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Installation and operating instructions
Ultrasonic apartment and residential water meter IUWS
Product description
Ultrasonic apartment / residential water meter
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type IUWS for cold water up to 50 °C.
With ex-works integrated wM-Bus (OMS certified
■
version available) or LoRa® radio interface.
There is also the option of connecting an external
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radio module (NDC wM-Bus or NDC LoRa®) to the
NDC interface of the meter. In this case, the inter-
nal radio interface is automatically deactivated.
Intended use
For the consumption measurement of cold and clean
drinking water or service water up to 50 °C
Scope of supply
Ultrasonic water meter type IUWS with ex-works
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integrated wM-Bus or LoRa® radio interface.
Installation / operation manaual / declaration of
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conformity
Note
This installation manual is intended for qualified
specialists only. Basic installation steps are therefore
not described. In order to ensure a proper flow
measurement, the measuring device must be
completely filled with water at all times.
NDC modules or pulse sensors may be retrofitted
to the installation point of the meter if required.
Retrofitting should only be carried out by qualified
specialists. It is recommended to secure the modules
against unauthorised removal with a user safeguard.
Permissible installation positions
The IUWS series is intended for "any" installation
position (even overhead).
Activating of the measuring device
Upon delivery, the display of the measuring device is
in "sleep mode". The display is activated ten seconds
after the measuring device has been filled with
water. For this purpose, the pipeline or measuring
device must be completely vented or filled with
water. Optional options for activation: use of the MSS
software + MinoConnect Set USB NFC or by means of
the Zenner Device Manager Basic app.
The measuring device can be retrofitted with the
following NDC modules: wM-Bus, LoRaWAN®
Safety instructions
Water meters are precision devices. Protect
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against shock and vibration. Store in a frost-free,
cool and dry location.
Suitable measures must be taken to ensure that
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any contamination or damage is excluded during
transport to the installation location.
If this measuring device is used in an EU country,
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it is subject to a metrological test of the respective
EU member state.
The IUWS series has been approved with a flow
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sensitivity class U0/D0 (no inlet outlet section
required). However, to achieve the best measure-
ment results, we recommend observing national
regulations and recognised rules of technology.
For the IUW series at least 3xDN are recommended
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as a straight inlet section. Ideally, at least 2xDN
should be available as the outlet distance.
The pipe cross-section should not be reduced or
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extended directly in front of or behind the measur-
ing device.
Connection seals must not protrude into the pipe
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cross-section.
Valves or other flow regulators should be installed
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behind of the measuring device if possible.
If necessary, the measuring device should be pro-
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tected by a filter, so that no foreign particles, such
as stones or sand, are flushed into the measuring
device and cause damage.
The measuring device must be protected against
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pressure surges in the pipe network.
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