Carrier 38YCA User Manual

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38YCA/YCN
Heat Pump Unit
Wiring Diagrams
Fig. 1—38YCA018 (331, 341), 38YCA/YCN024 (351,361), 38YCA/YCN030 (361,371),
38YCA/YCN036 (371) 208-230v, 1 Phase, 60 Hertz
A93449
DTS
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.
90
50
30
TEST
FIELD SELECTED TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED UP CYCLE
HEAT CYCLE:
50 MIN. ACCELERATED TO 12 SEC.
90 MIN. ACCELERATED TO 21 SEC.
30 MIN. ACCELERATED TO 7 SEC.
DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.
321070-401 REV. A
- LEGEND -
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 (DUAL RUN)
CRANKCASE HEATER
CRANKCASE HEATER SWITCH
COMPRESSOR
CONTACTOR
CIRCUIT BOARD
DEFROST THERMOSTAT
DEFROST RELAY AND CIRCUITRY
DISCHARGE TEMP. SWITCH
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
OUTDOOR FAN MOTOR
REVERSING VALVE SOLENOID
START CAPACITOR
START RELAY
START THERMISTOR
SC
LPS
CAP
CH
COMP
CONT
CB
DFT
DR
HPS
OFM
RVS
SR
OF2
YEL
BRN
YEL BLK
YEL
BLK BLU BLU or YEL
BLU or YEL
BRN
YEL
90
50
30
TEST
C
C
DFT
T1
Y
O
R
BLK
or
ORN
BLK or PNK
BLK
or
ORN
BLK
or
PNK
RVS
DFT
CB
OF1
ORNBLK RED
YEL WHT
C Y 0 R E L G
INDOOR UNIT
TERMINAL BLOCK
INDOOR THERMOSTAT (NOTE #5)
DR
LPS HPS
LOGIC
C Y O W2 R
CONNECTION DIAGRAM
W2 W3
C Y 0 R E L GW2
W2
23
COMP
R
C
S
CONT
23
SC
OFM
CAP
H
C
F
DR
OF1 OF2
RVS
C
DR
R
0 0
R
Y Y
C
DFT
DFT
LOGIC
DR
LPS
DTS HPS
T1
C
CONT
SR
5
2
1
L2
SCHEMATIC DIAGRAM
(LADDER FORM)
YEL
DTS
23
5
BLK
or
RED
BLK BLK
BLK
RED or BLK
CONT
208/230
POWER
SUPPLY
10
EQUIP
GND
L1
L2
11
21
23
BLK
BLU
BLU
YEL
BLUYEL
BLU
BLK
YEL
YEL
H
C
F
BRN
OFM
BLK
BLK
CH
CHS
COMP
C
S
R
SR
SC
1 2
ST
CAP
L1
11 21
CH
CHS
CONT
EQUIP
GND
CHS
ST
MAY BE FACTORY OR FIELD
INSTALLED
ST
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. 563-738 Printed in U.S.A. Form 38YCA-3W Pg 1 3-94 Replaces: 38YCA-2W
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1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Wiring Diagrams

38YCA/YCNHeat Pump UnitWiring DiagramsFig. 1—38YCA018 (331, 341), 38YCA/YCN024 (351,361), 38YCA/YCN030 (361,371),38YCA/YCN036 (371) 208-230v, 1 Phase,

Page 2 - 320500 - 401 REV. B

Fig. 2—38YCA/YCN036 (361), 38YCA/YCN042, 048 (321,331) 208-230v, 1 Phase, 60 HertzA93374C235OF2BLKorREDBLK BLKBLKRED or BLKCONT208/230POWERSUPPLY1

Page 3 - 320849 - 401 REV. B

Fig. 3—38YCA060 (321, 331) 208-230v, 1 Phase, 60 HertzA93465235OF2BLKorREDBLK BLKBLKRED or BLKCONT208/230POWERSUPPLY10EQUIPGNDL1L2112113BLKBLUBLU

Page 4 - 321069-401 REV. A

Fig. 4—38YCA036 208/230v, 3 Phase, 60 HertzA93516MAY BE FACTORY OR FIELDINSTALLED905030TESTFIELD SELECTED TIME PERIODBETWEEN DEFROST CYCLES (MINUTES

Page 5 - 321068-401 REV. A

Fig. 5—38YCA036 460v, 3 Phase, 60 HertzA93517460 30POWERSUPPLYMAY BE FACTORY OR FIELDINSTALLED905030TESTFIELD SELECTED TIME PERIODBETWEEN DEFROST

Page 6 - 320501- 401 REV. B

Fig. 6—38YCA042-060 208/230v, 3 Phase, 60 HertzA93518CHCHREDor BLKREDor BLKDTSYEL23OF2CONT208/23030 POWERSUPPLYALERT!SEE NOTE #11EQUIPGNDL1L311

Page 7 - 321011 - 401 REV. B

Fig. 7—38YCA042-060 460v, 3 Phase, 60 HertzA93464OF2YELBRNYEL BLKYELBLK BLU BLU or YELBLU or YELBRNYEL905030TESTCTDCCDFTT1T2YORBLKorORNBLKorORNRVS

Page 8 - Tab 5a 5a

Copyright 1994 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 33014cManufacturer reserves the right to discontinue, or change at any time

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