EMS WT Series Operation & Installation Manual page 25

B. General instruction
 The meter must be installed by a trained and instructed worker. Thereby the
recognized standards of good practice have to be respected (we refer to the
instructions given in ISO 4064-5:2014).
 After the manufacturing process all meters are disinfected. The meters must be
stored in a dry, cool, dust and germs free environment. Prior installation the meter
must be disinfected again. Make sure that during the installation procedure all
hygienic standards and recommendations are respected.
C. Installation instructions
 The meter with flow stabilizer does not need any straight upstream or downstream
pipe (U0DO).
 The maximum medium temperature shall not exceed 50° when in operation and 70°
at down-time.
 The environmental temperature must be within 5 and 70°.
 The meters are classified acc. To 2014/32/EU (MID) in the mechanical environment
class M1 (M1 applies to instruments used in locations with vibration and shocks of
low significance) in the electromagnetic class E1 (E1 applies to instruments used in
locations with electromagnetic disturbances corresponding to those likely to be
found in residential, commercial and light industrial building).
 The pipe diameter should not be abruptly reduced or expanded directly upstream or
downstream the meter. All diameter changes should be done with an angle <8°
related to the pipe centre.
 All flow regulating devices (e.g. Valves, PRV's) shall be installed downstream of
the meter.
 When
selecting
(horizontal/vertical).
 Gaskets must not protrude into the pipeline or be mis-aligned.
 The pipeline must be thoroughly flushed before installing the meter to prevent
damage from debris.
 The flow direction of the meter (arrow on the meter body) must correspond with the
flow direction in the pipeline.
 After installation of the meter, the pipeline must be filled with water very slowly to
prevent the meter being damaged by surges. Filling the pipe too rapidly can cause
air/water surges which can destroy the meter insert.
 The installation site should be selected to prevent air bubbles collecting in the meter
and the pipeline must always be completely filled with water. Installation of a meter
at the highest point in a pipeline must be avoided. Eventually a suitable air release
the installation
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site, consider the meter orientation