Speck pumpen BADU Eco Touch-pro, Руководство пользователя

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5 Installation
06/2014 VG 766.2000.055 EN 41
5.2 Pipes
5.2.1 Pipe sizing
Suction lines which are too long have significant disadvantages:
y Higher resistance which results in less efficient priming and a higher
risk of cavitation.
y Longer priming time, up to 12 min.
The dimensions which are specified in the pump data sheet apply only
to a pipe length of max. 5 m.
For longer pipes, losses due to pipe friction must be taken into account.
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Size pipes according to the data in the tables. See pump data
sheet.
5.2.2 Laying pipes
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Keep the suction line as short and straight as possible.
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Avoid sudden changes to the cross-section and direction.
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If possible, lay the suction line below the water level.
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Lay the suction line as follows to prevent air pockets from forming:
– For gravity feed: continuously falling.
– For suction operation: continuously rising but below water level.
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If the pump is installed above the water level, install a foot valve in
the suction line. Required for non self-priming pumps,
recommended for self-priming pumps. With it, the suction line
cannot drain when the pump isn't working, and the priming time
stays short, e.g. after cleaning the basket.
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If clogging is possible e.g. with straw or grass, install a filter in the
intake or the suction line.
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Depending on the type of pump and system, install a non-return
valve as necessary.
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Install valves in both the suction and pressure line.
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Avoid valves which close suddenly. Install shock absorber or air
vessel if necessary.
Note: If the suction line leaks, the pump will prime poorly or not at all.
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Ensure the suction line does not leak and make sure that the cover
is screwed on tightly.