38YDB
Sizes 024–060
Two-Speed Heat Pump with Puron®
Wiring Diagrams
Fig. 1—Wiring Diagram–024, 036, 048
A00219
OFM
CCH
TO INDOOR UNIT
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 minimum of 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
CODE ON UNIT
NO DEMAND / STAND BY
LOW- CAPACITY OPERATION
HIGH-CAPAC ITY OPERATION
OUTDOOR THE RMISTOR F AILURE
COIL THERMISTOR FAILURE
THERMISTOR OUT OF RANGE
LOW PRESSURE SWITCH TRIP
HIGH PRESSURE SWITCH TRIP
COMPRESSOR VC/VH TRIP
BOARD FAILURE
326367-101 REV. A
-LEGEND-
FAN
CAP
C
O
W
Y
2
Y
1
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
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 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
CH
11
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 CAPACI TY
CONTROL
COMP
CAP
FAN
CAP
CH
CL
COMPONENT ARRANGEMENT
UNITS 036, 048
VPS
BLK
VPS
UNIT OPERATION/SEE UNIT INSTALLATION INSTRUCTIONS FOR DETAILS
1 MINUTE TIME DELAY -
WHEN CHANGING FROM LOW TO HIGH, OR HIGH TO LOW, THERE IS A 1 MINUTE TIME DELAY. 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 FACTORY SE T AT 90 MINUTES AND CAN BE CHANGED TO
EITHER 30, 60 OR 120 MINUTES.
DEFROST -
DEFROST WILL ONLY BE PERFORMED AT OUTDOOR TEMERATURES LESS THAN 50°F. DEFROST WILL INIT IATE WHEN
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 STARTI NG.
FIELD INITIATED FORCED DEFROST -
(SHOWN AS FORCED DEFROST ON BOARD) BY PLACI NG A JUMPER ACROSS THE FORCED
DEFROST TERMI NALS FOR 5 SECONDS, OR LONGER, AND THEN REMOVING THE JUMPER, THE UNIT WILL I NITIATE A
DEFROST CYCLE REGARDLESS OF COIL TEMPERATURE. THE DEFROST CYCLE 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
Y
2
Y
1
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
STAR T
CAP
NOTE #11
SCHEMATI C DIAGRAM (LADDER FORM)
H
C
C L
21
11
COMP
CAP
COMP
L2
CH
21
11
L1
23
23
CH
DUAL CAPACITY
EQUIP
GND
STAR T
RELAY
1
2
5
START
CAP
R
S
C
208 / 230 - 1 - 60
POWER SUPPLY
STAR T
CAP
STAR T
RELAY
DUAL
CAPACI TY
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
COMPRE SSOR
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
THERMISTOR (OUTDOOR AIR)
THERMISTOR COIL
OUTDOOR FAN MOTOR
REVERSING VALVE SOLEN OID
SYSTEM FUNCTION LIGHT
VAPOR PRESSURE SWITCH
COMM
COMP
HPS
LPS
OAT
OCT
OFM
RVS
STATUS
VPS
CL
CCH
CH
CAP
DCC
COMP
YEL
R
S
C
BLU
BLU
BL
U
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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
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