Honeywell GAS Valve

Exposure to carbon monoxide gas can cause personal inju- ry and even death to all occupants, including pets. Any item that is powered by, or gives off heat from, a combustion pro- cess (including lawn mowers, automobiles, and fireplaces) has the potential to produce carbon monoxide gas. Because of this, Lennox recommends the use of a carbon monox- ide detector in your home, even if you do not own gas appliances. Reliable detectors are available at reasonable retail prices. Contact your Lennox dealer for more details about this investment in your safety.

Your furnace is designed to meet standards set by nation- al agencies, and to operate safely when properly installed and maintained. However, the unit’s performance can be greatly impacted by the individual installation and the op- erating environment. It is your responsibility to ensure that this appliance is maintained.

Proper maintenance is critical for your safety and the sat- isfactory operation of the product. Lennox strongly rec- ommends annual inspection and maintenance of this appliance. Contact your Lennox dealer for an inspection by a licensed professional service technician.

DANGER

Danger of explosion.

There are circumstances in which odorant used with LP/propane gas can lose its scent. In case of a leak, LP/propane gas will settle close to the floor and may be difficult to smell. An LP/propane leak detector should be installed in all LP applications.

Do not attempt to bleed the gas lines of air. Call your local gas provider.

Start−Up & Operation Information

WARNING

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

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 is equipped with a gas control switch. Use only your hand to turn the gas control switch. Never use tools. If the switch will not move by hand, do not try to repair it. Call a licensed professional service technician (or equivalent). Force or attempted re- pair may result in a fire or explosion.

Placing the SL280DFV furnace into operation: SL280DFV units are equipped with a SureLight® ignition system. Do not attempt to manually light burners on these furnaces. Each time the thermostat calls for heat, the burn- ers will automatically light. The ignitor does not get hot when there is no call for heat on units with the SureLight® ignition system.

Operating the Gas Valve (Figures 2 and 3)

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 upper access panel.

6 − Move switch on gas valve to OFF. Do not force. See figure 2 or 3.

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.

8 − Move switch on gas valve to ON. Do not force. See fig- ure 2 or 3.

9 − Replace the upper 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.

12 − If the appliance will not operate, follow the instructions urning Off Gas to the Unit" and call your service tech- nician or gas supplier.

WHITE RODGERS GAS VALVE

GAS VALVE SHOWN IN OFF POSITION

FIGURE 2

GAS VALVE SHOWN IN ON POSITION

FIGURE 3

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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.