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6.4
POSITION OF WIRED COMPONENTS
FAN
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
Earth
230V
EXTERNAL
ROOM STAT
Neutral Supply
WHEN USED
Live Supply
WITH DT20
Live Return
CH TEMPERATURE
CONTROL
*
L
R
ST10
SPARK
TRANSFORMER
PRE WIRED LINK
230V~
ST1
i System Diverter Valve kit 6 720 645 222 (2012/09)
† Fan wiring:
Live = purple
Neutral = brown
FLUE
OVERHEAT
STAT
MAINS
SUPPLY
Colour sequence †
ST5
L
N
N
L
S
S
Fuse F1, slow
SI1
2.5 A, AC 230 V
WORCESTER 24V CONTROLS, PLUG IN POINT
OPTIONS: DT20 OR DT20 RF OR DT10 RF
(under blanking cover on fascia)
DIAGNOSTIC
INTERFACE
FLOW TEMP.
SENSOR (NTC)
PUMP
PUMP
EXTERNAL
SUPPLY
FROST STAT
(OPTIONAL)
DHW TEMPERATURE
CONTROL (CYLINDER)
B
B
4
Outside sensor
2
ST4
ST6
1
FR
FS
NP LP
A
F
ST8
ST17
EMS BUS contacts
(for FX controls)
ST9
Fuse F3, slow T 0.5 A
SI2
Fuse F2, slow T1.6 A
SI3
ST18
CODE PLUG
FLAME SENSE
ELECTRODE
OVERHEAT
STAT
SPARK
ELECTRODES
DIVERTER
VALVE
Wall plate contacts
(for FX controls)
B B
TANK STAT
(OPTIONAL)
(FW 100)
Red
Orange
Blue
Yellow
Green
Black
Blue
Blue
Purple
Purple
Orange
Orange
Green
Red
Red
Optional cylinder
temperature
sensor
6720645222-22.4Wo
ELECTRICAL
11
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