Carrier 120/C Series Installation, Start-Up, Operating And Service And Maintenance Instructions page 22

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
FIVE WIRE
THREE-WIRE
HEATING-ONLY
BLOWER DOOR SWITCH
BLK BLK
WHT WHT
GND GND
AUXILIARY
115-V FIELD-
J-BOX
SUPPLIED
DISCONNECT
FURNACE
Fig. 25—Heating and Cooling Application Wiring Diagram with 1–Stage Thermostat
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
VOLTAGE CONNECTION
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 24—Furnace Control
NOTE 2
W C R
W
C
R
O
N
T
R G
O
COM
L
NOTE 1
Y/Y2
24-V
TERMINAL
BLOCK
NOTES: 1.
2.
3.
PR-1
PL2 1
115 VAC (L1) LINE
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
THERMOSTAT
G Y
TERMINALS
CONDENSING
UNIT
TWO
WIRE
Connect Y-terminal in furnace as shown for proper blower operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
22
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
FIELD-SUPPLIED
DISCONNECT
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
GND
A02142
A99440