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

24-V THERMOSTAT
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX)
24-V TRANSFORMER SEC-2
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC (L2) NEUTRAL
CONNECTION
BLOWER SPEED
SELECTION TERMINALS
operate an additional 90 seconds on COOL speed before
reverting back to continuous-blower speed.
When the R-to-G circuit is opened, the blower motor
BLWM will continue operating for an additional 5 seconds,
if no other function requires blower motor BLWM opera-
tion.
Continuous Blower Speed Selection from Thermostat-
To select different continuous-blower speeds from the room
thermostat, momentarily turn the FAN switch or push-
button on the room thermostat to OFF (AUTO) for 1-3
seconds after the blower motor BLWM is operating. The
furnace control CPU will shift the continuous-blower speed
from the factory setting of FAN to HEAT speed. Momen-
tarily turning the FAN switch to OFF (AUTO) again at the
thermostat will shift the continuous-blower speed from
HEAT to COOL. Repeating the procedure will shift the
continuous-blower speed from COOL to FAN speed. The
selection can be changed as many times as desired and is
stored in the memory to be automatically used following a
power interruption.
5. Heat Pump
(See Fig. 26, 27, 28, and 29 for thermostat connections)
When installed with a heat pump, the furnace control
automatically changes the timing sequence to avoid long
blower off times during demand defrost cycles. When the
R-to-W-and-Y1 or R-to-W-and-Y1-and-G circuits are en-
ergized the furnace control CPU will switch to or turn on
the blower motor BLWM at HEAT speed, and begin a
heating cycle. The blower motor BLWM will remain on
until the end of the prepurge period, then shut off for 24
seconds then come back on at HEAT speed. When the W
input signal disappears, the furnace control begins a normal
TERMINALS
EAC-2 L2
COOL
HEAT
SPARE-1
SPARE-2
Fig. 22–Furnace Control
BLOWER OFF DELAY
JUMPER SELECT
J1
90 5
120 4
150 3
180 2
1
TEST/TWIN
HUM
3-AMP FUSE
SEC-1
PRI
115-VAC (L1)
FAN
POWER SUPPLY
EAC-1 ELECTRONIC AIR CLEANER
TERMINALS (115-VAC 1.0 AMP MAX)
inducer post-purge period and the blower remains running
at HEAT speed for the selected blower-OFF delay period
then switches to low-cool speed (same speed as FAN). If
the R-to-W-and-Y1-and-G signals disappear at the same
time, the blower motor BLWM will remain on for the
selected blower-OFF delay period. If the R-to-W-and-Y1
signals disappear, leaving the G signal, the blower motor
BLWM will remain on for the selected blower-OFF delay
period then switch to continuous-blower speed.
When the R-to-W-and-Y/Y2, R-to-W-and-Y/Y2-and-G,
R-to-W-and-Y1-and-Y/Y2, or R-to-W-and-Y1-and-Y/Y2-
and-G circuits are energized the furnace control CPU will
switch to or turn on the blower motor BLWM at HEAT
speed, and begin a heating cycle. The blower motor BLWM
will remain on until the end of the prepurge period, then
shut off for 24 seconds then come back on at HEAT speed.
When the W input signal disappears, the furnace control
begins a normal inducer post-purge period and the blower
switches to COOL speed after a 3 second delay. If the
R-to-W-and-Y/Y2-and-G or R-to-W-and-Y1-and-Y/Y2-
and-G signals disappear at the same time, the blower motor
BLWM will remain on for the selected blower-OFF delay
period. If the R-to-W-and-Y/Y2 or R-to-W-and-Y1-and-
Y/Y2 signals disappear, leaving the G signal, the blower
motor BLWM will remain on for the selected blower-OFF
delay period then switch to continuous-blower speed.
III. START-UP PROCEDURES
1. Purge Gas Lines:After all connections have been made,
purge the lines and check for leaks.
—17—
HARNESS CONNECTOR
HOT SURFACE
IGNITOR CONNECTOR
INDUCER MOTOR
CONNECTOR
A00381
A00381