American Standard CUX1B040A9241A Installation, Operation And Maintenance Manual page 34

Owner's Information
NOTE:
The manufacturer of your furnace does not test any detec-
tors and makes no representations regarding any brand or
type of detector.
▲
WARNING
!
SAFETY HAZARD
BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRI-
CAL COMPONENTS, FAST MOVING FANS, AND COMBUSTIBLE
GAS. FOR PROTECTION FROM THESE INHERENT HAZARDS
DURING INSTALLATION AND SERVICING, THE ELECTRICAL
SUPPLY MUST BE TURNED OFF.
Installing and servicing heating equipment can be hazardous due
to gas and electrical components. Only trained and qualified
personnel should install, repair or service heating equipment.
To start the furnace.
Lighting instructions.
Your furnace does not use a continuously burning pilot flame.
Therefore, manually lighting your furnace is not required. Your
furnace is equipped with an automatic ignition system. It uses a
hot surface ignition device that automatically lights the burners
each time the thermostat signals the furnace to start.
▲
!
SAFETY WARNING
DO NOT attempt to manually light the furnace. Failure to follow
this warning could result in property damage, personal injury, or
death.
1. Please read all safety information in this book before operating
furnace.
2. Set thermostat to lowest setting. Turn off all electric power
to furnace.
3. Remove the furnace front panel to gain access to the main
gas valve.
4. Turn gas cock knob clockwise or the toggle switch located on
the main gas valve inside the unit to "OFF" position (see illustra-
tion on this page). If external gas cock is used, turn to "OFF"
position (see illustration on next page). Allow 5 minutes for any
gas within the unit to escape. LP gas being heavier than air may
require forced ventilation. If you smell gas STOP! Follow the
"What To Do If You Smell Gas" instructions on the front cover of
this book. If you don't smell gas, go to next step.
5. Turn gas cock knob counterclockwise or the toggle switch to
"ON" marker (see illustration on this page).
On/Off Switch
Page 34
WARNING
Your Gas Valve Shut-off May Be
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing filters. All other operations must
be performed by trained service personnel.
Parts and controls of this furnace are unique. Should service or
modification be required, be sure your servicer uses only factory
authorized parts, kits, or accessories for this furnace.
If you experience a problem with the operation of your furnace,
check the "Problem Solver" section of this manual before you call
for a possibly unneeded service call.
SAFETY HAZARD
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to the
installation instructions provided with the furnace and this
manual. For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
6. Replace the furnace front access panel.
7. Turn on main electrical supply and set thermostat to desired
setting. Combustion blower will start and ignition device will
start to heat up. After approximately 15 seconds main gas valve
will open and burners will ignite.
8. When thermostat is satisfied, main burners will extinguish.
9. If main burners fail to ignite, lower thermostat setting or
disconnect electrical supply, wait 5 minutes, raise thermostat
setting above indicated temperature.
10. If furnace will not light, turn "OFF" all gas and electricity to
unit and call servicer or gas supplier.
For complete shutdown.
Turn gas cock knob on main gas valve to "OFF" position. Discon-
nect electrical supply to unit.
If this is done during the cold weather months, provisions
must be taken to prevent freeze-up of all water pipes and
water receptacles.
Whenever your house is to be vacant, arrange to have someone
inspect your house for proper temperature. If your furnace should
fail to operate, damage could result, such as frozen water pipes.
Flame Roll-out Device.
All models are equipped with a fusible link located near the
burners. In case of flame roll-out, the link will open (melt) and
cause the circuit to open which shuts off all flow of gas.
ELECTRIC SWITCH
Inlet Pressure let Pressure
Boss (opt.) .) Boss
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WARNING
!
▲
CAUTION
!
Outlet Pressure Boss Outlet Pressure Boss
On/Off ff Swi Switch ch
Pub. No. 41-5016-12
Regul ulator tor
Adjust Adj ust