Lennox International Inc Elite Series Gas Furnace Upflow/Horizontal Air Discharge, EL280UH 1/2

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1-1/2 feet (.46 m) for each inch (25 mm) of common vent diameter.
10 − The vent pipe should be as short as possible with the least number of elbows and angles required to com- plete the job. Route the vent connector to the vent us- ing the shortest possible route.
11 − A vent connector shall be supported without any dips or sags and shall slope a minimum of 1/4 inch (6.4 mm) per linear foot (305 mm) of connector, back toward the appliance.
12 − Vent connectors shall be firmly attached to the furnace flue collar by self−drilling screws or other approved means, except vent connectors of listed type B vent material which shall be assembled according to the manufacturer’s instructions. Joints between sections of single wall connector piping shall be fastened by screws or other approved means.
13 − When the vent connector used for Category I ap- pliances must be located in or pass through a crawl- space, attic or other areas which may be cold, that por- tion of the vent connector shall be constructed of listed double-wall type B vent material or material having equivalent insulation qualities.
14 − All venting pipe passing through floors, walls, and ceil- ings must be installed with the listed clearance to com- bustible materials and be fire stopped according to lo- cal codes. In absence of local codes, refer to NFGC (Z223.1).
15 − No portion of the venting system can extend into, or pass through any circulation air duct or plenum.
INTERIOR TILE−LINED
MASONRY CHIMNEY
NOTE − the chimney must be properly sized per provided venting tables or lined with listed metal lining system.
PERMANENTLY SEALED FIREPLACE OPENING

Common Venting Using Tile−Lined Interior Masonry Chimney and Combined Vent Connector

MINIMUM LENGTH = AS SHORT AS PRACTICAL.

FOR MAXIMUM LENGTH SEE NOTE TO LEFT

NOTE− Refer to provided venting tables for installations.

OTHER

APPLIANCE

VENT

CONNECTOR

FURNACE

FIGURE 25

6 − The entire length of single wall metal vent connector shall be readily accessible for inspection, cleaning, and replacement.

7 − Single appliance venting configurations with zero lat- eral lengths (tables 3 and 4) are assumed to have no elbows in the vent system. For all other vent configura- tions, the vent system is assumed to have two 90° el- bows. For each additional 90° elbow or equivalent (for example two 45° elbows equal one 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10% (0.90 x maximum listed ca- pacity).

8 − The common venting tables (5, 6, 7, and 8) were gen- erated using a maximum horizontal vent connector length of 1−1/2 feet (.46 m) for each inch (25 mm) of connector diameter as follows:

TABLE 2

Connector Diameter

Maximum Horizontal

inches (mm)

Connector Length feet (m)

 

 

 

 

3 (76)

4−1/2 (1.37)

 

 

4 (102)

6 (1.83)

 

 

5 (127)

7−1/2 (2.29)

 

 

6 (152)

9 (2.74)

 

 

7 (178)

10−1/2 (3.20)

9 − If the common vertical vent is offset, the maximum common vent capacity listed in the common venting tables should be reduced by 20%, the equivalent of two 90° elbows (0.80 x maximum common vent capacity). The horizontal length of the offset shall not exceed

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Contents Table of Contents Installation Instructions EL280UHSupply AIR Opening Unit Dimensions − inches mmParts Arrangement Shipping and Packing List Safety InformationEL280UH Gas Furnace General Use of Furnace as Construction HeaterCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space Setting Equipment Return Air Bracket Duct System FiltersUpflow Position VentingHorizontal Right Position Horizontal Left PositionVent Connection Upflow and Horizontal Position Common Venting Using Metal−Lined Masonry Chimney −1/2 To these instructions and the provided venting tables. If Feet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard Leum gases Gas PipingHorizontal Applications Possible Gas Piping Configurations Electrostatic Discharge ESD Interior MAKE−UP BOX InstallationElectrical Page Field Wiring Applications OFF EL280UH Schematic Wiring Diagram TWO−STAGE Integrated Control Typical EL280UH Field Wiring DiagramIntegrated Control Unit Start−Up For Your Safety Read Before LightingHigh Altitude Gas Pressure AdjustmentProper Combustion Manifold Pressure Settings at all Altitudes Heat FAN-OFF Time in Seconds Other Unit AdjustmentsHeating Sequence of Operation Blower Data Pressure Bottom and One Side Electrical SHOCK, Fire Or Explosion Hazard ServiceHeat Exchanger Removal EL280UH BURNER, Combustion AIR Inducer AssemblyPage Repair Parts List Planned ServiceLED Integrated Control Diagnostic CodesFlash Code Status / Error Description On Next Troubleshooting Heating Sequence of OperationHeating Sequence of Operation U1.40 microamps Or Heat Demand is SATISFIED. a Five Cooling Sequence of Operation Troubleshooting Cooling Sequence of OperationContinuous LOW Speed FAN Sequence of Operation Troubleshooting Continuous Fan Sequence of OperationStart−Up & Performance Check List Temperature Rise Cooling ModeUnit Operation Drain Line
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Elite Series Gas Furnace Upflow/Horizontal Air Discharge, EL280UH specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, providing innovative solutions for both residential and commercial environments. One of their notable products is the EL280UH, a high-efficiency gas furnace designed to offer optimal comfort while minimizing energy consumption.

The EL280UH operates with an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This efficiency rating means that 80% of the fuel consumed is converted into heat, making it a cost-effective option for homeowners looking to reduce their utility bills. The furnace’s design is tailored to deliver reliable warmth during the coldest months, ensuring a comfortable home environment.

A key feature of the EL280UH is its two-stage heating capability. This technology allows the furnace to operate at a lower heating output for less demanding conditions, which not only conserves energy but also helps maintain a more consistent temperature in the home. When the demand for heat increases, the furnace can seamlessly transition to its higher output setting, providing quick and effective heating when needed.

Additionally, the EL280UH is equipped with a durable cabinet that minimizes heat loss, enhancing overall performance. The design incorporates several sound-dampening features as well, which contributes to quieter operation, allowing homeowners to enjoy a serene indoor environment.

The furnace also includes an advanced control system that integrates easily with smart home technology. This feature enables users to monitor and adjust their heating settings from anywhere using a smartphone app, creating added convenience and control over home heating.

Safety is another paramount aspect of the EL280UH. It includes an integrated flame sensor and pressure switch, ensuring reliable operation while minimizing risks associated with furnace malfunctions. The design adheres to stringent safety standards, providing users with peace of mind.

In summary, the Lennox EL280UH furnace stands out for its high efficiency, advanced features, and commitment to user safety. Its two-stage heating capability, quiet operation, and smart home integration make it an excellent choice for homeowners looking to enhance their heating system while being energy-conscious. The EL280UH embodies Lennox's dedication to quality and innovation, ensuring that comfort and efficiency go hand in hand.
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