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Maintenance Information - American Standard Noncondensing Gas Furnaces User's Information Manual

American standard noncondensing gas furnaces user's information guide.
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Maintenance information.

Never stop the cooling system by shutting off the
main power.
If the main power to your air conditioner is ever discon-
nected for more than three hours, turn off the thermostat.
Then wait for at least three more hours after the power has
been restored before turning the thermostat back on.
Failure to follow this procedure could result in damage to
your air conditioning system.
1. GENERAL INSPECTION - Examine the furnace instal-
lation for the following items:
a. All flue product carrying areas external to the fur-
nace (i.e. chimney, vent connector) are clear and free of
b. The vent connector is in place, slopes upward and is
physically sound without holes or excessive corrosion.
c. The return air duct connection(s) is physically sound,
is sealed to the furnace and terminates outside the
space containing the furnace.
d. The physical support of the furnace should be sound
without sagging, cracks, gaps, etc., around the base so
as to provide a seal between the support and the base.
e. There are no obvious signs of deterioration of the
Do not touch igniter. It is extremely hot. Failure to
follow this warning could result in severe burns.
2. BLOWERS - The blower size and speed determine the
air volume delivered by the furnace. The blower motor
bearings are factory lubricated and under normal operat-
ing conditions usually do not require servicing. Annual
cleaning of the blower wheel and housing is recommended
for maximum air output, and this must be performed only
by a qualified servicer or service agency.
3. IGNITER - This unit has a special hot surface direct
ignition device that automatically lights the burners. Please
note that it is very fragile and should be handled with care.
CAUTION: Do not touch igniter. It is extremely hot.
4. BURNER - Gas burners do not normally require sched-
uled servicing, however, accumulation of foreign material
may cause a yellowing flame or delayed ignition. Either
condition indicates that a service call is required. For best
operation, burners must be cleaned annually using brushes
and vacuum cleaner.
Turn off gas and electric power supply. To clean burners,
remove top burner bracket and lift burner from orifice.
NOTE: Be careful not to break igniter when remov-
ing burners. Clean burners with brush and/or vacuum
cleaner. Reassemble parts by reversal of the above proce-
Pub. No. 32-5034-02
NOTE: On LP (propane) units, some light yellow tipping of
the outer mantle is normal. Inner mantle should be bright
Natural gas units should not have any yellow tipped
flames. This condition indicates that a service call is
required. For best operation, burners must be cleaned
annually using brushes and vacuum cleaner.
NOTE: On LP (propane) units, due to variations in BTU
content and altitude, servicing may be required at shorter
5. HEAT EXCHANGER / FLUE PIPE - These items must
be inspected for signs of corrosion, and/or deterioration at
the beginning of each heating season by a qualified service
technician and cleaned annually for best operation.
6. CIRCUIT PROTECTION - If blower or gas valve fail to
operate, the cause could be the circuit breaker or a loose or
blown fuse. Replace fuse or reset circuit breaker.
7. OPERATION - Your warm air furnace should not be
operated in a corrosive atmosphere. Paint solvents, clean-
ing chemicals, spray propellants, and bleaches should not
be used in the vicinity of the furnace during normal
a cooling coil installed with your furnace, condensate
drains should be checked and cleaned periodically to as-
sure that condensate can drain freely from coil to drain. If
condensate cannot drain freely water damage could occur.
9. AIR CIRCULATION - To ensure increased comfort,
blower on this unit may be operated continuously for both
heating and cooling. This will result in constantly filtered
air and aid in maintaining more even temperatures by
avoiding temperature stratification throughout the condi-
tioned area. To accomplish constant air circulation, set
your thermostat fan switch to "ON".
Page 7


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