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A
al polo stella di terra
EA/ER
J7
1
3
T1
J12
SLAVE 1
PC
J5
T3
J10
J17
Main
BUS 1
B
MODULAR SYSTEM
Modular system main switch
IG
Contact for external safeties
CS
Boiler circulator
PB
Zone 1 circulator (high temperature)
PZ1
Zone 2 circulator (low temperature)
PZ2
Mixer valve
VM
Remote control (accessory available separately)
CR
Analogue input
IA
Boiler sensor
SB
Zone 1 sensor
SZ1
Zone 2 sensor
SZ2
Outdoor sensor
SE
Zone 1 room thermostat (high temperature)
TA1
Zone 2 room thermostat (low temperature)
TA2
gv
Terra
J6
gv
Terra
J14
gv
Terra
Fusibile 4A
J8
J15
Fase
m
F1
a
Neutro
Circolatore
m
J2
a
v
m
Valvola gas
g
a
b
Termostato limite
m
m
J1
a
Pressostato Diff.
a
n
m
J11
Soffiante (+)
Input Sens. Hall
Alimentaz. Sens. Hall
Comune Sens. Hall
Soffiante (-)
m
NTC mandata
a
NTC di ritorno
m
1
2
J9
J4
a
NTC fumi
m
a
al polo stella di terra
EA/ER
IG2
J7
1
3
T1
C
VG
J12
TS
PD
SLAVE 2
m
b
v
PC
g
J5
n
T3
SM
J10
SR
J17
SF
Main
HEATING ELEMENT
Heating element circulator (or 2-way valve)
C
Flow probe
SM
Return probe
SR
Exhaust flue probe
SF
Safety thermostat
TS
Gas valve
VG
Water differential pressure switch
PD
Ignition/detection electrode
EA/ER
FIRST...FOURTH heating element switch
IG1..IG4
Addressing microswitches
J10/J17
gv
Terra
J6
gv
Terra
J14
gv
Terra
Fusibile 4A
J8
J15
Fase
m
F1
a
Neutro
Circolatore
m
J2
a
v
m
Valvola gas
g
a
b
Termostato limite
m
m
J1
a
Pressostato Diff.
a
n
m
J11
Soffiante (+)
Input Sens. Hall
Alimentaz. Sens. Hall
Comune Sens. Hall
Soffiante (-)
m
NTC mandata
a
NTC di ritorno
m
1
2
J9
J4
a
NTC fumi
m
a
BUS 2
Bus line with male
connector for possible
connection to another slave card
for an adjacent modular system.
IG
3
C
VG
TS
PD
m
b
v
g
n
SR
SF
13
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