Carrier WeatherMaker 38YDB Quick start guide

38YDB
Sizes 024–060
Two-Speed Heat Pump with Puron®
Wiring Diagrams
Fig. 1—Wiring Diagram–024, 036, 048
A00219
OFM
CCH
TOINDOORUNIT
CONNECTION DIAGRAM
-t°
LPS
HPS
RVS
NOTES:
1. Compressor furnished with inherent thermal protection.
2. Fan motor furnished with inherent thermal protection.
3. To be wired in accordance with National Electric Code
and local codes.
4. Outdoor unit control requires a minimumof 27 VA,
24 VAC control power.
5. Use copper conductors only. use conductors suitable
for at least 75°C (167°F).
6. If indoor section has a transformer with a grounded
secondary, connect the grounded side to "C".
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 (back seated)
10.Must use thermostat listed in pre-sale literature.
11.Compressor windings shown for 2 cylinder operation.
For 1 cylinder operation reverse R and S markings.
FUNCTION LIGHT (STATUS) DEFINITION
CODEON UNIT NO DEMAND / STAND BY
LOW-CAPACITY OPERATION
HIGH-CAPAC ITY OPERATION
OUTDOOR THERMISTOR FAILURE
COILTHERMISTOR FAILURE
THERMISTOR OUTOF RANGE
LOW PRESSURE SWITCH TRIP
HIGH PRESSURE SWITCH TRIP
COMPRESSOR VC/VHTRIP
BOARD FAILURE
326367-101 REV. A
-LEGEND-
FAN
CAP
C
O
W
Y2
Y1
RA B C D
OAT
-t°
LOHI
CL
CH
D C C
OCT
-t°
LPS
HPS
OAT
-t°
LOHI
TO INDOOR UNIT
RED CCH
FAN CAP
YEL
RED
BRN
OFM
BLK
BLU/PNK
BLU/PNK
YEL/PNK
YEL/PNK
CONSTANT FLASH / NO PAUSE
ONE FLASH W/ PAUSE
TWO FLASHES W/ PAUSE
THREE FLASHES W/ PAUSE
FOUR FLASHESW/ PAUSE
ALT 3 & 4
ALT 5 & 1
ALT 5 & 2
ALT 6
CONSTANT LIGHT NO PAUSE / NO FLASH
BRN
BRN
BLK
BLK
BLK ORN
RVS
ORN RED BLU
CH11
21
23
23
YEL
BLK BLK
BLK
C L
11
21
H
C
START
COMP
RELAY
BRN
CAP
L2
L1
EQUIP GND
DUAL CAPACITY
A B C D
BLU
BRN
BRN
BLK
YEL
BRN
RVSSEVHP/AC C
OCT
DUAL CAPACITY
CONTROL COMP
CAP FAN
CAP
CH CL
COMPONENT ARRANGEMENT
UNITS 036, 048
VPSBLK
VPS
UNIT OPERATION/SEE UNIT INSTALLATION INSTRUCTIONS FOR DETAILS
1 MINUTE TIME DELAY - WHEN CHANGING FROMLOWTO HIGH, ORHIGHTO LOW,THERE ISA 1 MINUTE TIMEDELAY.NOTE,
DURING CAPACI TY CHANGE DELAY THE OUTDOOR FAN WILL REMAIN RUNNING.
CRANKCASE HEATER - OPERATES DURING OFF CYCLE.
DEFROST TIME SELECTION - (SHOWN AS DT ON BOARD) THE DEFROST INTERVAL TIME CAN BE FIELD-SELECTED, DEPENDENT
UPON LOCAL/GEOGRAPHIC REQUIREMENTS. IT IS FACTORYSE T AT 90 MINUTES AND CAN BE CHANGED TO
EITHER 30, 60 OR 120 MINUTES.
DEFROST - DEFROSTWILL ONLY BE PERFORMED AT OUTDOORTEMERATURES LESS THAN 50°F. DEFROST WILL INITIATE WHEN
TIME SELECTEDHAS ELAPSED ANDTHE COIL TEMPERATURE IS LESSTHAN 30°F. (±2°) ANDWILL TERMINATE AT
80°F. (±5°). UPON DEFROSTTERMINATION THE OUTDOOR FAN WILL DELAY 20 SECONDS BEFORE STARTI NG.
