GENERAL
16
12
34
5
12
34
12
34
5
black
blue
orange
yellow/green
blue
brown
white
white
yellow/green
brown
CH
N
DHW
brown
blue
blue
brown
pink
CN5
CN2
X4
X9
X2
JP
4
CN3
CN1
P1
P3
P2
OPE
OPE
FA
2
CONTRO
L CARD
FA
1
SC
ER
EA
TA
C
TLS
TLA
TB
T
AP
C
SM
PA
CI
M5
M3
F1
F2
M3
a
M4
TA
N
N
L
L
F
VD
VG
brown
brown
black
blue brown
black
blue
blue
VH
v
12
34
1
4 3 2 1
8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7
23
12
34
5
6
X1
6
Power supply
230
VA
C
red
pink
red
blac
k
white
white
orange
orange
blac
k
bianc
o
VLv
blue
blue
blue
black
black
grey
red
red
SR
CR
SE
SB
SF
PO
white
purpl
e
brown
WIRING DIAGRAM
APC
Condensate
pump
alar
m
CR
Remote
contr
ol
CN1-CN5
Mains
voltage
connections
EA
Ignition
electr
ode
ER
Flame
detection
electr
ode
F
Fuse
3.15A
F
(fast)
F1-F2
Fuse
3.15A
T
(timed)
JP4
Boiler
configuration
selection
jumper
(in
position
3)
M3-M5
Room
timer
-ther
mostat
connection
ter
minals
M3a-M4
Outdoor
temperatur
e
sensor/condensate
pump/low
temperatur
e
ther
mostat/
remote contr
ol connection ter
minals
OPE
Gas
valve
operator
Cl
Central
heating/storage
cylinder
pump
PA
W
ater
pr
essur
e
switch
P1
DHW
temperatur
e
setting
potentiometer
P2
CH
temperatur
e
setting
potentiometer
P3
Function
selector
R9
Maximum
fan
speed
trimmer
R10
Minimum
fan
speed
trimmer
R14
Bur
ner
ignition
slow
fan
trimmer
R19
Maximum
CH
fan
speed
trimmer
R35
Temperatur
e
contr
ol
curve
selection
trimmer
SC
Condensate
sensor
SE
Outdoor
temperatur
e
sensor
SM
Primar
y
cir
cuit
flow
temperatur
e
sensor
SR
Primar
y
cir
cuit
r
etur
n
temperatur
e
sensor
SW1
Chimney
sweep
TAC
Ignition
transfor
mer
TR2
Main
transfor
mer
TBT
Low
temperatur
e
ther
mostat
TLA
W
ater
over
temperatur
e
thr
eshold ther
mostat
TLS
Heat
exchanger
thr
eshold
ther
mostat
VHv
Fan
power
supply
230V
VLv
Fan contr
ol signal
VG
Gas valve
X2÷X16
Low
voltage
connections
VD
3-way
valve
servomotor
SB
Storage
cylinder
temperatur
e
sensor
SF
Flue
gas
temperatur
e
sensor
PO
DHW
timer
-pr
ogrammer
(accessor
y)
