Note
In the following, the filling and flushing process will be described using a
filling and flushing unit (see chap. „Accessories and spare parts" Pagina
19). If the system has no filling and flushing unit, use the filling valve
and the drain valve of the system instead.
Note
Do not put the solar pump into operation during the flushing and filling
process.
Note
For optimum stability, use the filling and flushing station on plane surfaces
only.
1.
Disconnect the expansion vessel from the solar thermal system.
2.
Connect the pressure hose of the filling and flushing
station to the filling valve (5) of the filling and flushing
unit.
3.
Connect the flushing hose of the filling and flushing
station to the drain valve (3) of the filling and flushing
unit.
4.
Close the ball valve in the middle of the filling and
flushing unit.
5.
Open the non-return-valves in the flow (1) and the
return (2).
6.
Open the filling valve (5) and the drain valve (3).
7.
Switch on the filling pump.
8.
Flush the solar thermal system for at least 15 minu-
tes by means of the filling and flushing station until
the discharged solar fluid is free of gas bubbles and
dirt particles.
9.
During flushing, bleed the solar thermal system sev-
eral times until the discharged solar fluid is free of
air bubbles
10. Close the drain valve (3) of the filling and flushing
11. Increase the system pressure. The system pressure
12. Close the filling valve (5).
Flushing hose
13. Switch off the filling pump.
14. Check the manometer to see whether the system
2.
15. Reconnect the expansion vessel to the solar thermal
Pressure hose
16. Open the filling valve (5) and switch on the filling pump.
17. Set the operating pressure of the solar thermal system (approx. 0.5 bar higher
3.
18. Switch off the filling pump.
19. Close the filling valve (5) and open the ball valve (4).
20. Slowly discharge the heat transfer fluid by means of the drain valve (3) until
ON
21. Remove the hoses of the filling and flushing station and screw the caps onto
22. Empty the contents of the hoses into the tank of the filling and flushing station
23. Close the ball valves.
24. Put the non-return valves in flow and return in operating position.
6.
25. Manually start the solar thermal pump at maximum speed (see controller
unit while the filling pump is running.
can be read from the manometer.
pressure decreases (approx. 15 minutes) and elimi-
nate leaks where necessary.
system.
than the inlet pressure of the expansion vessel or the value recommended by
the manufacturer).
the operating pressure (see above) is set.
the fill and drain valves of the station.
by carefully loosening the union nuts.
manual) and let the fluid circulate for at least 15 minutes.
7.
9.
OFF
17