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Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B’’ in the above safety information on this label. If you don’t smell gas, go to the next step.” WARNING ! Should overheating occur or the gas valves fail to shut off the gas supply, turn off the manual gas valve to the furnace BEFORE turning off the electrical supply. (See Fig. 8.) A failure to follow this warning could result in a fire or explosion, and personal injury or death. • 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 see “Shutting Down your Furnace” section in this manual, 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 maintenance section of this manual.) Then proceed as follows: ® 7 STEPS FOR STARTING YOUR FURNACE 1. Set your room thermostat to the lowest temperature setting. (See Fig. 7.) 2. Close the external manual gas valve. (See Fig. 8.) 3. Turn off electrical supply to the furnace. (See Fig. 9.) CLOSE 8 9 4 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.) 5. The gas valve will have EITHER a control knob or control 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. Replace blower door and secure with 2 screws. 8. Turn on electrical supply to the furnace. (See Fig. 18.) 9. Open the external manual gas valve. (See Fig. 19.) 10. Set the room thermostat to a temperature slightly above the room temperature. This will automatically signal the furnace to start. The inducer motor will start, and the hot surface ignitor will energize. When hot, the ignitor will have an orange glow. 11. After 15 to 70 sec, the gas valve permits gas to flow to the main burners where it is ignited. Hot flames begin to warm the furnace’s heat exchanger. After a time delay of approximately 45 sec, the furnace blower is switched on. FFO 12 O F F 2 3 1 M P ON O F F C OR 13 ON 14 OR 15 O F F 2 3 1 M P ON O F F C OPEN NOTE: If the main burners fail to ignite, the furnace control system will go through 3 more ignition cycles. If burners still fail to ignite, the system will lockout. (Under some circumstances the furnace may reset from lockout and attempt to ignite if a call for heat still exists.) If lockout occurs or the blower does not come on, refer ON OFF ON OFF 5 to the shutdown procedures on the furnace or see “Shutting Down Your Furnace” section in this manual, and call your dealer for service. 12. Set your thermostat to the tem-perature that satisfies your com-fort requirements. SUGGESTION: Setting the thermostat back a few degrees and compensating for the difference with warmer clothing can make a big difference in your fuel consumption. The few degrees at the top of your thermostat “comfort level’’ are the most costly degrees to obtain. When the room temperature drops below the temperature selected on the thermostat, the furnace will switch on automatically. When the room temperature reaches the setting selected on the thermostat, the furnace will automatically switch off. Some thermostats have a “FAN’’ switch with 2 selections, AUTO and ON. When thermostat is set to AUTO, the furnace blower cycles on and off, controlled by the thermostat. In ON position, the furnace blower runs continuously except for a 77-sec delay at the “call for heat.’’ This keeps the temperature level in your home more evenly balanced. It also continuously filters the indoor air. When FAN switch is moved from ON toAUTO, the furnace blower will continue running for 90 sec before stopping. SHUTTING DOWN YOUR FURNACE Should you ever suspect a malfunction in your furnace, you will need to turn the furnace off. The following procedures must be followed: 1. Set your room thermostat to the lowest temperature setting. (See Fig. 20.) 2. Close the manual gas valve that is located outside of the furnace cabinet. (See Fig. 8.) 3. Turn off electrical power to your furnace. (See Fig. 21.) 4. Remove the control access door on your furnace. (See Fig. 10 or 11.) On upflow furnaces, removing the blower access door is not required. 5. Turn the control knob or electric switch on the gas valve to the OFF position. (See Fig. 22 or 23.) 6. Replace the control access door. (See Fig. 16 or 17.) 7. If the furnace is being shut down because of a malfunction, call your dealer as soon as possible. ® 20 21 FFO 22 OR 23 O F F 2 3 1 M P ON O F F C PERFORMING ROUTINE MAINTENANCE With proper ...
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