NOTES:
1. CARRIER THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS BEGINNING WITH TSTAT
_ _ _ _ _ _ _.
2. WIRING MUST CONFORM TO NEC OR LOCAL CODES.
3. SOME UNITS ARE EQUIPPED WITH PRESSURE SWITCH(ES), TEMPERATURE SWITCH, OR 5-MINUTE COMPRESSOR
CYCLE PROTECTION. CONNECT 24-V FIELD WIRING TO FACTORY-PROVIDED STRIPPED LEADS.
4. A LIQUID-LINE SOLENOID VALVE IS REQUIRED ON SOME UNITS.
5. THERMOSTATS ARE FACTORY CONFIGURED WITH 5-MINUTE COMPRESSOR CYCLE PROTECTION AND 4 CYCLES PER
HOUR LIMIT. SEE THERMOSTAT INSTALLATION INSTRUCTIONS FOR DETAILS.
6. TO STAGE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS.
A97596
24 VAC HOT
R
C
W/W1
Y/Y2
G
R
DH
W2
W1
Y/Y2
CARRIER
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
FK4C, FV4A
FAN COIL
AIR
CONDITIONER
C
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
24 VAC COM
Y1
C
SEE
NOTE 2
G
O
J2 JUMPER
J1 JUMPER
A97597
24 VAC HOT
R
G
W/W1
Y/ Y2
O/W2
R
DH
W1
W2
Y/ Y2
C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL AC
FK4C, FV4A
FAN COIL
AIR
CONDITIONER
G
Y1/ W2
L
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
NOT USED
24 VAC COM
NOT USED
NOT USED
NOT USED
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
C
Y1
O
C
SEE
NOTE 2
J2 JUMPER
J1 JUMPER
24 VAC HOT
R
W
Y
G
R
DH
W1
W2
Y/Y2
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT
FK4C, FV4A
FAN COIL
AIR
CONDITIONER
C
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
Y1
C
SEE
NOTE 2
G
O
J1 JUMPER
J2
JUMPER
A97592
Fig. 5—Typical 24-v Circuit Connections (Continued)
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
CONTACTOR
C
A97368
6
