38AYB/38BYB1 Phase

Series 0,1

Wiring Diagrams

Fig. 138AYB018-042 (30); 048 (30,31), 38BYB018-042 (30); 048 (30,31)208-230v, 1 Phase, 60 Hertz

A95017

*CH

CONNECTION DIAGRAMRED or BLK

BLK

YEL

COMPBLK

CAP

YEL

BLU

*SR

*SCOFM

BRNBLK

BLK

208/230 1POWERSUPPLY

INDOOR THERMOSTAT (NOTE #5)

FACTORY POWER WIRINGFIELD POWER WIRINGFACTORY CONTROL WIRINGFIELD CONTROL WIRINGCONDUCTOR ON CIRCUIT BOARDCOMPONENT CONNECTION1/4-INCH QUICK CONNECTTERMINALSFIELD SPLICEJUNCTION

CAP CAPACITOR (DUAL RUN)*CH CRANKCASE HEATER

-LEGEND-

CONT

L1

11 21

SCHEMATIC DIAGRAM (LADDER FORM)

EQUIPGNDGND

EQUIP *SR

*SCH

COMP

C

FCAP

OFM

CONT

23

L2

DR

OF2OF1

OO

W2

R R

DR

RVS C

DFTDFT

Y Y

DR

*LPS *DTS *HPSC

T1CTD

T2

CONT

C

NOTES:1. COMPRESSOR AND FAN MOTOR FURNISHED WITH INHERENT THERMAL

PROTECTION.2. TO BE WIRED IN ACCORDANCE WITH NATIONAL ELECTRIC CODE (N.E.C.) AND

LOCAL CODES.3. N.E.C. CLASS 2, 24 V CIRCUIT, MIN. 40 VA REQUIRED.4. USE COPPER CONDUCTORS ONLY FROM DISCONNECT TO UNIT.5. MUST USE THERMOSTAT AND SUB-BASE AS STATED IN PRE-SALE LITERATURE.6. IF INDOOR SECTION HAS A TRANSFORMER WITH A GROUNDED SECONDARY,

CONNECT THE GROUNDED SIDE TO "C" ON THE CIRCUIT BOARD.7. IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED, USE THE

SAME OR EQUIVALENT WIRE.8. CHECK ALL ELECTRICAL CONNECTIONS INSIDE CONTROL BOX FOR TIGHTNESS.9. DO NOT ATTEMPT TO OPERATE UNIT UNTIL SERVICE VALVES HAVE BEEN

OPENED.10. WHEN DTS, LPS AND HPS ARE NOT REQUIRED, A JUMPER WILL BE INSTALLED

BETWEEN Y AND T1 ON THE DEFROST BOARD.

905030

FIELD SELECTED TIME PERIODBETWEEN DEFROST CYCLES (MINUTES)

CONT

322851-101 REV. A

COMP COMPRESSORCTD COMPRESSOR TIME DELAYCONT CONTACTORCB CIRCUIT BOARDDFT DEFROST THERMOSTATDR DEFROST RELAY AND CIRCUITRY*DTS DISCHARGE TEMP. SWITCH*HPS HIGH PRESSURE SWITCH*LPS LOW PRESSURE SWITCHOFM OUTDOOR FAN MOTORRVS REVERSING VALVE SOLENOID*SC START CAPACITOR*SR START RELAY

RED or BLK

RED

L1L2

RED

BRN

YEL*CH

SC

R

LOGIC

LOGIC

BLU

11 21

23 23

*LPS *HPS

YELBLU or YELYEL

905030

BLUBLK*DTS

BLK

BRN

BLU or YEL

TEST

C Y O W2 R E L W3 G

RW2OYC

OF2

OF1

LOGICDFT

CC

CBBLK

YELORN

WHTRED

INDOOR UNITTERMINAL BLOCK

C Y O W2 R E L G

T1

ROY

YEL

BLK

T2

LOGIC

BLK

BRN

orORN ORN

orBLK

RVSCTD

orPNK PNK

orBLK

DFT

YEL

DR

125

S

C R

23

* MAY BE FACTORY OR FIELD INSTALLED

JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLEHEAT CYCLE: 90 MIN. ACCELERATED TO 21 SEC.

50 MIN. ACCELERATED TO 12 SEC.30 MIN. ACCELERATED TO 7 SEC.

DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.

TEST

1 25

NOTETHIS DEFROST CONTROL BOARD CONTAINS A FIVE MINUTE SHORT CYCLE PROTECTOR.A FIVE MINUTE DELAY WILL OCCUR BETWEEN COMPRESSOR OFF/ON CYCLES.

