Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
53
7.2
Flushing the solar circuit with solar fluid
Flushing is performed from the solar pump unit to the
cylinder via the collector.
>
Connect the pressure hose of the filling pump (
19
) to the
upper combined filling and draining tap (
1
) of the solar
circuit.
>
Connect the return hose (
17
) to the lower combined fil-
ling and draining tap (
16
) of the solar circuit.
>
Close the 3-way ball valve (
15
).
>
Open the air vent (
4
).
>
Switch the filling pump on.
>
Place enough solar fluid into the container (
10
) to ensure
that the filling pump cannot run dry.
>
Allow the system to pump the solar fluid out of the con-
tainer via the combined filling and draining tap (
1
) until
solar fluid runs back out of the return hose (
17
) and into
the container (
10
).
>
Allow the solar fluid to circulate in the circuit for at least
15 minutes to flush the solar circuit and filter the solar
fluid.
7.3
Filling the solar circuit with solar fluid
>
First, carry out a pressure test and flush the system with
Vaillant solar fluid (ready mixed).
>
Connect the pressure hose of the filling pump (
19
) to the
upper combined filling and draining tap (
1
) of the solar
circuit.
>
Connect the return hose (
17
) to the lower combined fil-
ling and draining tap (
16
) of the solar circuit.
>
Completely open the combined filling and draining taps
(
1
) and (
16
) on the solar pump unit to ensure a maximum
flow rate.
>
Open the ball valve (
8
) on the solar pump unit.
>
Close the 3-way ball valve (
15
) on the solar pump unit.
>
Switch the filling pump on.
>
Place enough solar fluid into the container (
10
) to ensure
that the filling pump cannot run dry.
>
Check to see whether the solar fluid is running out of the
return hose (
17
) and back into the container (
10
).
>
Allow the filling pump to run for at least 15 minutes to
sufficiently vent the solar circuit.
The vent operation was successful if the fluid in
the solar fluid container is clear and no more bubbles
rise to the surface.
>
Use the screw cap opening on the solar fluid container to
carry out the visual check.
>
Set the 3-way ball valve (
15
) on the solar pump unit to
45° (non-return valve out of operation).
>
Allow the filling pump to run for a further 5 minutes to
vent the pipeline between the combined filling and drai-
ning taps (
1
) and (
16
).
>
After 5 minutes, close the 3-way ball valve (
15
) again
(horizontal position).
>
Close the combined filling and draining taps (
1
) and (
16
)
and then immediately switch off the filling pump.
>
Place the 3-way ball valve (
15
) into the vertical position
again (flow and non-return valve working).
>
Remove the pressure hose and return hose of the solar
circuit combined filling and draining taps.
The system is now filled and vented.
Commissioning 7