FIELD INITIATED FORCED DEFROST - (SHOWN AS FORCED DEFROST ON BOARD) BY PLACING A JUMPER ACROSS THE FORCED
DEFROSTTERMI NALS FOR 5 SECONDS, OR LONGER, AND THEN REMOVING THE JUMPER, THE UNIT WILL INITIATE A
DEFROST CYCLE REGARDLESS OF COIL TEMPERATURE. THE DEFROSTCYCLE WILL TERMINATE AT 80°F (±5°).
IF COIL TEMPERATURE IS ABOVE 30°OR OUTDOOR AMBIENT TEMPERATURE IS ABOVE 50°F, DEFROST MODE WILL
TERMINATE AFTER 30 SECONDS OF ACTIVE MODE.
12345 12
PL2
1
2
3
1
2
1
2
4
5
1
C
O
W
Y2
Y1
R
1
RVSSEVHP/AC CC
C
VH
L 2
ODF
CCH
VC
12345
PL1
PL1
PL3
12
PL2
PL5
1
2
3
1
2
1
2
4
5
YEL
BLU
BLU
BRN
BRN
1
2
YEL
5
BRN
BLU
START
CAP
NOTE #11
SCHEMATIC DIAGRAM (LADDER FORM)
H
C
C L
21
11
COMP
CAP
COMP
L2
CH
21
11
L1
23
23
CH
DUAL CAPACITY
EQUIP
GND
START
RELAY
1
2
5
START
CAP
R
S
C
208 / 230 - 1 - 60
POWERSUPPLY
START
CAP
START
RELAY
DUAL
CAPACITY
CONTROL COMP
CAP
FAN
CAP
CH CL
COMPONENT ARRANGEMENT
UNIT 024 ONLY
START
CAP
START
RELAY
VH
L 2
ODF
CCH
VC
RED
YEL
BLK
BLU
BRN
PL5
PL4
COMM STATUS
FORCED
DEFROST
TIME (MIN)
DEFROST
BLK
PL4
PL3
YEL
RED
LPS
HPS
OAT
OCT
LPS
HPS
OAT
OCT
FACTORY POWER WIRING
FIELD POWER WIRING
FIELD CONTROL WIRING
FACTORY CONTROL WIRING
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
CONTACTOR L OW CAPACI TY (24 V COIL)
CRANKCASE HEATER
CONTACTOR HI GH CAPACI TY (24 V COIL)
CAPACITOR
DUAL CAPACI TY CONTROL
SYSTEM COMMUNICATION
COMPRESSOR
HIGHPRESSURESWITCH
LOW PRESSURE SWITCH
THERMISTOR (OUTDOOR AIR)
THERMISTOR COIL
OUTDOORFANMOTOR
REVERSINGVALVE SOLEN OID
SYSTEM FUNCTION LIGHT
VAPOR PRESSURESWITCH
COMM
COMP
HPS
LPS
OAT
OCT
OFM
RVS
STATUS
VPS
CL
CCH
CH
CAP
DCC
COMP
YEL
R
S
C
BLU
BLU
BL
U
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a PC 101 Catalog No. 533-80064 Printed in U.S.A. Form 38YDB-3W Pg 1 8-02 Replaces: 38YDB-2W

Fig. 2—Wiring Diagram–037
A01380
SCHEMATIC DIAGRAM (LADDER FORM)
OFM
CCH
TO INDOOR UNIT
CONNECTION DIAGRAM
-t°
RVS
NOTES:
1. Compressor furnished with inherent thermal protection.
2. To be wired in accordance with National Electric Code
and local codes.
3. Outdoor unit control requires a minimumof 27 VA,
24 VAC control power.
4. Use copper conductors only. use conductors suitable
for at least 75°C (167°F).
5. If indoor section has a transformer with a grounded
secondary, connect the grounded side to "C".
6. If any of the original wire, as supplied, must be replaced,
use the same or equivalent wire.
7. Check all electrical connections inside control box for
tightness.
8. Do not attempt to operate unit until service valves have
been opened (back seated)
9. Must use thermostat listed in pre-sale literature.
10.Compressor windings shown for 2 cylinder operation.
For 1 cylinder operation reverse R and S markings.
