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A05099
Fig. 10 -- Remove Furnace Door
A04150
Fig. 11 -- Control Switch to OFF
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ON
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A06338
Fig. 12 -- Control Switch to OFF
A04151
A04151
Fig. 13 -- Control Switch to ON
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A06339
Fig. 14 -- Control Switch to ON
7. Replace main furnace door. (See Fig. 15.)
8. Turn ON the electrical supply to the furnace and wait 1
minute. (See Fig. 16.)
9. Open the external manual gas valve. (See Fig. 17.)
10. Set the room thermostat to a temperature slightly above
the r oom 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 about 30 sec, the furnace
blower will start. Variable--capacity furnaces start at low
speed until the control makes the necessary adjustments to
operate the blower at either the low-- or high-- heat speed.
A05100
Fig. 15 -- Furnace Door Replaced
A92359
Fig. 16 -- Turn On Electrical Supply