8.1 ILLUSTRATED WIRING DIAGRAM
8 WIRING DIAGRAM
Alpha E-Tec Hybrid - Wiring Diagram
Colour Code
Bk ......Black
Bl .......Blue
Br ....... Brown
G ........Green
Gy ...... Grey
G/Y ....Green/Yellow
Or.......Orange
P ........Purple
R ........ Red
V ........Violet
W .......White
Y ........Yellow
S4 ............DHW flow switch
S5 ............System pressure switch
T1 ............Ignition transformer
Y1 ............Gas valve
1 ..............Engineers palmtop connection
2 ..............Frame earth
3 ..............Output relay
ROOM THERMOSTAT CONTROL PANEL
The connection of the Smartech receiver unit (A30) is required
for the Alpha heat pump to operate.
Component identification
A23 ..........Alpha outdoor heat pump
A30 ..........Smartech receiver unit
B1 ............Flow sensor
B2 ............DHW sensor
B5 ............Return sensor
B9 ............DHW inlet sensor (optional)
B10 ..........Flue sensor
E3 ............Ignition and detection electrode
M1............Boiler pump
M20..........Fan
M30..........3-way valve motor
R ..............120 Ohm resistor
Low voltage
connections
230 V
connections
B2
S4
1
G
GY
GY
G
Fuse
3.15 AF
230 V
-Vcc
HS
+UB
GND
+Vcc
M20
Bl
W
R
Bk
Br
BrR
BlWBk
1
5
J3
6
1
9
1
X1
X6
X5
7
1
T1
J2
4
1
J1
3
1
Bl
Br
Bk
Bl
Y
Or
Br
X3
4
1
X9
4
1
Bk
Y
Br
X2
1
5
Gy
Gy
G
G
Bl
X4
1
6
Y
Y
R
Bk
Or
Y1
W
P
M30
B1
B5
B10
A23
A30
S5
P
P
R
W
R
W
Or
Or
G/Y
G/Y
B9
R
Or
Y
Bk
Y
W
Bl Y
44
41
25
24
38
48
For testing
only
Bk
Bl
R
Br
2
E3
XF1
X16
X10
R
R
W
W
W
P
P
P
Or
Or
Bl
R
Br
Bk
Y
Br
PWM
GND
FEED
L
N
Br
G/Y
Bl
Y
Bk
Br
M1
Y
R
Br
Br
Bk
Bl
M
D-
D+
3
Or
G/Y
Bk
Bl
Br
G/Y
Br
Bl G/Y
L
N
A
B
1
2
5
6
Bk
Bl
Bl
Y
L
N
Mains Supply
230 V ~ 50 Hz
X3 D-
X3 D+
X2 OT
X2 OT
X1
X1
R
BUS
CLOUD
PWR
BLE
RESET
35
To Next Page