Heating/Cooling Application Wiring Diagram; Control Board Overview - Bryant 373LAV Service And Maintenance Procedures Manual

FIVE
WIRE
THREE-WIRE
HEATING-
ONLY
BLK BLK
WHT WHT
GND GND
AUXILIARY
115-V
J-BOX
FIELD-SUPPLIED
CONTROL
DISCONNECT
FURNACE
115-VAC (L1)
POWER SUPPLY
HOT SURFACE
IGNITOR CONNECTOR
NOTE 2
W C R
W
R
G
C
NOTE 1
Y
BOX
24-V
TERMINAL
BLOCK
NOTES:
Fig. 10—Heating and Cooling Application Wiring Diagram
TEST/TWIN
HUM
SEC-1
3-AMP FUSE
COOL
HEAT
115-VAC (L2) NEUTRAL
CONNECTION
INDUCER MOTOR
CONNECTOR
Fig. 11—Control Board
—7—
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
THERMOSTAT
G Y
FIELD-SUPPLIED
TERMINALS
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
1. Connect Y-terminal as shown for proper operation.
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
24-V THERMOSTAT
TERMINALS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX)
LED OPERATION &
DIAGNOSTIC LIGHT
HARNESS CONNECTOR
24-V TRANSFORMER SEC-2
SPARE-1
BLOWER SPEED
SELECTION TERMINALS
SPARE-2
EAC-1
EAC-ELECTRONIC AIR CLEANER
TERMINALS (115-VAC 1.5 AMP MAX)
EAC-2
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
GND
A98209
A95086