Carrier 38TDB See notes 1, 2, 3, 6, 8, 10, A01495, See notes 1, 2, 3, 4, A01496, A01499

THERMIDISTAT

CONTROL

MODEL RH

HEAT STAGE 2		O/W2
COOL STAGE 1	Y1/W2
		W/W1
HEAT STAGE 1
		Y/Y2
COOL STAGE 2
FAN			G
24 VAC HOT			R
DEHUMIDIFY		DHUM
24 VAC COMM			C
		HUM
HUMIDIFY
			B
N/A
OUTDOOR		S1
SENSOR		S2
CONNECTION

VARIABLE-SPEED	TWO-SPEED
CONDENSING
FURNACE	AIR CONDITIONER
W2
	Y1
W/W1
Y/Y2	Y2
G
R	R
DEHUM
DE JUMPER
C	C
HUM
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR

THERMIDISTAT

CONTROL

MODEL RH

HEAT STAGE 2		O/W2
COOL STAGE 1	Y1/W2
HEAT STAGE 1	W/W1
COOL STAGE 2		Y/ Y2
FAN			G
24 VAC HOT			R
24 VAC COMM			C
N/A
		DHUM
HUMIDIFY		HUM
N/A			B
OUTDOOR		S1
SENSOR		S2
CONNECTION

TWO-STAGE
FURNACE
WITH PSC	TWO-SPEED
BLOWER MOTOR	AIR CONDITIONER
W2
	Y1
W/W1
Y/Y2	Y2
G
R	R
C	C
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR

					See notes 1, 2, 3, 6, 8, 10, and 12
					A01495
NON-PROGRAMMABLE
THERMOSTAT		FK4C, FV4A			TWO-SPEED
MODEL 2S		OR 40FK			AIR CONDITIONER
		FAN COIL
				DH	J1 JUMPER
24 VAC HOT	R			R	R
24 VAC COMM	C			C	C
FAN	G			G
COOL STAGE 2
	Y/Y2		Y/Y2		Y2
HEAT STAGE 1	W/W1			W1
					REMOVE
					J2 JUMPER
HEAT STAGE 2					FOR HEAT
	O/W2			W2	STAGING
COOL STAGE 1	Y1			Y1	Y1
N/A	B			O
OUTDOOR	S1
SENSOR
CONNECTION	S2

							See notes 1, 2, 3, 4, and 7
								A01496
THERMIDISTAT			SINGLE-STAGE				TWO-SPEED
CONTROL
			FURNACE			AIR CONDITIONER
MODEL RH
N/A	O/W2
							Y1
COOL STAGE 1	Y1/W2
HEAT STAGE 1	W/W1				W
							Y2
COOL STAGE 2	Y/Y2				Y
FAN
		G			G
							R
24 VAC HOT		R			R
24 VAC COMM					C		C
		C
N/A	DHUM
HUMIDIFY	HUM			HUMIDIFIER
					(24 VAC)
N/A		B
				OUTDOOR
	S1
OUTDOOR					SENSOR
SENSOR	S2
CONNECTION

See notes 1, 2, 3, 6, 8, and 10

A01498

VARIABLE SPEED

80% NON-CONDENSING FURNACE

OAFS

THERMIDISTAT BOARD

CONTROL

Y1

MODEL RH

TWO-SPEED

FURNACE

COOL STAGE 1

Y1/W2

BOARD

AIR CONDITIONER

HEAT STAGE 2

O/W2

W2

Y1

HEAT STAGE 1

W/ W1

W/W1

Y2

COOL STAGE 2

Y/ Y2

Y/Y2

FAN

G

G

R

R

24 VAC HOT

R

C

24 VAC COM

C

COM

HUM

DEHUMIDIFY

DHUM

DEHUM

PL9-10

HUMIDIFY

HUM

HUMIDIFIER

(24 VAC)

N/A

B

S1

OUTDOOR

OUTDOOR

SENSOR

SENSOR

S2

CONNECTIONS

See notes 1, 2, 3, 6, 8, 10, and 11

A01499

NON-PROGRAMMABLE

SINGLE-STAGE

TWO-SPEED

THERMOSTAT

MODEL 2S

FURNACE

AIR CONDITIONER

24 VAC HOT

R

R

R

24 VAC COMM

C

C

C

HEAT STAGE 1

W/W1

W

COOL STAGE 2

Y

Y/Y2

Y2

FAN

G

G

N/A

O/W2

COOL STAGE 1

Y1

Y1

N/A

B

S1

OUTDOOR

SENSOR

S2

CONNECTION

See notes 1, 2, 3, 6, and 8

A01497See notes 1, 2, 3, and 5

A01500

Fig. 11—Typical 24V Wiring Diagram

6