Solar 20075392 Manual Del Usuario página 15

FilliNg THE circuiT
Step 1
Turn the knob of the return valve (R) fully anticlockwise.
Close the flow regulator (V) (so that the screw slot is
horizontal).
Step 2
Open, if necessary, the manual bleed valve at the
highest point in the system and keep it open throughout
the filling operation.
Step 3
Pump the heat transfer fluid around the circuit with an
external filling pump until all air bubbles have been eli-
minated. Close, if it was opened, the manual bleed valve
at the highest point in the system.
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 pressure in the system to 3 bar.
Step 8
Close the cocks (A) and (B) and re-open the flow regu-
lator (V).
b
Do not fill the system in bright, sunny conditions or
if the collectors are hot.
adJusTiNg THE FloW
Correct flow adjustment is essential to proper functio-
ning of the entire system.
The pump is of the modulating type and is controlled by
the solar controller. Refer to the manual supplied with
the solar controller to set the pump flow rate range.
Make sure that the pump's rated flow rate is suitable for
the number of solar collectors connected to the solar
storage cylinder.
Flow stopped
90°
0°
Return
group
15
Upward flow only
(non-return
valve function)
R
Pump
Heat transfer
fluid filling
A
pump
V
B
Anti-freeze mix