FUNCTION LIGHT (STATUS) DEFINITION
CODE ON UNIT NO DEMAND / STAND BY
LOW-CAPACITY OPERATION
HIGH-CAPACITY OPERATION
OUTDOOR THERMISTOR FAILURE
COILTHERMISTORFAILURE
THERMISTOR OUT OF RANGE
LOW PRESSURE SWITCH TRIP
HIGH PRESSURE SWITCH TRIP
COMPRESSOR VC/VH TRIP
BOARD FAILURE
326365-101 REV. A
-LEGEND-
C
O
W
Y2
Y1
RA B C D VH
L 2
ODF
CCH
OAT
-t°
LOHI
CL
CH
D C C
H
C
C L
21
11
COMP
CAP
COMP
L2
CH
21
11
L1
23
23
CH
OCT
-t°
LPS
HPS
OAT
-t°
LOHI
TO INDOOR UNIT
CCH RED
BRN
BLU/PNK
BLU/PNK
YEL/PNK
YEL/PNK
CONSTANT FLASH / NO PAUSE
ONE FLASH W/ PAUSE
TWO FLASHES W/ PAUSE
THREE FLASHES W/ PAUSE
FOUR FLASHES W/ PAUSE
ALT 3 & 4
ALT 5 & 1
ALT 5 & 2
ALT 6
CONSTANT LIGHT NO PAUSE / NO FLASH
BRN
BRN
BLK
BLK
BLK ORN
RVS
ORN RED BLU
CH11
2123
23
YEL
BLK
BRN
BLK
C L
11
21
BLU
H
C
START
COMP
COMP
RELAY
BRN
CAP
BLU
BLU
L2
L1
EQUIPGND
DUAL CAPACITY
DUAL CAPACITY
A B C D
BLU
BRN BLK
EQUIP
GND
VC
YEL
BRN
COMM STATUS
RVSSEVHP/AC C
OCT
DUAL CAPACITY
CONTROL COMP
CAP START
CAP
CH CL START
RELAY
COMPONENT ARRANGEMENT
YEL
VPS
UNIT OPERATION/SEE UNIT INSTALLATION
INSTRUCTIONS FOR DETAILS
1 MINUTE TIME DELAY - WHEN CHANGING FROMLOW TO HIGH, OR HIGH TO LOW, THERE IS A 1MINUTE TIME DELAY. NOTE,
DURING CAPACITY CHANGE DELAY THE OUTDOOR FAN WILL REMAIN RUNNING.
CRANKCASE HEATER - OPERATES DURING OFF CYCLE.
DEFROST TIME SELECTION - (SHOWN AS DT ON BOARD) THE DEFROST INTERVAL TIME CAN BE FIELD-SELECTED, DEPENDENT
UPON LOCAL/GEOGRAPHIC REQUIREMENTS. IT IS FACTORY SETAT 90 MINUTES AND CAN BE CHANGED TO
EITHER 30, 60 OR 120 MINUTES.
DEFROST - DEFROST WILL ONLY BE PERFORMEDAT OUTDOOR TEMERATURES LESS THAN 50°F. DEFROST WILL INITIATEWHEN
TIME SELECTED HAS ELAPSED AND THE COIL TEMPERATURE IS LESS THAN 30°F.(±2°) AND WILL TERMINATE AT
80°F. (±5°). UPON DEFROST TERMINATION THE OUTDOOR FAN WILL DELAY 20 SECONDS BEFORE STARTING.
FIELD INITIATED FORCED DEFROST - (SHOWN AS FORCED DEFROST ON BOARD) BY PLACING A JUMPER ACROSS THE FORCED
DEFROST TERMINALS FOR 5 SECONDS, OR LONGER, AND THEN REMOVING THE JUMPER, THE UNIT WILL INITIATE A
DEFROST CYCLE REGARDLESS OF COIL TEMPERATURE. THE DEFROST CYCLE WILL TERMINATE AT 80°F (±5°) .
IF COIL TEMPERATURE ISABOVE 30 °F OR OUTDOOR AMBIENT TEMPERATURE IS ABOVE 50 °F, DEFROST MODE WILL
TERMINATE AFTER 30 SECONDS OF ACTIVE MODE.
