JINYI SR881 - 3.1 Flushing and Filling the Solar System

SR881 operation instruction of solar pump station
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3.1 Flushing and filling the solar system
Flushing and filling steps:
 Disconnect the expansion vessel from the solar thermal system.
 Connect the pressure hose of a flushing and filling station to the fill ball valve A of the
solar pump station
 Connect the flushing hose of a flushing and filling station to the drain ball valve B of the
solar pump station
 Open the filling ball valve and drain ball valve
 Flush the solar thermal system using the flushing and filling station for at least
15minutes to remove all air from the system.
 During the flushing, bleed the solar thermal system several times at the air stopper until
the discharged solar fluid is free of air bubbles.
 Close the drain ball valve of the flushing and filling station, and continues run the filling
pump and increase the system pressure to approx.3-4 bar, system pressure can be
read from the manometer.
 Close the flushing ball valve B of the solar pump station, and then close the filling valve
A， and then stop the flushing and filling station.
 Check the manometer to see whether the system pressure reduces and eliminate leaks
where necessary.
 Reconnect the expansion vessel to the solar thermal system.