MAINTENANCE INSTRUCTIONS
33
M7
M5
M9
M2
b
la
c
k
b
la
c
k
o
ra
n
g
e
M1
M10
o
ra
n
g
e
b
ro
wn
o
ra
n
g
e
o
ra
n
g
e
VG
b
ro
wn
b
lu
e
b
ro
wn
b
lu
e
red
b
lu
e
b
ro
wn
brown
blue
b
lu
e
b
ro
wn
w
h
it
e-
b
lac
k
b
la
c
k
b
ro
wn
b
lu
e
o
ra
n
g
e
PRINTED CIRCUIT BOARD DIGITECH - SM20019
COD. 76677LA
b
lu
e
Key
IG: Main Switch
PA: Air Pressure switch
TS: Safety thermostat
SR: Heating sensor
EV: Fan
ER: Ionisation electrode
EA: Ignition electrode
TRA: Ignition transformer
C: Circulating pump
PACQ:
Water pressure switch
VG: Gas valve
6.5 Wiring diagrams
