Beretta POWER GREEN 50 Manual De Uso E Instalación página 26

A If you wish to connect a second circulator externally, the connection must be made in the M2 terminal board, as shown in the figure.
The ambient thermostat must be inserted as shown in the diagram, after removing the clevis from the M6 terminal board.
The contacts of the ambient thermostat must be sized for V= 230 Volt.
B The heating hourly timer and the ambient thermostat must be inserted as shown in the diagram.
The contacts of the ambient thermostat and hourly timer must be sized for V=230 Volt.
C Low voltage services must be connected (as shown in the figure) on the M10 terminal board, which is pre-arranged for this purpose.
T.S.B.T.= low temperature safety thermostat
S.E.= external probe
REC= remote control panel
S.BOLL = storage tank probe
T.BOLL = storage tank thermostat
D The heating hourly timer must be inserted as shown in the diagram.
The contacts of the hourly timer must be sized for V= 230 Volt.
If you wish to connect a 3-way electric valve externally, the connection must be made on the M6 terminal board, as shown in
the figure.
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A
C
E
B
D