Circuit Diagram - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

7.1.1 CIRCUIT DIAGRAM

FAN
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
Earth
230V
EXTERNAL
Neutral Supply
CONTROLS
Live Supply
OPTION
Live Return
CH TEMPERATURE
CONTROL
*
L L
R
ST10
SPARK
TRANSFORMER
230V~
ST1
6 720 802 047 (2013/05)
† Fan wiring:
Live = purple
Neutral = brown
FLUE
OVERHEAT
STAT
DHW TEMP.
MAINS
SENSOR (NTC)
SUPPLY
Colour sequence †
ST5
N N L
S S
Fuse F1, slow
S11
2.5 A, AC 230 V
WORCESTER 24V CONTROLS
OPTION, PLUG IN POINT
(under blanking cover on fascia)
DIAGNOSTIC
INTERFACE
FLOW TEMP.
SENSOR (NTC)
PUMP
PUMP
EXTERNAL
SUPPLY
FROST STAT
(OPTIONAL)
DHW TEMPERATURE
CONTROL
B
B
4
2
ST4 1
FR FS NP LP
A
F
ST19
ST6
ST8
ST17
EMS BUS contacts
(for FX controls)
ST9
ST18
CODE PLUG
FAULT FINDING AND DIAGNOSIS
FLAME SENSE
ELECTRODE
OVERHEAT
STAT
SPARK
ELECTRODES
DIVERTER
VALVE
FLOW
TURBINE
Wall plate contacts
(for FX controls)
B B
Outside sensor
(FW 100)
Red
Orange
Blue
Yellow
Green
Black
Blue
Blue
Purple
Purple
Orange
Orange
Green
Black
Yellow
Red
Yellow
Yellow
Red
Red
PRE WIRED LINK
6720804530-09.2Wo
55