Lennox International Inc EL280UH Troubleshooting Cooling Sequence of Operation

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Troubleshooting: Cooling Sequence of Operation

COOLING SEQUENCE OF OPERATION

POWER ON

 

 

 

YES

SIGNAL POLARITY REVERSED.

 

CONTROL WILL CONTINUE TO CALL FOR COOLING

IS POLARITY REVERSED?

 

 

IN THIS CONDITION.

 

 

 

 

STATUS ERROR CODE 5 + 4.

NO

 

 

 

NO

SIGNAL IMPROPER GROUND AT LED.

IS THERE

CONTROL WILL CONTINUE TO CALL FOR COOLING

 

PROPER GROUND?

 

IN THIS CONDITION.

 

 

STATUS ERROR CODE 5 + 3.

YES

 

 

THERMOSTAT CALLS FOR FIRST−STAGE COOL.

 

COMPRESSOR AND CONDENSER FAN

 

 

ENERGIZED.

 

 

INDOOR BLOWER ENERGIZED ON FIRST STAGE

 

COOL SPEED AFTER 2 SECOND DELAY.

 

 

 

YES

COMPRESSOR AND CONDENSER FAN DE−ENERGIZED.

FIRST−STAGE DEMAND FOR COOL SATISFIED?

INDOOR BLOWER DE−ENEGIZED.

 

 

NO

 

 

THERMOSTAT CALLS FOR SECOND−STAGE COOL.

 

INDOOR BLOWER RAMPS UP TO SECOND−STAGE COOL SPEED.

 

SECOND−STAGE DEMAND FOR COOL SATISFIED?

 

YES

 

 

UNIT RETURNS TO FIRST STAGE COOL

 

 

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Contents Installation Instructions EL280UH Table of ContentsUnit Dimensions − inches mm Supply AIR OpeningParts Arrangement Safety Information EL280UH Gas FurnaceShipping and Packing List Use of Furnace as Construction Heater GeneralCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space Setting Equipment Return Air Bracket Filters Duct SystemVenting Upflow PositionHorizontal Left Position Horizontal Right 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 Gas Piping Leum gasesHorizontal Applications Possible Gas Piping Configurations Interior MAKE−UP BOX Installation ElectricalElectrostatic Discharge ESD Page Field Wiring Applications OFF EL280UH Schematic Wiring Diagram Typical EL280UH Field Wiring Diagram TWO−STAGE Integrated ControlIntegrated Control For Your Safety Read Before Lighting Unit Start−UpGas Pressure Adjustment Proper CombustionHigh Altitude Manifold Pressure Settings at all Altitudes Other Unit Adjustments Heat FAN-OFF Time in SecondsHeating Sequence of Operation Blower Data Pressure Bottom and One Side Service Electrical SHOCK, Fire Or Explosion HazardEL280UH BURNER, Combustion AIR Inducer Assembly Heat Exchanger RemovalPage Planned Service Repair Parts ListIntegrated Control Diagnostic Codes Flash Code Status / Error DescriptionLED Troubleshooting Heating Sequence of Operation On NextHeating Sequence of Operation U1.40 microamps Or Heat Demand is SATISFIED. a Five Troubleshooting Cooling Sequence of Operation Cooling Sequence of OperationTroubleshooting Continuous Fan Sequence of Operation Continuous LOW Speed FAN Sequence of OperationStart−Up & Performance Check List Cooling Mode Temperature RiseUnit 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.