ECM Blower Kit
For use with E3 & E4 Series Electric Furnaces
IMPORTANT SAFETY INFORMATION
INSTALLER: Please read all instructions before servicing
this equipment. Pay attention to all safety warnings and
any other special notes highlighted in the manual. Safety
markings are used frequently throughout this manual to
designate a degree or level of seriousness and should not
be ignored. WARNING - Indicates a potentially hazardous
situation that if not avoided, could result in personal injury
or death. CAUTION - Indicates a potentially hazardous
situation that if not avoided, may result in minor or moderate
injury or property damage.
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
     
power to furnace.
 
to disconnecting. Reconnect wires correctly.
 
E3 & E4 ECM Blower Data
COIL
HIGH MED-HIGH MED MED-LOW LOW
4 TON 3.5 TON 2.5-3 TON 2 TON 
Static
(ESP) in
W.C.
0.1 1655 1560 1190 940 680
0.2 1630 1530 1160 900 645
0.3 1590 1500 1130 870 615
0.4 1555 1465 1100 830 575
0.5 1525 1435 1060 800 540
0.6 1210 1110 990 860 660
INSTALLATION INSTRUCTIONS
INSTALLATION SEQUENCE

NOTE: Retain all screws and fasteners for installation of
the new blower assembly.
1. Before beginning the installation, make sure the unit is
not powered and any breakers/disconnects to the unit
are deactivated. Remove the furnace door.
2. Disconnect the thermostat wire connections and unhook
the 6-pin blower plug from the control panel socket.
3. Remove all screws attaching the blower assembly to
the furnace.
4. Slide out the complete blower assembly.
5. Replace the blower in step 4 with the ECM blower from
this kit. Slide into the same position as the removed
assembly, and then fasten with screws.
• For E3 series furnaces only: Install the grey
wire that is supplied with this kit. Determine your
appropriate model from Figures 1, 2, 3, or 4 (pages
2 & 3).
Firmly press the grey wire socket termination into
pin location #5 of the blower plug (in the control
panel) and the .25" push-on terminal into the open
contactor termination shown in Figures 1, 2, 3 & 4
(pages 2 & 3). The dashed line represents the field
installed grey wire.
• For E4 series furnaces only: Install the grey
wire that is supplied with this kit. Determine your
appropriate model from Figures 5, 6, 7, or 8 (pages
4 & 5).
a.) Temporarily remove the black wire from pin L1
on the control board.
b.) Firmly press the grey wire socket termination into
pin location #5 of the blower plug (in the control
panel) and the .25” push-on terminal into the L1
terminal.
b.) Replace the black wire onto the “piggy-back”
terminal of the grey wire at pin L1.
6. Plug the 6-pin plug from this kit into the control panel
socket.
7. Make the required thermostat wiring connections as
shown in Figure 9 (page 6).
8. Reinstall the furnace electrical panel and exterior door,
and then restore power to the unit.
The blower speed is preset at the factory for proper heating
and cooling operation. For optimum system performance
and comfort, it may be necessary to change the factory
set speed. Recommended settings are listed in Table 1
& Table 2. If heat and cool require tap 2, use the included
wire adapter and wire nut.
COOLING HEATING
MODEL
CAPACITY
(KW)
TONNAGE
MOTOR
TAP #
MODEL
CAPACITY
(KW)
MOTOR
TAP #
ALL
1.5-2 2 010-012 1
2.5-3 3 015-023 2
3.5-4 4
E3 & E4 Heating and Cooling Settings
2

