Carrier 58EJA - Manual (Page 7)

WARNING
If overheating occurs, or the gas valve fails to shut off the
gas supply, turn OFF the manual gas valve (see Fig. 7) to
the furnace BEFORE turning OFF the electrical supply.
Failure to follow this warning could result in a fire or explo­
sion, and personal injury or death.
• CHECK AIR FILTER: Before attempting to start your furnace,
be sure the furnace filter is clean and in place. (See the mainte­
nance section of this manual.) Then proceed as follows:
STEPS FOR STARTING YOUR FURNACE
1. Set your room thermostat to the lowest temperature set­
ting. (See Fig. 6.)
2. Close the external manual gas valve. (See Fig. 7.)
3. Turn OFF the electrical supply to the furnace. (See Fig. 8.)
and wait 5 minutes. (See Fig. 9.)
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5. After waiting 5 minutes, turn the control knob on the gas
valve to the ON po.sition. (See Fig. 9.)
6. TUrn ON the electrical supply to the furnace. (See Fig. 10.)
7. Open the external manual gas valve. (See Fig. 11.)
8. Set the room thermostat to a temperature slightly above
room temperature. This will automatically signal the fur­
nace to start. The inducer motor will start, and the hot sur­
face ignitor will energize. When hot, the ignitor will have
an orange glow.
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9. After 30 to 58 seconds, 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 60 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 cycle.s. Then, if
burners fail to ignite, the system will lockout. If lockout occurs,
or the blower doesn’t come on, shut down your furnace and call
your dealer for service.
10. Set your thermostat to the temperature that satisfies your
comfort requirements. SUGGESTION; Setting the ther­
mostat back a few degi'ees—and compensating for the dif­
ference with warmer clothing—can make a big difference
in your fuel consumption on extremely cold days. 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 be switched on
automatically. When the room temperature reaches the
degree selected on the thermostat, the furnace will be au­
tomatically switched off.