Carrier 38YRA instruction manual → ÐTypical 24-v Circuit Connections

DUAL FUEL

THERMOSTAT	SINGLE-STAGE	SINGLE-SPEED
	FURNACE	HEAT PUMP

24 VAC HOT	R	R	R
FAN	G	G
FURNACE	W/W1	W	W2
COMPRESSOR	Y/Y2	Y	Y
RVS COOLING	O/W2		O
N/A	Y1/W2
24 VAC COM	C	C	C

RVS HEATING B
		SEE NOTE 1
RVS SENSING	L
OUTDOOR	S1	OUTDOOR
		TEMPERATURE
SENSOR
	S2
CONNECTION		SENSOR

A95215

DUAL FUEL	TWO-STAGE OR	SINGLE-SPEED
THERMOSTAT	VARIABLE SPEED	HEAT PUMP
	FURNACE

24 VAC HOT	R	R	R
FAN	G	G
FURNACE LO	W/W1	W/W1	W2
COMPRESSOR	Y/Y2	Y/Y2	Y
		O
RVS COOLING	O/W2		O
FURNACE HI	Y1/W2	W2
		Y1
24 VAC COM	C	C	C

RVS HEATING B

SEE NOTES 1 AND 2

L

RVS SENSING

		OUTDOOR
	S1
OUTDOOR
		TEMPERATURE
SENSOR
	S2	SENSOR
CONNECTION

A95216

CORPORATE
NON-PROGRAMMABLE	FA, FB, FC,
THERMOSTAT		HEAT
	FD, FF
MODEL HP	FAN COIL	PUMP

CORPORATE
PROGRAMMABLE	FA, FB, FC,
THERMOSTAT	FD, FF	HEAT
MODEL HP	FAN COIL	PUMP

24 VAC HOT

24 VAC COM

HEAT STAGE 2

COOL/HEAT STAGE 1

INDOOR FAN

RVS COOLING

NOT USED

NOT USED

TROUBLE

OPTIONAL OUTDOOR SENSOR CONNECTION

R	R	R
C	C	C

W/W1 W2W2

Y/Y2 Y

G G

O/W2 O

Y1

B

L

S1

S2

24 VAC HOT

INDOOR FAN

HEAT STAGE 2

COOL/HEAT STAGE 1

RVS COOLING

NOT USED

24 VAC COM

NOT USED

TROUBLE

OPTIONAL OUTDOOR SENSOR CONNECTION

R	R	R
G	G
W/W1	W2	W2
Y/Y2		Y
O/W2		O
Y1/W2
C	C	C
B
L
S1
S2

A94390	A94391
→ Fig. 9ÐTypical 24-v Circuit Connections

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