Worcester 12/18 User Manual

ELECTRICAL SCHEMATIC
LN
N
C1
BOILER MODE
INDICATOR
X9 (PIN 2)
N
X1 (PIN 1)
FROST THERMOSTATS
PROGRAMMER
FUSE F1
3.15A
FAST
CERAMIC
X2
(FS)
X2 (FR)
X2 (FR)
X4 (PIN 3)
X4 (PIN 1)
white
brown
grey
X4 (PIN 2)
X2
(LS)
X2
(NS)
N
LINK
(REMOVE)
4
1
2
3
X2
(LR)
N
RELAY 1
ROOM
THERMOSTAT
DIVERTER
END SWITCH
X8 (PIN 5)
orange
X8 (PIN 2)
grey
1
4
3
N
RELAY 2
4
3
1
N
RELAY
3
X10 (PIN 3) X10 (PIN 1)
whitewhite
1
2
4
N
RELAY
4
X6 (PIN 2) X6 (PIN 4)
bluebrown
DHW CONTROL
THERMOSTAT
WATER FLOW
SWITCH
LOCKOUT
INDICATOR
X11 (PIN 2)
PUMP
X7 (PIN 1)
brown
MOTORISED
DIVERTER
VALVE
X8 (PIN 3)
brown
grey
X12 (PIN 4)
grey
BURNER
X13 (PIN 1)
yellow
pink
X13 (PIN 3)
X13 (PIN 2)
orange
2
4
(C)
2
4
(C)
grey
X13 (PIN 5)
red
red
PLUG IN
CONNECTOR
CENTRAL HEATING
CONTROL THERMOSTAT
AUTO RESET HIGH LIMIT
THERMOSTAT
MANUAL RESET BOILER
OVERHEAT THERMOSTAT
X3 (PIN 3)
X8 (PIN 1)
LIVE SUPPLY FOR ALTERNATIVE DIVERTER VALVE
CH
DHW
32
MANUAL RESET FLUE
OVERHEAT THERMOSTAT
red
NCNO
3
NC
orange
NO
3
red
2
6
LOCKOUT
RESET SWITCH
X3 (PIN 3 (L))
white
white
X9 (PIN 1)
X1 (PIN 3)
N
4
X11 (PIN 3)
X12 (PIN 3)
X7 (PIN 3)
brown
N
X7 (PIN 4)
N
X8 (PIN 4)
X8 (PIN 6)
X1 (PIN 5)
X1 (PIN 6)
MODE
SWITCH
SERVICE
CONNECTION
MAINS
CONNECTION
R1
R2
C2
MANUAL
RESET TANK
OVERHEAT
THERMOSTAT
brown
ELECTRICAL SCHEMATIC
53
FAULT FINDING
& DIAGRAMS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32 8 716 106 389c (01/2009)
8 716 113 389d 30/3/10 14:01 Page 53

Worcester 12/18 Specifications

General

Brand	Worcester
Model	12/18
Category	Boiler
Language	English