Alpha CD50 - Illustrated Wiring Diagram; Wiring Diagrams

33
9.1 ILLUSTRATED WIRING DIAGRAM
Alpha CD50 - Wiring Diagrams
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 TERMINALS 1 & 2
AND CONNECT 230/240 V SWITCHED LIVE TO
TERMINAL1.
AFROSTTHERMOSTAT I
S INCORPORATED
WITHIN THE MAIN PCB
Gas Valve
G/Y
Gy
Bk
Or
R
W
Pump
Primary
Temperature
Sensor
Transformer
RR
DHW Temperature
Sensor
G
G
Fuse
F2A
Link
Supply
230/240V-50Hz Fused at 3A
2
21
1NL
X6
X9
X8
LN
X16
X7
X1
Main
PCB
FUSE 315 mAT
X11
X12
X4
X5
Br
Bl
29 30 31 32
R
R
Br
Br
Bl
Bk
Bl
G
G
Or
Bl
Or
Primary Pressure
Switch
Br
Br
R
Bl
Bl
R
Pk
Pk P
Gy
Pk
Pk Gy
P
R
R
Bk
Bk
Or
Or
Or
Or
W
W
Bl
Bl
Bk
Bk
Br
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
15
41
37
12
16
42
18
44
19
45
38
13
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
N
A
R
Diverter Valve
H1
H4
H3
H2
Green LED
Yellow LED
Red LED
Red LED
S10 S3 S2 S1
X10
CH SET
DHW SET
CH CAP
MAX CAP
+ +
+
+
S1 CH set jumper
S2 CH timer jumper
S3 DHW temp off
S10 Range fan speed