6
11
12
13 14
8. Turn ON the electrical supply to the furnace and wait 1
minute. (See Fig. 13.)
9. Open the external manual gas valve. (See Fig. 14.)
10. Set the room thermostat to a temperature slightly
above the room temperature. This will automatically
signal the furnace to start.
11. When the furnace receives the start signal, the inducer is
started. When the pressure switch senses that there is suf-
ficient combustion air, the hot surface igniter is energized.
After the hot surface igniter is heated for 17 seconds, the
gas valve permits gas to flow to the main burners. After
ignition and a time delay of approximately 60 sec, the fur-
nace blower starts.
NOTE:
If the burners fail to ignite after 4 attempts, the fur-
nace control system will lock out. If lockout occurs, main
burners fail to light, or blower does not come on, shut down
the furnace and call your dealer for service.
12. Set your thermostat to the temperature that satisfies
your comfort 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 room temperature drops below the temperature
selected on the thermostat, the furnace will be switched
on automatically. When the room temperature reaches
the temperature selected on the thermostat, the furnace
will be switched off automatically.
Some thermostats have a FAN mode with 2 selections,
AUTO and ON. When set on AUTO, the furnace blower
cycles on and off. In ON mode, the furnace blower runs
continuously. Continuous fan keeps the temperature lev-
el in your home more evenly balanced. It also permits the
indoor air to be continuously filtered.
SHUTTING DOWN YOUR FURNACE
Should you need to shut down your furnace for service or
maintenance, you will need to turn the furnace off. The fol-
lowing procedures must be followed:
1. Set your room thermostat to the lowest temperature
setting. (See Fig. 15.)
2. Close the external manual gas valve (See Fig. 7.)
3. Turn off electrical supply to the furnace. (See Fig. 16.)
15
16
4. Remove main furnace door. (See Fig. 9.)
5. Turn the control switch on the gas control to the OFF
position. (See Fig. 17.)
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