Wiring Diagrams

38CM

Air Conditioning Unit

CH (NOTE #9)

RED or BLK

RED or BLK

COMP BLU

L1

BLK C S H

208/23010

L2 11 21

POWER

YEL R C

SUPPLY

23 23

YEL

F

EQUIP

CONT

GND

OFM BRN

BLK

BLU

(SEE NOTE #14)

BLU

BLU

Y

G

CONNECTION DIAGRAM

LLS

R

YEL

CAP

BLK

VIO

BRN

YEL

BLK

BLU

BLU

YEL

BRN

SC

(NOTE #8)

BRN

HPS DTS LPS

T2

BLU BLU BLK BLK YEL YEL

LOGIC

T1 T3

BLK

BLK

IFR

CTD

C

R

ST

1 2

5

SR

EXTERNAL

POWER

SUPPLY

24 V

(NOTES #3 & #6)

CONT

CAP

CH

COMP

CTD

DTS

HPS

IFR

LLS

LPS

OFM

SC

SR

ST

- LEGEND -

FACTORY POWER WIRING

FACTORY CONTROL WIRING

FIELD CONTROL WIRING

FIELD POWER WIRING

COMPONENT CONNECTION

FIELD SPLICE

JUNCTION

CONTACTOR

CAPACITOR (DUAL RUN)

CRANKCASE HEATER

COMPRESSOR

COMPRESSOR TIME DELAY

DISCHARGE TEMP. SWITCH

HIGH PRESSURE SWITCH

INDOOR FAN RELAY

LIQ. LINE SOLENOID VALVE

LOW PRESSURE SWITCH

OUTDOOR FAN MOTOR

START CAPACITOR

START RELAY

START THERMISTOR

INDOOR

THERMOSTAT

(NOTE #5)

INDOOR

BLOWER

MOTOR

MAY BE FACTORY OR FIELD

INSTALLED

EQUIP

GND

Y

G

R

L1

INDOOR

THERMOSTAT

CH

CONT

11 21

5 2

1

SR

(SEE NOTE #14)

SCHEMATIC DIAGRAM

(LADDER FORM)

SC

HPS DTS LPS

IFR

R C

OFM

LLS

EXTERNAL

POWER

SUPPLY 24 V

R

C

H

S

C

F

CAP

COMP

CTD

ST

T2

LOGIC

T1 T3

L2

CONT

23 23

CONT

NOTES:

1. SYMBOLS ARE ELECTRICAL

REPRESENTATIONS ONLY.

2. COMPRESSOR AND FAN MOTOR FURNISHED

WITH INHERENT THERMAL PROTECTION.

3. TO BE WIRED IN ACCORDANCE WITH

NATIONAL ELECTRIC N.E.C. CODE AND

LOCAL CODES.

4. N.E.C. CLASS 2, 24 V CIRCUIT, MIN. 40 VA

REQUIRED, 60 VA ON UNITS INSTALLED

WITH LLS.

5. USE COPPER CONDUCTORS ONLY.

6. CONNECTION FOR TYPICAL COOLING ONLY

THERMOSTAT. FOR OTHER ARRANGEMENTS,

SEE INSTALLATION INSTRUCTIONS.

7. IF INDOOR SECTION HAS A TRANSFORMER

WITH A GROUNDED SECONDARY, CONNECT

THE GROUNDED SIDE TO THE BRN LEAD.

8. WHEN START RELAY AND START

CAPACITOR ARE INSTALLED, START

THERMISTOR IS NOT USED.

9. CH NOT USED ON ALL UNITS.

10.IF ANY OF THE ORIGINAL WIRE, AS

SUPPLIED, MUST BE REPLACED, USE THE

SAME OR EQUIVALENT WIRE.

11.CHECK ALL ELECTRICAL CONNECTIONS

INSIDE CONTROL BOX FOR TIGHTNESS.

12.DO NOT ATTEMPT TO OPERATE UNIT UNTIL

SERVICE VALVES HAVE BEEN OPENED.

13.DO NOT RAPID CYCLE COMPRESSOR.

COMPRESSOR MUST BE OFF 3 MINUTES TO

ALLOW PRESSURES TO EQUALIZE

BETWEEN HIGH AND LOW SIDE BEFORE

STARTING.

14.WIRE NOT PRESENT IF HPS, LPS, DTS OR

CTD ARE USED.

