MADDALENA ElecTo SONIC, Инструкция по установке, использованию и техническому обслуживанию

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Install the meter:
– protected from frost (insulate it if necessary with insulation material) and in the lower
part of the system to prevent air accumulation;
– protected from blows and tampering, where readings are easy to make;
– so that the direction of the arrow on the device coincides with the flow direction.
Install proper interception valves upstream and downstream of the meter to permit main-
tenance operations and inspections on the device, as well as to check the system.
The installation of a non-return valve inside or outside the meter is also recommended (see
dedicated data sheet).
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WARNING!
Before positioning the seal, make sure that it is not damaged.
Make sure that the seal is not damaged during installation.
Make sure that the level of the seal matches that of the tubing.
Check that the seal does not protrude from the tube.
Make sure that the surfaces of the flange are clean and undamaged.
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WARNING!
Check the seal hold to prevent leakage.