7
Unitary Products Group
If Furnace Fails to Operate
Properly
1. Check settingof thermostat -- and
position of HEAT/COOL switch if
air conditioning is installed. If a
set--back type thermostat is em-
ployed be sure that the thermo-
stat is in the correct operating
mode.
2. Check to see that electrical
power is ON.
3. Check to see that the lever on the
gas control valve is in the full ON
position.
4. Make sure filters are clean, return
grilles are not obstructed, and
supply registers are open.
5. Be sure that furnace flue piping is
open and unobstructed.
If the cause for the failure to oper
Ć
ate is not obvious, do not attempt
to service the furnace yourself.
Call a qualified service agency or
your gas supplier.
PERIODIC INSPECTION
AND MAINTENANCE BY
HOMEOWNER
It is recommended that the home-
owner or user make an inspection of
the furnace at least every 90 days, or
more often if desired. It is also recom-
mended that a qualified service
agency inspect the furnace before
each operating season the furnace is
used, both heating and air condition-
ing, and at any time that there is an in-
dication of malfunction. The owner/
user should not attempt to disassem-
ble the furnace unless experienced
and qualified to do so.
FOR SAFETY -- Turn off electri
Ć
cal power to furnace before per
Ć
formingservice such as cleaning
filters.
Filters
It is very important that filters in your
furnace or air conditioning system be
replaced frequently. Clean filters not
only provide added comfort and a
more healthful environment, but also
allow the system to operate more effi-
ciently. Check filters every two or
three weeks.
Motor Lubrication
The circulating air blower motor and
vent blower are permanently lubri-
cated and do not require periodic lu-
brication.
Return Air
On some closet installations, the re-
turn air openingto the furnace may be
on the floor, and/or on the door and/or
on the side wall of the closet. The up-
per grille on the front of the furnace
admits return air to the blower. Return
air must be provided back to the circu-
lating blower in order to provide air
distribution.
Do not obstruct these openings
including the grille on the fur
Ć
nace. To do so will cause the fur
Ć
nace to activate the high limit
and shut down or it may cause
asphyxiation.
While you are away
Your furnace is equipped with a safety
device which will shut off the supply of
gas to the burner in case of malfunc-
tion. For this reason it is never practi-
cal to assume that the furnace will op-
erate unattended for a long period of
time, especially if there is a possibility
of damage to your property because
of freezing. So, if you plan to be away
from home, arrange for someone to
check your house every day.
SEASONAL SERVICE
INFORMATION
Duringextreme cold weather, ice may
form on the furnace roof jack crown.
Small amounts of ice forming on the
roof jack will present no problem to
proper furnace operation. However,
excessive ice formation could restrict
the combustion air supply to the burn-
er causing inefficient burner opera-
tion.
When the temperature is very cold,
near zero or below, it is recom-
mended that the roof jack be in-
spected every day or more frequently
if required. If ice has started to collect
on the roof jack crown, it should be
carefully broken off.
Your Serviceman
Your furnace’s best friend is your qu-
alified serviceman. If the unit gives
any indication of improper operation,
call your serviceman. If the service-
man is allowed to perform the normal
routine care of your furnace, he can
many times detect potential difficul-
ties and make corrections before
trouble develops. Preventative main-
tenance of this type will allow you to
operate the unit with a minimum of
concern, and at the same time will pay
for itself in added years of comfort.
When You Call For Service
Assistance
Very often time can be saved if you
will give the service agency the
MODEL and SERIAL NUMBER of
your furnace. This will enable him to
determine the specific components
used, and perhaps to better identify
the possible problem and be better
prepared if a service call is required.
To Contact Your Serviceman
(fill in)
COMPANY:___________________
ADDRESS:____________________
TELEPHONE:_________________
All appliances need maintenance by
serviceman at the beginning of each
heating season. Call your nearest au-
thorized service technician to:
1. Replace filters. Clean all lint and
dust from around furnace.
2. Remove fan and clean all dust
and lint from unit with stiff bristle
brush.
3. Inspect combustion chamber, the
transition into the blower com-
partment, flue collar, and roof
jack.
4. Check the gas valve and line con-
nections for leaks.
5. Make any adjustments neces-
sary for good operation.
NOTE: The coil panel provides a
good removable access for
inspecting inside the furnace
casing. Smoke or reflected
light
inside
the
casing
indicates the presence of
leaks in the heat exchanger.
