Steffes 4140 Owner & Installers Manual - Manual (Page 36)

Appendix
Appendix A.13 Comfort Plus
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
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 volt-
age wiring must be segre-
gated from line voltage
circuits in the system.
WARNING
Relay Inputs
O
u
td
o o r
O
u
td
o o r
Pump VAC
24
2
Water
P3 P2 P1
Air
P11
W/
Y1 AUX Y2
J5
Y1 Y2
RLY1
J2 D1
Blower
B
C
D P4
P5
D2
J4
J3
P6
H/E
Speed
Blower
A
O G
J6
W/E
Y1 C R
J1
P
To Control Board
P7
2 Y2 2 O RP
R
P8
C
P9
NC AP COM NO
Thermostat Peak Heat Aux.
M
P M
A
M
BLUE
YELLOW
TRANSFORMER
75 VA
R
C
PROCESSOR BOARD
TO LOW VOLTAGE
TO PROCESSOR
CONTROL BOARD
CIRCUIT BOARD
+
-
+
-
LOWER BRICK CORE SENSOR
UPPER BRICK CORE SENSOR
RED
YELLOW
YELLOW
RED
3120/4120/4130/4140
3120/4130/4140
"Y2" 2 YELLOW
WHITE/BLACK
RED/BLACK
WHITE/RED
ORANGE
ORANGE
BLUE/BLACK
WHITE/BLACK
YELLOW/BLACK
ORANGE
YELLOW
BLUE
WHITE
BROWN
GRAY
BLACK
GREEN
RED
WHITE
"SC" 19
"RS" 20
"W" 10
"P"
"DS"
"OS"
"C"
"O"
"G"
"AP"
"Y"
15
17
18
16
13
14
11
12
"COM"
"RP"
"E"
"NO"
"NC"
"O2"
"R"
7
8
9
5
6
3
4
YELLOW "R" 1
SENSOR
DISCHARGE
AIR
YELLOW 1
17 BROWN
BLUE/BLACK
BLUE
GRAY
19
20
18
RED 9
YELLOW/BLACK
GREEN
WHITE/BLACK
BLACK
YELLOW
ORANGE
WHITE
13
15
16
14
11
12
10
ORANGE/BLACK
YELLOW/BLACK
WHITE/BLACK
RED/BLACK
WHITE/RED
WHITE
ORANGE
5
7
8
6
3
4
2