Nordyne Residential Gas Furnaces manual Maintenance, Burner, Manifold

5. Maintenance

Proper maintenance is most important to achieve the best performance from this furnace and should be performed by a qualified service technician. Follow the maintenance schedule (see Table 1) and the following instructions for years of safe, trouble free operation.

•Do not place combustible materials on or against the furnace cabinet.

•Do not store gasoline or any other flammable vapors and liquids in the vicinity of the furnace.

•Annually inspect the furnace, ductwork, and vent system for signs of physical deterioration.

•Change or replace the air filters monthly during any period when the circulating blower is operating regularly.

•Always replace the doors on the furnace after servicing or cleaning/changing the filters. Do not operate the furnace without all doors and covers in place, except to check burner operation.

•Avoid operating the furnace when windows and doors are open.

•Be sure that the thermostat is properly installed and is not being affected by drafts or heat from lamps or other appliances.

Air Filter(s) — Air filter(s) are not supplied with the furnace as shipped from the factory. The installer must provide a high velocity filter and rack in the return air duct adjacent to the furnace, or in a return air grille to the furnace. The filter(s) must be removed and cleaned monthly during the heating season to ensure proper furnace operation. New or newly renovated homes may require more frequent changing until the construction dust has been removed.

air blower motors used in these furnaces are pre-lubricated and sealed at the factory. No further oiling of the bearings is required for the life of the motor.

Blower Compartment — The blower compartment should be cleaned monthly during the heating and cooling seasons to remove any dirt and lint that may have accumulated in the compartment or on the blower and motor. Build- up of dirt and lint on the blower and motor can create excessive loads on the motor resulting in higher than normal operating temperatures and possible shortened service life.

Burner Maintenance — Check the burner flames at the start of every heating season. Set the thermostat to a temperature setting above the room temperature. Remove the top door from the furnace and visually inspect the burner through the view hole to make sure that the flame is drawn into the center of the heat exchanger tube (See Figure 5). In a properly adjusted burner assembly, the flame bends down and to the right at the end of the heat exchanger tube, and the end of the flame will be out of sight around the bend. The flame color should be blue, however some light yellow streaks may occur on the outer portions of the flame.

!CAUTION:

Some components in the burner vestibule are at high temperatures while the burners are operating. Use caution to avoid personal injury.

!WARNING:

Never operate the furnace without a filter in place. Dust and lint in the return air can build up on the internal components, resulting in a loss of efficiency, equipment damage, and possible fire.

Always replace the door(s) on the furnace after servicing or cleaning/changing the filters. Do not operate the furnace without the door(s) in place.

Lubrication — The bearings in the circulating

Burner Flame

Manifold

Figure 5. Burner Inspection

9