FAQ

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VDI Guideline 2035 Part 1 has been in effect since 2005, and VDI Guideline 2035 Part 2 has been in effect since 2009.

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As an installer, you have the choice of ordering Grundfos customer service from your specialist wholesaler or of contacting us directly.

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SQ pumps have integrated dry-running protection that does not require a corresponding level sensor.

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Before installing the underwater cable on the motor, you need to make sure that the cable plug is clean and dry.

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In the case of non-regulated fixed speed pumps, an overflow valve limits rising pressure when closing the radiator thermostat by moving the medium from the flow pipe to the return pipe.

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The pump reacts to changing volume flows in the system by changing the speed.

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Night set-back is activated (if configured to do so) through the feed temperature of the heat generator.

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Setting the motor protection on a submersible pump

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The float switch cable is to be attached to the discharge pipe in such a way that the remaining free cable length ensures a sufficient flow volume.

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