Alpha InTec2 20SE - Wiring Diagram; Illustrated Wiring Diagram

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Alpha InTec² 20SE and 30SE - Wiring Diagram
8.1 ILLUSTRATED WIRING DIAGRAM
8 WIRING DIAGRAM
Colour Code
Bk ......Black
Bl .......Blue
Br .......Brown
G ........Green
Gy ......Grey
G/Y ....Green/Yellow
Or.......Orange
R ........Red
V ........Violet
W .......White
Y ........Yellow
Component identification
A19 ..........Removable memory
B1 ............Flow sensor
B4 ............External sensor (optional)
B5 ............Return sensor
B10 ..........Flue sensor
B24 ..........Flow safety sensor
E3 ............Ignition and detection electrode
M1............Boiler pump
M20..........Fan
R8 ............Cylinder resistor
S5 ............System pressure switch
T1 ............Transformer
T2 ............Ignition unit
X70 ..........Safety thermostat low temperature jumper
Y1 ............Gas valve
CH SET
+
1
6
Programmer clock
(optional)
X21
X26
50 51 52 53 54 55 56 57 58
X20
Relay board
(optional)
Remove link to
connect clock
Mains Supply
220 V ~ 50 Hz
Remove link
to connect 220 V
room thermostat
Room
thermostat
(optional)
When an Alpha Climatic control is connected to terminals 41 and 44
remove the links between terminal blocks 1 and 2
DHW SET
+
R5
R6
Low voltage
connections
220 V
connections
V
V
E3
-UB
PWM
GND
HS
+UB
M20
Bk
Or
Bl
W
R
W Bk
Bl
Or
R
Bk
Br
Y
W
Or
Bk
R
Y1
Or
R
W
Bk
1 2 3 4
S5
Or
Or
W
Or
R
R
Bl
Bl
W
Or
V
V
B1
B24
B10
R W
R W
B5
Bl
Bl
Br
Bk
Bl BkBl R Bk
R
Br
Br
Or
Y
W Y Bl
Bk
Bk
Bl
Br
Gy
W
W
R
Gy
Br
Bl
Bk
Bl
Br
G/Y
G/Y
Br
Br
Bl
Bl
G/Y
Bk
X1 X2 X4
X9
X10
X11
X12
X13
X14
X15
X16
X6
X8
X5
R2
1
1
X7
A19
T1
T2
Fuse
3.15 AF
N
L
3 2
3
2 1 4 1 7 1
5
1
9
1
5
1
4
1
6
1
6
1
1
6
L
N
A
B
1
2
3
4
6
7
5
M1
Y
Bl
Br
Bk
Bk
PWM
GND
OUT
L N
Storage tank
NTC sensor
(optional)
3-way valve
(optional)
Alpha
Climatic Control
(optional)
X70
B4
R8
R Br
Or
Y
Bl Bk Br W Y
21
40
41
44
41 14
15
38 39 38 48
CH
DHW
M
2
1
3 4
5
Ch 1
Ch 2
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