Bosch 12/18 Instruction Manual page 29

230V
1 N L
Mains
connection
Service
connection
1
gy
bl bl
br br
X7
X6
2
2
3 4
r or g
w w
3
r
7
bl
14
br
gy
bl
15
br
gy
or
16
bl
br
g
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
18
M o d e
17
switch
gy gy bl br
X1 X2
gy
or
pk
bl
pk
br
g X9
g
X8
w
pk
or
w
y
X10 X13
3
4
pk pk
5
3 4
2
2
or pk y
r r w w
r
bk r g gy w
8
9
11
1 2 3 4 5 6
1 2 3 4 5 6
12
bk r g gy w
g bk r gy w
1 2 3 4 5 6 7 8 9
13
A
ELECTRICS
Electrical components:
1 Printed circuit board
2 Thermostat - boiler high limit
3 Thermostat - DHW control
4 Thermostat - CH control
5 Indicator lamp - boiler mode
6 Indicator lamp - lock-out
7 Manual reset - overheat thermostat
8 Manual reset - flue overheat thermostat
9 Manual reset - burner lock-out
10 External programmer (not supplied)
11 Burner socket
12 Burner plug
13 Burner control box (12/18 & 18/25 shown)
14 Flow switch
15 Circulating pump
16 Diverter valve
17 Frost stat
18 Frost stat
Wire colour code:
br - Brown
X3
bl - Blue
gy - Green/Yellow
y y
X11
r
gy
w - White
g
bk
bl
y - Yellow
br
g - Grey
w
X12 g
bk - Black
X4
or - Orange
pk - Pink
y y
6
10
- Red
ELECTRICS
28