Filling And Emptying The System - Beretta Novella MAXIMA 129 N RAI Installation Manual

3.8
Filling and emptying the sys-
tem
Novella MAXIMA boilers require a filling pipe
connected to the central heating circuit return
pipe.
a
It is forbidden to fill or top up the central
heating circuit while the boiler is func-
tioning. Doing so may cause serious
damage to the boiler.
FILLING
- Make sure that the boiler's drain cock (1) is
closed before you start filling the system.
26
- Open the central heating circuit shut-off
cocks and slowly fill the system until the
pressure gauge reads out a value of 1.5 bar
(cold).
- Close the water shut-off cocks.
DRAINING
Before draining the boiler:
- Switch the electricity supply OFF (0) at
the mains power switch and at the control
panel.
- Close the CH circuit water shut-off cocks.
- Connect a hose to the hose union on the
drain cock (1) and open the cock.
1
1
RI
Fig. 3.25
Fig. 3.26
Fig. 3.27
Fig. 3.28
Fig. 3.29