Steffes 4140 Owner & Installers Manual - Manual (Page 32)

Appendix
Appendix A.09 Comfort Plus
NOTE: Line Voltage Field Wiring Connections - See Figure 10 for information on circuit phasing
connections.
Line Voltage Wiring Diagram - Model 3120
240V OR 208V SYSTEMS ONLY
Use copper or aluminum conductors rated for 75 o C or higher for field connection of this device.
INTERNAL SYSTEM WIRING DIAGRAMS - LINE VOLTAGE
RELAY RELAY
COM
LIMIT
75VA
TRANSFORMER
240v 24v
ELEMENT 7
EXPANSION
BOARD
#1
COM
NO
L2 240
L2 120
ELEMENT 5
RED LIMIT
LIMIT
CORE
CORE
COM COM COM
NO
L1
1/4 Amp
NO
NO NO
ELEMENT 1 ELEMENT 3 ELEMENT 2
CORE
DAMPER
BASE IO BOARD
BLACK/YELLOW
RESISTER
RESISTOR
Element 4
Element 2
Element 1
Element 3
COM
C
IR
C
U
IT
#
2
C
O
N
T
R
O
L
S
B
L
O
W
E
R
S
/
C
IR
C
U
IT
#
1
HEAT CALL
NO
COM
COM
NO
15A 60A 60A
C
H
A
R
G
E
C
IR
C
U
IT
C
H
A
R
G
E
GROUND
LUGS
BLACK
SEE NOTE
Element 7
Element 5
Element 6
HEATING ELEMENTS
Element 8
ELEMENT 8 Element
NO
COM
Relays
1, 3, 5, 7
ELEMENT 6
To
Element
2, 4, 6, 8
Relays
To
COM
B
L
A
C
K
NO
NO
ELEMENT 4
R
E
D
N.C.
N.C.
160 °
N.C.
BLACK/YELLOW
BLOWER
L2 240
FAN ON
NO
COM
5 Amp
L2 120
L1
COM
NO
1/4 Amp
BLOWER
130 °
CORE
BLUE/WHITE
160 ° BLUE
BLACK
BLACK
VARIABLE SPEED BLOWER