Beretta POWER PLUS Installation Instruction page 34

- Identify the terminal block (5) and make the connec-
tions, as in the diagram shown below..
TERMINAL BLOCK INSIDE THE MASTER CONTROL PANEL
28
27
26
25
24
23
22
21
20
19
18
34
(*)
230V~50Hz
b
The following measures are compulsory:
1 - the use of an omnipolar thermal overload
switch, mains disconnecting switch, com-
pliant with the CEI-EN standards (minimum
contact opening 3 mm);
2 - respect the connection L (Line) - N (Neutral).
Leave the earth wire around 2 cm longer than
the power wires;
3 - use wires with a cross-section greater than or
equal to 1.5 mm2, complete with pointed end
terminals;
4 - refer to the wiring diagrams in this booklet for
any operations on the electrical system;
5 - connect the appliance to an effective earth
system.
PB (*)
DHW pump
PZ1 (*)
High Temperature
system pump
PZ2 (*)
Loop pump or
Pbas (*)
Low temperature
system pump
VM (*)
Mixing valve
Contact for
alarm signal
CR
Remote
control
IA
0-10V
analogue
input
17 16 15 14 13 12 11 10
Probe in zone 1,
high temperature
Storage heater probe
Probe in zone 2,
low temperature
Outside probe
TA2 TA1
Low temperature High temperature
room thermostat room thermostat
9
b
The pumps should be connected by instal-
ling suitable contactors with manual emer-
gency operation.
a
The gas and/or water pipes must not be
used to earth the appliance.
a
The power supply and room thermostat
cables must not run near hot surfaces
(outlet pipes).
The manufacturer is not liable for any dama-
ge due to the failure to earth the appliance
and to observe the information provided on
the wiring diagrams.
1
SZ1
2
3
SB
4
5
SZ2
6
7
SE
8