Carrier A94134 Installation, Start-Up, And Operating Instructions Manual page 7

TWO-STAGE OR
MODEL 2S
VARIABLE-SPEED
THERMOSTAT
24 VAC HOT
R
24 VAC COMM.
C
HEAT STAGE 3
W/W1
COOL/HEAT
Y/Y2
STAGE 2
FAN
G
RVS COOLING
O/W2
COOL/HEAT
Y1
STAGE 1
B
RVS HEATING
TROUBLE OR
L
CLEAN FILTER
S1
OUTDOOR
See notes 1, 4, 6, 7, and 8
SENSOR
S2
CONNECTION
Fig. 12—Two-Speed Heat Pump with 2-Stage or
Variable-Speed Furnace
MODEL 2S
THERMOSTAT
24 VAC HOT
R
24 VAC COMM
C
HEAT STAGE 3 W/W1
COOL/HEAT
Y/Y2
STAGE 2
FAN
G
RVS COOLING
O/W2
COOL/HEAT
Y1
STAGE 1
RVS HEATING
B
TROUBLE OR
L
CLEAN FILTER
S1
OUTDOOR
SENSOR
S2
CONNECTION
Fig. 13—Two-Speed Heat Pump with Typical
Fan Coil
TWO-SPEED
HEAT PUMP
FURNACE
R
R
C
C
W2
W/W1
Y/Y2 Y2
G
W3
W2
O
Y1
L
A94286
TYPICAL TWO-SPEED
FAN COIL HEAT PUMP
R R
C
C
W2 W2
*
Y/Y2
Y2
G
W3
W3
*
O
O
*
Y1
Y1
*
L L
E
See notes 4, 5, 6, 7, and 8
A94287
WIRING DIAGRAM NOTES:
1. Furnace must control second-stage heat.
2. Cut jumper R19 to convert thermostat to AC operation.
3. O/W2 can control second-stage heat. Refer to indoor equip-
ment installation instructions for proper set up.
4. Refer to outdoor unit installation instructions for latent kit
requirements.
5. Terminals marked with * are not present on all fan coils.
6. O/W2 energizes reversing valve in cooling.
7. Refer to outdoor equipment installation instructions for proper
set up.
8. Thermostat "L" terminal may control "trouble" or "clean
filter" icons, depending on clean filter option choice.
7