Filling And Draining The System - Riello KV/200 20 ISC Solar Installation And Maintenance Manual

FILLING AND DRAINING THE SYSTEM

RESIDENCE COLONNA CONDENS boilers incorporate
a CH system fill cock.
b
Make sure that the system filling cock (2) is closed
before you start to fill or drain the system.
FILLING THE STORAGE CYLINDER
- Make sure that the central heating circuit and storage
cylinder drain cocks (4) and (3) are 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 CH system fill cock (4) is closed.
- Slacken off the cap of the automatic vent valve (1) to let
air out of the system.
- Slacken off the cap of the manual bleed valve (5). Close
the valve again as soon as water starts to come out.
- Open the CH system fill cock (2) 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 (2). Tighten down the cap
on the manual vent valve (5).
b
Bleed the central heating circuit thoroughly to
ensure that no air remains in it (see page 47).
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.
32
INSTALLER
1
2
3
2
1 3
0 4
bar
7
5
4