YEL

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 5a 5a

PC 101 Catalog No. 533-809 Printed in U.S.A. Form 38AYB-2W Pg 1 8-95 Replaces: 38AYB-1W

Fig. 238AYB060 (30,31), 38BYB060 (30,31)208-230v, 1 Phase, 60 Hertz

A95016

FACTORY POWER WIRINGFIELD POWER WIRINGFACTORY CONTROLWIRINGFIELD CONTROL WIRINGCONDUCTOR ON CIRCUITBOARDCOMPONENT CONNECTION1/4-INCH QUICK CONNECTTERMINALSFIELD SPLICEJUNCTION

CAP CAPACITOR (DUAL RUN)*CH CRANKCASE HEATER*CHS CRANKCASE HEATER

SWITCHCOMP COMPRESSORCTD COMPRESSOR TIME DELAYCONT CONTACTORCB CIRCUIT BOARDDFT DEFROST THERMOSTATDR DEFROST RELAY AND

CIRCUITRY*DTS DISCHARGE TEMP. SWITCH*HPS HIGH PRESSURE SWITCH*LPS LOW PRESSURE SWITCHOFM OUTDOOR FAN MOTORRVS REVERSING VALVE

SOLENOID*SC START CAPACITOR*SR START RELAY*ST START THERMISTOR

* MAY BE FACTORY OR FIELDINSTALLED.

-LEGEND-

1. COMPRESSOR AND FAN MOTORFURNISHED WITH INHERENT THERMALPROTECTION.

2. TO BE WIRED IN ACCORDANCE WITHNATIONAL ELECTRIC CODE (N.E.C.)AND LOCAL CODES.

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

4. USE COPPER CONDUCTORS ONLYFROM DISCONNECT TO UNIT.

5. MUST USE THERMOSTAT AND SUB-BASE AS STATED IN PRE-SALELITERATURE.

6. IF INDOOR SECTION HAS ATRANSFORMER WITH A GROUNDEDSECONDARY, CONNECT THEGROUNDED SIDE TO "C" ON THECIRCUIT BOARD.

7. IF ANY OF THE ORIGINAL WIRE, ASSUPPLIED, MUST BE REPLACED, USETHE SAME OR EQUIVALENT WIRE.

8. CHECK ALL ELECTRICAL CONNECTIONSINSIDE CONTROL BOX FOR TIGHTNESS.

9. DO NOT ATTEMPT TO OPERATE UNITUNTIL SERVICE VALVES HAVE BEENOPENED.

10. WHEN DTS, LPS AND HPS ARE NOTREQUIRED, A JUMPER WILL BEINSTALLED BETWEEN Y AND T1 ONTHE DEFROST BOARD.

NOTEThis defrost control board contains afive minute short cycle protector. A fiveminute delay will occur betweencompressor OFF/ON cycles.

*CH BLKor

REDRED or BLK

*CHS

BLK BLKBLK

BLK

BLKBLK

208/230 1POWERSUPPLY

L1L2

EQUIPGND

CONT

YEL

OFMYEL

COMP BLU

BRN

YEL

YEL

BLUBLU

BLU*SC

BLK

*ST

*SR

CAP

C

F

CONNECTION DIAGRAM

SCHEMATIC DIAGRAM(LADDER FORM)

*CH*CHS

11 21

CONT

L1

EQUIPGND

*SR

*SC5 21

DR

H

CF

*ST

OFM

+t

CONT

2313

CAPOF2OF1

RVS

S

C R COMP

CONT

DR

LOGICDFTDFT

DROOW2

R R

Y Y

CT1

C *LPS *DTS *HPS

905030

TEST

320822-401 REV. D

LOGIC

T2CTD

1 25

11 21

13 23

SC

R

H+t

*LPS *HPS

YELBLU or YELYEL

905030

BLUBLK*DTS

BLK

BRNBLU or YEL

TEST

C Y O W2 R E L W3 G

RW2OYC

OF2

OF1

LOGICDFT

CC

CBBLK

YELORN

WHTRED

INDOOR UNITTERMINAL BLOCK

C Y O W2 R E L G INDOOR THERMOSTAT (NOTE #5)

T1

ROY

YEL

BLK

T2

LOGIC

BLK

BRN

orORN ORN

orBLK

RVSCTD

orPNK PNK

orBLK

DFT

YELYEL

DR

C

JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLEHEAT CYCLE: 90 MIN. ACCELERATED TO 21 SEC.

50 MIN. ACCELERATED TO 12 SEC.30 MIN. ACCELERATED TO 7 SEC.

DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.

FIELD SELECTED TIME PERIODBETWEEN DEFROST CYCLES (MINUTES)

NOTES:

L2

Copyright 1995 CARRIER Corp. 7310 W. Morris St. Indianapolis, IN 46231 38ayb2w

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 5a 5a

PC 101 Catalog No. 533-809 Printed in U.S.A. Form 38AYB-2W Pg 2 8-95 Replaces: 38AYB-1W