Bryant 373LAV Installation, Start-Up, And Operating Instructions Manual page 9

115-VAC (L1)
POWER SUPPLY
IGNITOR CONNECTOR
THREE-WIRE
BLK BLK
WHT WHT
GND
AUXILIARY
115-VOLT FIELD-
J-BOX
SUPPLIED
FUSED
DISCONNECT
The furnace must have a 115-v power supply properly connected
and grounded. Proper polarity must be maintained for correct
operation. Thermostat wire connections at R, W, C, and Y must be
made at the 24-v terminal block on the control board. The gas
service pressure must not exceed 0.5 psig (14-in. wc), but must be
no less than 0.16 psig (4.5-in. wc).
TEST/TWIN
SEC-1
3-AMP FUSE
COOL
HEAT
HOT SURFACE
INDUCER MOTOR
CONNECTOR
→ Fig. 11—Control Board
NOTE 2
W C
FIVE
WIRE
HEATING-
ONLY
W
R
GND
G
C
NOTE 1
CONTROL
Y
BOX
24-VOLT
TERMINAL
BLOCK
NOTES:
FURNACE
→ Fig. 12—Heating and Cooling Application Wiring Diagram
24-V THERMOSTAT
TERMINALS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX)
HUM
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
115-VAC (L2) NEUTRAL
CONNECTION
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-VOLT WIRING
THERMOSTAT
R G Y
TERMINALS
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.
Before operating the furnace, check each manual reset switch for
continuity. If necessary, press the button to reset the switch.
The blower compartment door must be in place to complete the
115-v circuit to the furnace.
—9—
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-VOLT
THREE
PHASE
208/230-
VOLT
SINGLE
PHASE
GND
A95086
A95241