MAINTENANCE INSTRUCTIONS
47
SR
TS
Pacq
ma
ce
Tra
EA
M9
M7
M4
M8
M6
M13
M11
M12
M15
M3
M10
ER
4
3
2
1
1
2
3
4
5
8
1
2
3
4
5
6
7
1
2
3
4
5
6
7
2
1
1
2
3
4
5
6
1
2
c
e
m
a
ne
ne
ce
ma
EV
VG
MD
MF
ar
ar
ce
ma
ma
ce
ne
ne
ne
ne
ne
ce
ma
ne
1
2
3
PA
MP
S
e
S
e
T
a
T
a
N
L
VD
ne
ce
ma
SF
TF
SS
C
6.6 Wiring diagrams – DIGITECH
®
TR Printed Circuit Board (MIAH6)
Key:
TRA: Ignition transformer
ER: Ionisation electrode
EA: Ignition electrode
VG: Gas valve
MD: Modulator
C: Circulating pump
PA: Air pressure switch
TS: Safety thermostat
TF: Flue Safety thermostat
SF: Condensate trap
SR: Heating sensor
SS: D.H.W sensor
MF: Flowswitch micro
Pacq: Water pressure switch
EV: Fan
VD: 3-Way diverter valve
MP: Terminal board
SE: Outdoor temperature sensor
TA: Room thermostat
L: Line
N: Neutral
ne: Black
ce: Blue
ma: Brown
ar: Orange