Steffes 4140 Owner & Installers Manual - Manual (Page 33)

Appendix
Line Voltage Wiring Diagram - Model 4120
240V OR 208V SYSTEMS ONLY
Use copper or aluminum conductors rated for 75 o C or higher for field connection of this device.
Comfort Plus Appendix A.10
NOTE: Line Voltage Field Wiring Connections - See Figure 10 for information on circuit phasing
connections.
160 °
BLOWER
HEAT CALL FAN ON
ELEMENT 2
COM
BASE IO BOARD
#1
EXPANSION
BOARD
L2 120
L2 240
RED
COM COM
CORE
LIMIT
WHITE/BLACK
NO
L1
1/4 Amp
LIMIT
CORE
WHITE/BLACK
ELEMENT 1
BLOWER
BLACK
CORE
DAMPER
N.C.
WHITE
RESISTOR
RESISTER
Element 2
Element 1
Element 3
Element 4
COM COM
Element 7
Element 6
Element 5
HEATING ELEMENTS
Element 8
ELEMENT 7 ELEMENT 8
TRANSFORMER
NO NO
COM COM
240v / 24v
ELEMENT 5 ELEMENT 6
75 VA
RED
Element
2,4,6
COM COM
NO NO NO
NO NO
ELEMENT 3 ELEMENT 4
To
Relays
1,8 3,5,7
To
Element
To
Element
Relays Relays
B
L
A
C
K
BLACK/YELLOW
BLUE
BLUE/WHITE
RELAY RELAY
R
E
D
B
L
U
E
in the base of the
Heater & Plenum
Connectors located
L2 120
BLACK CORE
L2 240
BLOWER
5 Amp
L1
BLACK
VARIABLE SPEED BLOWER
BLACK
C
IR
C
U
IT
#
1
C
IR
C
U
IT
#
3
C
IR
C
U
IT
#
2
C
O
N
T
R
O
L
S
60A
NO NO
COM
NO NO
COM
1/4 Amp
COM COM
15A 60A 60A
C
H
A
R
G
E
B
L
O
W
E
R
S
/
C
IR
C
U
IT
C
H
A
R
G
E
C
H
A
R
G
E
N.C.
9 Pin Header
LUGS
GROUND
N.C.
160 ° BLUE/WHITE
MANUAL RESET
BLUE 190 °
B
L U
E
/B
L
A
C
K
B
L
U
E
/B
L
A
C
K
SEE NOTE