Emptying The Primary Circuit - Biasi Activ A 12OV Service Manual

General access and emptying hydraulic circuits
Fig. 2.9
2.5

Emptying the primary circuit

1 Close the c.h. circuit flow and return cocks.
2 Remove the front and right panels of the boiler.
Open the drain tap F (Fig. 2.10) until the boiler is
3
completely emptied.
Fig. 2.10
4
CLOSED
OPEN
4 To help the draining of the primary circuit loose
the condensing heat exchanger air purger valve
G (Fig. 2.11)
Fig. 2.11
Attention: some water could remain in the condens-
ing heat exchanger.
5 Close drain tap once the emptying has been
completed.
F
G