Appendix, C or higher for field connection of this device, Field – Steffes 7140 User Manual
Page 32: A.05 comfort plus commercial hydronic, Base io board
Appendix
Appendix
n
A.05
Comfort Plus Commercial Hydronic
Line Voltage Wiring Diagram - Model 7120
277V AND 347V SYSTEMS ONLY
Use copper or aluminum conductors rated for 75
o
C or higher for field connection of this device.
120/240 VAC
Secondary
Transformer
SUPPLIED
#1
To Optional Air Handler
To Optional Static
Heat Recovery System
#7
Element
Element
#4
Element
ORANGE
WHITE/BLACK
ORANGE
BLUE/WHITE
BLUE/BLACK
BLACK
OR
WHITE
BLACK
RED
Red & White To
Primary Loop Pump
(Max 1.2 AMPS)
Black & White
To Air Handler Pump
(Max 1.2 AMPS)
SEE NOTE 2
#3
#2
Element
#6
Element
NO
NO
L2 120
BL
ACK/
Y
E
LLOW
L2 240
RED
BLOWER
BLACK/YELLOW
RESISTER
DAMPER
RESISTOR
#8
Element
Element
#5
Element
BLUE
FAN ON
FAN ON
RELAY
RELAY
NO
NO
COM
COM
5 Amp
5 Amp
WHITE
BLACK
BASE IO BOARD
BASE IO BOARD
RESET
MANUAL
AUTO
225 °
N.C.
EXCHANGER
LIMITS
RESET
L1
250 °
N.C.
CORE BLOWER
1/4 Amp
1/4 Amp
COM.
HIGH
COM
COM
NO
NO
RELAY
RELAY
HEAT CALL
HEAT CALL
COM
COM
NO
NO
NEUTRAL
BAR
WHITE
TRANSFORMERS
240v / 24v
COM
COM
4uf
Cap.
LUG
PRIMARY
GROUND
TRANSFORMER
TRANSFORMER
SECONDARY
FIELD