12345 12
1
2
4
5
1
C
O
W
Y2
Y1
R
1
RVSEXVHP/AC CC
C
12345
PL1
PL1
PL4
12
PL2
1
2
3
1
2
1
2
4
5
FORCED
DEFROST
BLU
BRN
R
S
C
1
2
YEL
5
BRN
BLU
START
CAP
NOTE #10
START
RELAY
1
2
5
START
CAP
R
S
C
OFM
BLU GRN/YEL
23
23
RED
BLK
BLK
VPS
GND
2
1
3
2
1
HPS
LPS
PWM 1
PWM 2
PWM 1
PWM 2
23 23
CL
208 / 230 - 1 - 60
POWER SUPPLY
RED
YEL
BLK
BLU
BRN
PL5
YEL
BLU
PL3
PL2
TIME (MIN)
DEFROST
VH
L 2
ODF
CCH
VC
RED
YEL
BLK
BLU
BRN
PL5
PL4
PL3
YEL
BLU
BRN
YEL
FACTORY POWER WIRING
FIELD POWER WIRING
FIELD CONTROL WIRING
FACTORY CONTROL WIRING
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
CONTACTOR LOW CAPACITY (24 V COIL)
CRANKCASE HEATER
CONTACTOR HIGH CAPACITY (24 V COIL)
CAPACITOR
DUAL CAPACITY CONTROL
SYSTEM COMMUNICATION
COMPRESSOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
THERMISTOR (OUTDOOR AIR)
THERMISTORCOIL
OUTDOOR FAN MOTOR
REVERSING VALVE SOLENOID
SYSTEM FUNCTION LIGHT
VAPOR PRESSURE SWITCH
COMM
COMP
HPS
LPS
OAT
OCT
OFM
RVS
STATUS
VPS
CL
CCH
CH
CAP
DCC
OCT
OAT
LPS
HPS
OCT
OAT
LPS
HPS
2

Fig. 3—Wiring Diagram–060
A02206
OFM
CCH
TOINDOOR UNIT
CONNECTION DIAGRAM
-t°
LPS
HPS
RVS
NOTES:
1. Compressor furnished withinherent thermal protection.
2. Fan motor furnished with inherent thermal protection.
3. To be wired in accordance with National Electric Code
and local codes.
4. Outdoor unit control requires a minimumof 27VA,
24 VAC control power.
5. Use copper conductors only. use conductors suitable
for at least 75°C (167°F).
6. If indoor section has a transformer with a grounded
secondary, connect the grounded side to "C".
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 (back seated)
10.Must use thermostat listed in pre-sale literature.
11.Compressor windings shown for 2 cylinder operation.
For 1 cylinder operation reverse R and S markings.
FUNCTION LIGHT (STATUS) DEFINITION
CODE ON UNIT NO DEMAND / STAND BY
LOW-CAPACITY OPERATION
HIGH-CAPACITY OPERATION
OUTDOOR THERMISTOR FAILURE
COILTHERMISTORFAILURE
THERMISTOR OUT OF RANGE
LOWPRESSURESWITCHTRIP
HIGH PRESSURE SWITCH TRIP
COMPRESSORVC/VH TRIP
BOARD FAILURE
327897-101 REV. A
-LEGEND-
FAN
CAP
C
O
W
Y2
Y1
R
A B C D
OAT
-t°
LOHI
CL
CH
D C C
OCT
-t°
LPS
HPS
OAT
-t°
LOHI
TO INDOOR UNIT
RED CCH
FAN CAP
RED
BRN
OFM
BLK
BLU/PNK
BLU/PNK
YEL/PNK
YEL/PNK
CONSTANTFLASH / NO PAUSE
ONE FLASH W/ PAUSE
TWO FLASHES W/ PAUSE
THREEFLASHESW/ PAUSE
FOUR FLASHES W/ PAUSE
ALT 3 & 4
ALT 5 & 1
ALT 5 & 2
ALT 6
CONSTANT LIGHT NO PAUSE / NO FLASH
BRN
BRN
BLK
BLK ORN
RVS
ORN RED BLU
CH 11
21
23
13
YEL
BLK
BLK
H
C
START
COMP
RELAY
BRN
CAP
L2
L1
EQUIPGND
DUAL CAPACITY
A B C D
BLU
BRN BLK
YEL
BRN
RVSSEVHP/AC C
OCT
DUAL CAPACITY
CONTROL COMP
CAP FAN
CAP
START
CAP
CH CL START
RELAY
COMPONENT ARRANGEMENT
VPSBLK
VPS
UNITOPERATION/SEEUNIT INSTALLATION INSTRUCTIONS FOR DETAILS
1 MINUTE TIME DELAY - WHENCHANGING FROMLOWTOHIGH, ORHIGHTO LOW, THERE ISA 1 MINUTETIME DELAY. NOTE,
DURING CAPACI TY CHANGE DELAY THE OUTDOOR FAN WILL REMAIN RUNNING.
