Steffes 5140 Owner & Installers Manual - Manual (Page 33)

Comfort Plus Hydronic Appendix  A.08
internal SySteM WirinG DiaGraM - loW voltaGe
The outdoor temperature sensor, room thermostat, and peak control
device are connected via low voltage wiring.
System low Voltage Wiring Diagram - Variable Speed ready
The "r" and "C" positions in the low voltage terminal
strip may be used as a source of 24 VAC for powering
external low voltage devices (60 VA maximum).
HAZARDOUS VOLTAGE: Risk of
electric shock. Can cause injury or
death. All low voltage wiring must
be segregated from line voltage
circuits in the system.
WARNING
YELLOW
C
R BLUE
SENSOR
DISCHARGE
HANDLER)
(OPTIONAL
DISCHARGE
WATER
AIR
AIR
SENSOR
9 RED
BROWN
YELLOW/BLACK
WHITE/BLACK
BLACK
YELLOW
ORANGE
GREEN
WHITE
13
15
16
17
14
11
12
10
ORANGE
ORANGE/BLACK
WHITE/BLACK
WHITE/RED
WHITE
YELLOW/BLACK
RED/BLACK
5
7
8
6
3
4
2
TO PROCESSOR
CONTROL BOARD
R
RLY1
P11
D4
D6
Fid 2
R1
R2
P5 D1 P10
D3 D7 D5
C3
Y1
W/
AUX Y2 G H/E O
D2
P6
P4 P2 P3
P7
P1
R C
P9 P8
2
Y1 C
2
Y2
2
O
Peak
Inputs
RP P AP
Aux.
Relay
18 GRAY
BLUE/BLACK
BLUE
20
19
1 YELLOW
+
+-
-
A
GRAY "OS"
BLUE/BLACK
BLUE "SC"
"RS"
M
CONTROL BOARD
P
M
M
WHITE/BLACK "NO"
YELLOW/BLACK
WHITE/BLACK
RED/BLACK
WHITE/RED
ORANGE
BLACK
BROWN
YELLOW
GREEN
WHITE
WHITE
RED
"Y"
"O"
"AP"
"P"
"C"
"DS"
"G"
"COM"
"NC"
"W"
"E"
"RP"
YELLOW/BLACK
ORANGE
YELLOW
ORANGE/BLACK
"R"
"Y2"
"R"
"O2"
18
19
20
5
GROUNDED
75 VA
TX1
TRANSFORMER
11
12
14
15
16
17
13
6
7
9
10
8
2
1
3
4
TO LOW VOLTAGE BOARD
5120/5130/5140
5130/5140
UPPER CORE THERMOCOUPLE
LOWER CORE THERMOCOUPLE
RED
RED
YELLOW
YELLOW