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5
ON
OFF
OR
A02267
Fig. 9 -- Control Switch to ON
8. Replace the outer door.
1
2
3
A10301
Fig. 10 -- Furnace Door Replaced
9. Turn ON the electrical supply to the furnace.
A92359
Fig. 11 -- Turn On Electrical Supply
10. Open the external manual gas valve.
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P
E
N
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Fig. 12 -- Open Valve
11. Set the room thermostat to a temperature slightly above the
room temperature. This will automatically signal the furnace
tostart. Theinducermotorwillstartandthehotsurfaceigniter
willenergize. Whenhot,theigniterwillhaveanorangeglow.
12. Afterabout17seconds,thegasvalvepermitsgastoflowtothe
main burners where it is ignited. Hot flames begin to warm
the furnace’sheat exchanger. After atime delay ofapproxim-
ately 25--45 seconds the furnace blower is switched on.
NOTE: If the main burners fail to ignite, the furnace control
system will go through three more ignition cycles. Then if burners
fail to ignite, the system will lockout. If lockout occurs or the
blower does not come on, shut down your furnace and call your
dealer for service.
13. Set your thermostat to the temperature that satisfies your
comfort requirements. SUGGESTION: Setting the thermo-
stat back a few degrees—and compensating for the differ-
ence with warmer clothing—can make a big difference in
your fuel consumption on extremely cold days. The few de-
grees 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 be automatically switched off.
Continuous Fan Operation --Some thermostats have a “FAN”
switch with 2 selections: AUTO and ON. When thermostat is set
on AUTO, the furnace blower cycles on and off, controlled by the
thermostat. In ON position, the furnace blower runs continuously
except for a 42--62 sec delay at the “call for heat.” Continuous fan
keeps the temperature level in your home more evenly balanced. It
also continuously filters the indoor air.
Comfort Fant -- O n al l but
the 310AAV or 310JAV, the
continuous fan blower speed can be increased or decreased if
desired due to change of seasons, large gatherings in your home,
etc. Simply change your “FAN” switch from “on” to “off” (or
“auto” depending on your thermostat), and then return to “on”,
within 1 to 3 seconds. The blower will switch to the next highest
speed. There are at least 3 speeds to choose from. If the blower is
running on its highest speed, a request to change will direct the
blower to return to its lowest speed.
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. 3.)
2. Closethe external manual gas valve (See Fig. 4).
3. Turn off electrical supply to the furnace. (See Fig. 5.)
4. Remove outer furnace door. (See Fig. 6.)
5. Turn the switch on thegas control to the OFF position. (See
Fig. 7.)
6. Replace the outer furnace door. (See Fig. 9.)
7. Ifthefurnaceisbeingshutdownbecauseofamalfunction,call
your dealer as soon as possible.