25
L
C
ORANGE
BLACK
RED
TRANSFORMER
240V
24V
1
2
3
CONTACTOR
LIMITS
TOP ELEMENTS, 10.0/10.8 KW
BLOWER
SWITCH
ELEMENTS
BOTTOM ELEMENT, 5.0/5.4 KW
H
BLACK
ORANGE
GREY
BLACK
YELLOW
RED
BLACK
YELLOW
RED
RED
RED
BLACK
4
2
3
1
12
3
456
1
2
3
4
56
FUSE
BLACK
BROWN
VIOLET
RED
GREY
GREY
RED
GREY
COM
CONTACTOR
RED
RED
RED
60A
ON
OFF
GRD
Single
Supply
(optional)
OR
Circuit A
Circuit B
GRD
GRD
Ground
Dual
Supply
60A
60A
ON
ON
OFF
OFF
Ground
Line
Voltage
Ground
Line
Voltage
60A
ON
OFF
CIRCUIT
BREAKERS
BLACK
BLACK
BLACK
WHITE
BLACK
BLACK
WHITE
WARNING:
Switch circuit breakers to
the OFF position before
servicing the furnace.
Legend:
CB – Circuit
Breaker
E – Heater Element
IFS – Fan Switch
Cont – Contactor
LS – Limit Switch
IFM – Fan Motor
– Fan Plug
NOTES:
1) See unit data label for recommended supply wire sizes.
2) Thermostat anticipator setting: 0.40 Amps.
3) To change blower speed on units without a relay box
refer to installation instructions.
4) Refer to furnace and/or relay box installation for
thermostat connections.
5) If any wire in this unit is to be replaced it must be replaced
with 105°C thermoplastic copper wire of the same
gauge.
6) Not suitable for use on systems exceeding 120V to
ground.
7) This wire is used with some accessories. See
accessory Installation Instructions for further details.
Figure 24. E3EH 015H, E3EH 017H Wiring Diagrams
240V
Cont 1
C
L
IFM
CB-A
CB-A
CB-B
CB-B
IFS
Transformer
LS
Bottom -
5.0/5.4
Top -
10.0/10.8
H
1
2
3
4
5
Red
Yellow
Blue
E
Cont 1
IFS
Cont 2
LS
Cont
2
Cont
1
24V
Red Pig-Tail
White Pig-Tail
6
Black
Grey
Org.
(See Note 7)
Grey Pig-Tail
E
Fuse