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NOTES:
1) See unit data label for recommended supply wire sizes.
2) Thermostat anticipator setting: 0.40 Amps.
3) To change blower speeds on units without a relay box refer
to installation instructions.
4) Refer to furnace and/or relay box installation for thermo-
stat connections.
BLACK
BLOWER
SPEED
5 2
1
BLOWER
SELECTOR
RELAY
3 6
4
LEADS
RED
(See Note 7)
BLACK
RED
VIOLET
TRANSFORMER
240V
24V
GRAY
BLACK
GREY
M6 M5
SEQUENCER
GREY
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 acces-
sory Installation Instructions for further details.
C
H
MH
ML L
1
4
6
5
4
3
2
1
6
5
4
3
2
1
1
4
GREEN
GREY
RED
FUSE
ORANGE
WHITE
TOP ELEMENT, 10.0/10.8 KW
M1
M2
2
4
M4 M3
1
3
RED
BOTTOM ELEMENT, 5.0/5.4 KW
ELEMENTS
LIMITS
BLACK
RED
!
WARNING:
2
3
Switch circuit breakers to
5
6
the OFF position beore
servicing the furnace.
2
3
5
6
RED
BLACK
RED
GRD
RED
BLACK
BLACK
CIRCUIT
GRD
BREAKERS
GRD
CB-B
Seq 2
CB-A
Red Jumper Wire
(See note 8)
IFR
IFR
Seq 1
Top -
Seq 1
10.0/10.8
Fuse
4
White Pig-Tail
Green Pig-Tail
Grey Pig-Tail
Red Pig-Tail
Line
Circuit B
Voltage
Dual
Ground
Supply
Circuit A
Line
Voltage
Ground
OR
Single
Supply
(optional)
Ground
CB-B
E
LS
Bottom -
5.0/5.4
CB-A
Grey
5
IFM
H
Black
4
Blue
MH
3
C
6
Yellow
2
ML
Org.
Red
L
1
LS
E
240V
Transformer
24V
Seq
2
1
Seq
2
IFR
5
3
Legend:
IFM – Fan Motor
CB – Circuit Breaker
E – Heater Element
Seq – Sequencer
IFR – Fan Relay
LS – Limit Switch
– Fan Plug
– Control Plug
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