Carrier 38CKB instruction manual Ð24-v Control Circuit Connections

THERMOSTAT

R

G

IFR

Y C

	THERMOSTAT	FURNACE
	R	R
	MOTOR	C
M	POWER
	SUPPLY
TRANS	G	G	C
	Y	Y
	W	W/W1

COOLING ONLY

THERMOSTAT FAN COIL

R R

C

ONE STAGE COOLING / GAS HEATING

THERMOSTAT INDOOR UNIT

R R

C

G

G

C

G

G

LLS C

Y

Y

Y

Y

W

W2

W

W

ONE STAGE COOLING / ELECTRIC HEAT	ONE STAGE COOLING / HEATING
	ACCESSORY LIQUID LINE SOLENOID

NOTES:

1.Wiring must conform to local codes.

2.LLS required on some units. See specific unit instructions.

3.Transformer required is 24-v, 40-va minimum. A 60-va or external power source may be necessary when installing accessories.

4.When installing electronic thermostat, connect transformer common to thermostat C.

LEGEND:

C	– COMPRESSOR CONTACTOR	M – INDOOR FAN MOTOR
LLS	– LIQUID LINE SOLENOID	TRANS – TRANSFORMER
		IFR – INDOOR FAN RELAY

A94331

Fig. 5Ð24-v Control Circuit Connections

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