permanently installed per these installation instructions.

DA room thermostat must control the furnace. The use of fixed jumpers that will provide continuous heating is not allowed.

DThe return air duct must be provided and sealed to the furnace.

DReturn air temperature range between 60°F (16°C) and 80°F (27°C) must be maintained.

DAir filters must be installed in the system and must be maintained during construction.

DAir filters must be replaced upon construction comple­ tion.

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Contents Installation Instructions EL296UHE Table of ContentsEL296UHE Unit Dimensions inches mm TOP ViewSafety Information EL296UHE Gas FurnaceShipping and Packing List Package 1 of 1 containsInstalled in Combination with a Cooling Coil Installation LocationsUse of Furnace as Construction Heater General Combustion, Dilution & Ventilation AirConfined Space Air from InsideUnconfined Space Equipment in Confined Space ALL AIR from InsideEquipment in Confined Space ALL AIR from Outside Air from OutsideEquipment in Confined Space Installation Setting Equipment Shipping Bolt RemovalMoved before the furnace is placed into operation. Af­ EL296 Furnaces with 1/2 HP Blower MotorSetting Equipment Front ViewSide View END ViewReturn Air Guidelines Side Return Air With transition and filterRemoving the Bottom Panel Optional Return Air Base Upflow Applications OnlyFrontBack Horizontal Application Installation Clearances Suspended Installation of Horizontal UnitPlatform Installation of Horizontal Unit Horizontal Suspension KITFilters Pipe & Fittings SpecificationsDuct System Joint Cementing Procedure Piping and Fittings SpecificationsSpecification Primer & Solvent CementVenting Practices Piping Suspension GuidelinesWall Thickness Guidelines Removal of the Furnace from Common VentHorizontal Installation Offset Requirements Vent Piping GuidelinesExhaust Piping Figures 22, 24 Minimum Vent Pipe LengthsPiping Size Process Outdoor Termination Usage Standard ConcentricStandard Termination Elevation 4500 10,000 ft 135Concentric Termination at Elevation 0 4500 ft Maximum Allowable Intake or Exhaust Vent Length in FeetConcentric Termination Elevation 4501 10,000 ft Standard Termination Elevation 4500 10,000 ft Applications Right Hand Discharge Shown Intake Piping General Guidelines for Vent Terminations 32 to 20 to US Installations1 Canadian Installations2 Inside Corner DetailNo minimum to outside corner Direct Vent Roof Termination KIT Exiting Exhaust and Intake Vent Different pressure zonesEL296UHE Alternate Terminations Tee & Forty-Five Degree Elbows Only 51MM 76MM51MM 7MM Vent Pipe SupportFront View Side ViewTop View Exhaust EL296UHE Direct Vent Application Using Existing Chimney NON-DIRECT Vent Roof Termination KITEL296UHE NON-DIRECT Vent Application Using Existing Chimney Condensate PipingCondensate Trap With Optional Overflow Switch Condensate Trap LocationsEL296UHE with Evaporator Coil Using a Common Drain Unit shown in horizontal left-hand discharge positionTrap / Drain Assembly Using 1/2 PVC or 3/4 PVC 178Leak Check Gas PipingPlugged TAP Horizontal Applications Possible Gas Piping Configurations Left Side Piping Standard Right Side Piping AlternatePrecautions and Procedures Interior MAKE-UP BOX InstallationElectrical GAS Pipe Capacity FT3/HR kL/HROn-Board Links and Diagnostic Push Button Figure Typical EL296UHE Wiring Diagram Integrated Control LEDIntegrated Control DIP Switch Settings EL296 Field Wiring Applications With Conventional Thermostat OFF With tstat withHumidity control Heat / 1 CoolSingle Stage Heat PumpComfortSense 7000 L7724UOFF For Your Safety Read Before Operating Unit Start-UpGAS Meter Clocking Chart Gas Pressure AdjustmentDial Proper Combustion High Altitude Information Carbon Monoxide Poisoning Hazard Other Unit Adjustments Heating Sequence of OperationRepair Parts List Cabinet PartsControl Panel Parts Blower PartsService Cleaning The Burner AssemblyBlower FiltersStart-Up & Performance Check List TypicalTemperature Rise Total External Static Drain LineCondensate Line Thermostat Vent PipeRequirements for Commonwealth of Massachusetts Approved Carbon Monoxide Detectors

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.
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