1
2
3
4
5
6
5
6
2
4
TRANSFORMER
BLOWER RELAY
FUSE
CONTACTOR
ELEMENTS
LIMITS
“A” (BOTTOM)
CIRCUIT
BREAKERS
COM 240V
24V
GREY
BLACK
WHITE
RED
YELLOW
BLUE
VIOLET
GREEN
GREY
ORANGE
WHITE
RED
RED
RED
BLACK
BLACK
BLACK
RED
BLACK
BLACK
RED
GREY
BLACK
GREY
Models: E3EB-010H
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
1
2
3
4
5
6
5
6
2
4
TRANSFORMER
BLOWER RELAY
FUSE
CONTACTOR
ELEMENTS
LIMITS
“B” (TOP)
“A” (BOTTOM)
CIRCUIT
BREAKERS
COM 240V
24V
GREY
BLACK
WHITE
RED
YELLOW
BLUE
VIOLET
GREEN
GREY
ORANGE
WHITE
RED
RED
BLACK
RED
RED
BLACK
BLACK
BLACK
RED
BLACK
RED
GREY
BLACK
GREY
Models: E3EB-012H
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
Figure 2. 
3
Figure 3. 
Figure 4. E3EB-020H & E3EB-023H Electrical Diagram
1
2
3
4
5
6
5
6
2
4
TRANSFORMER
BLOWER RELAY
FUSE
CONTACTOR
CONTACTOR
ELEMENTS
ELEMENTS
LIMITS
LIMITS
“B” (TOP)
“A” (BOTTOM)
CIRCUIT
BREAKERS
COM
240V
24V
Models: E3EB-020H, 023H
GREY
BLACK
WHITE
RED
YELLOW
BLUE
VIOLET
GREEN
GREY
ORANGE
WHITE
RED
RED
GREY WHITE
RED
RED
BLACK
BLACK
RED
RED
BLACK
BLACK
BLACK
RED
BLACK
BLACK
RED
GREY
BLACK
GREY
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
1
2
3
4
5
6
5
6
2
4
TRANSFORMER
BLOWER RELAY
FUSE
CONTACTOR
CONTACTOR
ELEMENTS
LIMITS
“B” (TOP)
“A” (BOTTOM)
CIRCUIT
BREAKERS
COM 240V
24V
Models: E3EB-015H, 017H
GREY
BLACK
WHITE
RED
YELLOW
BLUE
VIOLET
GREEN
GREY
ORANGE
WHITE
RED
RED
GREY WHITE
RED
BLACK
RED
RED
BLACK
BLACK
BLACK
RED
BLACK
BLACK
RED
GREY
BLACK
GREY
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
4
CIRCUIT BREAKER
10-WHITE-11(17)
NOT ATTACHED.
CIRCUIT BREAKER
CONTROL
BOARD
Y
G
R
W
C
RC
L2
L1
HEAT
COOL
EAC
L1
L2
HEAT ER
24V
230V
1
3
5
2
4
6
AC RELAY
COMNO
DC RELAY
COMNO
DC RELAY
COMNO
LIMIT
2
1
4
3
ELEMENT
ELEMENT
AC RELAY
COMNO
1
2
3
4
5
6
RED
ORANGE
YELLOW
BLUE
H
MH
ML
L
C
BLACK
RED
GREY
WHITE
RED
GREEN
YELLOW
WHITE
GREY
RED
GREY
WHITE
BLACK
YELLOW
BLUE
BLACK
ORANGE
RED
RED
RED
WHITE
BLACK
GREY
WHITE
RED
BLACK
BLACK
BLACK
BLACK
BLUE
ORANGE
GREY
RED
RED
GREY
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
Models: E4EB-012H
GREY
Figure 5. 
Figure 6. 
CONTROL
BOARD
Y
G
R
W
C
R C
L2
L1
HEAT
COOL
EAC
L1
L2
HEAT ER
24V
230V
1
3
5
2
4
6
AC RELAY
COMNO
DC RELAY
COMNO
DC RELAY
COMNO
LIMIT
2
1
4
3
ELEMENT
ELEMENT
10-WHITE-11(17)
NOT ATTACHED.
AC RELAY
COMNO
1
2
3
4
5
6
RED
ORANGE
YELLOW
BLUE
H
MH
ML
L
C
BLACK
WHITE
WHITE
RED
GREEN
YELLOW
WHITE
GREY
BLACK
WHITE
GREY
RED
RED
YELLOW
BLUE
BLACK
ORANGE
ORANGE
GREY
BLUE
BLACK
BLACK
GREY
RED
RED
BLACK
RED
RED
BLACK
BLACK
RED
WHITE
RED
Models: E4EB-010H
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
GREY
GREY
GREY
5
10-WHITE-11(17)
NOT ATTACHED
CIRCUIT BREAKER
CIRCUIT BREAKER
CONTROL
BOARD
Y
G
R
W
C
R C
L2
L1
HEAT
COOL
EAC
L1
L2
HEAT ER
24V
230V
1
3
5
2
4
6
AC RELAY
COMNO
DC RELAY
COMNO
DC RELAY
COM
NO
LIMIT
2
1
4
3
ELEMENT
ELEMENT
AC RELAY
COMNO
1
2
3
4
5
6
RED
ORANGE
YELLOW
BLUE
H
MH
ML
L
C
BLACK
DC RELAY
COMNO
ELEMENT
LIMIT
2
1
4
3
AC RELAY
COMNO
AC RELAY
COMNO
DC RELAY
COMNO
ELEMENT
WHITE
ORANGE
ORANGE
BLUE
BLUE
WHITE
RED
GREEN
YELLOW
RED
WHITE
BLACK
YELLOW
BROWN
BLACK
RED
YELLOW
WHITE
RED
RED
WHITE
WHITE
BLACK
BLACK
WHITE
RED
RED
RED
RED
BLACK
BLACK
BLACK
RED
RED
BLACK
BLACK
RED
BLACK
RED
RED
BLACK
RED
Models: E4EB-020H, 023H
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
GREY
GREY
GREY
GREY
GREY
GREY
GREY
GREY
GREY
GREY
GREY
CIRCUIT BREAKER
10-WHITE-11(17)
NOT ATTACHED.
CIRCUIT BREAKER
CONTROL
BOARD
Y
G
R
W
C
R C
L2
L1
HEAT
COOL
EAC
L1
L2
HEAT ER
24V
230V
1
3
5
2
4
6
AC RELAY
COMNO
DC RELAY
COMNO
DC RELAY
COMNO
LIMIT
2
1
4
3
ELEMENT
ELEMENT
AC RELAY
COMNO
1
2
3
4
5
6
RED
ORANGE
YELLOW
BLUE
H
MH
ML
L
C
BLACK
DC RELAY
COMNO
ELEMENT
LIMIT
2
1
4
3
AC RELAY
COMNO
RED
ORANGE
ORANGE
WHITE
GREY
RED
GREEN
YELLOW
GREY
WHITE
GREY
BLUE
YELLOW
RED
YELLOW
BLUE
BLACK
RED
WHITE
GREY
RED
GREY
WHITE
RED
BLACK
GREY
BLACK
GREY
BLACK
RED
RED
RED
RED
WHITE
BLACK
BLACK
BLACK
RED
BLACK
RED
GREY
WHITE
BLACK
LEGEND:
FIELD INSTALLED
LOW VOLTAGE
HIGH VOLTAGE
Models: E4EB-015H, 017H
GREY

