S2 Solar 3 Twin Line Solar Pump Unit With Deaerator Grundfos Upm3 Hybrid 25-70 Circulating Pumps
The unit with 1” (180 mm) solar circulating pump, fully assembled and tested, consists of:
Return
• Flowmeter with flow regulation with filling and draining valves.
• Synchronous solar high efficiency circulating pump with cables.
• Flanged 3-way ball valve with 10 mbar check valve (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (blue ring, range 0°C-120°C).
• Safety unit 6 bar with ø50 mm 0-10 bar pressure gauge with 3/4” Male connection to the expansion vessel. End of drain side: 3/4” F.
Supply
• Flanged ball valve with 10 mbar check valve (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (red ring, range 0°C-120°C).
• Deaerator made of brass provided with manual bleeder.
• Pipe with end connection.
DIMENSION
Centre distance 125 mm. EPP insulation box (Dimensions: 277x425x150 mm).
A special back plate fixes the unit to the insulation box and allows a quick fitting to the wall or to the storage.
PN 10. Constant temperature 120°C; (short time temperature: 160°C for 20 s).
External connections: 22 mm compression, 3/4” Male or 1” Male.
FIELD OF USE - For power up to 50 kW
FILLING THE SYSTEM
1 . Check the connections to the circuit and to the expansion vessel;
2. Make sure both ball valves (A) and (B) are open;
9. Start the circulating pump and check that there are no leaks from the connections;10. After a few minutes of circulation, deaerate the circuit;
11. Adjust the flow rate of the circuit, preferably by acting on the control of the high efficiency synchronous circulating pump, alternatively carry out the
adjustment by acting on the ball valve of the flow meter, until the desired flow rate is read on the indicator;
12. After a few hours of operation, check again the system pressure, the tightness of the connections and repeat deaeration.
