RM Solar S Class 20 Manual de Instruções descarregar pdf (Página 53)

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8. The double pump station

The double pump station ensures a continuous circulation of the glycol inside the closed solar loop

when useful energy is available in the solar panels. The double pump station recommended by

RM Solar is constructed so as to be unaffected by the operating temperatures of the loop for many

years.

8.1 Technical data:

Maximum working excess pressure: 6 bar

Safety valve: 6 bar

Circulation pump: Solar Circulating Pump

Nominal voltage: AC 230 V

Power consumption: Speed 1 45 W

Speed 2 65 W

Speed 3 90 W

Maximum pump head: 6 m

Maximum pump capacity: 4,5 Ltr/Min

8.2 The double pump station must always be mounted at a level that is lower than the

panels so that no steam may penetrate the expansion vessel in case of stagnation.

Stagnation occurs when the solar panels have heat energy which is not needed

by the system and the panels stagnate at around 180° Celsius. If the expansion

vessel is mounted at the same level or at a higher lever than the panels, an

anti-gravity loop must be installed.

8.3 The double pump station is supplied with the two temperature gauges (ow pipe and

return pipe) with pre-tted ow gauge. On the return pipe is a pre-tted the safety

pressure relieve valve with tapping (RP 3/4’’), a pressure guage and a G 3/4”

connection for the expansion vessel.

8.4 Never ush the solar system with water.

8.5 The double pump station is not suitable for direct contact with swimming pool water.

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RM Solar S Class 20 Manual de Instruções Página 53