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3.2
Wiring diagram M90D.24SR, M90D.28SR
Wiring diagram for boiler equiped with full sequence ignition device type: Bertelli & Partners FM30
External controls
Electric supply
terminal block
terminal block
3
2
1
bu
gy
rd
Electronic
control p.c.b.
bn = brown
bu = blue
bk = black
wh = white
rd = red
gy = grey
gn = green
ye = yellow
vt = violet
og = orange
gnye = green/yellow
Safety
thermostat
ye
wh
gnye
gnye
bn
bu
bk
bn
bu
rd
bk
t
bk
bu
Primary circuit
C.h. temperature
flow switch
probe NTC
Fan
Air pressure
switch
M
~
NC
ye
wh
og
vt
bk
bu
bn
bu
bn
bk
bu
bn
Full sequence
ignition device
M
~
Pump
Diagrams
Ignition
Flame detection
electrodes
electrode
bn
bu
NO
bk
COM
bk
rd
bk
gy
bk
gnye
bu
gnye
bn
gnye
Modulating
gas valve
7
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