Riello ALUDOMUS SOLAR KV/200 20 ISC SOLAR Installation And Maintenance Manual page 45

Filling procedure
− Open the non-return valve (8) to facilitate filling.
See the figure to ascertain the correct position for
the dot on the screw.
− Open the manual bleed valves on the system
bleed manifold.
− Use an external filling pump to pump heat tran-
sfer fluid around the circuit between the cocks
(A) and (B), until all bubbles have been elimina-
ted.
− Fill the circuit until pressure gauge (10) shows a
value of 3 bar.
− Start the solar heating circuit pump for a few mi-
nutes to check that no air remains in the circuit.
− Adjust circuit pressure again if necessary.
− Set the non-return valve (8) to automatic fun-
ctioning. See the figure to ascertain the correct
position for the dot on the screw.
− Close the previously opened manual bleed valves
on the system bleed manifold.
− Set a flow rate proportional to the number of so-
lar collectors installed on adjuster screw (11) (2 l/
min. per collector).
9
DO NOT fill the solar heating circuit under sunny
conditions or when the collectors are hot. Risk of
burns from hot fluid inside the collectors!
9
Only open the bleed valve if the temperature of the
fluid in the circuit is below 60°C.
9
Make sure that the collectors are not hot before you
start bleeding the circuit. Always cover the solar col-
lectors before bleeding the circuit, and whenever
possible perform bleeding in the early morning.
DRAINING
Switch the electricity supply OFF at the system's main
switch and at the control panel before starting to empty
the boiler or storage cylinder.
O N
O F F
45
INSTALLER
AUTOMATIC
OPEN
8
A
11
9
B
10