Riello Solar R 11 Handbuch Seite 21

FILLING THE CIRCUIT
Step 1
Turn the knob of the valve (R) fully anti-clockwise.
Close the flow regulator (V) (by turning clockwise with a
6 mm Allen key).
Step 2
Open the manual bleed valve and any vent valves at the
highest point in the system and keep them open through-
out the filling operation.
Step 3
Pump the heat transfer fluid around the circuit with an
external filling pump until all air bubbles have been elimi-
nated. Close the manual bleed valve and any vent valves
opened previously.
Step 4
Temporarily raise the pressure in the system to 4 bar.
Step 5
Start up the system for about 20 minutes.
Step 6
Repeat the air bleed operation from step 2 on until all
residual air is eliminated from the circuit.
Step 7
Set the circuit pressure according to the table on the next
page in order to ensure a minimum pressure of 1.5 bar at
the height of the collector field.
H Pressure at boiler
up to 15 m
15 - 20 m
20 - 25 m
25 - 30 m
General rule: p [bar] = 1.5 + H [m] / 10
Step 8
Close the cocks (A) and (B) and re-open the flow regula-
tor (V) (by turning anticlockwise with a 6 mm Allen key).
H
3 bar
3,5 bar
4 bar
4,5 bar
21
Flusso bloccato Flow stopped
90°
0°
Flusso solo verso l'alto
Upward flow only
(funzione di valvola
(non-return
di non ritorno)
valve function)
Gruppo di
Return
ritorno
group
b
Do not fill the system in bright, sunny conditions or
if the collectors are hot.
b
Use a manual bleed valve, which should be in-
stalled at the highest point in the system, to ensure
that all air bubbles have been eliminated from the
circuit.
R
Pompa
Heat transfer
di carico
fluid filling
fluido
pump
termovettore
A
V
G
B
Miscela antigelo
Anti-freeze mix