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29
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
38
FUNCTIONAL FLOW WIRING DIAGRAM
Overheat
thermostat
1
2
br
r
r
bk
y
pk
b
Mains Switch
Flame detection
electrode
DC
Fan
I
g
nition electrod
e
CH return thermistor
(not fitted)
Control thermistor
D
C
G
as valv
e
b
v
b
k
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
th
e
rmi
s
t
or
S
park
g
enerato
r
External switch e.
g
.
room'stat, pro
g
ramme
r
37
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
INSTALLATION