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Subject to modications and errors excepted. Any liability for misprints excluded. SAP144505_150706_EN
Installation instructions
General Information
Read these instructions carefully right up to the
end before starting to mount the device! The in-
stallation has to be done by qualied profession-
al personnel. The current laws and regulations
so as the generally accepted engineering prin-
ciples have to be observed during mounting and
tting, especially EN1434 part 1+6, (in Germany
also AGFW directive FW202, FW510, FW218
and DIN4713 part 4 and the initial verication di-
rective). At devices with M-Bus the general rules
of technology and the respective regulations for
electrical installations have to be followed.Make
sure no heating water escapes during installation
– this can cause burns!
The maximum heating water temperature at the
ow sensor may not exceed depending on ver-
sion 90°C respectively 130°C. For heating water
temperature over 90°C or using as a cooling me-
ter, the detachable calculator has to be mounted
separately with the supplied mounting adapter.
For heating systems with a lack of temperature
mixing resp. with temperature stratication a
straight pipeline of min. 10xDN has to be pro-
vided upstream of the installation point.
The ow measuring section is wear-free because
no moving parts. No inlet or outlet sections are
necessary. It is important to ensure adequate
system pressure to avoid cavitation. The review
of the approval can be identied denitely in the
display menu (Level 3).
ZENNER recommends to use direct temperature
measurement and not to use immersion sleeves.
Mounting flow sensor (VMT)
■ Mount ball valves up- and downstream of the
VMT.
■ Consider the correct installation point (supply
or return). Normally this ist the return pipe
(cooler pipe at heating systems). Please note
the type plate information.
■ Consider the correct ow direction. This is
indicated by an arrow on the side of the VMT.
■ The ow sensor can be installed in any posi-
tion (also „overhead“).
■ Do not install at highest point of piping to
avoid air inside the ow sensor.
■ Consider the dimensions of the heat meter.
ZENNER International GmbH & Co. KG
Römerstadt 6
D-66121 Saarbrücken
Telephone +49 681 99 676-30
Telefax +49 681 99 676-3100
E-Mail info@zenner.com
Internet www.zenner.com
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