CRANKCASE HEATER - OPERATES DURING OFF CYCLE.
DEFROSTTI ME SELECTION - (SHOWN ASDT ON BOARD) THE DEFROST INTERVAL TIME CAN BE FIELD-SELECTED, DEPENDENT
UPON LOCAL/GEOGRAPHIC REQUIREMENTS. IT IS FACTORY SET AT 90 MINUTES AND CAN BE CHANGED TO
EITHER 30, 60 OR 120 MINUTES.
DEFROST - DEFROSTWILLONLYBEPERFORMEDATOUTDOORTEMERATURESLESSTHAN50°F. DEFROSTWILL INITIATEWHEN
TIME SELECTEDHAS ELAPSED ANDTHE COIL TEMPERATURE IS LESSTHAN 30°F.( ±2°) ANDWILL TERMINATEAT
80°F. (±5°). UPON DEFROSTTERMINATION THE OUTDOOR FAN WILL DELAY 20 SECONDS BEFORE STARTI NG.
FIELD INITIATED FORCED DEFROST - (SHOWNAS FORCEDDEFROST ON BOARD) BY PLACING A JUMPER ACROSS THEFORCED
DEFROSTTERMINALS FOR 5 SECONDS, OR LONGER, AND THEN REMOVING THE JUMPER, THE UNIT WILL INITIATE A
DEFROST CYCLE REGARDLESS OF COIL TEMPERATURE. THE DEFROSTCYCLE WILL TERMINATE AT 80°F(±5°).
IF COIL TEMPERATURE IS ABOVE 30°F OR OUTDOORAMBIENT TEMPERATURE IS ABOVE 50°F, DEFROST MODE WILL
TERMINATE AFTER 30 SECONDS OF ACTIVE MODE.
1234512
1
2
3
1
2
1
2
4
5
1
C
O
W
Y2
Y1
R
1
RVSSEVHP/AC CC
C
VH
L 2
ODF
CCH
VC
12345
PL1 12
PL2
1
2
3
1
2
1
2
4
5
YEL
BLU
BLK
BRN
BRN
1
2
YEL
5
BRN
BLU
START
CAP
SCHEMATI C DIAGRAM (LADDER FORM)
H
C
CL
21
11
COMP
CAP
COMP
L2
CH
21
11
L1
23CH
DUAL CAPACITY
EQUIP
GND
START
RELAY
1
2
5
START
CAP
R
S
C
CL 11
21
208 / 230 - 1 - 60
POWER SUPPLY
PL2
PL1
COMM STATUS
FORCED
DEFROST
TIME (MIN)
DEFROST
PL5
PL4
PL3
BLU YEL
BRN
YEL
RED
BLK
BLK
FACTORY POWER WIRING
FIELD POWER WIRING
FIELD CONTROL WIRING
FACTORY CONTROL WIRING
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
CONTACTOR LOW CAPA CITY (24 V COIL)
CRANKCASE HEATER
CONTACTOR HIGH CAPACITY (24 V COIL)
CAPACITOR
DUAL CAPACITY CONTROL
SYSTEM COMMUNICATION
COMPRESSOR
HIGHPRESSURESWITCH
LOW PRESSURE SWITCH
THERMISTOR (OUTDOOR AIR)
THERMISTOR COIL
OUTDOORFAN MOTOR
REVERSINGVALVE SOLENOID
SYSTEM FUNCTION LIGHT
VAPORPRESSURE SWITCH
COMM
COMP
HPS
LPS
OAT
OCT
OFM
RVS
STATUS
VPS
CL
CCH
CH
CAP
DCC
PL3
VH
L 2
ODF
CCH
VC
RED
YEL
BLK
BLU
BRN
PL5
PL4
LPS
HPS
OAT
OCT
LPS
HPS
OAT
OCT
COMP
YEL
R
S
C
NOTE #11
BLU
BLU
BL
U
3

Copyright 2002 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 38ydb3w
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a PC 101 Catalog No. 533-80064 Printed in U.S.A. Form 38YDB-3W Pg 4 8-02 Replaces: 38YDB-2W