38YCA/YCN Heat Pump Unit Wiring Diagrams

38YCA/YCN
Heat Pump Unit
Wiring Diagrams
CH
BLK
or
RED
CONNECTION DIAGRAM
CHS
BLK
BLK
RED or BLK
11 21
L2
BLU
COMP BLU
S
H
BLK C
CONT
L1
208/230 10
POWER
SUPPLY
- LEGEND BLK
BLK
C
R
YEL
23 23
YEL
EQUIP
GND
OFM
BLK
BLK
CAP
YEL
DTS
YEL BLK
ST
BLU
1
SC
F
2
5
SR
BRN
YEL
YEL
BRN
LPS
BLU
YEL
HPS
BLK BLU
BLU or YEL
BLU or YEL
YEL
DR
90
50
30
OF1
TEST
C
C
LOGIC
OF2
BRN
DFT
T1
YEL
Y
O
C Y O W2 R
CB
RVS
BLK
or
ORN
R
YEL WHT
BLK ORN RED
BLK
or
ORN
BLK or PNK
DFT
BLK
or
PNK
C Y
0 W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y
0 W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
CH
NOTES:
(LADDER FORM)
CONT
C
11 21
L2
R
COMP
S
5 2
1
SR
DR
EQUIP
GND
MAY BE FACTORY OR FIELD
INSTALLED
SCHEMATIC DIAGRAM
CHS
L1
OF1
ST
SC
H
CONT
OFM
C
OF2
RVS
C
23
23
F
CAP
DR
0 0
W2
R R
DFT
DFT
LOGIC
Y Y
DR
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (DUAL RUN)
CH
CRANKCASE HEATER
CHS CRANKCASE HEATER SWITCH
COMP COMPRESSOR
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP. SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
RVS REVERSING VALVE SOLENOID
SC
START CAPACITOR
START RELAY
SR
START THERMISTOR
ST
T1
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.
C
C
90
50
30
TEST
LPS
DTS
HPS
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED UP CYCLE
HEAT 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.
321070-401 REV. A
A93449
Fig. 1—38YCA018 (331, 341), 38YCA/YCN024 (351,361), 38YCA/YCN030 (361,371),
38YCA/YCN036 (371) 208-230v, 1 Phase, 60 Hertz
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. 563-738
Printed in U.S.A.
Form 38YCA-3W
Pg 1
3-94
Replaces: 38YCA-2W
Tab 5a 5a
CH
BLK
or
RED
BLK
COMP BLU
S
CONT
H
BLK C
11 21
C
YEL R
23 23
YEL
F
OFM BRN
L1
L2
BLK
BLK
BLK
BLK
RED or BLK
208/230 10
POWER
SUPPLY
- LEGEND -
CONNECTION DIAGRAM
CHS
BLK
EQUIP
GND
BLU
BLU
CAP
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (DUAL RUN)
CH CRANKCASE HEATER
CHS CRANKCASE HEATER SWITCH
COMP COMPRESSOR
CTD COMPRESSOR TIME DELAY
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP. SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
RVS REVERSING VALVE SOLENOID
SC START CAPACITOR
SR START RELAY
ST START THERMISTOR
YEL
ST
YEL
BLU
1
SC
2
5
SR
YEL
BRN
LPS
YEL BLK
DTS
HPS
BLK BLU
BLU or YEL
BLU or YEL
YEL
90
50
30
DR
OF1
TEST
C
C
DFT
T1
T2
LOGIC
OF2
LOGIC
CTD
C Y O W2 R
CB
BRN
YEL
Y
O
R
BLK
or
ORN
YEL WHT
BLK ORN RED
RVS
BLK
or
ORN
BLK or PNK
DFT
BLK
or
PNK
C Y O W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y O W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
SCHEMATIC DIAGRAM
CH
NOTES:
(LADDER FORM)
CHS
L1
CONT
C
11 21
L2
R
COMP
S
5
2
H
OF1
CONT
OFM
DR
EQUIP
GND
ST
SC
1
SR
C
23
23
F
CAP
OF2
RVS
C
DR
0 0
W2
R R
DFT
MAY BE FACTORY OR FIELD
INSTALLED
DFT
LOGIC
Y Y
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.
DR
T1
C
90
50
30
TEST
LPS
DTS
HPS
CTD
LOGIC
T2
C
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED UP CYCLE
HEAT 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.
320500 - 401 REV. B
N O T E
THIS DEFROST CONTROL BOARD CONTAINS
A FIVE MINUTE SHORT CYCLE PROTECTOR.
