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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 fl ue gas
temperature increases above 160°F. This switch
protects the plastic fl ue system and the inducer
from over-temperature conditions.
Flame Roll-Out Switch – This switch provides
fl ame roll-out protection to the furnace and
combustion air inlet pipe.
MAINTENANCE
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 fi lter in place. Dust and lint in the
return air can build up on internal
components, resulting in loss of
effi ciency, equipment damage, and
possible fi re.
AIR FILTER(S) ARE NOT SUPPLIED WITH THE
FURNACE AS SHIPPED FROM THE FACTORY.
FILTERS FOR SIDE RETURN AND BOTTOM
RETURN APPLICATIONS ARE AVAILABLE
FROM YOUR LOCAL DISTRIBUTORS.
The installer should provide a fi lter rack for a high
velocity type fi lter 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