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All switch positions are shown in refrigeration cycle operation, and change position upon initiation of a defrost.
1
8145 Replacement
Mode A - No Label Required
1
2
3
F
L1
THERMOSTAT
COMPRESSOR
OR
LINE
DEFROST
SOLENOID VALVE
OR
HEATER
CONTACTOR COIL
L2
DEFAULT (Out of the Box)
4
8047 Replacement–Double Pole Switching
Mode B with 8047 Terminal Block Label Applied
N
1
3
4
L1
SOLENOID
VALVE
DEFROST
OR
HEATER
CONTACTOR
L2
7
8141 Replacement
Mode A with 8141 Terminal Block Label Applied
N
2
1
3
4
THERMOSTAT
L1
COMPRESSOR
OR
FAN
SOLENOID VALVE
DEFROST
OR
HEATER
CONTACTOR COIL
L2
10
8245 Replacement
Mode A with 8245 Terminal Block Label Applied
3
1-N
2
F
L1
THERMOSTAT
COMPRESSOR
DEFROST
LINE
OR
SOLENOID VALVE
HEATER
OR
CONTACTOR COIL
L2
All trademarks are the property of their respective owners.
DDT40 Adaptive Defrost Control
TYPICAL WIRING DIAGRAMS
2
8041 Replacement
Mode A with 8041 Terminal Block Label Applied
CONTROL
TERMINATE
POWER
INPUT
N
4
N
X
L1
TERMINATION
FAN
THERMOSTAT
MOTOR
FAN
W/FAN DELAY
L2
5
8045 Replacement
Mode A with 8045 Terminal Block Label Applied
CONTROL
TERMINATE
POWER
INPUT
2
2
8047
F
LABEL
L1
LINE
L2
8
8143 Replacement
Mode B with 8143 Terminal Block Label Applied
CONTROL
TERMINATE
POWER
INPUT
X
1
8141
LABEL
L1
TERMINATION
THERMOSTAT
W/FAN DELAY
FAN
L2
CONTROL
TERMINATE
POWER
INPUT
p
4
8245
Xp
LABEL
FAN
PRESSURE
MOTOR
SWITCH
CONTROL
TERMINATE
POWER
INPUT
3
2
4
X
1
THERMOSTAT
COMPRESSOR
OR
SOLENOID VALVE
DEFROST
OR
CONTACTOR COIL
HEATER
CONTROL
TERMINATE
POWER
INPUT
3
2
1-N
4
X
THERMOSTAT
FAN
MOTOR
COMPRESSOR
DEFROST
OR
SOLENOID VALVE
HEATER
OR
CONTACTOR COIL
CONTROL
TERMINATE
POWER
INPUT
3
4
2
N
X
HOT
CONNECT ACROSS
GAS
VALVE
COMPRESSOR
THERMOSTAT
7
3
8247 Replacement–Double Pole Switching
Mode B with 8247 Terminal Block Label Applied
N
3
1
8041
LABEL
L1
SOLENOID
VALVE
DEFROST
OR
HEATER
CONTACTOR
L2
6
120V Fan & Defrost Heater; 240V Compressor
Mode A - No Label Required
F
3
1
8045
LABEL
L1
DEFROST
FAN
HEATER
N
L2
COMPRESSOR
OR
SOLENOID VALVE
OR
CONTACTOR COIL
9
8143 Replacement–Double Pole Switching
Mode B with 8143 Terminal Block Label Applied
1
N
3
8143
LABEL
L1
TERMINATION
THERMOSTAT
SOLENOID
VALVE
W/FAN DELAY
DEFROST
OR
HEATER
CONTACTOR
L2
p
2
4
Xp
8247
LABEL
PRESSURE
SWITCH
CONTROL
TERMINATE
POWER
INPUT
2
4
N
X
THERMOSTAT
TERMINATION
THERMOSTAT
W/FAN
DELAY
CONTROL
TERMINATE
POWER
INPUT
4
2
X
8143
LABEL
TERMINATION
THERMOSTAT
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