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American Standard Noncondensing Gas Furnaces User's Information Manual Page 21

American standard noncondensing gas furnaces user's information guide.
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To light furnace.
Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.
Never test for gas leaks with an open flame. Use a com-
mercially available soap solution made specifically for the
detection of leaks to check all connections. A fire or
explosion may result causing property damage, personal
injury, or loss of life.
Lighting instructions.
Your furnace is equipped with a hot surface direct ignition
Do not attempt to manually light the furnace.
1. Please read all safety information in this book before operating
2. Set thermostat to lowest setting. Turn off all electric power to
3. Remove control access panel.
4. Turn gas cock knob on main gas valve with unit clockwise to
"OFF" position. If external gas cock is used, turn to "OFF"
position. 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.
Your furnace may have a "Knob Switch" or a "Toggle Switch" to turn the gas ON or OFF.
Pub. No. 32-5034-02
5. Turn gas cock knob counterclockwise to "ON" marker.
6. Replace control 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.
CAUTION: 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
Safety cutoff device (thermal limit).
All models are equipped with a fusible link behind gas valve.
In case of main gas valve malfunction and consequent
overheating, link will open and close off flow of all gas. See
instruction label on front panel of heat exchanger.
Page 9


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