A FIVE MINUTE DELAY WILL OCCUR BETWEEN
COMPRESSOR OFF/ON CYCLES.
A93374
Fig. 2—38YCA/YCN036 (361), 38YCA/YCN042, 048 (321,331) 208-230v, 1 Phase, 60 Hertz
2
CH
BLK
or
RED
BLK
COMP BLU
S
H
CONT
L1
L2
C
R
YEL
13 23
BLK
BLK
YEL
BLU
1
SC
F
BRN
OFM
ST
YEL
YEL
EQUIP
GND
LPS
YEL BLK
CAP
BLK C
11 21
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (DUAL RUN)
CH CRANKCASE HEATER
CHS CRANKCASE HEATER SWITCH
COMP COMPRESSOR
CTD COMPRESSOR TIME DELAY
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP. SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
RVS REVERSING VALVE SOLENOID
SC START CAPACITOR
SR START RELAY
ST START THERMISTOR
BLK
BLU
BLU
BLK
RED or BLK
208/230 10
POWER
SUPPLY
- LEGEND -
CONNECTION DIAGRAM
CHS
BLK
2
5
SR
YEL
BRN
YEL
DTS
HPS
BLK BLU
BLU or YEL
BLU or YEL
YEL
90
50
30
DR
OF1
TEST
C
C
DFT
T1
T2
LOGIC
OF2
LOGIC
CTD
C Y O W2 R
CB
BRN
YEL
Y
O
R
BLK
or
ORN
YEL WHT
BLK ORN RED
RVS
BLK
or
ORN
BLK or PNK
DFT
BLK
or
PNK
C Y O W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y O W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
SCHEMATIC DIAGRAM
CH
NOTES:
(LADDER FORM)
CHS
L1
CONT
C
11 21
L2
R
COMP
S
5
2
H
OFM
DR
EQUIP
GND
OF1
ST
SC
1
SR
OF2
CONT
C
13
23
F
CAP
RVS
C
DR
0 0
W2
R R
DFT
MAY BE FACTORY OR FIELD
INSTALLED
DFT
LOGIC
Y Y
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.
DR
T1
C
90
50
30
TEST
LPS
DTS
HPS
CTD
LOGIC
T2
C
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED UP CYCLE
HEAT 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.
320849 - 401 REV. B
N O T E
THIS DEFROST CONTROL BOARD CONTAINS
A FIVE MINUTE SHORT CYCLE PROTECTOR.
A FIVE MINUTE DELAY WILL OCCUR BETWEEN
COMPRESSOR OFF/ON CYCLES.
A93465
Fig. 3—38YCA060 (321, 331) 208-230v, 1 Phase, 60 Hertz
3
CONNECTION DIAGRAM
COMP
BLK
208/230
30 POWER
SUPPLY
EQUIP
GND
YEL
RED or BLK
13 23
ALERT!
CAP
YEL
11 21
L3
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (RUN)
CH CRANKCASE HEATER
COMP COMPRESSOR
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
RVS REVERSING VALVE SOLENOID
T2
T1 T3
L1
SEE NOTE #11
- LEGEND -
BLU
L2
BLK
BLK
OFM
CH
RED
or
BLK
CONT
BRN
YEL
BLU or YEL
YEL
BRN
LPS
DTS
HPS
YEL BLK
BLK BLU
BLU or YEL
BLU or YEL
YEL
90
50
30
DR
OF1
TEST
C
C
LOGIC
OF2
BRN
DFT
T1
YEL
Y
O
C Y O W2 R
CB
BLK
or
ORN
R
YEL WHT
BLK ORN RED
RVS
BLK
or
ORN
BLK or PNK
DFT
C Y
0 W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y
0 W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
(LADDER FORM)
L2 L3
COMP
T2
CONT
11
T1 T3
21
EQUIP
GND
OFM
DR
OF1
CAP
CONT
OF2
RVS
23 13
CH
C
DR
0 0
W2
R R
DFT
DFT
LOGIC
Y Y
DR
T1
C
90
50
30
TEST
LPS
DTS
HPS
MAY BE FACTORY OR FIELD
INSTALLED
NOTES:
SCHEMATIC DIAGRAM
L1
C
BLK
or
PNK
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
TEST POINTS, FIELD SPEED UP CYCLE
HEAT 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
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.
11.IT IS IMPERATIVE TO CONNECT 30 FIELD
POWER TO UNIT WITH CORRECT PHASING.
