American Standard CUX1B040A9241A Installation, Operation And Maintenance Manual page 39

Regular dealer maintenance.
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 installa-
tion 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.
f. The burner flames are in good adjustment without erratic
flames. See illustation to the right of the burner.
g. Fresh air inlet and vent are not blocked and free from
obstruction. The horizontal or vertical vent and inlet must
be located at least 12 inches minimum (18 inches in
Canada) above the normally expected snow accumulation
level.
Contact your service agent if you feel you are uncomfortable
performing any of the inspections noted in section 1.
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 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.
▲
WARNING
!
SAFETY WARNING
Unit is equipped with a blower door switch which cuts power to
blower and gas valve causing shutdown when door is removed.
Unit must not be altered to allow operation with the blower door
removed. Operation with doors removed or ajar can permit the
escape of dangerous fumes. All panels must be securely
closed at all times for safe operation of the furnace. Failure to
follow the warning could cause property damage, personal
injury, or death.
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.
▲
!
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.
Pub. No. 41-5016-12
CAUTION
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
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 intervals.
5. HEAT EXCHANGER/FLUE PIPE — These items must be
inspected for signs of corrosion, and/or deterioration at the begin-
ning 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 oper-
ated in a corrosive atmosphere. Paint solvents, cleaning chemi-
cals, 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, the
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".
▲
WARNING
!
EXPLOSION HAZARD
SHOULD OVERHEATING OCCUR, OR THE GAS SUPPLY FAIL
TO SHUT OFF, SHUT OFF THE MANUAL GAS VALVE TO THE
FURNACE BEFORE SHUTTING OFF THE ELECTRICAL
SUPPLY.
FAILURE TO FOLLOW THIS WARNING COULD RESULT IN
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Owner's Information
FLAME
Page 39