Alpha CD18R - 9 WIRING DIAGRAMS; 9.1 ILLUSTRATED WIRING DIAGRAM

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9.1 ILLUSTRATED WIRING DIAGRAM
9 WIRING DIAGRAMS
Alpha CD13R, 18R, 24R - 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 FROMTERMINALS 1 & 2
AND CONNECT 230/240 V SWITCHED LIVE TO
TERMINAL1.
AFROST THERMOSTAT IS INCORPORATED
WITHIN THE MAIN PCB
Gas Valve
G/Y
G/Y
Gy
Bk
Or
R
W
Transformer
Fuse
F2A
Link
Supply
230/240V-50Hz Fused at 3A
21
1 234LNNL
X6
X9
X8
LN
X16
X7
X1
FUSE
315 mAT
X11
X12
X4
Br
Bl
29 30 31 32
Bk
R
Br
Br
Br
W
Gy
Bl
Bl
Bl
Br
Bl
GG
G
G
Or
R
R
Pk
Pk P
Gy
Pk
Pk Gy
P
Or
W
Bl
Bk
Br
Primary Flow
Temperature
Sensor
RR
Primary Return
Temperature
Sensor
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
18
44
19
45
38
13
43
39
14
3433 3
55
2
24
49
26
51
25
50
22
47
23
48
2721
46
240 Vac
24 Vac
Gy
W
5
4
3
2
1
Bl
Bk
Br
(Optional) 2 Channel Clock
External Pump
H1
H4
H3
H2
Green LED
Yellow LED
Red LED
Red LED
Main
PCB
S10 S3 S2 S1
X10
CH SET
DHW SET
CH CAP
MAX CAP
+ +
+
+
S1 CH set jumper
S2CH timer jumper
S3 DHW temp off
S10 Range fan speed