Diehl Hydrus - Installation Procedures

The HYDRUS operates in water temperatures between 34 °F
and 122 °F.
6.1 Installing the HYDRUS
Installation location
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Maintain sucient distance between the HYDRUS and possible
sources of electromagnetic interference (switches, electric motors,
uorescent lamps, etc.).

Calming sections upstream and downstream of the HYDRUS are not
necessary.

Avoid a mounting position where air bubbles may accumulate in the
HYDRUS.
Preparations
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If the water is dirty, install a dirt trap in the feed line upstream of
the HYDRUS.

Flush the pipes thoroughly before installing the HYDRUS.
Mounting
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Close the shuto valves upstream and downstream of the water me-
ter or spacer and release the pressure in the pipeline.

Remove the spacer or old water meter.

Remove old washer, clean sealing faces and install ber gaskets.

Install the HYDRUS so that the arrow on the housing points with in
the direction of the water ow.
Install the HYDRUS in the pipeline, avoid mechanical stresses.
Protect the HYDRUS against pressure surges in the pipeline.
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HYDRUS
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