Bryant 311AAV Series 100 Installation, Start-Up, And Operating Instructions Manual page 15

Upflow
Horizontal
Left
If flame is proved when flame should not be present, the
furnace control CPU will lock out of Gas-Heating mode
and operate the inducer motor IDM until flame is no
longer proved.
e. Blower-On Delay- If the burner flame is proven, the
blower motor is energized on HEAT speed 25 seconds
after the gas valve GV is energized.
Simultaneously, the electronic air cleaner terminal
EAC-1 is energized and remains energized as long as the
blower motor BLWM is energized.
f. Blower-Off Delay- When the thermostat is satisfied, the
R-to-W circuit is opened, de-energizing the gas valve
GV, stopping gas flow to the burners, and de-energizing
the humidifier terminal HUM. The inducer motor IDM
will remain energized for a 5-second post-purge period.
The blower motor BLWM and air cleaner terminal
EAC-1 will remain energized for 90, 120, 150, or 180
Front
Front
Fig. 20–Vent Orientation
Downflow
Horizontal
Right
seconds (depending on the blower-OFF delay selection).
The furnace control CPU is factory-set for a 120-second
blower-OFF delay.
2. Cooling Mode
The thermostat "calls for cooling."
a. Single-Speed Cooling- (See Fig. 21 for thermostat
connections)
The thermostat closes the R-to-G-and-Y circuits. The
R-to-Y circuit starts the outdoor unit, and the R-to-G-
and-Y/Y2 circuits start the furnace blower motor BLWM
on COOL speed.
The electronic air cleaner terminal EAC-1 is energized
with 115 vac when the blower motor BLWM is operat-
ing.
When the thermostat is satisfied, the R-to-G-and-Y
circuits are opened. The outdoor unit will stop, and the
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Front
Front
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