Beretta POWER PLUS Installation Instruction page 15

b
The pumps should be connected by installing suitable contactors with manual emergency operation.
to main earth pole
EA/ER
J7 J8
1 3
T1
J12
SLAVE 1
PC J5
T3
J10
1
J17
Main
PB - DHW pump
PZ1 - Pump in zone 1
(high temperature)
PZ2 - Pump in zone 2
(low temperature)
VM - Mixing valve
CR - Remote control (accessory)
IA - Analogue input
SB - DHW probe
SZ1 - Probe in zone 1
SZ2 - Probe in zone 2 (low temperature)
SE - Outside probe
TA1 - Room thermostat in zone 1
(high temperature)
TA2 - Room thermostat in zone 2
(low temperature)
SYSTEM
gv
Earth
J6
gv Earth
J14
Fuse 4A gv
Earth
J15
Line
m
F1
a
Neutral
m
C
a
J2
v
m
Gas valve
g
a
b
Safety thermostat
m
m
J1
a
Diff. pressure switch
m
n
a
J11
Blower (+)
Hall sensor imput
Hall sensor power
Hall sensor common
Blower (-)
m
Outlet NTC
a
m
Return NTC
2
J9
J4 a
m Flue gas NTC
a
BUS 1
IG1
to main earth pole
EA/ER
T1
VG
TS
PD
SLAVE 2
m
b
v
g
n
SM
SR
SF
VG - Gas valve
TS - Safety thermostat
PD - Water differential pressure switch
SM - Outlet probe
SR - Return probe
SF - Flue gas probe
EA/ER - Ignition/detection electrode
C - Cable for connection to two-way valve
or injection pump (accessories)
IG - Main boiler switch
IG1 - FIRST heating unit switch
IG2 - SECOND heating unit switch
J10/J17 - Microswitches for setting the address
(see page 54)
HEATING UNIT
parte 2
Earth
gv
J6
Line
m
a
Neutral
J2
1 2
J9
BUS 2
IG2
15