Maintenance

through the heat exchanger. It also senses a blocked condensate drain condition.

Vent Pressure Switch – The vent pressure switch reacts to blockage in the vent or combus- tion air piping.

Supply Air Limit Switch – The supply air limit switch prevents the air temperature leaving the furnace from exceeding the maximum outlet air temperature.

Vent Safety Switch – The vent safety switch shuts the furnace down if the outlet ﬂue gas temperature increases above 160°F.This switch protects the plastic ﬂue system and the inducer from over-temperature conditions.

Flame Roll-Out Switch – This switch provides ﬂame roll-out protection to the furnace and combustion air inlet pipe.

It is recommended that the furnace be checked yearly. At a minimum, this check should include the following items.

!WARNING:

To avoid electric shock,personal injury, or death,disconnect the electric power before performing any maintenance.

!WARNING:

Holes in the vent pipe or heat exchang- er can cause products of combustion to enter the home. Replace the vent pipe or heat exchanger if leaks are found. Failure to prevent products of combustion from being circulated into the living space can create potentially hazardous conditions including car- bon monoxide poisoning that could result in personal injury or death.

Combustion Air and Vent System

Check the combustion air and vent pipe to ensure that it is not damaged, corroded or blocked by debris.Any damaged section of vent pipe must be replaced, and any obstruction or blockage must be removed prior to operating the furnace.

Air Filter(s)

!WARNING:

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

AIR FILTER(S) ARE NOT SUPPLIEDWITHTHE FURNACE AS SHIPPED FROMTHE FACTORY. FILTERS FOR SIDE RETURN AND BOTTOM RETURN APPLICATIONS ARE AVAILABLE FROM YOUR LOCAL DISTRIBUTORS.

The installer should provide a ﬁlter rack for a high velocity type ﬁlter in the return air duct adjacent to the furnace. Filters should be changed or cleaned monthly during the heating season. New or newly renovated homes may require more frequent changing until the construction dust has been removed.

Lubrication

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

Condensate Drain Assembly

Be sure the condensate lines are free and open (i.e. avoid kinking hoses). Also make sure all hose clamps are tight to avoid drawing air into the system.

Blower Compartment

The blower compartment should be cleaned monthly during the heating and cooling seasons