Diehl 775 Instrucciones De Montaje página 25

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Flow
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Calming sections are not necessary before and after the flow sensor.
For systems without temperature mixing, a straight DN 3 - 10 section
upstream of the flow sensor is recommended.
The meter can be installed in both horizontal and vertical pipe
sections, provided air bubbles cannot collect in the meter.
The flow sensor must always be filled with liquid.
Avoid frost at the meter.
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We recommend installing the flow sensor in a tilted position.
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The minimum system pressure must be 1 bar to avoid cavitation.
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Make sure the meter is installed sufficiently far away from possible
sources of electromagnetic interference (switches, electric motors,
fluorescent lamps etc.).
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If possible install the cables of the flow sensor or temperature sensor
freely suspended (not bundled - aerial effect) with sufficient distance
from electromagnetic interference sources.
T: 5 ... 90 °C
T > T
water ambient
Return
T: 5 ... 130 / 150 °C
T < T
Wasser ambient
No pictogram
(Installation position
can be set on site,
see 6.1 page 29)
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