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3.2 Installing the ow sensor
During heat application, T
water
> T
ambient
must be permanent.
During cold application or with T
water
< T
ambient
variant cooling
meter is to be used.
Mounting position / Position
The meter can be installed in both horizontal and vertical pipe sec-
tions (see g. I).
We recommend installing the ow sensor in a tilted position, to trans-
port possible air bubbles from the circulation(see g. II).
Install the ow sensor so that the ow direction matches the arrow
direction on the sensor (see g. III).
Depending on the version, the ow sensor must be installed in ow
or return. The installation position is displayed in the info loop 3.4
(see "Information loop (3)" at page 15) and also by means of a
pictogram.
Flow Return
Please make sure that the ow sensor is always lled with water.
The meter measures only the energy of completely lled pipe-
lines. Otherwise a corresponding error message is shown in the
display.
The minimum system pressure to avoid cavitation is 1 bar.
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