Beretta POWER PLUS Installation Instruction page 37

EMPTYING
Before starting to empty the system, disconnect the
power supply by moving the main system switch to "off".
Emptying the BOILER
- Close the valves (1)
- Connect a plastic hose to the drain cock (4), on each
heating unit, and open the cock
b
Before opening the drain cock (4), protect the electri-
cal devices underneath against water spillage.
Emptying the SYSTEM
- Check that the valves (1), installed on the water circuit,
are open;
- Connect a plastic hose to the drain cock (5), fitted on
the system return line, and open the cock.
1
MI
RI
GAS
1
MI
RI
GAS
5
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