Maintenance Information - American Standard Condensing Gas Furnaces Fan Assisted Combustion System Upflow Horizontal and Downflow Horizontal User's Information Manual

Maintenance information.

Never stop the cooling system by shutting off the main
power.
If the main power to your air conditioner is ever disconnected 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 installation
for the following items:
a. All flue product carrying areas external to the furnace (i.e.
chimney, vent connector) are clear and free of obstruction.
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 furnace.
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 operating conditions usu-
ally 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 scheduled
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 removing burners.
Clean burners with brush and/or vacuum cleaner. Reassemble
parts by reversal of the above procedure.
NOTE: On LP (propane) units, some light yellow tipping of the
outer mantle is normal. Inner mantle should be bright blue.
Natural gas units should not have any yellow tipped flames. This
condition indicates that a service call is required. For best opera-
tion, burners must be cleaned annually using brushes and vacuum
cleaner.
Pub. No. 32-5022-10
NOTE: On LP (propane) units, due to variations in BTU content
and altitude, servicing may be required at shorter intervals.
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 techni-
cian 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, cleaning chemicals,
spray propellants, and bleaches should not be used in the vicinity
of the furnace during normal operation.
8. COOLING COIL CONDENSATE DRAIN - If you have a
cooling coil installed with your furnace, condensate drains should
be checked and cleaned periodically to assure 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 conditioned area. To accomplish
constant air circulation, set your thermostat fan switch to "ON".
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