WRONG PHASING WILL CAUSE REVERSE
ROTATION OF SCROLL COMPRESSOR
WHICH WILL RESULT IN REDUCED CURRENT
DRAW, ELEVATED NOISE LEVEL AND
IMPROPER OPERATION. IF ROTATION IS
REVERSED, SIMPLY INTERCHANGE ANY
TWO OF THE THREE POWER CONNECTIONS
ON THE FIELD SIDE.
321069-401 REV. A
A93516
Fig. 4—38YCA036 208/230v, 3 Phase, 60 Hertz
4
CONNECTION DIAGRAM
460 30
POWER
SUPPLY
13 23
RED or BLK
CH
T1 T3
BLK
11 21
L3
ALERT!
YEL
BLK
YEL
EQUIP
GND
CAP
BLK
1
BRN
RED or BLK
BLK
3
OFM
BRN
YEL
OFR
BLU or YEL
YEL
BRN
BLK
BLK or PNK
DTS
HPS
LPS
YEL BLK
BLK BLU
DFT
BLU or YEL
BLU or YEL
YEL
90
50
30
DR
OF1
BLK
or
PNK
TEST
BLK
C
C
LOGIC
OF2
DFT
T1
Y
O
C Y O W2 R
CB
COMP
T2
CONT
L1
SEE NOTE #11
- LEGEND -
BLU
L2
R
YEL
BLK
or
ORN
YEL WHT
BLK ORN RED
RVS
BLK
or
ORN
0 W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y
0 W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
NOTES:
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
CONT
T1 T3
21
OFM
OFR
CAP
CONT
3
1
RVS
DR
0 0
L2 L3
COMP
T2
EQUIP
GND
23 13
CH
C
OF1
DR
OF2
OFR
W2
R R
DFT
DFT
LOGIC
DR
Y Y
T1
C
C
90
50
30
TEST
LPS
DTS
MAY BE FACTORY OR FIELD
INSTALLED
BLK
C Y
11
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (RUN)
CH CRANKCASE HEATER
COMP COMPRESSOR
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
OFR OUTDOOR FAN RELAY
RVS REVERSING VALVE SOLENOID
CONT
HPS
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
TEST POINTS, FIELD SPEED UP CYCLE
HEAT 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
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.
11.IT IS IMPERATIVE TO CONNECT 30 FIELD
POWER TO UNIT WITH CORRECT PHASING.
WRONG PHASING WILL CAUSE REVERSE
ROTATION OF SCROLL COMPRESSOR
WHICH WILL RESULT IN REDUCED CURRENT
DRAW, ELEVATED NOISE LEVEL AND
IMPROPER OPERATION. IF ROTATION IS
REVERSED, SIMPLY INTERCHANGE ANY
TWO OF THE THREE POWER CONNECTIONS
ON THE FIELD SIDE.
321068-401 REV. A
A93517
Fig. 5—38YCA036 460v, 3 Phase, 60 Hertz
5
- LEGEND -
CONNECTION DIAGRAM
L2
208/230
30 POWER
SUPPLY
BLU
COMP
T2
BLK
T1 T3
YEL
L1
11 21
L3
13 23
ALERT!
SEE NOTE #11
EQUIP
GND
RED
or BLK
CH
RED
or BLK
CONT
BLK
BLK
CAP
YEL
OFM
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP CAPACITOR (RUN)
CRANKCASE HEATER
CH
COMP COMPRESSOR
CTD COMPRESSOR TIME DELAY
CONT CONTACTOR
CB
CIRCUIT BOARD
DFT DEFROST THERMOSTAT
DR
DEFROST RELAY AND CIRCUITRY
DTS DISCHARGE TEMP SWITCH
HPS HIGH PRESSURE SWITCH
LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
RVS REVERSING VALVE SOLENOID
BRN
YEL
LPS
YEL BLK
YEL
BRN
DTS
HPS
BLK BLU
BLU or YEL
BLU or YEL
YEL
90
50
30
DR
OF1
TEST
C
C
DFT
T1
T2
LOGIC
OF2
LOGIC
CTD
C Y O W2 R
CB
BRN
YEL
Y
O
R
BLK
or
ORN
YEL WHT
BLK ORN RED
RVS
BLK
or
ORN
BLK or PNK
DFT
C Y O W2 R E
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y O W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
MAY BE FACTORY OR FIELD
INSTALLED
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
11
T1 T3
21
OFM
DR
EQUIP
GND
NOTES:
OF1
CONT
OF2
23 CH
CAP
RVS
C
DR
0 0
W2
R R
DFT
DFT
LOGIC
Y Y
DR
T1
90
50
30
TEST
LPS
L3
L2
COMP
T2
CONT
C
BLK
or
PNK
DTS
HPS
CTD
LOGIC
T2
C
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
13
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.
