INTERNAL SYSTEM WIRING DIAGRAMS - LINE VOLTAGE
Line Voltage Wiring Diagram - Model 5120
240V OR 208V SYSTEMS ONLY
NOTE 1: Line Voltage Field Wiring Connections. See Figure 8 for information on proper circuit phasing.
NOTE 2: For more information regarding pump (circulator) wiring, reference Figures 9, 15 and 16 in the
Installation section of this manual.
Use copper or aluminum conductors rated for 75
o
C or higher for field connection of this device.
A
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en
di
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Appendix
A.05
Comfort Plus Hydronic
BLACK
COM
COM
HEATING ELEMENTS
Element 2
Element 1
Element 3
Element 4
NO
NO
75VA
240v 24v
TRANSFORMER
Element 7
Element 5
Element 6
Element 8
BLACK/YELLOW
LIMIT
WHITE/BLACK
CORE
L2 240
EXPANSION
BOARD 1
COM
COM
NO
RELAY 7
RELAY 8
NO
L2 120
RED
RELAY 5
RELAY 6
COM
COM
BLACK
BLACK/YELLOW
CORE
LIMIT
To Optional Static
Heat Recovery System
COM
1/4 Amp
L1
COM
NO
COM
COM
NO
NO
NO
RELAY 2
RELAY 1
RED
RELAY 3
RELAY 4
BLUE/WHITE
BLUE/BLACK
BLUE/RED
ORANGE
To Optional Air Handler
ORANGE
DAMPER
RESISTER
RESISTOR
FAN ON
RELAY
RELAY
HEAT CALL
Relays
To
To
To
2,4,6
Relays
1, 8
Relays
3,5,7
B
L
A
C
K
B
L
U
E
R
E
D
COM.
WHITE
250
°
Red & White To
Primary Loop Pump
(Max 1.2 AMPS)
Black & White
To Air Handler Pump
(Max 1.2 AMPS)
BLUE
B
L
A
C
K
/Y
E
L
L
O
W
RED
WHITE
L1
BLOWER
L2 240
L2 120
NO
NO
COM
COM
NO
NO
1/4 Amp
5 Amp
225
°
N.C.
AUTO
RESET
N.C.
RESET
MANUAL
EXCHANGER
LIMITS
HIGH
BLACK
Cap.
4uf
CORE BLOWER
NEUTRAL LUG
C
IR
C
U
IT
#
2
C
IR
C
U
IT
#
3
C
H
A
R
G
E
C
IR
C
U
IT
#
1
C
H
A
R
G
E
C
IR
C
U
IT
C
O
N
T
R
O
L
S
B
L
O
W
E
R
S
/
C
H
A
R
G
E
CONTROL CIRCUIT
SEE NOTE 1
GROUND BAR
HIGH
SPEED
SPEED
LOW
SEE NOTE 2
