Appendix, C or higher for field connection of this device, A.09 comfort plus commercial hydronic – Steffes 7140 User Manual
Page 36: Base io board
Appendix
Appendix
n
A.09
Comfort Plus Commercial Hydronic
Line Voltage Wiring Diagram - Model 7140
277V AND 347V SYSTEMS ONLY
Use copper or aluminum conductors rated for 75
o
C or higher for field connection of this device.
DAMPER
BLACK/YELLOW
RED
N.C.
MANUAL
RESET
250 °
N.C.
225 °
BLUE
BL
AC
K
/Y
E
LLOW
AUTO
RESET
EXCHANGER
LIMITS
L2 120
L2 240
5 Amp
5 Amp
RESISTOR
BLOWER
L1
BLACK
WHITE
GROUND
LUG
Element
#3
Element
#9
#12
Element
#6
Element
Element
#15
SPEED
HIGH
COM
COM
RELAY
RELAY
HEAT CALL
HEAT CALL
TRANSFORMERS
SPEED
RELAY
FAN ON
RELAY
FAN ON
#14
Element
Element
Element
#2
Element
#5
#8
Element
#11
HIGH
CORE BLOWER
COM.
1/4 Amp
1/4 Amp
BASE IO BOARD
BASE IO BOARD
Element
#1
To Optional Air Handler
To Optional Static
Heat Recovery System
BLACK
ORANGE
BLUE/RED
BLUE/BLACK
BLUE/WHITE
BLACK
ORANGE
RED
RESISTER
Element
#7
Element
#10
Element
#4
#13
Element
LOW
COM
COM
NO
NO
NO
NO
COM
COM
NO
NO
240v / 24v
NO
NO
COM
COM
Cap.
4uf
SECONDARY
TRANSFORMER
TRANSFORMER
PRIMARY
SUPPLIED
Transformer
Secondary
120/240 VAC
FIELD
WHITE
Red & White To
Primary Loop Pump
(Max 1.2 AMPS)
Black & White
To Air Handler Pump
(Max 1.2 AMPS)
NEUTRAL
BAR
WHITE