Wiring Diagrams; Illustrated Wiring Diagram - Alpha InTec 12SNG Installation And Servicing Instructions

8

WIRING DIAGRAMS

8.1

ILLUSTRATED WIRING DIAGRAM

Room 3-way Valve
Link
thermostat
(optional)
Supply
230 V
~ 50 Hz
G/Y R
Br Bl
3 4 5 6 7
L N 1 2
Bl Bk Gy W
X20
X21
Bl
Br
G/Y
Remove link
Br W Gy Bk Bl
to connect
Alpha controls
Bk
5
4
3
2
1
Br
Alpha controls (optional)
230 V electrical connections
Boiler
Pump
(optional)
Ignition
Electrodes
Bl
Br
Bk Br Bl
Spark
Generator
1 2
Br Bk Bl
Bl
Br
X26
Relay Board
(optional)
50 51 52 53 54 55 56 57 58
Bl
Br
Br
Bl Br
R Bl Bk Bl
Br Br Gy
L N 3 4 1 2 3 4 5 1 2 3
B A
X3 X16 X9
X10
1 2 3
Fuse
X11
3.15 AF
DHW SET
+
X15
Transformer
Low voltage electrical connections
Alpha
Storage Tank
Climatic Control
Temperature
(optional)
Probe
(optional)
External
-
Sensor +
(optional)
Resistor
Flame
Sensing
Electrode
Gy
8 9 10 11 12 13
G G W W Bk
W
W Bk Or Bk
R
W R Or Gy
2 1 7 6 5 4 3 2 1 5 4 3 2 1 8 7 6 5 4 3
X19 X12 X4 X18
R2
X6
CH SET
+
X14
X8
1
12 34 5 6
X5
X17 X7
1 2 3 4 5 6 6 5 4 3
Bk
Bl
R Or
W
System
Pressure
Fan
Switch
Flow
Sensor
Or W Or
R R Bk Bl R Or
R
Colour Code
Br
Bk Black
Bl
R
Gy
Or
G
2 1
G/Y Green/Yellow
W
11
R
10
Gy Grey
R
9
8
7
G
Remove the link between terminal
6
G
5
block connections 1 and 2 if the
4
3
optional Alpha Climatic control or
Bk
2
1
230 V room thermostat is used.
Remove the resistor between
2 1
terminal block connections 8 and 9
Br
and connect the optional tank
Bl
temperature probe in its place.
Alpha InTec S - Wiring Diagrams
Heat
Exchanger
Thermal
Fuse
Flue
Sensor
Overheat
Gas
Thermostat
Valve
W
Gy
Br
W Bk Gy
Bl
Brown
Blue
Red
Orange
Green
White
37