Installation Instructions - Zenner WZ Manuel D'installation

English

Installation instructions

Single / Multi jet meters / Cartridge meters
General notes
Water meters are precision instruments. Protect
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against shock and vibration. Storage under cool,
dry and frost free conditions.
The sealing surfaces are equipped with thread
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protection caps, and thus protected from
damage.
Check and ensure before beginning the installation:
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–
That the sealing faces are flat and free from
damage such as notches, grooves, etc..
–
That all indications on the dial are readable.
(Data regarding the flow rates are depending on
the respective nominal size).
–
The meter fits in type, size, temperature and
pressurerating to the installation and metering
point.
With polluted or loaded water we recommend that
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filters or strainers in the inlet must be
installed upstream of the meter.
The meter should always be installed at the
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lowest possible point of the piping as well as frost
protected, to prevent the accumulation of air and
damages.
The watermeter must be installed into the pipeline
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free of any of mechanical forces or tensions.
Watermeters must be operating completely filled
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with water - for wet dial meters this includes also
the counter!
The meter must be protected with appropriate
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measures against pressure shocks in the pipeline.
When there is danger of frost, empty completely
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and shut off the installation (including the meter), if
necessary, dismount the meter.
The meter must always be easily accessible and
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legible, including all indications on the dial.
We recommend that the installation points on
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the pipeline should be secured with a seal against
unauthorized dismounting. The seal should not be
removable or loosened without visible damage.
ZENNER International GmbH & Co. KG
Römerstadt 6 | 66121 Saarbrücken | Germany
Phone +49 681 99 676-30
Fax +49 681 99 676-3100
E-Mail info@zenner.com
Internet www.zenner.com
The installation has to be done by qualified profes-
■
sional personnel. We would refer to the applicable
rules of the DIN ISO 4064:2014, Part 5.
All series has been approved with a flow sensitivity
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class U0/D0 (no inlet outlet section required).
All series are not approved for backflow measuring.
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Installation:
1. Read these instructions carefully right up to the end!
2. Close valves upstream and downstream of the meter.
3. Release pressure at the installation point.
4. Dismount existing meters or meter blanks.
5. Use only new and flawless sealing material.
6. Check the gasket faces and threads for damages/
imperfections.
7. Install the new meter according to the correct flow-
direction and installation position. Ensure that the
sealing joints do not fall out, or are being damaged.
8. Screw the connection nuts and tighten them.
9. Open vales carefully and avoid pressure shocks,
purge adequately.
10. Check installation for leakage. The dial and the
indications regarding the conformity /metrology
must be visible and readable at any time.
Additional instructions for installation of plastic meter:
In order to guarantee a stress-free installation, we
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recommend the use of a water meter installation
bracket (WZAG).
Recommended tightening torque for the connec-
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tors: min. 20Nm up to max. 30Nm.
The declaration of conformity is included in the delivery.
This and the latest information about the product can
also be found at www.zenner.com
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