Worcester 27i System Compact User Manual

FAULT FINDING AND DIAGNOSIS
Greenstar i System Compact - 6 720 807 726 (2013/05)54
7 FAULT FINDING AND DIAGNOSIS
7.1 INTERNAL WIRING DIAGRAM
113
113
113
EMS
230V
IN
230V
OUT
FR FS
LR
LR
LN
L
N
LN
LN
LN
PUMP SUPPLY
FLAME SENSE
ELECTRODE
SPARK
ELECTRODES
FLOW
NTC
MAX SAFETY NTC
FLUE
STAT
DIVERTER
VALVE PLUG
(NOT USED)
RETURN
NTC
FAN
FLAME SENSE
GROUND
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
PUMP CONTROL
PUMP
Purple
White
Black
Fan wiring:
Live = Brown
Neutral = Blue
Fuse, slow
EMS BUS point
HCM (at rear of PCB)
Worcester 24V controls point
F 5A H 230 V
X7 X6 X5 X3 X11 X4 X12
DIAGNOSTIC
INPUT
DHW TEMPERATURE
CONTROL
CH TEMPERATURE
CONTROL
LCD DISPLAY
Red
Blue
Red
Blue
Orange
Blue
Brown
Black
Green
Orange
Red
G/Y
G/Y
G/Y
6720646609-04.3Wo
PRE WIRED LINK
Red
Orange
White
Yellow
Blue
Brown
Red
Blue
Orange
SPARK
GENERATOR
LN
X2
X16
White White
Black
Blue
Green
Purple
Black
White
Red
Blue
Green
Black
White

Worcester 27i System Compact Specifications

General

Brand	Worcester
Model	27i System Compact
Category	Boiler
Language	English