Bryant 285B EVOLUTION Wiring Diagram

285B
R
EVOLUTION 15 HEAT PUMP
WITH PURONr REFRIGERANT
1- -1/2 TO 5 TONS

CONNECTION DIAGRAM

*SR
1
2
5
(NOTE #8)
BLK
or
BLK
RED
*C
H
*CHS
RED or BLK
L1
208/230 1Ø
L2
POWER
SUPPLY
EQUIP GND
RVS
ORG
HP
ORG
C
RVS
COMM
OPTIONAL
NON-COMMUNICATING
AS PROVIDED
CONTROL
BY MANUFACTURER
SEE NOTE #13
SEE NOTE #12
A B C D
R C Y LS W2 O
LEGEND TO INDOOR UNIT
FACTORY POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
FIELD POWER WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
PLUG RECEPTACLE
AUXR AUXILLARY HEAT RELAY
CAPACITOR (DUAL RUN)
CAP
CB CIRCUIT BOARD
CRANKCASE HEATER
*CH
CRANKCASE HEATER SWITCH
*CHS
COMP COMPRESSOR
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, 60VA on units installed with LLS.
4. Use copper conductors only from disconnect to units suitable for at least 75ºC (167ºF).
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. Symbols are electrical representation only.
11. When start relay and start capacitor are installed, start thermistor is not used.
12. For communicating control only.
13. In case of non-communicating Indoor system, disconnect factory provided wires
from A, B, C, and D terminals. Using factory provided wires connect to R, C, Y, W2,
and O terminals as required by Installation Instructions. Connect field 24V wires to
factory provided wires, cap or remove unused factory provided wires.

Wiring Diagram

BLU
CAP
BRN YEL
H
YEL
*SC
BLK
C
BLK F
BLK
CONT
YEL
11 21
23 23
C C YEL
YEL
YEL
VIO
BLK
BLU
YEL/PNK
PL4 PL3 PL2
YEL/PNK
CC HPS LPS VS VR L1 ODF
1 3 1 2 1 2
* LPS
4
3
1
2
DEFROST OCT
2
TIME
3
4 OAT
5
STATUS
QUIET
SHIFT
UTIL
FORCED
DEFROST
R C Y LS W2 O
CB
CONT CONTACTOR
DEFROST THERMOSTAT
DFT
DR DEFROST RELAY AND CIRCUITRY
HIGH PRESSURE SWITCH
*HPS
*LPS LOW PRESSURE SWITCH
LIQUID LINE SOLENOID RELAY
LLSR
OAT OUTDOOR AIR THERMISTOR
OUTDOOR COIL THERMISTOR
OCT
OUTDOOR FAN RELAY
ODFR
ODF OUTDOOR FAN
REVERSING VALVE SOLENOID
RVS
RVSR REVERSING VALVE SOLENOID
RELAY START CAPACITOR
*SC
*SR START RELAY
START THERMISTOR
*ST
* MAY BE FACTORY OR FIELD INSTALLED
Fig. 1 – Wiring Diagram — Model size 1.5 - - 5 tons, 208/230- -1
SCHEMATIC DIAGRAM (LADDER FORM)
BLU L1
CONT
*ST +t
21
11
EQUIP
GND
BLU
5
S
* CHS
C
* CH
R
COMP
ODFR
BRN
ODF
L1
ODF
RVSR
O
W2
AUXR
R
LS
BLU/PNK LLSR
Y
BLU/PNK
NOTE
* HPS
THIS DEFROST CONTROL
OCT
BOARD CONTAINS A FIVE
BRN
MINUTE SHORT CYCLE
PROTECTOR. A FIVE
BRN
MINUTE DELAY WILL
OCCUR BETWEEN
COMPRESSOR OFF/ON
BLK
CYCLES.
BLK
DIP SWITCH SETTINGS
OAT
OFF
30
(DEFAULT)
1 2 3
QUIET
SHFT
ON
SPEED
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLE
UP
1) MOMENTARILY SHORT PINS AND RELEASE TO BYPASS COMPRESSOR OFF DELAY.
2) SHORT FOR 5+ SEC. AND RELEASE FOR FORCED DEFROST.
3) PERMANENT SHORT WILL BE IGNORED.
DEFROST WILL TERMINATE IN 30 SEC. IF DFT OPEN.
DEFROST WILL TERMINATE NORMALLY IF DFT IS CLOSED.
FLASH
FAULT DEFINITION
CODE
On, No Flash Standby
1, Pause Normal Operation
16 System Communications Failure
31 High Pressure Switch
32 Low Pressure Switch
45 Control Fault
46 Brown out (24V)
53 Outside Temp Sensor
1. Compressor damage may occur if system is over charged.
2. This unit is factory charged with R-410A in accordance with the amount shown
on the rating plate. The charge is adequate for most systems using matched
coils and tubing not over 15 feet long. Check refrigerant charge for maximum
efficiency. See Product Data Literature for required Indoor air Flow Rates and
for use of line lengths over 15 feet.
3. Relieve pressure and recover all refrigerant before system repair or final
disposal. Use all service ports and open all flow-control devices, including
solenoid valves.
4. Never vent refrigerant to atmosphere. Use approved
recovery equipment.
COMP
R
C
CONT
S
* SR
23 23
2 *SC
CAP
+t°
H
1
* ST
C
ODF
F
RVS
C
L1
VS
VR
L
O
G ODFR
LPS
I
RVSR
C
AUXR
OAT
LLSR
SEE NOTE #12
A B C D K4
OCT
CB
* HPS
CONT
K4
(DEFAULT) 120 MINUTES
30 MINUTES
60 MINUTES 90 M INUTES 120
1 2 3 1 2 3 60 1 2 3 1 2
OR OR OR
90
FIELD SELECTABLE OPTIONS FOR TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
FLASH
FAULT DEFINITION
CODE
55 Coil Temp Sensor
56 Thermistor Range Error
72 Thermal Cutout
73 Contactor Shorted
74 No 230V at Compressor
82 Thermal lockout
83 Low pressure lockout
84 High pressure lockout
CAUTION
339109-101 REV. A
L2
C
3