Steffes 3100 Series - 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 n A.10
NOTE: Line Voltage Field Wiring Connections - See Figure 10 for information on circuit phasing
connections.
160 °
BLOWER
HEAT CALLFAN ON
ELEMENT 2
COM
BASE IO BOARD
#1
EXPANSION
BOARD
L2 120
L2 240
RED
COMCOM
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
NONO
COM COM
240v / 24v
ELEMENT 5 ELEMENT 6
75 VA
RED
Element
2,4,6
COM COM
NONONO
NO
NO
ELEMENT 3 ELEMENT 4
To
Relays
1,83,5,7
To
Element
To
Element
Relays Relays
BLACK
BLACK/YELLOW
BLUE
BLUE/WHITE
RELAY RELAY
RED BLUE
in the base of the
Heater & Plenum
Connectors located
L2 120
BLACK
CORE
L2 240
BLOWER
5 Amp
L1
BLACK
VARIABLE SPEED BLOWER
BLACK
CIRCUIT #1 CIRCUIT #3 CIRCUIT #2
CONTROLS
60A
NONO
COM
NO
NO
COM
1/4 Amp
COMCOM
15A 60A60A
CHARGE
BLOWERS/
CIRCUIT
CHARGE CHARGE
N.C.
9 Pin Header
LUGS
GROUND
N.C.
160 °
BLUE/WHITE
MANUAL RESET
BLUE
190 °
BLUE/BLACK
BLUE/BLACK
SEE NOTE