3
Diagrams
3.1
Wiring diagram
Wiring diagram for boiler equiped with full sequence ignition device type: ceza
External controls
supply terminal
terminal block
3
2
1
c
n
m
1
m
c
m
n
c
gr n
r r
ON
r
r
r
t
1
DHW temperature
DHW flow
probe NTC
m --- brown
c --- blue
n --- black
Fan
Electrical
block
L
N
M
~
m
g/v c
g/v
c
n
g/v
g/v
g/v
n
c
n
n
r
c
m
c
c
r
b
c
COM
2
b
c
c
t
c
3
CH temperature
switch
probe NTC
pressure switch
b --- white
r --- red
gr--- grey
Air pressure
Safety
switch
thermostat
COM
gr
gr
NO
b
n
g/v
g/v
g/v
c
n
gr
b
b
n
n
1
r c n
n
2
M
~
NO
Primary
Three way
diverter valve
a --- orange
g --- yellow
g/v --- yellow/green
v --- green
Flame detection
ignition
electrode
electrodes
gr
Modulating gas valve
n
gr
n
b
n
g/v
3
g/v
m
c
M
~
Pump
r
n
b
v
Time switch
5