C or higher for field connection of this device, Comfort plus appendix, A.12 – Steffes 4140 Owner & Installers Manual User Manual
Page 35: Ground lugs
Line Voltage Wiring Diagram - Model 4140
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.12
Appendix
NOTE: Line Voltage Field Wiring Connections - See Figure 10 for information on circuit phasing
connections.
75 VA
TRANSFORMER
240v 24v
RED
RED
RED
BLACK/YELLOW
CORE
LIMIT
LIMIT
CORE
WHITE/BLACK
LIMIT
CORE
LIMIT
CORE
BLOWER
CORE
BLOWER
CORE
RESISTOR
BLUE/WHITE
RESISTER
DAMPER
RED
BLACK/YELLOW
BLACK/YELLOW
BLACK
BASE IO BOARD
L2 120
BLOWER
L2 240
BLACK
N.C.
160 °
WHITE
L1
RELAY
FAN ON
NO
COM
NO
RELAY
COM
HEAT CALL
1/4 Amp
COM
5 Amp
NO
COM
NO
15A
60A
60A
60A
60A
C
IR
C
U
IT
#
3
C
IR
C
U
IT
#
4
B
L
O
W
E
R
S
/
C
O
N
T
R
O
L
S
C
IR
C
U
IT
#
1
C
IR
C
U
IT
#
2
C
IR
C
U
IT
C
H
A
R
G
E
C
H
A
R
G
E
C
H
A
R
G
E
C
H
A
R
G
E
SEE NOTE
Relays
Relays
Relays
Relays
ELEMENT 4
ELEMENT 3
ELEMENT 2
ELEMENT 1
Element 5
Element 2
Element 1
Element 3
Element 4
Element 15
COM
NO
NO
COM
NO
COM
COM
NO
EXPANSION
#2
BOARD
COM
COM
NO
NO
ELEMENT 14
ELEMENT 16
ELEMENT 15
ELEMENT 13
NO
NO
COM
COM
Element 10
Element 7
Element 6
Element 8
Element 9
Element 11
Element 12
Element 14
Element 13
NO
ELEMENT 9
COM
NO
ELEMENT 11
HEATING ELEMENTS
ELEMENT 8
ELEMENT 6
ELEMENT 5
ELEMENT 7
#1
BOARD
EXPANSION
COM
NO
COM
COM
NO
NO
COM
Element 16
COM
NO
ELEMENT 12
ELEMENT 10
NO
COM
1,5,9,13
COM
NO
2,6,10,14
4,8,12,16
3,7,11,15
B
L
A
C
K
R
E
D
Element
To
To
Element
B
L
U
E
B
R
O
W
N
Element
To
Element
To
GROUND
LUGS
BLACK
VARIABLE SPEED BLOWER
BLACK
Connectors located
in the base of the
9 Pin Header
B
L
U
E
/B
L
A
C
K
BLUE/WHITE
160 °
N.C.
190 °
BLUE
MANUAL RESET
N.C.
BLUE
B
L
U
E
/B
L
A
C
K
Heater & Plenum