Carrier 38YSA Wiring Diagram Notes, VFACTORY WIRING 24-VFIELD WIRING, Field Splice Connection

CARRIER
DUAL FUEL
THERMOSTAT			SINGLE-STAGE			HEAT PUMP
MODEL DF			FURNACE
24 VAC HOT							R
		R		R
FAN
		G		G
FURNACE
	W/W1			W			W2
							Y
COMPRESSOR	Y/Y2			Y
RVS COOLING							O
	O/W2
N/A
	Y1/W2
24 VAC COM							C
		C		C
RVS HEATING		B
				See note 7
RVS SENSING		L
OUTDOOR	S1				OUTDOOR
SENSOR					TEMPERATURE
CONNECTION	S2				SENSOR

A97538

CARRIER
DUAL FUEL			TWO-STAGE OR
THERMOSTAT			VARIABLE SPEED
MODEL DF			FURNACE				HEAT PUMP
24 VAC HOT								R
		R			R
FAN
		G			G
FURNACE LO
	W/W1			W/W1				W2
								Y
COMPRESSOR	Y/Y2			Y/Y2
RVS COOLING					O			O
	O/W2
					W2
FURNACE HI	Y1/W2
					Y1			C
24 VAC COM
		C			C
RVS HEATING		B
				See notes 7 and 8
RVS SENSING		L
OUTDOOR	S1					OUTDOOR
SENSOR						TEMPERATURE
CONNECTION	S2					SENSOR

A97539

Fig. 13—Typical 24-v Circuit Connections using Carrier Model DF Thermostat with Single- or 2-Stage Furnace

WIRING DIAGRAM NOTES:

1.CARRIER THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCU- RATE FOR MODEL NUMBERS BEGINNING WITH TSTAT _ _ _ _ _

_ _.

2.WIRING MUST CONFORM TO NEC OR LOCAL CODES.

3.SOME UNITS ARE EQUIPPED WITH PRESSURE SWITCH(ES), TEM- PERATURE SWITCH, OR 5-MINUTE COMPRESSOR CYCLE PRO- TECTION. CONNECT 24-V FIELD WIRING TO FACTORY- PROVIDED STRIPPED LEADS.

4.A LIQUID-LINE SOLENOID VALVE IS REQUIRED ON SOME UNITS.

5.THERMOSTATS ARE FACTORY CONFIGURED WITH 5-MINUTE COMPRESSOR CYCLE PROTECTION AND 4 CYCLES PER HR LIMIT. SEE THERMOSTAT INSTALLATION INSTRUCTIONS FOR DETAILS.

6.TO STAGE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS.

7.FOR DUAL FUEL THERMOSTATS, UNDERLINED LETTER ON DUAL TERMINAL INDICATES ITS USAGE.

FOR EXAMPLE: O/W2 MEANS O

O/W2 MEANS W2

OUTDOOR TEMPERATURE SENSOR MUST BE ATTACHED IN ALL DUAL FUEL INSTALLATIONS.

JUMPER WIRE BETWEEN O/W2 AND L THERMOSTAT TERMI- NALS MUST BE PRESENT.

8.Y1 AND O CONNECTIONS TO 2-STAGE FURNACES MAY NOT EXIST OR MAY ONLY BE A WIRE RATHER THAN A SCREW TERMINAL.

LEGEND

24-V FACTORY WIRING

24-V FIELD WIRING

FIELD SPLICE CONNECTION

ODT

OUTDOOR THERMOSTAT

EHR	EMERGENCY HEAT RELAY
SHR	SUPPLEMENTAL HEAT RELAY
	A97413

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