Carrier 38YKC Instruction Manual download pdf (Page 9)

CARRIER

DUALPUEL

THERMOSTAT

MODELDF

24 VAC HOT [_]--

FAN [_--

FURNACE _.

_OMPRESSOR _-

RVS COOLING

N/A

24 VAC COM E_-"

RVS HEATING _]

RVS SENSING

OOTOOOR1--13D-"

SINGLE-STAGE

FURNACE HEATPUMP

-4® .....

----H_

...... I

----I-E3..... _H_mi

............. _,cL__!

See note 7

OUTDOOR ]

TEMPERATURE

SENSOR

CARRIER

DUALFUEL

THERMOSTAT

MODELDF

24 VAC HOT [_-"

FAN [_-

FURNACE LO [-W'_I-- '

COMPRESSOR _-2]--"

RVS COOLING _

FURNACE HI

24 VAC COM E_--

RVS HEATING [_7

RVS SENSING

O°TDOOR[--13D'-

TWO-STAGE OR

VARIABLE SPEED

FURNACE HEAT PUMP

q-J-IZ]

---_1_ ......

See notes 7 and 8

...... I OUTDOOR

TEMPERATURE

...... SENSOR

A97539

A97538

Fig. 12--Typical 24-v Circuit Connections using Carrier Model DF Thermostat with Single- or 2-Stage Furnace

WIRING DIAGRAM NOTES:

I. 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

OAV2 MEANS W2

OUTDOOR TEMPERATURE SENSOR MUST BE AqTACHED IN ALL

DUAL FUEL INSTALLATIONS.

JUMPER WIRE BETWEEN OAV2 AND L THERMOSTAT TERMI-

NALS MUST BE PRESENT.

8. YI 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

OUTDOOR THERMOSTAT

EMERGENCY HEAT RELAY

SUPPLEMENTAL HEAT RELAY

A97413

1 2 3 4 5 6 7 8 9 10 11 12

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Carrier 38YKC Instruction Manual Page 9

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