25
icos
-
Installation & Servicing
INSTALLATION
Spark generator
nm 8076
bk
b
br
bk
b
bk
r
b
v
b
r
br
b
r
r
b
r
r
r
or
or
or
or
b
pk
pk
y
y
y/g
y/g
Ferrite
y/g
y/g
y/g
y/g
y/g
y/g
bk
bk
Flue
thermistor
Overheat
thermostat
Flow
control
thermistor
Gas valve
ON /OFF
Switch
Service
connection
MAINS
SUPPLY
230V 50Hz
Permanent
black link
Fan
y
y
Chassis
earth y/g
Control PCB
Fused at
3.15ATL
bk
bk
y y
User
control
and
display
br
b
33 FUNCTIONAL FLOW WIRING DIAGRAM
Overheat
thermostat
1
2
br
r
r
bk
y
pk
b
Mains Switch
Flame detection
electrode
DC
Fan
Ignition electrode
CH return thermistor
(not fitted)
Control thermistor
DC Gas valve
b
v
bk
or
or
N
L
Control PCB
User PCB
y/g
r
r
y
b
y
b
nm
7201
br
y/g
br
bk
E
b
Fl
ue
therm
i
stor
Spark
generator
External switch e.g.
room'stat, programmer
32 PICTORIAL WIRING DIAGRAM
LEGEND
b -
blue
bk -
black
br -
brown
gy -
grey
or -
orange
pk -
pink
r
-
red
v -
violet
w -
white
y -
yellow
y/g -
yellow/green
LEGEND
b -
blue
bk -
black
br -
brown
gy -
grey
or -
orange
pk -
pink
r
-
red
v -
violet
w -
white
y -
yellow
y/g -
yellow/green
INST
ALLA
TION
200212-10.pmd
9/5/2005, 8:58 AM
25
