Bryant CONDENSING GAS FURNACE 352MAV - Manual (Page 5)

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a
8
9
10
2. Close the external manual gas
valve. (See Fig. 9.)
3. Turn off electrical supply to the
furnace. (See Fig. 10.)
4. Remove the main furnace door.
(See Fig. 11.)
5. Gas valve will have EITHER a con-
trol switch or control knob to turn
OFF or ON. Turn control switch or
knob on the gas valve to the OFF
position and wait 5 minutes. (See
Fig. 12 or 13.) Then smell for gas,
including near the floor. If you
smell gas,
STOP! Follow “B” on
furnace label. If you don’t smell
gas, go to next step.
6. After waiting 5 minutes, turn con-
trol switch or knob on the gas
valve to the ON position.
(See Fig. 14 or 15.)
7. Replace main furnace door.
(See Fig. 16.)
8. Turn on electrical supply to the
®
CL
O
S E
furnace and wait 1 minute.
(See Fig. 17.)
9. Open the external manual gas
valve. (See Fig. 18.)
10. Set room thermostat to a tempera-
ture slightly above room tempera-
ture. This will automatically
signal the furnace to start.
11. When the furnace receives the
start signal, the hot surface igni-
tor at the main burners is auto-mat-
ically heated for 15 to 20 sec.
When the microprocessor control
verifies that there is sufficient
heat to ignite, the gas valve per-
mits gas to flow to the main burn-
ers. After ignition and a time delay
of about 35 sec, the furnace blower
will start. Variable-capacity fur-
naces start at low speed until the
control makes the necessary
adjustments to operate the blower
at either the low- or high-stage
speed.
11
12
13
O
F F 2
3
1 M
P
ON
O
F F C
ON OFF
OR
FF O
14
15
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 temper-
ature that satisfies your comfort
requirements.
SUGGESTION: Setting the ther-
mostat back a few degrees and
compensating for the difference
with warmer clothing can make a
big difference in your fuel con-
sumption on extremely cold days.
The few degrees at the top of your
thermostat “comfort level” are the
most costly degrees to obtain.
When room temperature drops
below the temperature selected
on the thermostat, the furnace
will be switched on automatically.
When room temperature reaches
the degree selected on the thermo-
stat, the furnace will be switched
off automatically.
Some thermostats have a FAN
mode with 2 selections, AUTO
and ON. When thermostat is set
to AUTO, the furnace blower
cycles on and off, controlled by
the thermostat. In ON mode, the
furnace blower runs continu-
ously. This keeps the temperature
level in your home more evenly
balanced. It also continuously
filters the indoor air.
O F F 2
3
1 M
P
ON
O F F
C
ON OFF
OR
ON