Install Instructions

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4.2 Flushing the storage tank for initial commissioning
1. Connect the pressure hose of a flushing and filling station to the fill ball valve (5).
2. Connect the flushing hose of a flushing and filling station to the fill and drain ball valve at the
lowest point of the solar thermal system.
3. Close the ball valve (4).
4. Open the fill ball valve (5) and the fill and drain ball valve at the lowest point of the solar
thermal system.
5. Flush the solar thermal system by means of the flushing and filling station until the
discharged solar fluid is free of dirt particles.
6. Switch off the filling pump.
7. Close the fill and drain ball valve at the lowest point of the solar thermal system.
8. Remove the flushing hose from the fill and drain ball valve.
9. Close the fill ball valve (5).
10. Connect the flushing hose to the drain ball valve (3).
4.3 Flushing and filling the solar thermal system
1. Disconnect the expansion vessel from the solar thermal system.
2. Connect the pressure hose of a flushing and filling station to the fill ball valve of the flushing
and filling unit (5, see figures 1 and 2).
3. Connect the flushing hose of a flushing and filling station to the drain ball valve of the
flushing and filling unit (3).
4. Close the ball valve in the center of the flushing and filling unit (4).
5. Turn the ball valves (1 and 2) in flow and in return with an open-ended spanner (wrench
width 14) to a 45° position. The check valves in the ball valves are now open.