INSTALLER
37
FILLING AND DRAINING THE SYSTEM
DRAINING
Switch the electricity supply OFF at the system's main
switch and at the control panel before starting to empty
the boiler.
- Close the shut-off cocks for the central heating circuit
- Connect a hose to the hose union on the drain cock
(1) and open the cock.
RI
1
TAU UNIT
boilers require a filling pipe connected to the
central heating circuit return pipe.
b
All the necessary circuit shut-off and drain
cocks must be provided.
FILLING THE SYSTEM
Make sure that the boiler’s central heating drain cock (1)
is closed before you start filling the system.
- Open the shut-off cocks for the water circuit
- Slowly fill until the pressure gauge reads, when cold, a
value of 1.5 bar
- Close the central heating circuit shut-off cocks.
PREPARING FOR INITIAL START-UP
RI
1
- Check that the water and fuel shut-off cocks are open
- Check that the water pressure gauge shows a pres-
sure
over 1 bar
with the system cold. Check also that
the water circuit is properly de-aerated
- Check that the expansion vessel is correctly pre-charged
- Check that the electrical connections have been made
correctly
- Check that the vent and air intake pipes have been
correctly installed and connected.
b
If you need to convert the boiler from METHANE to
LPG, contact
r
's Technical Assistance Service.
It is essential to perform the following checks before starting up or testing the functioning of the boiler.
