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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
28
INSTALLATION
X4
X3
X12
X11
X2
X13
X9
X1
X10
X8
X7
X6
gygy bl br
gy
or
bl
br
g
gy
bl
br
gy
bl
br
g
pk
or
y
pk
pk
pk pk
y y
y y
bk r g gy w
123456
r r
r r
r
gor
43
2
3
2
w
2
3
4
or pk y
w w
w
w
987654321
bk r g gy w
g
bk
123456
A
g bk r gy w
bl
br
gy
bl
br
gy
or
bl
br
g
230V
w
1
2
3
4
5
6
7
8
9
11
15
16
17
13
14
12
18
bl
br
w
g
10
1
N
L
Mains
connection
Service
connection
Mode
switch
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
bl - Blue
gy - Green/Yellow
r - Red
w - White
y - Yellow
g - Grey
bk - Black
or - Orange
pk - Pink