Lennox International Inc DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV Unit Start−Up

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Unit Start−Up

FOR YOUR SAFETY READ BEFORE LIGHTING

WARNING

Do not use this furnace if any part has been underwa- ter. Immediately call a licensed professional service technician (or equivalent) to inspect the furnace and to replace any part of the control system and any gas control which has been under water.

WARNING

If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.

CAUTION

Before attempting to perform any service or mainte- nance, turn the electrical power to unit OFF at dis- connect switch.

WARNING

During blower operation, the ECM motor emits ener- gy that may interfere with pacemaker operation. In- terference is reduced by both the sheet metal cabinet and distance.

BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

The gas valve on the SL280DFV unit will be equipped with either a gas control switch. Use only your hand to move the control switch. Never use tools. If the switch will not turn or if the switch will not move by hand, do not try to repair it. Force or attempted repair may result in a fire or explosion.

Placing the furnace into operation:

SL280DFV units are equipped with an automatic ignition system. Do not attempt to manually light burners on these furnaces. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does not get hot when there is no call for heat on units with an automatic ignition system.

WARNING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or death.

Gas Valve Operation (Figures 26 and 27)

1 − STOP! Read the safety information at the beginning of this section.

2 − Set the thermostat to the lowest setting.

3 − Turn off all electrical power to the unit.

4 − This furnace is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.

5 − Remove the access panel.

6 − Move switch on gas valve to OFF. Do not force. See figure 26 or 27.

7 − Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instruc- tions. If you do not smell gas go to next step.

WHITE RODGERS GAS VALVE

 

MANIFOLD

HIGH FIRE ADJUSTMENT

INLET PRESSURE POST

SCREW

 

PRESSURE TAP

(under cap)

GAS VALVE SHOWN IN ON POSITION

FIGURE 26

 

HONEYWELL GAS VALVE

 

INLET PRESSURE TAP

HIGH FIRE

 

ADJUSTING SCREW

 

ON SIDE

 

 

 

(under cap)

 

 

 

 

 

 

 

MANIFOLD

 

 

 

PRESSURE

 

 

 

TAP ON

GAS VALVE SHOWN IN ON POSITION

SIDE

FIGURE 27

8 − Move switch on gas valve to ON. Do not force. See fig- ure 26 or 27.

9 − Replace the access panel.

10 − Turn on all electrical power to to the unit.

11 − Set the thermostat to desired setting.

NOTE − When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

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Contents Table of Contents Installation Instructions SL280DFVTOP View Unit Dimensions − inches mmParts Arrangement Safety Information SL280DFV Gas FurnaceShipping and Packing List General Use of Furnace as Construction HeaterCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space ALL AIR from Outside Equipment in Confined SpaceEquipment Confined Space ALL AIR from Outside NON−COMBUSTIBLE Floor Opening Size Downflow InstallationProperly Plenum Sized Floor Opening Setting EquipmentSL280DFV Unit Cooling CoilFilters Venting Duct SystemTables for installations −1/2 MIN MAX 126 FAN + FAN FAN + NAT 168 Carbon Monoxide Poisoning Hazard Gas PipingGas Pipe Capacity − ft3/hr m3/hr MAKE−UP BOX ElectricalNon−Communicating Icomfortt Integrated Control Outdoor Unit Icomfort Touch 24V Humidifier Connections System Wiring120V Connections ApplicationsSL280 Field Wiring Applications With Conventional Thermostat OFF Single Stage Thermostat w Dual fuel capa Bilities SL280DFV Schematic Wiring Diagram Typical SL280DFV Field Wiring Diagram + = Data High Connection − = Data LOW Connection Integrated Control−10% approx OFF On−Board Links Blower Data 1400 Operating System Demand System Response Sequence VAC Room Thermostat Calls for First Stage Cooling GAS Valve Shown in on Position Unit Start−UpProper Combustion Gas Pressure AdjustmentHigh Altitude Manifold Pressure SettingsHeating Sequence of Operation Other Unit AdjustmentsSEC Heating Operation with TWO−STAGE ThermostatElectrical SHOCK, Fire Or Explosion Hazard ServiceSL280DFV BURNER, Combustion AIR Inducer Assembly Page Repair Parts List Planned ServiceIntegrated Control Diagnostic Codes Integrated Control Diagnostic ModesEquipment is unable to communicate. Indicates Reconfigure the system. Replace control if heating Low pressure switch failed open To flame failure Limiters to protect the motor from damage caused Sor run cycle, or after power reset Volt power−up of the furnace control, Program Unit Capacity/Size ModeCall for FIRST−STAGE Heat Troubleshooting Heating Sequence of OperationCall for Heat Satisfied Call for SECOND−STAGE Heat2ND Stage Heat Call for Heat Satisfied FIRST−STAGE Heat SECOND−STAGE HeatCall for Cooling Troubleshooting Cooling Sequence of OperationCall for FAN Troubleshooting Continuous Fan Sequence of Operation
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DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV specifications

Lennox International Inc has made a significant mark in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. One of its standout products is the SL280DFV model, a high-efficiency gas furnace designed to meet the needs of modern homes.

The SL280DFV boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners. The high efficiency not only reduces energy bills but also lessens the environmental impact by minimizing greenhouse gas emissions.

One of the key features of the SL280DFV is its two-stage gas valve operation. This technology allows the furnace to operate at two levels of heating output: low stage for milder days and high stage for extremely cold temperatures. This adaptability enhances comfort by maintaining more consistent indoor temperatures while also saving energy when full power is unnecessary.

Another innovative aspect of the SL280DFV is its variable-speed blower motor. This smart technology enables the furnace to adjust airflow based on the heating needs of a home, which promotes quiet operation and improved temperature consistency throughout living spaces.

The SL280DFV is equipped with a durable heat exchanger that is designed to withstand the rigors of daily use, contributing to the unit’s longevity. Additionally, the furnace features a smart ignition system that ensures reliable start-ups, so homeowners can depend on it through the coldest winter nights.

Safety is also a priority in the design of the SL280DFV. It includes various safety features such as a built-in flame sensor and advanced venting system, designed to avert hazardous situations and ensure optimal operation.

Furthermore, Lennox offers convenient installation and maintenance support, making the SL280DFV not only an efficient heating solution but also a practical choice for homeowners. With its blend of advanced technology, high efficiency, and reliability, the Lennox SL280DFV is an appealing option for those looking to upgrade their home’s heating system, promising comfort and peace of mind for many winters to come.
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