28
WIRING DIAGRAMS
ERA 31 S
T
:Line
filter
F
:Anti-interference
filter
IG
Not
used
Power
supply
from
230
Vac
network
F
T
Power supply cable
LN
N
L
Outlet
230
Vac
PI
PB
1
2
Co
TB
Remote
water
heater
PA:
Air
pressure
switch
V:
Fan
EA:
Ignition
electrodes
ER:
Detection
electrode
PLS:
Control
box
reset
pushbutton
SB:
Control
box
lock-out
lamp
Controlboard
Flame
control
box
Potentiometer
and
led
board
O-WINTER-SUMMER
SELECTOR
VG1
JP2
SB
PLS
JP1
EA
EA
JP5
ER
FAILURES
ON
COD.
05254104
SKG-RV
JP6
12
21
TS
11
SC
TA:
Room
thermostat
PI:
Heating
pump
SC:
Boiler
probe
thermostat
connection
VG1:
Gas
solenoid
valve
M5:
Stelvio
4-pins
connector
for
system
pump
and
water
heater
pump
connection
B3:
Heating
pump
control
relay
B2:
Water
heater
pump
control
relay
TB:
Water
heater
thermostat
(by
the
installer)
electrical
panel
power
supply
sectioning
IG:
Magneto-thermal
switch
for
PB:
Heater
pump
(by
the
installer)
F1:
Delayed
3.15
A
fuse
B1:
Burner
control
relay
(single
stage)
M:
PA
35
-7-pins
terminal
board
M6:
Terminal
board
for
earth
connection
M3:
Extractable
terminal
board
for
electrical
panel
power
supply
M2:
Lumberg
connector
for
boiler
probe
and
water
heater
TS:
Water
safety
thermostat
100¡C
(-6¡C)
(by
the
installer)
BURNER LOCK-OUT
JP4
V
~
PA
N
L
4
23
L 1
N
N
L
U
U
3
L
N
4
21
3 X 1
TA
N L
L
N
3
X
0.75
3
X
0.75
M
1
HEATING
POTENTIOMETER
1
2
3
N
1
(1)
1
1
32
N
4
5
6
N
7
L
(1)
PR
A
J1
DL3
REG
A
DL2
N
2
3
5
41
1
A
CN1
M2
1
B1
J1
2
1
M7
M5
B3
B2
M5
M6
F1
3
M3
1
2
LC
N
N
L
DL1
(1)
1
3
42
1
5
1
0