Figure 8. E4EB-020H & 023H Electrical Diagram
6
Y
E3EB & E4EB FURNACE CONTROL WIRING
(For single transformer system only)
5-Wire Thermostat
Wire
nuts
To A/C
N
L
C
To
H/P
E3EB & E4EB FURNACE CONTROL WIRING
Heat Pump Thermostat
Wire
nuts
123
456
N
L
C
To ECM Motor
Y
E3EB & E4EB FURNACE CONTROL WIRING
4-Wire Thermostat
Wire
nuts
To A/C
123
456
123
456
Grey
Black
White
Grey
White
Green
Red
Grey
N
L
C
To ECM Motor
Black
White
Grey
White
Green
Red
Green
Red
White
Grey
Grey
Black
White
To ECM Motor
W
G
RH
RC
W
G
R
GRW2 CE
O
Y
Red (See Table 2 - Heating)
Blue (See Table 2 - Cooling)
Red (See Table 2 - Heating)
Blue (See Table 2 - Cooling)
Red (See Table 2 - Heating)
Blue (See Table 2 - Cooling)
Figure 9. E3 & E4 Thermostat Connections
7
(NEW)
Specifications & illustrations subject to change without notice or incurring obligations (07/15).
O’Fallon, MO, © Nortek Global HVAC LLC 2015. All Rights Reserved.
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