Wiring Diagrams - Alpha HE25 Installation And Servicing Instructions

9

WIRING DIAGRAMS

9.1 HE25 and HE33 ILLUSTRATED WIRING DIAGRAM
(Optional) Clock
R
R
Br
Bl
230/240V-50Hz Fused at 3A
Fuse
F2A
Relay PCB
M15 M16
51 50 49 54 53 52
Br
P
W
W R
Or Bk
M2
W
Bk
R
Diverter
Valve Motor
LD1
LD2
JP3
Or Or
COM
NO
Primary Pressure
Switch
Br - Brown
Bk - Black
Bl - Blue
R - Red
Or - Orange
P - Purple
G - Green
G/Y - Green/Yellow
W - White
Gy - Grey
5
4
3
2
1
Supply
Link
L N 1 2
G/Y
Br
Bl
R
Br
Bk
R Bl
5 4
43 44 45 N
32 31 30 29
M1
Br
Bl
T1
M13
M12 35 36 37 40
M14
JP2
46 47 48
Or
W
P
Gy
Gy
3
1
Air Pressure
Switch
G/Y
Pump
Bl
Br
G/Y
M10
Br
Bl
Main
PCB
DHW SET
IGN CAP
P3
P1 P2
P4
CH CAP
M4 M5 M6
12 13 14 15 16 17 41 42 18 19 20 21
Or Gy Gy G
Or Gy Gy G
DHW Flow Switch
NOTE:
Alpha HE25 and HE33 - Wiring Diagrams
Fan
Flame
Sensing
Electrode
L
Br
Bl
N
G/Y
Condensate
Level
Sensor
Br
T2
CH SET
25 W
24 W
MET 23 Br
22 Bl
M7
JP1
LPG
Bk Bk
Bk Bk
Gas Valve
Bk Bk
Primary Temperature
Sensor
G G
DHW Temperature Sensor
TO CONNECT EXTERNAL CONTROL
REMOVE LINK FROM TERMINALS 1 & 2
AND CONNECT 230/240 V SWITCHED LIVE TO
TERMINAL1.
A FROST THERMOSTAT IS INCORPORATED
WITHIN THE MAIN PCB
Ignition
Electrodes
Br
Br
Br
W
W
Flue Limit
Thermostat
W
Overheat
Thermostat
Bk
Bk
31