11.IT IS IMPARATIVE TO CONNECT 30 FIELD
POWER TO UNIT WITH CORRECT PHASING.
WRONG PHASING WILL CAUSE REVERSE
ROTATION OF SCROLL COMPRESSOR WHICH
WILL RESULT IN REDUCED CURRENT DRAW,
ELEVATED NOISE LEVEL AND IMPROPER
OPERATION. IF ROTATION IS REVERSED,
SIMPLY INTERCHANGE ANY TWO OF THE
THREE POWER CONNECTIONS ON THE
FIELD SIDE.
320501- 401 REV. B
N O T E
THIS DEFROST CONTROL BOARD CONTAINS
A FIVE MINUTE SHORT CYCLE PROTECTOR.
A FIVE MINUTE DELAY WILL OCCUR BETWEEN
COMPRESSOR OFF/ON CYCLES.
TEST POINTS, FIELD SPEED UP CYCLE
HEAT 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
A93518
Fig. 6—38YCA042-060 208/230v, 3 Phase, 60 Hertz
6
CONNECTION DIAGRAM
L2
- LEGEND -
BLU
COMP
T2
460 30
POWER
SUPPLY
11 21
L3
BLK
BLK
YEL
YEL
13 23
ALERT!
SEE NOTE #11
RED
or BLK
T1 T3
CONT
L1
EQUIP
GND
CH
RED
or BLK
1
3
BLK
CAP
OFM
BRN
YEL
BRN
OFR
LPS
YEL BLK
BLK
YEL
BLK
DTS
HPS
BLK BLU
YEL
BLU or YEL
BRN
BLK or PNK
BLU or YEL
DFT
DR
BLK
or
PNK
90
50
30
OF1
TEST
C
C
DFT
T1
T2
LOGIC
BLK OF2
LOGIC
CTD
YEL
Y
O
R
C Y O W2 R
CB
BRN
BLK
or
ORN
RVS
YEL WHT
BLK ORN RED
BLK
or
ORN
NOTES:
L W3
G
INDOOR UNIT
TERMINAL BLOCK
C Y O W2 R E
L
G
INDOOR THERMOSTAT (NOTE #5)
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
CONT
T1 T3
21
OFM
OFR
1
CONT
3
13
23
CAP
CH
RVS
C
DR
0 0
DR
OF1
OFR
OF2
W2
R R
DFT
DFT
LOGIC
Y Y
DR
T1
C
90
50
30
TEST
LPS
L3
L2
COMP
T2
EQUIP
GND
DTS
MAY BE FACTORY OR FIELD
INSTALLED
BLK
C Y O W2 R E
11
CAP
CH
COMP
CTD
CONT
CB
DFT
DR
DTS
HPS
LPS
OFM
OFR
RVS
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAPACITOR (RUN)
CRANKCASE HEATER
COMPRESSOR
COMPRESSOR TIME DELAY
CONTACTOR
CIRCUIT BOARD
DEFROST THERMOSTAT
DEFROST RELAY AND CIRCUITRY
DISCHARGE TEMP. SWITCH
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
OUTDOOR FAN MOTOR
OUTDOOR FAN RELAY
REVERSING VALVE SOLENOID
HPS
CTD
LOGIC
T2
C
CONT
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
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.
11.IT IS IMPERATIVE TO CONNECT 30 FIELD
POWER TO UNIT WITH CORRECT PHASING.
WRONG PHASING WILL CAUSE REVERSE
ROTATION OF SCROLL COMPRESSOR
WHICH WILL RESULT IN REDUCED CURRENT
DRAW; ELEVATED NOISE LEVEL AND
IMPROPER OPERATION. IF ROTATION IS
REVERSED, SIMPLY INTERCHANGE ANY
TWO OF THE THREE POWER CONNECTIONS
ON THE FIELD SIDE.
321011 - 401 REV. B
N O T E
THIS DEFROST CONTROL BOARD CONTAINS
A FIVE MINUTE SHORT CYCLE PROTECTOR.
A FIVE MINUTE DELAY WILL OCCUR BETWEEN
COMPRESSOR OFF/ON CYCLES.
TEST POINTS, FIELD SPEED UP CYCLE
HEAT 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.
A93464
Fig. 7—38YCA042-060 460v, 3 Phase, 60 Hertz
7
Copyright 1994 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
33014c
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. 563-738
Printed in U.S.A.
Form 38YCA-3W
Pg 8
3-94
Replaces: 38YCA-2W
Tab 5a 5a