Worcester Gas boiler

ELECTRICAL
6 720 645 222a (2012/05)
14
5.3 POSITION OF WIRED COMPONENTS
Fig. 20 Wired components
FAN
FSFR NP LP
L
N
S
N
L
SLR
ST8
ST9
ST17
ST18
ST5 ST4
ST10
Earth
MAINS
SUPPLY
PUMP
SUPPLY
SPARK
TRANSFORMER
DIVERTER
VALVE
ST1
DIAGNOSTIC
INTERFACE
CODE PLUG
Fuse F1, slow
2.5 A, AC 230 V
Fuse F3, slow T 0.5 A
Fuse F2, slow T1.6 A
ST6
CH TEMPERATURE
CONTROL
Red
Neutral Supply
230V
EXTERNAL
ROOM STAT
WHEN USED
WITH DT20
WORCESTER 24V CONTROLS, PLUG IN POINT
OPTIONS: DT20 OR DT20 RF OR DT10 RF
(under blanking cover on fascia)
Live Supply
Live Return
Neutral
Live
Orange
Blue
Yellow
Green
Black
Colour sequence †
Purple
Purple
Red
Red
Orange
Orange
Colour sequence †
230V/AC
9V 25V
*
PRE WIRED LINK
*
EMS BUS contacts
(for FX controls)
Outside sensor
(FW 100)
B
B
4
2
1
A
F
Wall plate contacts
(for FX controls)
BB
EXTERNAL
FROST STAT
(OPTIONAL)
ST15
Cylinder
temperature
sensor
FLAME SENSE
ELECTRODE
SPARK
ELECTRODES
OVERHEAT
STAT
FLUE
OVERHEAT
STAT
PUMP
Green
DHW TEMPERATURE
CONTROL (CYLINDER)
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
6720645222-22.1Wo
† Fan wiring:
Live = purple
Neutral = brown
FLOW TEMP.
SENSOR (NTC)
SI1
SI2
SI3
Blue
Blue