4
operations must be performed by trained service person-
nel. Observe safety precautions in this manual, on tags, and
on labels attached to the furnace, and other safety precautions
that may apply.
Recognize safety information. This is the safety-alert sym-
bol . When you see this symbol on the furnace and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety-alert sym-
bol. DANGER identifies the most serious hazards which
will
result in severe personal injury or death. WARNING
signifies hazards which
could
result in personal injury or
death. CAUTION is used to identify unsafe practices which
would
result in minor personal injury or product and prop-
erty damage. NOTE is used to highlight suggestions which
will
result in enhanced installation, reliability, or operation.
STARTING YOUR FURNACE
Instead of a continuously burning pilot flame, your furnace
uses an automatic hot surface ignition system to light the
burners each time the thermostat signals the furnace to start.
Follow these important safeguards:
• Never attempt to manually light the burners with a match
or other source of flame.
• Read and follow the operating instructions on the furnace,
especially the item that reads as follows:
Wait 5 minutes to clear out any gas. Then smell for gas,
including near the floor. If you smell gas,
STOP!
Follow “B’’
in the safety information above on this label. If you don’t
smell gas, go to the next step.
• If a suspected malfunction occurs with your gas control
system, such as the burners do not light when they should,
refer to the shutdown procedures on the furnace, or in the
next section, to turn off your system, then call your dealer as
soon as possible.
•
Check Air Filter:
Before attempting to start your furnace,
be sure the furnace filter is clean and in place. (See the main-
tenance section of this manual.) Then proceed as follows:
STEPS FOR STARTING YOUR
FURNACE
1. Set your room thermostat to the lowest temperature set-
ting. (See Fig. 7.)
2. Close the external manual gas valve. (See Fig. 8.)
7
89
3. Turn OFF electrical supply to the furnace. (See Fig. 9.)
4. Remove the furnace access door(s).
a. Downflow/Horizontal—Remove blower door after
removing 2 screws first, then remove the control
door. (See Fig. 10.)
b. Upflow—Remove control door. (See Fig. 11
.)
10 11
5. The gas valve will have EITHER a control knob or con-
trol switch to turn off and on. Turn the control knob or
switch on the gas valve to the OFF position and wait
5 minutes. (See Fig. 12 or 13.)
6. After waiting 5 minutes, turn the control knob or switch
on the gas valve to the ON position. (See Fig. 14 or 15.)
7. Replace the access door(s). See Fig. 16 for upflow and
Fig. 17 for downflow. Replace control door first on
downflow furnaces. Then replace blower door (secure
with 2 screws).
WARNING
Should overheating occur or the gas valves fail to
shut off the gas supply, turn off the manual gas
valve (See Fig. 8.) to the furnace BEFORE turning
off the electrical supply. A failure to follow this
warning could result in a fire or explosion, and
personal injury or death.
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