INSTALLER
31
FILLING AND DRAINING THE SYSTEM
RESIDENCE COLONNA CONDENS
boilers incorporate
a CH system fill cock.
b
Make sure that the system filling cock (3) is closed
before you start to fill or drain the system.
FILLING THE STORAGE CYLINDER
- Make sure that the storage cylinder drain cock (4) is
closed.
- Open a DHW user tap.
- Open the DHW circuit shut-off cocks and slowly fill the
storage cylinder until clean, air-free water flows out from
the taps in a uniform manner.
FILLING THE CENTRAL HEATING SYSTEM
- Make sure that the delivery group drain cock (5) and
boiler drain cock (6) are closed.
- Slacken off the cap of the automatic vent valves (1) and
(2) to let air out of the system.
- Open the CH system fill cock (3) and slowly fill the
system until the pressure gauge (7) reads out a value
between
1 and 1.2 bar
.
- Close the CH system fill cock (3).
b
Bleed the central heating circuit thoroughly to
ensure that no air remains in it (see page 45).
b
The drain points on the solar circuit safety valves
must also be connected to a suitable collection and
drain system.
b
The manufacturer declines all responsibility for
damage caused by water escaping from the safety
valves.
3
1
2
6
4
5
0
bar
4
1
3
2
°C
0
120
20
100
40
80
60
7
