14
en
Note
Depending on the system size, the radiators can either be opened and
closed separately or all at once.
Î
Connect the pressure hose of the flushing and filling station to the filling valve
of the system.
Î
Connect the flushing hose of the flushing and filling station to the drain valve
of the system.
Î
Open the filling valve and drain valve of the system.
Î
Switch on the filling pump.
Î
Flush the system by means of the filling and flushing station until the discharged
solar fluid is free of gas bubbles and dirt particles.
Î
Switch off the filling pump.
Î
Close the filling valve and drain valve of the system.
Î
Disconnect the pressure hose and the flushing hose.
4.3
Cleaning the dirt filter
The dirt filter at the pump inlet must be checked for grit at regular intervals. In
order to remove and clean the dirt filter, proceed as follows:
Î
Drain and open the tank.
The dirt filter is clearly visible at the bottom of the tank.
Î
Unscrew and remove the dirt filter.
Î
Clean the dirt filter thoroughly under running water.
Î
If necessary, remove dirt particles from the bottom of the tank with a soft cloth.
Î
Reinstall the dirt filter.
dirt filter
Note
Make sure the fluid is always above the MIN mark in order to prevent
air intake.
Î
Open the filling valve (3) and switch on the filling pump.
Î
Set the operating pressure of the solar thermal system.
Î
Switch off the filling pump.
Î
Close the filling valve (3) and open the ball valve (4).
Î
Slowly discharge the heat transfer fluid by means of the drain valve (5) until the
operating pressure (see above) is set.
Î
Put the non-return valves in flow and return in operating position.
Î
Manually start the solar thermal pump at maximum speed (see controller man-
ual) and let the fluid circulate for at least 15 minutes.
Î
Bleed the solar thermal system several times until the discharged fluid is free
of gas bubbles.
Î
Adjust the operating pressure of the system, if necessary.
Î
Remove the hoses of the filling and flushing station and screw the caps onto the
fill and drain valves.
Î
Empty the contents of the hoses into the tank of the filling and flushing station
by unscrewing the union nut carefully.
Î
Check the antifreeze ratio.
11.
%
Î
Drain the tank of the filling and flushing station.
GL
YCOL
4.2
Flushing heating systems
Note
Set the operating pressure of the system.
Note
Do not put the heating pump into operation during the flushing process.
