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TYPICAL
AC
FAN COIL/
THERMOSTAT
FURNACE
HEATING
W
FAN
G
24 VAC HOT
R
*
24 VAC COMM
C
COOLING
Y
N/A
O
* See note 1
Fig. 2—Typical Air Conditioner
HEAT PUMP
TYPICAL
THERMOSTAT
FAN COIL
HEAT STAGE 2
W
REVERSING
O
VALVE
FAN
G
24 VAC HOT
R
24 VAC COMM
C
HEAT/COOL
Y
STAGE 1
Fig. 4—Typical Heat Pump
1. If "power stealing" connection is used, leave off C connection between thermostat and equipment and add supplied 270 ohm resistor as
shown.
2. Supplied 270 ohm resistor MUST always be connected between Y1 and C at Two-Zone input as shown.
SINGLE-SPEED
AIR CONDITIONER
W
270 Ω, 10 W *
G
RESISTOR
(SUPPLIED)
R
C
C
Y
Y
A99114
SINGLE-SPEED
HEAT PUMP
W
W
O
O
G
R
R
C
C
Y
Y
A98217
*WIRING DIAGRAM NOTES
AC
THERMOSTAT
HEATING
FAN
24 VAC HOT
24 VAC COMM
COOLING
N/A
* See note 1
Fig. 3—Typical Heat Only
AC
THERMOSTAT
HEATING
FAN
24 VAC HOT
24 VAC COMM
COOLING
N/A
* See note 2
Fig. 5—Two-Zone with Air Conditioner
6
TYPICAL
FAN COIL/
FURNACE
W
W
G
G
R
R
270 Ω, 10 W *
*
C
RESISTOR
C
(SUPPLIED)
Y
Y
O
TWO-ZONE
THERMOSTAT
INPUT
W
W1
G
G
R
R
*
C
C
270 Ω, 10 W *
RESISTOR
(SUPPLIED)
Y
Y
1
O
A99115
A99116
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