Zenner IUW Series, Installation And Operating Instructions Manual

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7
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The pipe cross-section should not be reduced or
enlarged directly in front of or behind the measur-
ing instrument.
■
Connection seals must not protrude into the pipe
cross-section.
■
Valves or other flow regulators should be installed
behind of the measuring instrument if possible.
■
If necessary, the measuring instrument should be
protected by a filter, so that no foreign particles,
such as stones or sand, are flushed into the mea
-
suring instrument and cause damage.
■
The measuring instrument must be protected
against pressure surges in the pipe network.
■
The measuring instrument may only be installed
in a frost-proof location and the ambient tem-
perature must not 55 °C.
■
The measuring instrument should be installed,
where possible, at the deepest point of the pipe
installation so that air bubbles are not able to
form in the measuring instrument and the pipe is
always completely filled.
■
The water temperature must not exceed the per-
missible 50 °C (T50).
■
When using lubricants / assembly pastes e.g. for
the seals, it must be ensured that these are suit-
able for contact with drinking water.
■
If there is a risk of frost, shut off the system and
empty it completely (including the measuring
instrument!), removing the measuring instrument
if necessary.
Installation manual
■
Read the installation instructions carefully right
up to the end before beginning installation.
■
Prior to installing the measuring instrument, the
pipe system is to be carefully flushed.
■
Close the valves upstream and downstream of the
measuring instrument and relieve the pressure at
the installation point.
■
Dismantle existing measuring instrument or
adapter piece.
■
Old seals must be removed immediately after
dismantling the existing measuring instrument or
adapter piece. The corresponding sealing surfaces
must be cleaned and checked for damage.
■
Check before starting installation:
–
that all sealing surfaces are plane and free of
damages such as notches, grooves or similar.
–
all information on the dial/register cap/type
plate must be readable.
–
the measuring instrument is suitable in
design, size, temperature range and
pressure rating for the installation site.
■
Only use new and flawless sealing material.
■
It must be ensured that the flow direction of the
measuring instrument matches that of the pipe.
■
Tighten the fixing screws of the measuring instru -
ment crosswise and evenly while ensuring that
the seals are correctly situated.
■
It must be ensured that the meter is installed in
a tensionless state in the pipe. In the case of an
installation that is not tensionless, the housing of
the measuring instrument can be damaged and
water may escape.
■
To prevent damage to the measuring instrument
caused by pressure surges after installation, the
pipe must be filled slowly after installation.
■
The measuring instrument must be easily acces-
sible at all times after installation to guarantee
that the identify data and the conformity/metrol-
ogy mark can be read at all times.
■
Check all sealing points for leaks after installation.
■
We recommend securing the connection points
against unauthorised disassembly with a user
safeguard. It should not be possible to remove or
loosen the user safeguard without visibly damag-
ing.
The declaration of conformity is included in the
delivery. The latest information on this product can
be called up from
www.zenner.com