Safety Precautions; Planned Service - Lennox SL297NV User's Information Manual

Safety Precautions

If you discover any of the following, shut down your
unit, and contact a Lennox dealer for an inspection by
a licensed professional service technician (or equiva­
lent).
If you repeatedly hear any new or unfamiliar sounds
D
while your unit is operating, there may be a problem. For
example, poorly performing burners can produce unfa­
miliar noises.
D If you smell any unusual odors, your unit may be operat­
ing improperly. For example, units can give off unfamil­
iar odors if components are required to operate in ab­
normal conditions.
Look for visible signs of a malfunctioning unit. Examples
D
include unusual amounts of condensate on windows in­
side your house, visibly burnt components or unusual
dirt or rust accumulations on the vent pipe or in the unit.
If you experience headache, nausea, fatigue, or dizzi­
D
ness, the cause could be exposure to carbon monoxide
gas. This is often misdiagnosed as the flu because
symptoms are similar. If you suffer from flu-like symp­
toms that are exaggerated at home, but seem to sub­
side while you are away from the house, exposure to
carbon monoxide could be the cause.
WARNING
Do not use this furnace if any part has been under­
water. A flood-damaged furnace is extremely dan­
gerous. Attempts to use the furnace can result in
fire or explosion. Immediately call a licensed pro­
fessional service technician (or equivalent) to in­
spect the furnace and to replace all gas controls,
control system parts, and electrical parts that have
been wet or to replace the furnace, if deemed neces­
sary.
Your vigilance may pay off in early detection of a problem
before either personal injury or property damage occurs.
Do not hesitate to contact a qualified service technician as
an investment in your well being.

Planned Service

Annual Furnace Maintenance
At the beginning of each heating season, and to comply
with the Lennox Limited Warranty, your system should be
checked as follows by a licensed professional service tech­
nician (or equivalent).
1- Check wiring for loose connections, voltage at indoor
unit and amperage of indoor motor
2- Check the condition of the belt and shaft bearings if ap­
plicable.
3- Inspect all gas pipe and connections for leaks
4- Check the cleanliness of filters and change if necessary
5 Check the condition and cleanliness of burners and
6 Check the cleanliness of blower assembly and clean
7- Inspect the condensate drain and trap for leaks and
8- Evaluate the heat exchanger integrity by inspecting the
9- Ensure sufficient combustion air is available to the fur­
10 Inspect the furnace intake and exhaust pipes to make
NOTE - After any heavy snow, ice or frozen fog event the
furnace vent pipes may become restricted. Always check
the vent system and remove any snow or ice that may be
obstructing the plastic intake or exhaust pipes.
11 Inspect the furnace return air duct connection to ensure
12 Check the condition of the furnace cabinet insulation
13 Perform a complete combustion analysis during the fur­
.
14 Verify operation of CO detectors and replace batteries
.
Page 6
(monthly).
heat exchanger and clean if necessary.
the housing, blower wheel and blower motor if neces­
.
sary
cracks. The drain and trap must also be cleaned and the
trap must be primed with water. Inspect the rubber
hoses connected to the pressure switches for cracks or
loose connections, replace as necessary. Remove the
rubber hoses from the cold end header box and inspect
for any blockage, clean as needed. If strainers are in­
stalled in the hoses remember to remove and clean be­
fore re­installing the hoses.
heat exchanger per the AHRI heat exchanger inspec­
tion procedure. This procedure can be viewed at
www.ahrinet.org
nace. Fresh air grilles and louvers (in the room where
the furnace is installed) must be properly sized, open
and unobstructed to provide combustion air
sure they are in place, structurally sound, without holes,
blockage or leakage and the exhaust pipe is sloped to­
ward the furnace. Inspect terminations to ensure they
are free of obstructions and are structurally sound.
Inspect the furnace return air duct connection to ensure
the duct is sealed to the furnace. Check for air leaks on
supply and return ducts and seal where necessary
the duct is sealed to the furnace. Check for air leaks on
supply and return ducts and seal where necessary
and repair if necessary.
nace inspection to ensure proper combustion and oper­
ation. Consult Service Literature for proper combustion
values.
as required.
.
.
.