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min. 25cm between signal cables and other installations.
If two or more meters are to be installed shall be in parallel, the axis-center distance
between two meters shall be at least 135mm minimum.
3.2 Before Installation
Prior to installation of the flow sensor, the pipe shall be thoroughly flushed out, and any dirty,
stone alike items must be removed from the pipe. Cavitation in the system must be avoided.
If a risk of frost exists, empty the system and, if necessary, remove the meter. If the water is
soiled, fit the strainer in the pipe before the meter.
3.3 Mounting of Flow Sensor
Consider the dimensions of the water meter, and the distance with surroundings, minimum
3 cm free space.
Straight sections of 10×DN before and 5×DN after the meter are recommended, to
homogenize the temperatures of water.
The meter is to be installed so that the direction of the arrow on the meter housing
corresponds to the direction of flow. Avoid the collection of air bubbles in the meter during
the installation process.
The connecting pipe at the two ends must be on the same horizontal level. Install
horizontally only, not tilted, inclined or overhead. Install the flow sensor into horizontal or up
streaming pipelines.
Do not install at highest point of piping to avoid air inside the flow sensor. The flow sensor
must NOT be installed in the positions where swirling flow exists (swirling flow is normally
caused by bending pipe), or pulsatile flow exists (pulsatile flow is normally caused by pump,
therefore the flow sensor must be installed as far as possible from pump and must not be
installed on the outlet of pump) or air may build up.
A: Recommended flow sensor position
B: Recommended flow sensor position
C: Unacceptable flow sensor position
D: Unacceptable flow sensor position in open
system, acceptable in closed system.
3.4 Mounting Step
Step 1: Flush the piping system thoroughly before mounting the meter.
Step 2: Sufficient distance.10×DN straight pipe in upstream and 5×DN straight pipe in
