Product Overview

Ground
GRN/YEL = Ground
Ground
GRN/YEL = Ground
Ground
GRN/YEL = Ground
Ground
GRN/YEL = Ground
Ground
GRN/YEL = Ground
Using EC Max
®
to replace
PSC (Permanent Split Capacitor)
induction motors
Using EC Max
®
to replace
Constant torque
ec motors
Example connection using the optional Y-adapter.
Example connection of one speed to multiple fan relay outputs
from the HVAC system control board or fan relay(s).
R: 0
G: 105
B: 62
#00693e
GREEN SPECS
R: 0
G: 0
B: 0
#000000
BLACK SPECS
FONT: Arial Bold
®
A Solution from Packard
Line Voltage Power Supply
Cooling Demand
Y
Heat Demand
Continuous Fan Demand
24VAC Transformer Common
24VAC Transformer
Thermostat
Connections
Cool
Heat
Cont. Fan
Line
Voltage
PSC
Motor
Terminals
HVAC System
Circuit Board
L1
L2
/N
W
G
C
R
PSC
Line Voltage Power Supply
Cooling Demand
White = L2/N
Black = L1
Black = HV1
Red = HV2
YELLOW = HI
High Voltage
Power Harness
High Voltage
Signal Harness
Low Voltage
Signal Harness
ORANGE - MED HI
BROWN - MED LOW
WHITE - LOW
BLUE = COMMON
Provided
Jumper
Wires
Y
Heat Demand
Continuous Fan Demand
24VAC Transformer Common
24VAC Transformer
Thermostat
Connections
Cool
Heat
Cont. Fan
Line
Voltage
PSC
Motor
Terminals
HVAC System
Circuit Board
L1
L2
/N
W
G
C
R
Line Voltage Power Supply
White = L2/N
Black = L1
Black = HV1
Red = HV2
YELLOW = HI
High Voltage
Power Harness
High Voltage
Signal Harness
Low Voltage
Signal Harness
ORANGE - MED HI
BROWN - MED LOW
WHITE - LOW
BLUE = COMMON
Y
Thermostat
Connections
Cool
Heat
Cont. Fan
24vac
Motor Terminals
HVAC System
Circuit Board
L1
L2
/N
W
G
C
R
Common
24vac
Line Voltage Power Supply
Y
Thermostat
Connections
Cool
Heat
Cont. Fan
24vac
Motor Terminals
C
L G N
1 2 3 4 5
HVAC System
Circuit Board
SAMPLE
Constant Torque
ECM 24vac
Speed Taps
L1
L2
/N
W
G
C
R
Common
24vac
Ground
Line Voltage Power Supply
White = L2/N
Black = L1
Black = HV1
Red = HV2
YELLOW = HI
High Voltage
Power Harness
High Voltage
Signal Harness
Low Voltage
Signal Harness
ORANGE - MED HI
BROWN - MED LOW
WHITE - LOW
BLUE = COMMON
Y
Thermostat
Connections
Cool
Heat
Cont. Fan
24vac
Motor Terminals
HVAC System
Circuit Board
L1
L2
/N
W
G
C
R
Common
24vac
Line Voltage Power Supply
Cooling Demand
White = L2/N
Black = L1
Black = HV1
Red = HV2
YELLOW = HI
High Voltage
Power Harness
High Voltage
Signal Harness
Low Voltage
Signal Harness
ORANGE - MED HI
BROWN - MED LOW
WHITE - LOW
BLUE = COMMON
Provided
Jumper
Wires
Y
Heat Demand
Continuous Fan Demand
24VAC Transformer Common
24VAC Transformer
Thermostat
Connections
Cool
Heat
Cont. Fan
Line
Voltage
PSC
Motor
Terminals
HVAC System
Circuit Board
L1
L2
/N
W
G
C
R
Y-adapter
EC Max EC Max
EC MaxEC Max