Regulus KPG1-ALC, Installation And Operation Manual

22

The below listed procedures are valid when a Regulus 
pump station is used.

10.1 Filling

• in order to 

fi

 ll the system, use a 

fi

 lling device with a 

reservoir for solar liquid and a 

fi

 lling pump (see Fig. 30)

• attach the 

fi

 lling hose to the feed valve and open the 

valve completely

• please use antifreeze solar 

fl

 uid Regulus - Solarten 

super to 

fi

 ll the system

• attach the return hose to the bleed valve and open the 

valve completely

• close the integrated ball valve in the 

fl

 owmeter (the 

groove in the 

fl

 owmeter‘s adjusting screw must be 

horizontal).

• open the check valve (valves - two for a twin-pipe 

solar pump station) above the pump by turning the ball 
valve by 45° (intermediate position between open and 
closed)

• pour suf

fi

 cient quantity of solar 

fl

 uid into the reservoir 

of the 

fi

 lling device, turn on the 

fi

 lling pump and 

fi

 ll the 

solar system.

10.2 Flushing

• 

fl

 ush the solar system for at least 15 minutes using 
the 

fi

 lling device. In order to bleed air and possible 

impurities from the system perfectly, open shortly the 
integrated ball valve of the 

fl

 owmeter from time to time 

(the groove vertically).

10.3 Air bleeding

• with the 

fi

 lling pump running, close the bleed valve and 

increase the pressure up to about 5 bar

• close the feed valve and turn off the 

fi

 lling pump, open 

the regulation screw on the 

fl

 owmeter (groove horizon-

tally), do not disconnect the 

fi

 lling pump hoses!

• set the circulation pump(s) to the highest speed and 

repeat switching on and off to air-bleed the system (an 
air-free pump works almost noiselessly)

• watch the system pressure and when it starts falling, 

increase it by turning on the 

fi

 lling pump and opening 

the feed valve to 5 bar

• repeat air bleeding so long until the 

fl

 oat in the 

fl

 owmeter‘s regulation valve takes a steady position 

during pump operation and bubbles stop appearing in 
the 

fl

 owmeter. After that, let the circulation pump run 

for at least 5 minutes.

• in case an automatic air vent/s is/are used anywhere in 

the solar system, close this valve after air bleeding

  10. SYSTEM FILLING, FLUSHING, LEAK TEST AND AIR BLEEDING

10.4 Leak test

• examine the whole system at 5 bar pressure (all con-

nections, solar collectors, valves etc.), no visible leaks 
are allowed. Leave the system under pressure for at 
least 2 hours, then examine the system once again

• consider the test result successful if no leaks appear 

and/or no noticeable pressure drop appears in the 
system

• set the working pressure by point 8.2 Calculation of 

system working pressure

• set the pump to a suitable speed and set the 

fl

 ow by 

the 

fl

 owmeter and data in Tab. 1

• disconnect the hoses of the 

fi

 lling device and screw 

caps on the feed and bleed valves

• 

open entirely

 the ball valve(s) above the pump

• after several days of operation, air-bleed the system 

again. 

Do not 

fl

 ush the system with water. Since it is impossible 

to empty it completely, a risk of frost damage appears.

Fig. 30: Filling a solar system