Features and technical data
Installation, use and maintenance manual – Caldaia 55.1 and 100.2 Tech
15
1
1.5
ELECTRICAL WIRING DIAGRAM
Figure 1.11
55.1 boiler electrical connections diagram
ER
Flame detector
EA
Ignition electrode
CRE
Modulating circulator
VG
Gas valve
Tra
Ignition transformer
TF
Flue gas thermofuse
TS
Safety thermostat
Pacq
Water pressure switch
SR
Heating delivery probe
EV
Blower
MP
Standby contact
SE
Connector for optional outdoor tempera-
ture probe
TA
Connector for optional room thermostat
SRi
Heating return probe
SPM
Male plug
INAIL
INAIL safety appliances
PRM
Minimum pressure switch
PB
Maximum pressure switch
TB
Lock thermostat
L
Line
N
Neutral
ne
Black
ce
Light blue
ma
Brown
ar
Orange
gi
Yellow
bi
White
gr
Grey
11
10
9
8
7
12
13
14
15
16
17
M12
M9
M7
M5
M2
M4
M8
M10
M15
M16
1
2
3
4
57
61
60
59
58
44 43 42 41 40 39 38
37
36 35 34 33 32
31 30 29 28
26 27
EV
EA
VG
Tra
ER
TS
TF
SR
Pacq
1
C
1
C
PB
p>
t>
TB
p<
PRM
C
1
N
T
L
S3
B4
T2
T1
N
L
T
S3
B3
T2
T1
SPM
SE
TA
ce
ma
ce
ma
ne
ne
ce
ma
ma
ce
ar
ar
ma ce
GND
PWM
HS
+24V
ce
ma
ce
ma
220 V
50 Hz
L
N
MP
ma
ce
SRi
gi/ne
ne
ma
ce
ma gi
bi
gr
68
67
62
64
65
66
63
CRE
INAIL