Bryant 350MAV Service And Maintenance Procedures Manual page 10

BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
COOL
HEAT
SPARE-1
BLOWER SPEED
SELECTION TERMINALS
1. LED flashes a current status code, or code 11, 4 times.
Record this status code for further troubleshooting.
2. The inducer will start and continue to run until test is over.
3. Hot surface igniter (HSI) is energized for 15 sec, then
de-energized.
4. The blower motor operates on HEATING speed for 10 sec,
then turns off.
5. The blower motor operates on COOLING speed for 10 sec,
then turns off.
6. Blower operates on continuous fan speed, then turns off.
7. Inducer turns off.
8. The gas valve and humidifier terminal HUM are not
energized for safety reasons.
TWINNING AND/OR
COMPONENT TEST
TERMINAL
BLOWER OFF-DELAY
TEST/TWIN
HUM
0.5 AMP@24VAC
FUSE 3-AMP
SEC-2 SEC-1
EAC-2 L2
1-AMP@
FAN
SPARE-1 SPARE-2 EAC-1
115VAC
SPARE-2 FAN
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 12— Control Center
PR-1
PL2 1
115 VAC (L1) LINE
VOLTAGE CONNECTION
32 F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
Fig. 13—Winterizing the Furnace
—10—
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER 24-VAC
CONNECTIONS
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
A02142
A93058