Advertisement
Fig. 9 - Turn
Off Electrical
Supply
A92185
Fig. 13 - Furnace
Door
Replaced
A05088
Fig. 10 - Remove
Furnace
Door
Fig. 11 - Control
Switch
to OFF
Fig. 12 - Control
Switch
to ON
A05087
A04150
A04151
Fig. 14 - Turn
On Electrical
Supply
A92359
Fig. 15 - Open Valve
A06189
7. Replace
main furnace
door. (See Fig. 13.)
8. Turn
ON the electrical
supply
to the furnace
and wait 1
minute.
(See Fig. 14.)
9. Open the external
manual
gas valve. (See Fig. 15.)
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 about 30 sec, the furnace blower
will start.
Variable-capacity
furnaces
start at medium
speed until the
control
makes
the
necessary
adjustments
to operate
the
blower
at either the low-,
medium-,
or high-heat
speed.
NOTE:
If the burners
fail to ignite after 4 attempts,
the furnace
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.
Advertisement
