31
Alpha CD25C/28C/35C - Wiring Diagrams
9.1 ILLUSTRATED WIRING DIAGRAM
9 WIRING DIAGRAMS
Br - Brown
Bk - Black
Bl - Blue
R-Red
Or - Orange
G - Green
G/Y - Green/Yellow
W - White
Gy - Grey
Pk - Pink
P - Purple
NOTE: TO CONNECT EXTERNAL CONTROL
REMOVE LINK FROM TERMINALS1&2
AND CONNECT 230/240 V SWITCHED LIVE TO
TERMINAL1.
A FROST THERMOSTAT IS INCORPORATED
WITHIN THE MAIN PCB
Gas Valve
G/Y
Gy
Bk
Or
R
W
Pump
Primary
Temperature
Sensor
Transformer
RR
DHW Temperature
Sensor
DHW
Flow Switch
G
G
Fuse
F2A
Link
Supply
230/240V-50Hz Fused at 3A
2
21
1NL
X9
S3
S1 S2
X10
X8
LN
X16
X7
X1
Main
PCB
CH SET
DHW SET
FUSE 315 mAT
CH CAP
MAX CAP
X11
X12
X4
H1
Green LED
H4
Yellow LED
H3
Red LED
H2
Red LED
Br
Bl
29 30 31 32
R
R
Br
Br
Bl
Bk
Bl
G
G
Gy
Or
Gy
Or
Primary Pressure
Switch
Br
Br
R
Bl
Bl
R
Pk
Pk P
Gy
Pk
Pk Gy
P
R
R
Bk
Bk
P
W
W
W
Bl
Bk
Br
Or
Or
Fan
Flame
Sensing
Electrode
Flue Limit
Thermostat
Overheat
Thermostat
Or
Bk
Bk
W
R
W
Gy
Spark
Generator
Ignition
Electrodes
40
36
35
11
41
37
12
42
44 45
38
13
X6
18 19
X5
15
16 17
43
39
14
3433 3
55
2
24
49
26
51
25
50
22
47
23
48
2721
46
R
5
4
3
2
1
Br
R
Bl
(Optional) Clock
240 Vac
24 Vac
NO
COM
Diverter
Valve Motor
To Next Page
Loading...