317738 - 401 REV. B

Fig. 1—38CM018-048 208-230v, 1 Phase, 60 Hertz

A93410

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4 PC 101 Catalog No. 563-781 Printed in U.S.A. Form 38CM-1W Pg 1 1-94 Replaces: New

Tab 3a 2a

---

CH (NOTE #9)

RED or BLK

RED or BLK

COMP BLU

CONT

L1

BLK C S H

208/23010

L2 11 21

POWER

R C

SUPPLY

13 23 YEL

YEL F

EQUIP

GND

OFM BRN

BLK

BLU

(SEE NOTE #14)

BLU

BLU

Y

G

CONNECTION DIAGRAM

LLS

R

BLK

VIO

HPS DTS LPS

BLU BLU BLK BLK YEL YEL

BLK

BLK

YEL

IFR

CAP

BRN

YEL

BLK

BLU

BLU

YEL

BRN

SC

(NOTE #8)

BRN

T2

LOGIC

T1 T3

CTD

C

R

ST

1 2

5

SR

EXTERNAL

POWER

SUPPLY

24 V

(NOTES #3 & #6)

CONT

CAP

CH

COMP

CTD

DTS

HPS

IFR

LLS

LPS

OFM

SC

SR

ST

- LEGEND -

FACTORY POWER WIRING

FACTORY CONTROL WIRING

FIELD CONTROL WIRING

FIELD POWER WIRING

COMPONENT CONNECTION

FIELD SPLICE

JUNCTION

CONTACTOR

CAPACITOR (DUAL RUN)

CRANKCASE HEATER

COMPRESSOR

COMPRESSOR TIME DELAY

DISCHARGE TEMP. SWITCH

HIGH PRESSURE SWITCH

INDOOR FAN RELAY

LIQ. LINE SOLENOID VALVE

LOW PRESSURE SWITCH

OUTDOOR FAN MOTOR

START CAPACITOR

START RELAY

START THERMISTOR

INDOOR

THERMOSTAT

(NOTE #5)

INDOOR

BLOWER

MOTOR

MAY BE FACTORY OR FIELD

INSTALLED

EQUIP

GND

Y

G

R

L1

INDOOR

THERMOSTAT

CH

CONT

11 21

5 2

1

SR

(SEE NOTE #14)

SCHEMATIC DIAGRAM

(LADDER FORM)

SC

HPS DTS LPS

IFR

R C

OFM

LLS

EXTERNAL

POWER

SUPPLY 24 V

R

C

S

H

C

F

COMP

CAP

CTD

ST

T2

LOGIC

T1 T3

L2

CONT

23 13

CONT

NOTES:

1. SYMBOLS ARE ELECTRICAL

REPRESENTATION ONLY.

2. COMPRESSOR AND FAN MOTOR FURNISHED

WITH INHERENT THERMAL PROTECTION.

3. TO BE WIRED IN ACCORDANCE WITH

NATIONAL ELECTRIC N.E.C. AND LOCAL

CODES.

4. N.E.C. CLASS 2, 24 V CIRCUIT, MIN 40 VA

REQUIRED, 60 VA ON UNITS INSTALLED

WITH LLS.

5. USE COPPER CONDUCTORS ONLY.

6. CONNECTION FOR TYPICAL COOLING ONLY

THERMOSTAT. FOR OTHER

ARRANGEMENTS SEE INSTALLATION

INSTRUCTIONS.

7. IF INDOOR SECTION HAS A TRANSFORMER

WITH A GROUNDED SECONDARY, CONNECT

THE GROUNDED SIDE TO THE BRN LEAD.

8. WHEN START RELAY AND START

CAPACITOR ARE INSTALLED, START

THERMISTOR IS NOT USED.

9. CH NOT USED ON ALL UNITS.

10.IF ANY OF THE ORIGINAL WIRE, AS

SUPPLIED, MUST BE REPLACED, USE THE

SAME OR EQUIVALENT WIRE.

11.CHECK ALL ELECTRICAL CONNECTIONS

INSIDE CONTROL BOX FOR TIGHTNESS.

12.DO NOT ATTEMPT TO OPERATE UNIT UNTIL

SERVICE VALVES HAVE BEEN OPENED.

13.DO NOT RAPID CYCLE COMPRESSOR.

COMPRESSOR MUST BE OFF 3 MINUTES TO

ALLOW PRESSURES TO EQUALIZE

BETWEEN HIGH AND LOW SIDE BEFORE

STARTING.

14.WIRE NOT PRESENT IF HPS, LPS, DTS OR

CTD ARE USED.

320848 - 401 REV. A

Fig. 2—38CM060 208-230v, 1 Phase, 60 Hertz

A93422

Copyright 1993 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231

13165c

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4 PC 101 Catalog No. 563-781 Printed in U.S.A. Form 38CM-1W Pg 2 1-94 Replaces: New

Tab 3a 2a