Line Voltage Wiring Diagram - Model 4140
240V OR 208V SYSTEMS ONLY
NOTES: 1. Supply Air Blower Speed Selection Wiring - The supply air blower is configured to operate in
medium low speed for “heating” and in medium high speed for “cooling” or a “fan only”
thermostat setting.
2. Line Voltage Field Wiring Connections - See Figure 10 for information on circuit phasing
connections.
Appendix A.11 Comfort Plus
Use copper or aluminum conductors rated for 75
o
C or higher for field connection of this device.
Appendix
3,7,11,15 4,8,12,162,6,10,14
RELAY 4
1,5,9,13
RELAY 2RELAY 1 RELAY 3
50VA
Element 5
Element 2
SPEED
HIGH
SPEED
LOW
COM
NO
COM
1/4 Amp
RED
SEE NOTE 1
LOW
in the base of the
CIRCUIT #1
CONTROLS
BLOWERS/
COOLING SPEED
HEATING SPEED
Heater & Plenum
CHARGE
CHARGE
CIRCUIT
Connectors located
9 Pin Header
HEATING SPEED
COOLING SPEED
BLUE/BLACK
BLUE/RED
WHITE
YELLOW
BLUE
BLACK
HIGH
COM.
10uf
Cap.
MED. HIGH
MED. LOW
SUPPLY AIR BLOWER
BLUE/WHITE
N.C.
170 °
BLUE
190 °
MANUAL RESET
SEE NOTE 2
BLUE
BROWN
Relays
To
Relays
To
CIRCUIT #4
CIRCUIT #3
CHARGE
CHARGE
GROUND BAR
CORE
BLOWER
BLACK
CORE
BLOWER
WHITE
160 °
BLACK
N.C.
BLUE/WHITE
RESISTOR
BASE IO BOARD
BLACK/YELLOWBLACK/YELLOW
RED
DAMPER
RESISTER
RED
BLACK
Relays
ToTo
Relays
BLUE
NO
HEAT CALL
COM
RELAY
L2 240
BLOWER
NO
NO
FAN ON
COM
RELAY
5 Amp
L2 120
L1
CORE
(OPTIONAL 75VA)
240v 24v
TRANSFORMER
CORE
LIMIT
RED
RELAY 8RELAY 7
EXPANSION
BOARD 1
L2 240
HEATING ELEMENTS
Element 16
NO
COM
NO
RELAY 12
COM
RELAY 11
L1
CORE
LIMIT
L2 120
CORE
LIMIT
1/4 Amp
NONO
COMCOM
NO
RELAY 10
COM
COM
NO
RELAY 9
NONO
COMCOM
CIRCUIT #2
N.C.
Element 8
Element 9
RELAY 16
RELAY 14
RELAY 15
RELAY 13
COM
NO
COM
NO
Element 11
Element 12
Element 13
Element 14
BLACK/YELLOW
WHITE/BLACK
RELAY 6RELAY 5
LIMIT
Element 1
Element 3
Element 4
Element 15
COM
NO NO
COM
NO
COM
NO
COM
BOARD 2
EXPANSION
L2 120
L2 240
REDRED
L1
1/4 Amp
Element 10
NO
COM
NO
COM
Element 7
Element 6
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