Carrier 58PAV - Air For Combustion and Ventilation; Space Requirements for Air; Air Ducts and Connections

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• Check Air Filter: Before attempting to start your fur-
nace, be sure the furnace filter is clean and in place. (See
the maintenance section of this manual.) Then proceed as
follows:
Steps for starting your furnace
1. Set your room thermostat to the lowest temperature
setting. (See Fig. 7.)
2. Close the external manual gas valve. (See Fig. 8.)
7
8 9
3. Turn OFF the electrical supply to the furnace. (See Fig. 9.)
4. Remove the furnace access door(s).
a. Downflow/Horizontal—remove blower door after
removing 2 screws first, then remove the control
door. (See Fig. 10.)
b. Upflow—remove control door. (See Fig. 11.)
10 11
5. Turn the control knob on the gas valve to the OFF
position and wait 5 minutes. (See Fig. 12.)
6. After waiting 5 minutes, turn the control knob on the
gas valve to the ON position. (See Fig. 13.)
7. Replace the access door(s). See Fig. 14 for upflow and
Fig. 15 for downflow. Replace control door first on
downflow furnaces. Then replace blower door (secure
with 2 screws).
8. Turn ON the electrical supply to the furnace. (See Fig. 16.)
9. Open the external manual gas valve. (See Fig. 17.)
SYSTEM
COOL
OFF
HEAT
FAN
AUTO
ON
50
70
90
50
70
90
C
L
O
S
E
12 13
14 15
16 17
10. Set the room thermostat to a temperature slightly
above the room temperature. This will automatically
signal the furnace to start. The inducer motor will
start, and the hot surface ignitor will energize. When
hot, the ignitor will have an orange glow.
11. After 15 to 70 sec, 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 45 sec, the furnace
blower is switched on.
NOTE: If the main burners fail to ignite, the furnace con-
trol system will go through 3 more ignition cycles. 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.
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 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
F
F
O
ON
O
P
E
N