• Disconnecttheexpansionvesselfromthesolar
thermal system.
• ConnectthepressurehoseoftheSBS1000tothell
valve(5)oftheushingandllingunit.
• ConnecttheushinghoseoftheSBS1000tothedrain
valve(3)oftheushingandllingunit.
• Closetheballvalve(4)inthecentreoftheushingand
filling unit
• Turntheballvalvesinow(1)andinreturn(2)withan
open-ended spanner to a 45° position.The non-return
valves in the ball valves are now open.
• Openthellanddrainvalves(3and5).
• OpentheballvalvesoftheSBS1000.
• Flushthesolarthermalsystemusingtheushingand
filling station for at least 15 until the discharged heat
transfer fluid is free of dirt particles and air bubbles.
• Duringushing,bleedthesolarthermalsystemseveral
timesattheAirStopp(6)untilthedischargedheat
transfer fluid is free of air bubbles.
• Closethedrainvalve(3)oftheushingandllingunit
with the filling pump running and increase the system
pressure to approx. 5 bar.The system pressure can be
read from the manometer
• Closethellvalve(5)andswitchoffthepumpofthe
flushing and filling station.
• Checkthemanometertoseewhetherthesystem
pressure reduces and eliminate leaks where necessary.
• Reconnecttheexpansionvesseltotheothercompo-
nents of the solar thermal system.
3
4
5
12
Example: pump station RESOL FlowConC
6
3.2 Flushing and filling the solar thermal
system
• Openthellvalve(5)andswitchonthellingpump.
• Settheoperatingpressureofthesolarthermalsystem
(approx. 0.5 bar higher than the inlet pressure of the
expansion vessel or the indications made by the manu-
facturer).
• Switchoffthellingpump,closethellvalve(5)and
opentheballvalve(4).
• Slowlydischargetheheattransferuidbymeansofthe
drainvalve(3)untiltheoperatingpressure(seeabove)
is set.
• ClosetheballvalvesoftheSBS1000.
• RemovethehosesfromtheSBS1000andscrewthe
caps onto the fill and drain valves
• Empty the contents of the hoses into the tank of
the SBS 1000 by opening the ball valves carefully.
Closetheballvalves.
• Putthenon-returnvalvesinowandreturninopera-
ting position by opening the ball valves with an open-
ended spanner
• Manuallyputthesolarthermalpumpinoperationat
thehighestRPMlevel(seecontrollermanual)andlet
it circulate for at least 15 minutes.
• Duringushing,bleedthesolarthermalsystemseveral
times at the AirStopp,until the discharged heat transfer
fluid is free of air bubbles and increase, if required, the
system pressure to the operating pressure.
